A Study to Assess the Severity of Psoriasis in Brazilians Participants With Chronic Plaque-type Psoriasis

Psoriasis severity will be graded as mild or moderate to severe based on psoriasis area and severity index (PASI) score or on the dermatology life quality index (DLQI) or on body surface area (BSA). Participants with a score greater than (>) 10 in any of these scales will be reported as moderate to severe psoriasis. Participants with a PASI score less than or equal to (<=) 10 will be reported as mild psoriasis. Assessment should consider the participant's status at inclusion.

Disease duration is the time from disease diagnosis to inclusion in the study.

The HADS has been developed to identify symptoms of anxiety and depression in hospitalized participants and in outpatients. It comprises 14 items, seven to assess anxiety (HADS-A), namely items 1, 3, 5, 7, 9, 11, and 13; and seven to assess depression (HADS-D), namely items 2, 4, 6, 8, 10, 12, and 14. Each item receives a score from 0 to 3 on a Likert Scale. The total score for each scale is obtained by adding the individual scores for each item, with the maximum score 21. The presence or absence of depression and anxiety will be defined, for each respective scale, based on the following cutoff values: HADS (anxiety): 0-8 = no anxiety; >9 = anxiety; HADS (depression): 8-8 = no depression; >9 = depression.

The presence of pain or discomfort over the past week will be assessed using the BPI. The BPI consists of 9 items related to pain (items 3 to 6) and the impact of pain/discomfort (items 9a to 9g) on general activity, mood, walking ability, work, relations with others, sleep and enjoyment of life. Each item is assessed on an 11-point scale varying from zero (no pain or no impact) to 10 (worst possible pain/worst possible impact). The items cover the dimensions of pain/discomfort severity and impact, and the scores are calculated from the means of each item, and may range from 0 to 10. The higher the score, the worse is the pain/discomfort and the perceived impact.

The HRQoL will be assessed using 36-Item Short-Form Health Survey (SF-36), to assess global HRQoL; and the Dermatology Life Quality Index (DLQI) to assess quality of life specifically related to dermatological conditions. The SF-36 comprises 36 questions divided in 8 domains: physical functioning (10 items), role-physical (4 items), bodily pain (2 items), general health (5 items), vitality (4 items), social functioning (2 items), role-emotional (3 items), mental health (5 items), and a question for comparative assessment of current health status with that of the previous year. The domain-specific scores range from 0 (worst status) to 100 (best status). DLQI comprises 10 questions evaluated on a scale from 0 (not at all) to 3 (very much). The total scores may range from 0 to 30, with higher scores indicating a higher level of disability.

Disorders related to alcohol abuse will be investigated using the cut down, annoyed by criticism, guilty and eye-opener (CAGE) questionnaire. CAGE is a brief questionnaire that comprises four questions to be answered affirmatively or negatively. Two affirmative answers warrant a screening for alcohol abuse or dependence.

Comorbidity refers to the presence of co-existing or additional diseases with reference to an initial diagnosis or with reference to the index condition that is the subject of study. Participants with Crohn's disease, systemic arterial hypertension, hyperlipidemia, arthritis, obesity, pruritus/burning sensation, depression, ulcerative colitis, metabolic syndrome, neoplasia, diabetes mellitus, ischemic disease and other cardiovascular disorders will be reported.