The PSFS measures the functional status of the patient. The patient is asked to name the three most important activities for him that are difficult for him or which he is unable to perform because of his problems. Finally, the patient scores the degree of impairment in the activities on an 11-point NRS scale (0-10), where 0 stands for 'cannot perform the activity' and 10 'can perform the activity just as well as before occurrence of the problem'.

The PSFS measures the functional status of the patient. The patient is asked to name the three most important activities for him that are difficult for him or which he is unable to perform because of his problems. Finally, the patient scores the degree of impairment in the activities on an 11-point NRS scale (0-10), where 0 stands for 'cannot perform the activity' and 10 'can perform the activity just as well as before occurrence of the problem'.

The PSFS measures the functional status of the patient. The patient is asked to name the three most important activities for him that are difficult for him or which he is unable to perform because of his problems. Finally, the patient scores the degree of impairment in the activities on an 11-point NRS scale (0-10), where 0 stands for 'cannot perform the activity' and 10 'can perform the activity just as well as before occurrence of the problem'.

The SF-36 is used to measure perceived health and health-related quality of life. The questionnaire has 36 items containing eight health-related categories: physical functioning, role limitations due to physical problems, role limitations due to emotional problems, pain, mental health, energy, general health perception, and social functioning. A high score corresponds to a better state of health.

The SF-36 is used to measure perceived health and health-related quality of life. The questionnaire has 36 items containing eight health-related categories: physical functioning, role limitations due to physical problems, role limitations due to emotional problems, pain, mental health, energy, general health perception, and social functioning. A high score corresponds to a better state of health.

The SF-36 is used to measure perceived health and health-related quality of life. The questionnaire has 36 items containing eight health-related categories: physical functioning, role limitations due to physical problems, role limitations due to emotional problems, pain, mental health, energy, general health perception, and social functioning. A high score corresponds to a better state of health.

The SF-36 is used to measure perceived health and health-related quality of life. The questionnaire has 36 items containing eight health-related categories: physical functioning, role limitations due to physical problems, role limitations due to emotional problems, pain, mental health, energy, general health perception, and social functioning. A high score corresponds to a better state of health.

The patient's opinion about recovery after THA will be measured using the Global Perceived Effect (GPE) score on a 7-point Likert scale, where 1 stands for "a lot worse" and 7 for "a lot better".

The patient's opinion about recovery after THA will be measured using the Global Perceived Effect (GPE) score on a 7-point Likert scale, where 1 stands for "a lot worse" and 7 for "a lot better".

The patient's opinion about recovery after THA will be measured using the Global Perceived Effect (GPE) score on a 7-point Likert scale, where 1 stands for "a lot worse" and 7 for "a lot better".

The patient's opinion about recovery after THA will be measured using the Global Perceived Effect (GPE) score on a 7-point Likert scale, where 1 stands for "a lot worse" and 7 for "a lot better".

The patient's opinion about recovery after THA will be measured using the Global Perceived Effect (GPE) score on a 7-point Likert scale, where 1 stands for "a lot worse" and 7 for "a lot better".

The patient's opinion about recovery after THA will be measured using the Global Perceived Effect (GPE) score on a 7-point Likert scale, where 1 stands for "a lot worse" and 7 for "a lot better".

The patient's opinion about recovery after THA will be measured using the Global Perceived Effect (GPE) score on a 7-point Likert scale, where 1 stands for "a lot worse" and 7 for "a lot better".

