QoLAF-Q evaluates QoL among participants with both simple and complex AF. It is composed of a total of 14 items with a Likert scale from 1 to 5 points. Its score range is the following: zero impact=14 points; limited impact=15 to 28 points; moderate impact=29 to 42 points; high impact=43 to 56 points; and very high impact=57 to 70 points.

The EQ-5D- is a generic, self-reported measure of utility that consists of a five-item descriptive system and a visual analogue scale (EQ VAS). The descriptive system has two versions, namely the 3L and 5L, both involving five health dimensions (mobility, self-care, usual activities, pain/discomfort and anxiety/depression). In the EQ-5D-5L that will be used, participants may choose from the following five response levels: no problems=1; slight problems=2; moderate problems=3; severe problems=4; and unable to/extreme problems=5. Higher values indicate worst health.

FIQOL comprises of 29 items that cover four dimensions of perceived health: lifestyle (10 items), behavior (9 items), depression/ self-perception (7 items), and embarrassment (3 items). Each item has a range of 1 to 4, with 1 being the lowest value for the state of quality of life.

The PSS assesses participant's perceived nonspecific stress in a given situation or a daily life situation. The overall score of the scale is measured on a 14-item scale (from 0 to 4 points). Each item is scored 0 (never) to 4 (very often). Total score is obtained by inverting the scores on items 4, 5, 6, 7, 9, 10 y 13 (as follows: 0=4, 1=3, 2=2, 3=1 y 4=0) and summing up the scores of the 14 items. Higher total scores indicate higher perceived stress.

The IIEF is a multi-dimensional, self-administered questionnaire to assess erectile dysfunction. A score of 0 to 5 is awarded to each of the 15 questions that examine the 4 main domains of male sexual function: Erectile Function (EF), Orgasmic Function (OF), Sexual Desire (SD) and Intercourse Satisfaction (IS). EF has five categories: 1-10(Severe Erectile Dysfunction), 11-16(Moderate dysfunction), 17-21(Mild to moderate dysfunction), 22-25(Mild dysfunction), 26-30 (No dysfunction). OF: sum of Questions (Q) 9 and Q10, each rated 0 (no sexual stimulation) to 5 (almost always/always). OF domain score range: 0 to 10; lower scores denoted lower OF. SD: sum of Q11 and Q12, each rated 1 (almost never or low/no sexual desire) to 5 (almost always or very high sexual desire). SD domain score range: 2 to 10;lower scores denoted lower SD. IS: sum of Q6, Q7, and Q8, each rated 0 (low/no satisfaction) to 5 (high satisfaction). IS domain score range: 0 to 15; lower scores denoted lower satisfaction.

The FSFI is a 19-item multidimensional self-report questionnaire for the assessment of female sexual function. It has five domains of sexual function, including: desire and subjective arousal, lubrication, orgasm, satisfaction, and pain/discomfort. FSFI is scored on a scale ranging from 1.2 to 6.0 (desire), 0 to 6.0 (arousal, lubrication, orgasm, and pain/discomfort) or 0.8 to 6.0 (satisfaction), with higher scores indicating better performance. The total score, falling in a possible range from 2.0 to 36.0, is obtained by adding the six domain scores together.

Biological data includes blood count, electrolytes, C-reactive protein (CRP), and fecal calprotectin.

The Charlson Comorbidity Index is a 19-item measure assessing comorbid conditions. The total possible score on the Charlson Comorbidity Index ranges from 0 to 37. If a condition is not present, the score for that condition is zero. The higher scores indicate greater comorbidity.

Montreal Classification includes age at diagnosis, disease location and disease behavior. Disease behavior was classified according to the following: B1 = non-stricturing, non-penetrating; B2 = structuring; B3 = penetrating; P = perianal disease modifier. The change in Montreal Classification is presented in three categories: no change, deterioration, and improvement. Deterioration defined as an increase in behavior index between 1 and 3, or development of perianal disease.

HBI score is used to measure the disease activity of CD. It consists of clinical parameters: general well-being (0-4, where higher score means lower well being), abdominal pain (0-3, higher score means more severe pain), number of liquid stools per day, abdominal mass (0-3, where higher score means presence of swelling in the abdomen), and complications (score 1 per item). Total score is the sum of individual parameters. The score ranges from a minimum score of 0 to no pre-specified maximum score as it depends on the number of liquid stools, where higher scores indicating more severe disease.

The PDAI is a scoring system to evaluate the severity of perianal lesion associated with CD. It includes the following 5 items: (a) Discharge; (b) Pain; (c) Restriction of sexual activity; (d) Type of perianal disease; and (e) Degree of induration. Each item is graded on a 5-point scale ranging from no symptoms (score of 0) to severe symptoms (score of 4) and total range of score is from 0 to 20. Higher score means more severe disease.

A parametric test will be used to measure the degree of association between the QolAF score and clinical variable. QoLAF-Q evaluates QoL among participants with both simple and complex AF. It is composed of a total of 14 items with a Likert scale from 1 to 5 points. Its score range is the following: zero impact=14 points; limited impact=15 to 28 points; moderate impact=29 to 42 points; high impact=43 to 56 points; and very high impact=57 to 70 points.

The effectiveness of different treatment options for CPF grouped according to therapeutic class (medical treatment, surgery or both) will be defined as the absence of draining despite gentle finger compression.

HCRU includes emergency department and Intensive Care Units (ICU) visits; hospitalization (greater than or equal to (>=) 24 hours or related complications; number, type and reason for gastroenterology specialist or other specialty referral outpatient visits for management of complex perianal fistulas; surgeries or related complications; number of Magnetic Resonance Imaging (MRI) of the pelvis or transperineal, endoscopic ultrasound (EUS), and other non-surgical procedures performed to guide therapy, number of blood tests performed.

Correlations between the scores obtained in the QoLAF-Q scale and the scores obtained in the RAFIS and EQ-5D-5L will be studied using Pearson correlation coefficients. QoLAF-Q evaluates QoL among participants with both simple and complex AF. It consists of a total of 14 items with a Likert scale from 1-5 points. Its score ranges:zero impact=14 points;limited impact=15 to 28 points; moderate impact=29 to 42 points;high impact=43 to 56 points;and very high impact=57 to 70 points. The EQ-5D- is a generic, self-reported measure of utility that consists of a 5-item descriptive system and EQ VAS. The descriptive system has 2 versions: 3L and 5L,both involving 5 health dimensions (mobility,self-care,usual activities, pain/discomfort and anxiety/depression). In the EQ-5D-5L that will be used, participants may choose from the following 5 response levels:no problems=1; slight problems=2;moderate problems=3; severe problems=4;and unable to/extreme problems=5.Higher values indicate worst health.