Genital Psoriasis
Ooi Shin Yi, Khor Yek Huan, Loo Chai Har, Norazlima Mohd Ali, Tan Wooi Chiang
Abstract
Background: Genital psoriasis is often under-recognized and the exact burden is unknown in Malaysia. Objectives: To identify the prevalence of genital psoriasis, its clinical features, risk factors, and impact on quality of life and sexual health. Methods: This prospective, observational study was conducted in the dermatology clinic of our hospital from 1 st September 2020 until 31 st March 2021, involving all adult patients with psoriasis. The genital examination was performed and the subjects were interviewed using questionnaires. Results: A total of 262 patients were recruited, with a male to female ratio of 1.5:1 (mean age of 51 years old). They comprised 42.0% Chinese, followed by 36.6% of Malay, 21.4% of Indians and others. Up to 46.1% of patients had a current or history of genital psoriasis. The most common area involved for males was the scrotum (44.1%) and labia majora (62.5%) for female patients. Itching (79.2%) was the most frequent symptom encountered. Chinese patients had 2.67 times odd (CI 1.55-4.61) of having genital psoriasis compared to non-Chinese patients. Other independent risk factors included flexural involvement, male gender, and Type 1 psoriasis. Genital psoriasis was associated with greater impairment on quality of life and sexual health (mean total Dermatology Life Quality Index: 8.8 vs 6.5, P = 0.006), International Index of Erectile Function (mean: 48.5 vs 57.0, P = 0.011) and revised version of Female Sexual Distress Scales (mean: 20.7 vs 11.4, P = 0.022). Conclusions: Genital psoriasis is common and it has a profound impact on patients.