Patient satisfaction will be measured on an 11-point Numerical Rating Scale (NRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

Patient satisfaction will be measured on an 11-point Numerical Rating Scale (NRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

Patient satisfaction will be measured on an 11-point Numerical Rating Scale (NRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

Patient satisfaction will be measured on an 11-point Numerical Rating Scale (NRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

Patient satisfaction will be measured on an 11-point Numerical Rating Scale (NRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

Patient satisfaction will be measured on an 11-point Numerical Rating Scale (NRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

Patient satisfaction will be measured on an 11-point Numerical Rating Scale (NRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

Average pain intensity last week and pain intensity at the moment will be measured on an 11-point Numerical Pain Rating Scale (NPRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

Average pain intensity last week and pain intensity at the moment will be measured on an 11-point Numerical Pain Rating Scale (NPRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

Average pain intensity last week and pain intensity at the moment will be measured on an 11-point Numerical Pain Rating Scale (NPRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

Average pain intensity last week and pain intensity at the moment will be measured on an 11-point Numerical Pain Rating Scale (NPRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

Average pain intensity last week and pain intensity at the moment will be measured on an 11-point Numerical Pain Rating Scale (NPRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

Average pain intensity last week and pain intensity at the moment will be measured on an 11-point Numerical Pain Rating Scale (NPRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

Average pain intensity last week and pain intensity at the moment will be measured on an 11-point Numerical Pain Rating Scale (NPRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

Average pain intensity last week and pain intensity at the moment will be measured on an 11-point Numerical Pain Rating Scale (NPRS), where 0 stands for "no pain" and 10 for "worst imaginable pain".

The 30-second Chair Stand Test will be used to assess sit-to-stand activity (physical function). The maximum number of chair stand repetitions within 30 seconds will be used as the outcome value. Movement quality during the performance-based tests is assessed based on acceleration data measured with an Inertial Measurement Unit (IMU).

The 30-second Chair Stand Test will be used to assess sit-to-stand activity (physical function). The maximum number of chair stand repetitions within 30 seconds will be used as the outcome value. Movement quality during the performance-based tests is assessed based on acceleration data measured with an Inertial Measurement Unit (IMU).

The 30-second Chair Stand Test will be used to assess sit-to-stand activity (physical function). The maximum number of chair stand repetitions within 30 seconds will be used as the outcome value. Movement quality during the performance-based tests is assessed based on acceleration data measured with an Inertial Measurement Unit (IMU).

The 30-second Chair Stand Test will be used to assess sit-to-stand activity (physical function). The maximum number of chair stand repetitions within 30 seconds will be used as the outcome value. Movement quality during the performance-based tests is assessed based on acceleration data measured with an Inertial Measurement Unit (IMU).

The 11-step Stair Climb Test will be used to assess ascending and descending stair activity (physical function). The time in seconds to ascend and descend 11 stairs will be used as the outcome value. Movement quality during the performance-based tests is assessed based on acceleration data measured with an Inertial Measurement Unit (IMU).

The 11-step Stair Climb Test will be used to assess ascending and descending stair activity (physical function). The time in seconds to ascend and descend 11 stairs will be used as the outcome value. Movement quality during the performance-based tests is assessed based on acceleration data measured with an Inertial Measurement Unit (IMU).

The 11-step Stair Climb Test will be used to assess ascending and descending stair activity (physical function). The time in seconds to ascend and descend 11 stairs will be used as the outcome value. Movement quality during the performance-based tests is assessed based on acceleration data measured with an Inertial Measurement Unit (IMU).

The 11-step Stair Climb Test will be used to assess ascending and descending stair activity (physical function). The time in seconds to ascend and descend 11 stairs will be used as the outcome value. Movement quality during the performance-based tests is assessed based on acceleration data measured with an Inertial Measurement Unit (IMU).

The 40-meter (4x10-meter) Fast Paced Walk Test will be used to assess short distance walking activity (physical function). The time in seconds to walk 4 x 10 meters for a total of 40 meters will be used as the outcome value. Movement quality during the performance-based tests is assessed based on acceleration data measured with an Inertial Measurement Unit (IMU).

The 40-meter (4x10-meter) Fast Paced Walk Test will be used to assess short distance walking activity (physical function). The time in seconds to walk 4 x 10 meters for a total of 40 meters will be used as the outcome value. Movement quality during the performance-based tests is assessed based on acceleration data measured with an Inertial Measurement Unit (IMU).

