Table 1: Patients’ characteristics at baseline.

VariableMaleFemaleTotal
%%

Number of patients8,94756.66,84743.415,794
Ethnicity
 Malay4,08345.63,88556.77,968 (50.5%)
 Chinese2,16424.21,21517.73,379 (21.4%)
 Indian1,77919.999414.62,773 (17.6%)
 Others92210.375311.01,669 (10.6%)
Mean age of onset of psoriasis37.09 ± 15.5132.59 ± 16.6435.14 ± 16.16
Positive family history1,92621.51,73725.43,663 (23.1%)
Types of psoriasis
 Plaque psoriasis7,69686.05,75284.013,448 (85.1%)
 Guttate psoriasis2402.72163.2456 (2.9%)
 Erythrodermic psoriasis1822.0851.2267 (1.7%)
 Pustular psoriasis500.61051.5155 (1.0%)
 Flexural psoriasis240.3430.667 (0.4%)
 Palmoplantar nonpustular psoriasis360.4230.359 (0.4%)
Severity of psoriasis
 BSA < 5%1,02925.980124.41,826 (25.2%)
 BSA 5–10%1,88247.51,84356.03,725 (51.4%)
 BSA > 10–90%97224.560018.21,572 (21.7%)
 BSA > 90%862.2451.4131 (1.8%)
Nail involvement
Yes5,54962.03,46350.69,012 (57.1%)
 Pitting4,02572.52,42970.16,519 (72.3%)
 Onycholysis2,79250.31,56145.14,353 (48.3%)
 Nail discolouration1,78332.187025.12,653 (29.4%)
 Subungual hyperkeratosis81614.73169.11,132 (12.6%)
 Total nail dystrophy3336.01022.9435 (4.8%)
No3,09134.53,13545.86,226 (39.4%)
Joint involvement
Yes1,05311.81,11516.32,168 (13.7%)
 Oligo/monoarthropathy40738.741437.1821 (37.9%)
 Symmetrical polyarthropathy28627.237833.9664 (30.6%)
 Distal hand joint arthropathy30128.634030.5641 (29.6%)
 Spondylitis/sacroiliitis898.5716.4160 (7.4%)
 Arthritis mutilans393.7222.061 (2.8%)
No7,57384.65,50380.413,076 (82.8%)
Comorbidities
 Obese (BMI > 30)1,64220.81,73528.93,377 (24.3%)
 Hypertension2,53528.31,75025.64,285 (25.6%)
 Hyperlipidemia1,81720.31,19517.53,012 (18.0%)
 Diabetes mellitus1,71319.11,17917.22,892 (17.2%)
 Ischaemic heart disease6987.82033.0901 (5.4%)
 Cerebrovascular disease1922.1781.1270 (1.6%)

Mean DLQI8.8 ± 6.68.2 ± 6.68.5 ± 6.6