The PASI is a measure of psoriasis and psoriatic arthritis severity that will be assessed at baseline and all follow-up visits for participants with psoriasis or psoriatic arthritis. This common clinical measure selects a representative area of psoriasis for each body region. The intensity of redness, thickness, and scaling of the psoriasis is assessed by the clinician. PASI scores range from 0 to 72, with higher scores indicating worse symptoms.

The PASI is a measure of psoriasis and psoriatic arthritis severity that will be assessed at baseline and all follow-up visits for participants with psoriasis or psoriatic arthritis. This common clinical measure selects a representative area of psoriasis for each body region. The intensity of redness, thickness, and scaling of the psoriasis is assessed by the clinician. PASI scores range from 0 to 72, with higher scores indicating worse symptoms.

NRS is the simplest and most commonly used scales to indicate the degree of pain, itch, and discomfort. The numerical scale is most commonly 0 to 10, with 0 being "no pain or Itch or discomfort" and 10 being "the worst imaginable pain or Itch or discomfort".

Scalp PGA assesses the overall severity of active psoriasis on the participant's scalp. Scalp lesions will be evaluated in terms of clinical signs of erythema, induration, and scaling and scored on 5-point ssPGA scale where 0=absence of disease and 4=severe disease. Higher scores indicate worsening.

The nail specific PGA is used to evaluate the current status of a participant's nail psoriasis on a scale of 0 to 4 (clear [0], minimal [1], mild [2], moderate [3], or severe [4]).

The PGA is a widely used outcome measure that relies on physician visual assessment of disease severity. The PGA determines psoriasis severity at a single point in time, without taking the baseline disease condition into clear (0), almost clear (1), mild (2), moderate (3), severe (4).

PSO is a self-administered questionnaire designed to address impact of PSO on family and partners by Family PSO questionnaire. Family PSO is a self-administrated questionnaire to assess the burden on partners of patients with psoriasis. The questionnaire has 15 items divided into five factors: (1) perceived strain by social reactions to the partner's psoriasis; (2) strain caused by cleaning; (3) acute emotional strain attributed directly to the psoriasis; (4) restrictions of social life; and (5) general emotional strain. The items are scaled in a 5-point Likert format: 0='not true', 1='somewhat true', 2='moderately true', 3='quite true', 4='very true', with the supplementary option 'does not apply to me'.

The HADS is a self-report rating scale of 14 items on a 4-point Likert scale (range 0-3). It is designed to measure anxiety and depression (7 items for each subscale). The total score is the sum of the 14 items, and for each subscale the score is the sum of the respective seven items (ranging from 0-21). A score between 0 and 7 is 'normal', between 8 and 10 shows "light" level, between 11 and 14 "moderate" level, and between 15 and 21 "severe" level of anxiety/depression.

FACIT-F is a questionnaire-based tool (FACIT-F, Vision 4) used to measure fatigue in patients. It consists of multiple items, each focusing on a different aspect of fatigue. The items are typically rated on a scale from 0 to 4, with 0 representing "not at all" and 4 representing "very much". Example items include: "I feel tired" or "I'm too tired to working". Higher scores indicate less fatigue.

To determine the correlation between the aforementioned parameters, in particular WHO-5 and HADS. Correlations between parameters are tested by the non-parametric Spearman test. In case of significant correlations, and if the nature of the data allows it, the conduct of more advanced regression analyses is permissible.

To determine the correlation between the aforementioned parameters, in particular WHO-5 and FACIT-F. Correlations between parameters are tested by the non-parametric Spearman test. In case of significant correlations, and if the nature of the data allows it, the conduct of more advanced regression analyses is permissible.