The 40-meter (4x10-meter) Fast Paced Walk Test will be used to assess short distance walking activity (physical function). The time in seconds to walk 4 x 10 meters for a total of 40 meters will be used as the outcome value. Movement quality during the performance-based tests is assessed based on acceleration data measured with an Inertial Measurement Unit (IMU).

The 40-meter (4x10-meter) Fast Paced Walk Test will be used to assess short distance walking activity (physical function). The time in seconds to walk 4 x 10 meters for a total of 40 meters will be used as the outcome value. Movement quality during the performance-based tests is assessed based on acceleration data measured with an Inertial Measurement Unit (IMU).

Thermal Quantitative sensory testing (QST) will be used to investigate nociceptive stimulus processing. QST is a non-invasive examination of the somatosensory system commonly used in pain diagnosis. The Medoc Advanced Thermosensory Stimulator (TSA) - 2 system will be used to perform a standardized test protocol.

Detection and pain threshold temperatures (in °C) will be assessed locally (at the most painful site of the hip) and remotely (at the contralateral wrist) using the TSA limits protocol:

• Cold Detection Threshold (CDT)
• Warmth Detection Threshold (WDT)
• Cold Pain Threshold (CPT)
• Heat Pain Threshold (HPT)

Thermal Quantitative sensory testing (QST) will be used to investigate nociceptive stimulus processing. QST is a non-invasive examination of the somatosensory system commonly used in pain diagnosis. The Medoc Advanced Thermosensory Stimulator (TSA) - 2 system will be used to perform a standardized test protocol.

Detection and pain threshold temperatures (in °C) will be assessed locally (at the most painful site of the hip) and remotely (at the contralateral wrist) using the TSA limits protocol:

• Cold Detection Threshold (CDT)
• Warmth Detection Threshold (WDT)
• Cold Pain Threshold (CPT)
• Heat Pain Threshold (HPT)

Thermal Quantitative sensory testing (QST) will be used to investigate nociceptive stimulus processing. QST is a non-invasive examination of the somatosensory system commonly used in pain diagnosis. The Medoc Advanced Thermosensory Stimulator (TSA) - 2 system will be used to perform a standardized test protocol.

Detection and pain threshold temperatures (in °C) will be assessed locally (at the most painful site of the hip) and remotely (at the contralateral wrist) using the TSA limits protocol:

• Cold Detection Threshold (CDT)
• Warmth Detection Threshold (WDT)
• Cold Pain Threshold (CPT)
• Heat Pain Threshold (HPT)

Thermal Quantitative sensory testing (QST) will be used to investigate nociceptive stimulus processing. QST is a non-invasive examination of the somatosensory system commonly used in pain diagnosis. The Medoc TSA-2 system will be used to perform a standardized test protocol.

Temporal summation of pain (TSP) will be assessed at the contralateral wrist using a 2-minute tonic heat stimulus and patient-controlled temperature. Participants are presented with a tonic heat stimulus and are instructed to maintain their initial sensation for two minutes via the remote controller. To quantify temporal adaptation and temporal summation of pain, the slope and magnitude of temperature changes will be extracted and the areas under the curve will be calculated.

Thermal Quantitative sensory testing (QST) will be used to investigate nociceptive stimulus processing. QST is a non-invasive examination of the somatosensory system commonly used in pain diagnosis. The Medoc TSA-2 system will be used to perform a standardized test protocol.

Temporal summation of pain (TSP) will be assessed at the contralateral wrist using a 2-minute tonic heat stimulus and patient-controlled temperature. Participants are presented with a tonic heat stimulus and are instructed to maintain their initial sensation for two minutes via the remote controller. To quantify temporal adaptation and temporal summation of pain, the slope and magnitude of temperature changes will be extracted and the areas under the curve will be calculated.

Thermal Quantitative sensory testing (QST) will be used to investigate nociceptive stimulus processing. QST is a non-invasive examination of the somatosensory system commonly used in pain diagnosis. The Medoc TSA-2 system will be used to perform a standardized test protocol.

