Table 2.

Mean (SD) plaque psoriasis prevalence and disease severity estimates in adults from the broad dermatology survey and by expert elicitation

	Prevalence and severity estimates, mean (SD)
	National dermatologists (n = 80)	International dermatologists (n = 19)	Combined (n = 99)	Expert elicitation (n = 9)
Psoriasis prevalence (most likely)	3.56% (1.81)	2.59% (0.82)	3.37% (1.71)	Mean: 3.4% (95% confidence interval, 2.2–4.9%)
				Bayes: 3.0% (95% credibility interval, 2.7–3.3%)
≥ 10% BSA	24.53% (16.37)	25.42% (15.06)	24.71% (16.13)	21.8% (2.48)*
≥ 30% BSA	11.31% (10.81)	10.26% (9.52)	11.11% (10.59)	8.9% (1.33)*

*Obtained from summation of mean expert estimation of BSA, second round of estimation from Supplementary Table 3