| | Characteristics () | Values |
| | Gender, (%) | | | Female | 38 (50.7%) | | Male | 37 (49.3%) | | Age (years), | | | Body mass index (kg/m2), | | | Duration of psoriasis (years), median (IQR) | 11.0 (7.0, 20.0) | | Psoriasis types, (%) | | | Plaque | 64 (85.3%) | | Guttate | 7 (9.3%) | | Erythrodermic | 3 (4.0%) | | Pustular | 1 (1.3%) | | Psoriatic arthritis, (%) | 13 (17.3%) | | Occupation, (%) | | | No increased risk of hand exposure to water† | 40 (53.3%) | | Increased risk of hand exposure to water‡ | 35 (46.7%) | | Patient right-handed, (%) | 68 (90.7%) | | Patient left-handed, (%) | 7 (9.3%) | | Handwashing frequency (times/day), median (IQR) | 6.0 (4.0, 10.0) | | Current psoriasis severity | | | Psoriasis Area and Severity Index score, median (IQR) | 5.0 (3.2, 10.2) | | Characteristics of fingernail pathologies () | Values | | Nail severity | | | Nail Psoriasis Severity Index score (0-8), median (IQR) | 4.0 (2.0, 4.0) | | Nijmegen-Nail Psoriasis Activity Index tool (0-15), median (IQR) | 4.0 (3.0, 5.0) | | Most severely affected fingernail, (%) | | | Thumb | 89 (59.3%) | | Index finger | 22 (14.7%) | | Middle finger | 16 (10.7%) | | Ring finger | 13 (8.7%) | | Little finger | 10 (6.7%) | | Nail matrix pathology, (%) | | | Pitting | 107 (71.3%) | | Leukonychia | 69 (46.0%) | | Crumbling | 55 (36.7%) | | Red spots lunula | 2 (1.3%) | | Nail bed pathology, (%) | | | Onycholysis | 137 (91.3%) | | Subungual hyperkeratosis | 53 (35.3%) | | Oil drop | 30 (20.0%) | | Splinter hemorrhage | 29 (19.3%) | | Beau lines, (%) | 19 (12.7%) | | Paronychial involvement, (%) | 73 (48.7%) |
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†Driver, lawyer, merchant, collegian, teacher, or retired. ‡Housekeeper, farmer, fisherman, mechanic, builder, or barber. Abbreviations: SD: standard deviation; IQR: interquartile range.
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