Temporal summation of pain (TSP) will be assessed at the contralateral wrist using a 2-minute tonic heat stimulus and patient-controlled temperature. Participants are presented with a tonic heat stimulus and are instructed to maintain their initial sensation for two minutes via the remote controller. To quantify temporal adaptation and temporal summation of pain, the slope and magnitude of temperature changes will be extracted and the areas under the curve will be calculated.

Thermal Quantitative sensory testing (QST) will be used to investigate nociceptive stimulus processing. QST is a non-invasive examination of the somatosensory system commonly used in pain diagnosis. The Medoc TSA-2 system will be used to perform a standardized test protocol.

Temporal summation of pain (TSP) will be assessed at the contralateral wrist using a 2-minute tonic heat stimulus and patient-controlled temperature. Participants are presented with a tonic heat stimulus and are instructed to maintain their initial sensation for two minutes via the remote controller. To quantify temporal adaptation and temporal summation of pain, the slope and magnitude of temperature changes will be extracted and the areas under the curve will be calculated.

Thermal Quantitative sensory testing (QST) will be used to investigate nociceptive stimulus processing. The Medoc TSA-2 system will be used to perform a standardized test protocol.

Conditioned pain modulation will be evaluated using a Dual-Thermode program with two different stimuli:

• Test stimulus: this heat stimulus will be administered twice at the contralateral wrist. Once on its own before administering the conditioning stimulus, and once during the conditioning heat stimulus at the ipsilateral wrist.
• Conditioning stimulus: this heat stimulus will be administered at the ipsilateral wrist after first applying the test stimulus.

The difference in pain intensity at the contralateral wrist during the stand-alone test stimulus and the test stimulus during the conditioning stimulus will be calculated. Pain intensity is assessed using a Numerical Pain Rating Scale (NPRS) ranging from 0 to 100, where 0 stands for "no pain", and 100 for "worst imaginable pain".

Thermal Quantitative sensory testing (QST) will be used to investigate nociceptive stimulus processing. The Medoc TSA-2 system will be used to perform a standardized test protocol.

Conditioned pain modulation will be evaluated using a Dual-Thermode program with two different stimuli:

• Test stimulus: this heat stimulus will be administered twice at the contralateral wrist. Once on its own before administering the conditioning stimulus, and once during the conditioning heat stimulus at the ipsilateral wrist.
• Conditioning stimulus: this heat stimulus will be administered at the ipsilateral wrist after first applying the test stimulus.

The difference in pain intensity at the contralateral wrist during the stand-alone test stimulus and the test stimulus during the conditioning stimulus will be calculated. Pain intensity is assessed using a Numerical Pain Rating Scale (NPRS) ranging from 0 to 100, where 0 stands for "no pain", and 100 for "worst imaginable pain".

Thermal Quantitative sensory testing (QST) will be used to investigate nociceptive stimulus processing. The Medoc TSA-2 system will be used to perform a standardized test protocol.

Conditioned pain modulation will be evaluated using a Dual-Thermode program with two different stimuli:

• Test stimulus: this heat stimulus will be administered twice at the contralateral wrist. Once on its own before administering the conditioning stimulus, and once during the conditioning heat stimulus at the ipsilateral wrist.
• Conditioning stimulus: this heat stimulus will be administered at the ipsilateral wrist after first applying the test stimulus.

The difference in pain intensity at the contralateral wrist during the stand-alone test stimulus and the test stimulus during the conditioning stimulus will be calculated. Pain intensity is assessed using a Numerical Pain Rating Scale (NPRS) ranging from 0 to 100, where 0 stands for "no pain", and 100 for "worst imaginable pain".

Thermal Quantitative sensory testing (QST) will be used to investigate nociceptive stimulus processing. The Medoc TSA-2 system will be used to perform a standardized test protocol.

