| | Variable | Male | Female | Total | | % | | % |
| | Number of patients | 8,947 | 56.6 | 6,847 | 43.4 | 15,794 | | Ethnicity | | | | | | | Malay | 4,083 | 45.6 | 3,885 | 56.7 | 7,968 (50.5%) | | Chinese | 2,164 | 24.2 | 1,215 | 17.7 | 3,379 (21.4%) | | Indian | 1,779 | 19.9 | 994 | 14.6 | 2,773 (17.6%) | | Others | 922 | 10.3 | 753 | 11.0 | 1,669 (10.6%) | | Mean age of onset of psoriasis | 37.09 ± 15.51 | 32.59 ± 16.64 | 35.14 ± 16.16 | | Positive family history | 1,926 | 21.5 | 1,737 | 25.4 | 3,663 (23.1%) | | Types of psoriasis | | | | | | | Plaque psoriasis | 7,696 | 86.0 | 5,752 | 84.0 | 13,448 (85.1%) | | Guttate psoriasis | 240 | 2.7 | 216 | 3.2 | 456 (2.9%) | | Erythrodermic psoriasis | 182 | 2.0 | 85 | 1.2 | 267 (1.7%) | | Pustular psoriasis | 50 | 0.6 | 105 | 1.5 | 155 (1.0%) | | Flexural psoriasis | 24 | 0.3 | 43 | 0.6 | 67 (0.4%) | | Palmoplantar nonpustular psoriasis | 36 | 0.4 | 23 | 0.3 | 59 (0.4%) | | Severity of psoriasis | | | | | | | BSA < 5% | 1,029 | 25.9 | 801 | 24.4 | 1,826 (25.2%) | | BSA 5–10% | 1,882 | 47.5 | 1,843 | 56.0 | 3,725 (51.4%) | | BSA > 10–90% | 972 | 24.5 | 600 | 18.2 | 1,572 (21.7%) | | BSA > 90% | 86 | 2.2 | 45 | 1.4 | 131 (1.8%) | | Nail involvement | | | | | | | Yes | 5,549 | 62.0 | 3,463 | 50.6 | 9,012 (57.1%) | | Pitting | 4,025 | 72.5 | 2,429 | 70.1 | 6,519 (72.3%) | | Onycholysis | 2,792 | 50.3 | 1,561 | 45.1 | 4,353 (48.3%) | | Nail discolouration | 1,783 | 32.1 | 870 | 25.1 | 2,653 (29.4%) | | Subungual hyperkeratosis | 816 | 14.7 | 316 | 9.1 | 1,132 (12.6%) | | Total nail dystrophy | 333 | 6.0 | 102 | 2.9 | 435 (4.8%) | | No | 3,091 | 34.5 | 3,135 | 45.8 | 6,226 (39.4%) | | Joint involvement | | | | | | | Yes | 1,053 | 11.8 | 1,115 | 16.3 | 2,168 (13.7%) | | Oligo/monoarthropathy | 407 | 38.7 | 414 | 37.1 | 821 (37.9%) | | Symmetrical polyarthropathy | 286 | 27.2 | 378 | 33.9 | 664 (30.6%) | | Distal hand joint arthropathy | 301 | 28.6 | 340 | 30.5 | 641 (29.6%) | | Spondylitis/sacroiliitis | 89 | 8.5 | 71 | 6.4 | 160 (7.4%) | | Arthritis mutilans | 39 | 3.7 | 22 | 2.0 | 61 (2.8%) | | No | 7,573 | 84.6 | 5,503 | 80.4 | 13,076 (82.8%) | | Comorbidities | | | | | | | Obese (BMI > 30) | 1,642 | 20.8 | 1,735 | 28.9 | 3,377 (24.3%) | | Hypertension | 2,535 | 28.3 | 1,750 | 25.6 | 4,285 (25.6%) | | Hyperlipidemia | 1,817 | 20.3 | 1,195 | 17.5 | 3,012 (18.0%) | | Diabetes mellitus | 1,713 | 19.1 | 1,179 | 17.2 | 2,892 (17.2%) | | Ischaemic heart disease | 698 | 7.8 | 203 | 3.0 | 901 (5.4%) | | Cerebrovascular disease | 192 | 2.1 | 78 | 1.1 | 270 (1.6%) |
| | Mean DLQI | 8.8 ± 6.6 | 8.2 ± 6.6 | 8.5 ± 6.6 |
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