The MADRS is a clinician-rated scale designed to measure depression severity and detects changes due to antidepressant treatment. The scale consists of 10 items, each of which is scored from 0 (item not present or normal) to 6 (severe or continuous presence of the symptoms), summed for a total possible score of 60. Higher scores represent a more severe condition. The MADRS evaluates apparent sadness, reported sadness, inner tension, sleep appetite, concentration, lassitude, inability to feel (interest level), pessimistic thoughts, and suicidal thoughts. Negative change from baseline indicates improvement.

The enriched intent-to-treat (eITT) analysis set included all enrolled lead-in placebo non-responders who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-baseline MADRS assessment during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure.

The MADRS is a clinician-rated scale designed to measure depression severity and detects changes due to antidepressant treatment. The scale consists of 10 items, each of which is scored from 0 (item not present or normal) to 6 (severe or continuous presence of the symptoms), summed for a total possible score of 60. Higher scores represent a more severe condition. The MADRS evaluates apparent sadness, reported sadness, inner tension, sleep appetite, concentration, lassitude, inability to feel (interest level), pessimistic thoughts, and suicidal thoughts. Negative change from baseline indicates improvement.

The full intent-to-treat (fITT) analysis set included all enrolled participants who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-treatment baseline assessment of MADRS during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure.

An AE can be any unfavorable and unintended sign (including an abnormal finding), symptom, or disease temporally associated with the use of a medicinal (investigational or non investigational) product, whether or not related to that medicinal (investigational or non investigational) product. TEAEs were AEs with onset during the treatment period that has worsened since baseline.

The full safety analysis set included all enrolled participants who received at least 1 dose of study medication in the treatment period.

The SHAPS is a self-reported 14-item, instrument, developed for the assessment of hedonic capacity. Participants scored whether they experienced pleasure in performing a list of activities or experiences. Participants rated the answers as 1-4 where 1 indicates "Definitely agree", 2 indicates "Agree", 3 indicates "Disagree" and 4 indicates "Definitely disagree". The participant's item responses were summed to provide a total score ranging from 14 to 56. A higher total SHAPS score indicated higher levels of current anhedonia. Negative change from baseline indicated improvement.

The eITT analysis set included all enrolled lead-in placebo non-responders who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-baseline MADRS assessment during the treatment period. Here 'N' (number of participants analyzed) includes the number of participants evaluable for this outcome measure.

The SHAPS is a self-reported 14-item, instrument, developed for the assessment of hedonic capacity. Participants scored whether they experienced pleasure in performing a list of activities or experiences. Participants rated the answers as 1-4 where 1 indicates "Definitely agree", 2 indicates "Agree", 3 indicates "Disagree" and 4 indicates "Definitely disagree". The participant's item responses were summed to provide a total score ranging from 14 to 56. A higher total SHAPS score indicated higher levels of current anhedonia. Negative change from baseline indicated improvement.

The fITT analysis set included all enrolled participants who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-treatment baseline assessment of MADRS during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure.

CGI-S provides an overall clinician-determined summary measure of severity of participant's illness that considers all available information, including knowledge of participant's history, psychosocial circumstances, symptoms, behavior, and impact of symptoms on participant's ability to function. CGI-S evaluates severity of psychopathology on scale of 0 to 7. Participant is assessed on severity of mental illness at time of rating according to: 0=not assessed; 1=normal (not at all ill); 2=borderline mentally ill; 3=mildly ill; 4=moderately ill; 5=markedly ill; 6=severely ill; 7=among most extremely ill participants. Negative change in score indicates improvement.

eITT analysis set included all enrolled lead-in placebo non-responders who were randomized into a treatment period, received at least 1 dose of study medication, had at least 1 post-baseline MADRS assessment during treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure.

CGI-S provides an overall clinician-determined summary measure of severity of participants illness that considers all available information, including knowledge of participant's history, psychosocial circumstances, symptoms, behavior, and impact of symptoms on participant's ability to function. CGI-S evaluates severity of psychopathology on scale of 0 to 7. Participant is assessed on severity of mental illness at time of rating according to: 0=not assessed; 1=normal (not at all ill); 2=borderline mentally ill; 3=mildly ill; 4=moderately ill; 5=markedly ill; 6=severely ill; 7=among most extremely ill participants. Negative change in score indicates improvement.

fITT analysis set included all enrolled participants who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-treatment baseline assessment of MADRS during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure.

The SMDDS is a 16-item patient reported outcome (PRO) measure. Each item was rated by the participant according to a 5-point Likert scale. Participants respond to each question using a rating scale between 0 ("Not at all" or "Never") to 4 ("Extremely" or "Always"). Before summing the items to create a total score, item 11 ("how often did you have a poor appetite") and item 12 ("how often did you over eat") were combined into a single score by selecting the highest severity on either item. The total score was then created by summing the responses on the 15 items. The total score ranged from 0 to 60. The SMDDS uses a 7-day recall period and verbal rating scales. Higher score indicates more severe depressive symptomatology. Negative change from baseline indicates improvement.

The eITT analysis set included all enrolled lead-in placebo non-responders who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-baseline MADRS assessment during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure.