Conditioned pain modulation will be evaluated using a Dual-Thermode program with two different stimuli:

• Test stimulus: this heat stimulus will be administered twice at the contralateral wrist. Once on its own before administering the conditioning stimulus, and once during the conditioning heat stimulus at the ipsilateral wrist.
• Conditioning stimulus: this heat stimulus will be administered at the ipsilateral wrist after first applying the test stimulus.

The difference in pain intensity at the contralateral wrist during the stand-alone test stimulus and the test stimulus during the conditioning stimulus will be calculated. Pain intensity is assessed using a Numerical Pain Rating Scale (NPRS) ranging from 0 to 100, where 0 stands for "no pain", and 100 for "worst imaginable pain".

The MINI-S is a brief structured diagnostic interview for the major psychiatric disorders in the DSM-5. The MINI-S assesses the 17 most common disorders in mental health, including Bipolar Disorder Type 1 and Type 2, Major Depressive Disorder, Social Anxiety Disorder, Panic Disorder, Agoraphobia, Generalized Anxiety Disorder, Obsessive Compulsive Disorder, Post-Traumatic Stress Disorder, Acute Stress Disorder, Attention-Deficit/Hyperactivity Disorder, Anorexia Nervosa, Bulimia Nervosa, Alcohol Use Disorder, Substance other than alcohol Use Disorder, Psychotic Disorders.

The MINI-S is a brief structured diagnostic interview for the major psychiatric disorders in the DSM-5. The MINI-S assesses the 17 most common disorders in mental health, including Bipolar Disorder Type 1 and Type 2, Major Depressive Disorder, Social Anxiety Disorder, Panic Disorder, Agoraphobia, Generalized Anxiety Disorder, Obsessive Compulsive Disorder, Post-Traumatic Stress Disorder, Acute Stress Disorder, Attention-Deficit/Hyperactivity Disorder, Anorexia Nervosa, Bulimia Nervosa, Alcohol Use Disorder, Substance other than alcohol Use Disorder, Psychotic Disorders.

The Traumatic Experiences Checklist (TEC) is a self-reported questionnaire that investigates traumatic experiences in the past. The TEC consists of 31 items, which represent traumatic experiences. Participants should indicate whether they experienced the events and at what age it occurred. The extent to which the event was stressful for the person is also examined. This is scored on a 5-point scale ranging from 'to some extent' to 'to a very severe degree'.

The Traumatic Experiences Checklist (TEC) is a self-reported questionnaire that investigates traumatic experiences in the past. The TEC consists of 31 items, which represent traumatic experiences. Participants should indicate whether they experienced the events and at what age it occurred. The extent to which the event was stressful for the person is also examined. This is scored on a 5-point scale ranging from 'to some extent' to 'to a very severe degree'.

The CTQ is used to determine whether a person has experienced childhood trauma. The CTQ is a 25-item retrospective self-reported questionnaire that evaluates childhood events. Each question is answered on a 5-point Likert scale (1 never true, 2 often true, 3 sometimes, 4 often true, 5 true). The questionnaire assesses five dimensions of child abuse: (1) Physical abuse, (2) Emotional abuse, (3) Sexual abuse, (4) Physical neglect and (5) Emotional neglect.

The CTQ is used to determine whether a person has experienced childhood trauma. The CTQ is a 25-item retrospective self-reported questionnaire that evaluates childhood events. Each question is answered on a 5-point Likert scale (1 never true, 2 often true, 3 sometimes, 4 often true, 5 true). The questionnaire assesses five dimensions of child abuse: (1) Physical abuse, (2) Emotional abuse, (3) Sexual abuse, (4) Physical neglect and (5) Emotional neglect.

The HADS is a 14-item questionnaire evaluating anxiety and depression complaints without involving physical complaints. The HADS consists of two subscales, one subscale covers symptoms of anxiety (HADS-A), the other symptoms of depression (HADS-D). Each item is scored from zero ("not applicable") to three ("certainly applicable"). The maximum score on each subscale is 21, with higher values indicating more anxiety/depression symptoms.

