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Table 1 Items of the P-SIM

From: Psychometric Validation of the Psoriasis Symptoms and Impacts Measure (P-SIM), a Novel Patient-Reported Outcome Instrument for Patients with Plaque Psoriasis, Using Data from the BE VIVID and BE READY Phase 3 Trials

Item Response scale
1. During the past 24 h, how severe was your worst skin itching? 0 (No itching)–10 (Very severe itching)
2. During the past 24 h, how severe was your worst skin redness? 0 (No skin redness)–10 (Very severe skin redness)
3. During the past 24 h, how severe was your worst skin pain? 0 (No skin pain)–10 (Very severe skin pain)
4. During the past 24 h, how severe was your worst skin burning? 0 (No skin burning)–10 (Very severe skin burning)
5. During the past 24 h, how severe was your worst skin scaling? 0 (No skin scaling)–10 (Very severe skin scaling)
6. During the past 24 h, how severe was your worst skin cracking? 0 (No skin cracking)–10 (Very severe skin cracking)
7. During the past 24 h, how severe was your worst skin dryness? 0 (No skin dryness)–10 (Very severe skin dryness)
8. During the past 24 h, how severe was your worst skin irritation? 0 (No skin irritation)–10 (Very severe skin irritation)
9. During the past 24 h, how severe was your worst skin sensitivity? 0 (No skin sensitivity)–10 (Very severe skin sensitivity)
10. During the past 24 h, how severe was your worst skin lesions (red marks, spots, or inflammation)? 0 (No skin lesions)–10 (Very severe skin lesions)
11. During the past 24 h, how severe was your worst skin thickening (hardening or roughening)? 0 (No skin thickening)–10 (Very severe skin thickening)
12. During the past 24 h, at its worst, how severe was your psoriasis-related fatigue (weariness, tiredness)? 0 (No fatigue)–10 (Worst possible fatigue)
13. During the past 24 h, at its worst, how much embarrassment did you feel as a result of your psoriasis? 0 (No feelings of embarrassment)–10 (Worst possible feelings of embarrassment)
14. During the past 24 h, at its worst, how much did your psoriasis impact your choice of clothing? 0 (No impact on my choice of clothing)–10 (Completely impacted my choice of clothing)