18Apr 2022
Prevalence and incidence of generalized pustular psoriasis in Sweden: a population‐based register study

Prevalence and incidence of generalized pustular psoriasis in Sweden: a population‐based register study

Generalized pustular psoriasis (GPP) is a severe form of pustular psoriasis with the generalized eruption of sterile pustules, often along with systemic symptoms. Unfortunately, there is a scarcity of population‐based estimates of GPP prevalence and incidence. Therefore, the study aimed to estimate (i) the prevalence and incidence of GPP in the Swedish general population and (ii) the prevalence of psoriasis vulgaris within the GPP population. Among the GPP population, 43% also had a psoriasis vulgaris code. Therefore, the incidence of GPP in 2015 was estimated at 0.82 per 100 000 (women, 0.93; men, 0.74). The criteria used impacted prevalence and incidence estimates: strict prevalence case 1 gave 3.8 per 100 000 and incidence strict case 1 gave 0.42 per 100 000. Results indicate that the estimated GPP population in Sweden is within the range of previous published estimates. However, estimates were sensitive to the GPP case criteria used. The findings enhance demands for studies using validated diagnostic algorithms.

  • #dermatology

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