The HADS is a 14-item questionnaire evaluating anxiety and depression complaints without involving physical complaints. The HADS consists of two subscales, one subscale covers symptoms of anxiety (HADS-A), the other symptoms of depression (HADS-D). Each item is scored from zero ("not applicable") to three ("certainly applicable"). The maximum score on each subscale is 21, with higher values indicating more anxiety/depression symptoms.

The HADS is a 14-item questionnaire evaluating anxiety and depression complaints without involving physical complaints. The HADS consists of two subscales, one subscale covers symptoms of anxiety (HADS-A), the other symptoms of depression (HADS-D). Each item is scored from zero ("not applicable") to three ("certainly applicable"). The maximum score on each subscale is 21, with higher values indicating more anxiety/depression symptoms.

The HADS is a 14-item questionnaire evaluating anxiety and depression complaints without involving physical complaints. The HADS consists of two subscales, one subscale covers symptoms of anxiety (HADS-A), the other symptoms of depression (HADS-D). Each item is scored from zero ("not applicable") to three ("certainly applicable"). The maximum score on each subscale is 21, with higher values indicating more anxiety/depression symptoms.

The HADS is a 14-item questionnaire evaluating anxiety and depression complaints without involving physical complaints. The HADS consists of two subscales, one subscale covers symptoms of anxiety (HADS-A), the other symptoms of depression (HADS-D). Each item is scored from zero ("not applicable") to three ("certainly applicable"). The maximum score on each subscale is 21, with higher values indicating more anxiety/depression symptoms.

Pain-related fear avoidance was assessed by the Dutch version of the FACS, which is a 20-item questionnaire, with each item scored on a 6-point Likert scale, resulting in scores ranging from zero ("completely disagree") to five ("completely agree"). There is a maximum total score of 100, with higher scores indicating more fear-avoidance. Five fear-avoidance-related severity levels have been proposed: subclinical (0 to 20), mild (21 to 40), moderate (41 to 60), severe (61 to 80), and extreme (81 to 100).

Pain-related fear avoidance was assessed by the Dutch version of the FACS, which is a 20-item questionnaire, with each item scored on a 6-point Likert scale, resulting in scores ranging from zero ("completely disagree") to five ("completely agree"). There is a maximum total score of 100, with higher scores indicating more fear-avoidance. Five fear-avoidance-related severity levels have been proposed: subclinical (0 to 20), mild (21 to 40), moderate (41 to 60), severe (61 to 80), and extreme (81 to 100).

Pain-related fear avoidance was assessed by the Dutch version of the FACS, which is a 20-item questionnaire, with each item scored on a 6-point Likert scale, resulting in scores ranging from zero ("completely disagree") to five ("completely agree"). There is a maximum total score of 100, with higher scores indicating more fear-avoidance. Five fear-avoidance-related severity levels have been proposed: subclinical (0 to 20), mild (21 to 40), moderate (41 to 60), severe (61 to 80), and extreme (81 to 100).

Pain-related fear avoidance was assessed by the Dutch version of the FACS, which is a 20-item questionnaire, with each item scored on a 6-point Likert scale, resulting in scores ranging from zero ("completely disagree") to five ("completely agree"). There is a maximum total score of 100, with higher scores indicating more fear-avoidance. Five fear-avoidance-related severity levels have been proposed: subclinical (0 to 20), mild (21 to 40), moderate (41 to 60), severe (61 to 80), and extreme (81 to 100).

Pain-related fear avoidance was assessed by the Dutch version of the FACS, which is a 20-item questionnaire, with each item scored on a 6-point Likert scale, resulting in scores ranging from zero ("completely disagree") to five ("completely agree"). There is a maximum total score of 100, with higher scores indicating more fear-avoidance. Five fear-avoidance-related severity levels have been proposed: subclinical (0 to 20), mild (21 to 40), moderate (41 to 60), severe (61 to 80), and extreme (81 to 100).

