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Table 1 Characteristics of included studies in the present systematic review and meta-analysis. −, not reported

From: Global prevalence of hidradenitis suppurativa and geographical variation—systematic review and meta-analysis

First authorYearStudy periodCountryGeographical regionStudy sizeMalesFemales
Calao20182015–2016AustraliaAsia-Pacific11,43356165817
Cosmatos20132007USAUSA15,054,5197,233,8187,820,701
Delaney20172015IrelandEurope15,54715,47615,476
Garg20171999–2016USAUSA45,855,96020,832,51025,023,450
Ianhez20182017BrazilSouth America17,004
Ingram20172013UKEurope4,364,308
Jemec19961992–1993, 1994–1995DenmarkEurope585276231
Lee20182007–2016KoreaAsia-Pacific51,103,94325,573,93925,576,389
Lookingbill19881985–1986USAUSA1106
Reeder20142011–2012USAUSA8480
Revuz20082005FranceEurope6887
Richard20182016FranceEurope20,012976010,252
Riis20181995–2015DenmarkEurope27,76514,55812,238
Santos20172000–2014PortugalSouth America1,569,333
Shahi20141968–2008USAUSA139,28065,64971,240
Sung20132007–2011USAUSA563,931