The SMDDS is a 16-item patient reported outcome (PRO) measure. Each item was rated by the participant according to a 5-point Likert scale. Participants respond to each question using a rating scale between 0 ("Not at all" or "Never") to 4 ("Extremely" or "Always"). Before summing the items to create a total score, item 11 ("how often did you have a poor appetite") and item 12 ("how often did you over eat") were combined into a single score by selecting the highest severity on either item. The total score was then created by summing the responses on the 15 items. The total score ranged from 0 to 60. The SMDDS uses a 7-day recall period and verbal rating scales. Higher score indicates more severe depressive symptomatology. Negative change from baseline indicates improvement.

fITT analysis set included all enrolled participants who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-treatment baseline assessment of MADRS during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure.

SATE questionnaire is a 3-item self-reported scale designed to provide additional information regarding participant's subjective experience while taking treatment. This was internal Janssen questionnaire and questions were asked to participant weekly by the Q1.6-app. For rating overall depression: participant selected one option out of Improved, not changed or got worse; for depression improvement: participant selected one option out of slightly improved, much improved or very much improved; and for depression worsen: participant selected slightly worse, much worse or very much worse.

The eITT analysis set included all enrolled lead-in placebo non-responders who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-baseline MADRS assessment during the treatment period. Here 'n' (number analyzed) refers to all participants evaluable for specified categories. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure.

SATE questionnaire is a 3-item self-reported scale designed to provide additional information regarding participant's subjective experience while taking treatment. This was internal Janssen questionnaire and questions were asked to participant weekly by the Q1.6-app. For rating overall depression: participant selected one option out of Improved, not changed or got worse; for depression improvement: participant selected one option out of slightly improved, much improved or very much improved; and for depression worsen: participant selected slightly worse, much worse or very much worse.

(fITT) analysis set included all enrolled participants who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-treatment baseline assessment of MADRS during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure. Here 'n' (number analyzed) refers to all participants evaluable for specified categories.

HAM-A scale assesses severity of different anxiety-related symptoms with a score range of 0 to 52. Higher score indicated severity in anxiety symptoms. Each of the 14 items is rated by clinician on a 5-point scale ranging from 0 (not present) to 4 (maximum degree). HAM-A6 is a uni-dimensional, 6-item subscale derived from HAM-A. HAM-A6 comprises of five psychic anxiety symptoms: anxious mood, psychic tension, fears, intellectual disturbances, and anxious behaviour observed at the interview, as well as one somatic item, muscular tension. HAM-A6 subscale score ranges from 0 to 24, with higher scores indicating greater severity of core symptoms.

eITT analysis set included all enrolled lead-in placebo non-responders who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-baseline MADRS assessment during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure.

HAM-A scale assesses severity of different anxiety-related symptoms with a score range of 0 to 52. Higher score indicated severity in anxiety symptoms. Each of the 14 items is rated by clinician on a 5-point scale ranging from 0 (not present) to 4 (maximum degree). HAM-A6 is a uni-dimensional, 6-item subscale derived from HAM-A. HAM-A6 comprises of five psychic anxiety symptoms: anxious mood, psychic tension, fears, intellectual disturbances, and anxious behaviour observed at the interview, as well as one somatic item, muscular tension. HAM-A6 subscale score ranges from 0 to 24, with higher scores indicating greater severity of core symptoms.

(fITT) analysis set included all enrolled participants who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-treatment baseline assessment of MADRS during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure.

SIGH-A is a 14-item scale to measure severity of different anxiety-related symptoms in participants. Each of the 14 items is rated by the clinician on a 5-point scale ranging from 0 (not present) to 4 (maximum degree). The SIGH-A total score is calculated by summing the 14 item scores, and ranges from 0 to 56 where higher score indicates worsening.

The eITT analysis set included all enrolled lead-in placebo non-responders who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-baseline MADRS assessment during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure.

SIGH-A is a 14-item scale to measure severity of different anxiety-related symptoms in participants. Each of the 14 items is rated by the clinician on a 5-point scale ranging from 0 (not present) to 4 (maximum degree). The SIGH-A total score is calculated by summing the 14 item scores, and ranges from 0 to 56 where higher score indicates worsening.

fITT analysis set included all enrolled participants who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-treatment baseline assessment of MADRS during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure.

Cmax was defined as maximum observed plasma concentration of JNJ-67953964.

eITT population included all enrolled lead-in placebo non-responders who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-baseline MADRS assessment during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure. Here 'n' (number analyzed) refers to all participants evaluable for specified time point categories.

AUC(0-24h) was defined as the area under the plasma concentration-time curve from time of administration to 24 hours.

eITT population included all enrolled lead-in placebo non-responders who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-baseline MADRS assessment during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure. Here 'n' (number analyzed) refers to all participants evaluable for specified time point categories.

AUCss was defined as the area under plasma concentration-time curve at Steady State (AUCss) of JNJ-67953964.

eITT population included all enrolled lead-in placebo non-responders who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-baseline MADRS assessment during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure. Here 'n' (number analyzed) refers to all participants evaluable for specified time point categories.

C0h was defined as predose plasma Concentration of JNJ-67953964.

eITT population included all enrolled lead-in placebo non-responders who were randomized into a treatment period, received at least 1 dose of study medication, and had at least 1 post-baseline MADRS assessment during the treatment period. Here 'N' (number of participants analyzed) refers to the number of participants evaluable for this outcome measure. Here 'n' (number analyzed) refers to all participants evaluable for specified time point categories.