Pain-related fear of movement was assessed with the 17-item version of the TSK. Each item is scored on a 4-point Likert Scale, ranging from one ("strongly disagree") to four ("strongly agree"). The total score ranges between 17 and 68, with higher values reflecting greater fear of movement.

Pain-related fear of movement was assessed with the 17-item version of the TSK. Each item is scored on a 4-point Likert Scale, ranging from one ("strongly disagree") to four ("strongly agree"). The total score ranges between 17 and 68, with higher values reflecting greater fear of movement.

Pain-related fear of movement was assessed with the 17-item version of the TSK. Each item is scored on a 4-point Likert Scale, ranging from one ("strongly disagree") to four ("strongly agree"). The total score ranges between 17 and 68, with higher values reflecting greater fear of movement.

Pain-related fear of movement was assessed with the 17-item version of the TSK. Each item is scored on a 4-point Likert Scale, ranging from one ("strongly disagree") to four ("strongly agree"). The total score ranges between 17 and 68, with higher values reflecting greater fear of movement.

Pain-related fear of movement was assessed with the 17-item version of the TSK. Each item is scored on a 4-point Likert Scale, ranging from one ("strongly disagree") to four ("strongly agree"). The total score ranges between 17 and 68, with higher values reflecting greater fear of movement.

Perceived injustice was measured with the Injustice Experience Questionnaire (IEQ). The IEQ consists of 12 items, each item is scored from zero ("not at all") to four (all the time"). The total score ranges between 0 and 48 and higher total scores reflect higher levels of perceived injustice.

Perceived injustice was measured with the Injustice Experience Questionnaire (IEQ). The IEQ consists of 12 items, each item is scored from zero ("not at all") to four (all the time"). The total score ranges between 0 and 48 and higher total scores reflect higher levels of perceived injustice.

Perceived injustice was measured with the Injustice Experience Questionnaire (IEQ). The IEQ consists of 12 items, each item is scored from zero ("not at all") to four (all the time"). The total score ranges between 0 and 48 and higher total scores reflect higher levels of perceived injustice.

Perceived injustice was measured with the Injustice Experience Questionnaire (IEQ). The IEQ consists of 12 items, each item is scored from zero ("not at all") to four (all the time"). The total score ranges between 0 and 48 and higher total scores reflect higher levels of perceived injustice.

Perceived injustice was measured with the Injustice Experience Questionnaire (IEQ). The IEQ consists of 12 items, each item is scored from zero ("not at all") to four (all the time"). The total score ranges between 0 and 48 and higher total scores reflect higher levels of perceived injustice.

The General Self-Efficacy Scale is a self-reported questionnaire used to measure self-efficacy. The GSES measures how a person generally copes with stressors/difficult situations in life. It consists of ten statements (optimistic "self-beliefs") that ask about how people think and act in general. Items are scored on a 4-point Likert scale.

The General Self-Efficacy Scale is a self-reported questionnaire used to measure self-efficacy. The GSES measures how a person generally copes with stressors/difficult situations in life. It consists of ten statements (optimistic "self-beliefs") that ask about how people think and act in general. Items are scored on a 4-point Likert scale.

The General Self-Efficacy Scale is a self-reported questionnaire used to measure self-efficacy. The GSES measures how a person generally copes with stressors/difficult situations in life. It consists of ten statements (optimistic "self-beliefs") that ask about how people think and act in general. Items are scored on a 4-point Likert scale.

The General Self-Efficacy Scale is a self-reported questionnaire used to measure self-efficacy. The GSES measures how a person generally copes with stressors/difficult situations in life. It consists of ten statements (optimistic "self-beliefs") that ask about how people think and act in general. Items are scored on a 4-point Likert scale.

The 'Groningen Orthopedic Social Support Scale' is a self-reported questionnaire that has been developed to measure social support in patients with a THA or TKP. Social support is measured through 12 statements where the patient can choose from four answers: 'never or rarely', 'occasionally', 'regularly' or 'often'.

