Epidemiology of moderate-to-severe plaque psoriasis in a Canadian surveyed population

limited data are available on the epidemiologic features of psoriasis in Canada.

to investigate the epidemiologic features and burden of moderate-to-severe psoriasis in a Canadian population.

an online survey was conducted using a consumer panel. Eligible respondents indicated a diagnosis of psoriasis and plaque-type psoriasis of at least moderate severity. Eligibility was validated according to self-reported body surface area (BSA) involvement, sensitive areas affected, and/or current treatment.

of the 514 respondents who completed the survey, 62% estimated a BSA involvement of >/= 3% within the past 5 years. Onset of psoriasis occurred earlier in females than in males. Nail involvement was more commonly reported in individuals with psoriatic arthritis compared to those without. Several symptoms were more likely described as "constantly" or "near constantly" experienced by females than by males. Comorbidities commonly reported were hypertension, dyslipidemia, and overweight or obesity.

the findings are consistent with a substantial burden attributed to moderate-to-severe plaque psoriasis in a Canadian population.