The 'Groningen Orthopedic Social Support Scale' is a self-reported questionnaire that has been developed to measure social support in patients with a THA or TKP. Social support is measured through 12 statements where the patient can choose from four answers: 'never or rarely', 'occasionally', 'regularly' or 'often'.

The 'Groningen Orthopedic Social Support Scale' is a self-reported questionnaire that has been developed to measure social support in patients with a THA or TKP. Social support is measured through 12 statements where the patient can choose from four answers: 'never or rarely', 'occasionally', 'regularly' or 'often'.

The 'Groningen Orthopedic Social Support Scale' is a self-reported questionnaire that has been developed to measure social support in patients with a THA or TKP. Social support is measured through 12 statements where the patient can choose from four answers: 'never or rarely', 'occasionally', 'regularly' or 'often'.

Hip muscle strength will be measured with the MicroFet 2®, a handheld dynamometer. In the test protocol, each muscle group will be tested three times, with the best value of the three tests as the final result. The following muscle groups will be tested:

• Hip flexors
• Hip abductors
• Hip extensors
• Hip external rotators
• Hip adductors

Hip muscle strength will be measured with the MicroFet 2®, a handheld dynamometer. In the test protocol, each muscle group will be tested three times, with the best value of the three tests as the final result. The following muscle groups will be tested:

• Hip flexors
• Hip abductors
• Hip extensors
• Hip external rotators
• Hip adductors

Hip muscle strength will be measured with the MicroFet 2®, a handheld dynamometer. In the test protocol, each muscle group will be tested three times, with the best value of the three tests as the final result. The following muscle groups will be tested:

• Hip flexors
• Hip abductors
• Hip extensors
• Hip external rotators
• Hip adductors

Hip muscle strength will be measured with the MicroFet 2®, a handheld dynamometer. In the test protocol, each muscle group will be tested three times, with the best value of the three tests as the final result. The following muscle groups will be tested:

• Hip flexors
• Hip abductors
• Hip extensors
• Hip external rotators
• Hip adductors

Perceived stress will be evaluated with a single question of the Perceived Stress Scale (PSS): 'During the past day, how often have you felt nervous and stressed?'. The question is scored on a 5-point Likert scale, from 0 'never' to 4 'very often'.

Perceived stress will be evaluated with a single question of the Perceived Stress Scale (PSS): 'During the past day, how often have you felt nervous and stressed?'. The question is scored on a 5-point Likert scale, from 0 'never' to 4 'very often'.

Perceived stress will be evaluated with a single question of the Perceived Stress Scale (PSS): 'During the past day, how often have you felt nervous and stressed?'. The question is scored on a 5-point Likert scale, from 0 'never' to 4 'very often'.

Perceived stress will be evaluated with a single question of the Perceived Stress Scale (PSS): 'During the past day, how often have you felt nervous and stressed?'. The question is scored on a 5-point Likert scale, from 0 'never' to 4 'very often'.

Perceived stress will be evaluated with a single question of the Perceived Stress Scale (PSS): 'During the past day, how often have you felt nervous and stressed?'. The question is scored on a 5-point Likert scale, from 0 'never' to 4 'very often'.

Perceived stress will be evaluated with a single question of the Perceived Stress Scale (PSS): 'During the past day, how often have you felt nervous and stressed?'. The question is scored on a 5-point Likert scale, from 0 'never' to 4 'very often'.

Perceived stress will be evaluated with a single question of the Perceived Stress Scale (PSS): 'During the past day, how often have you felt nervous and stressed?'. The question is scored on a 5-point Likert scale, from 0 'never' to 4 'very often'.

Perceived stress will be evaluated with a single question of the Perceived Stress Scale (PSS): 'During the past day, how often have you felt nervous and stressed?'. The question is scored on a 5-point Likert scale, from 0 'never' to 4 'very often'.