PV 在气候炎热潮湿的地带最为常见,这些地方的患病率可能高达 50%。[6]Gupta AK, Bluhm R, Summerbell R. Pityriasis versicolor. J Eur Acad Dermatol Venereol. 2002;16:19-33.http://www.ncbi.nlm.nih.gov/pubmed/11952286?tool=bestpractice.com本病在温带也很常见,尤其在夏季,本病患者占皮肤科医生诊治患者数的 3%。[1]Schwartz RA. Superficial fungal infections. Lancet. 2004;364:1173-1182.http://www.ncbi.nlm.nih.gov/pubmed/15451228?tool=bestpractice.com
斯堪的纳维亚和美国人群中 PV 患病率分别约为 1% 和 0.8%。[7]Faergemann J, Fredriksson T. Tinea versicolor with regard to seborrheic dermatitis: an epidemiological investigation. Arch Dermatol. 1979;115:966-968.http://www.ncbi.nlm.nih.gov/pubmed/157104?tool=bestpractice.com[8]Odland GF, Kraning KK. Prevalence, morbidity, and cost of dermatological diseases (editorial). J Invest Dermatol. 1979;73:395-401.http://www.jidonline.org/article/S0022-202X(15)45642-8/pdfhttp://www.ncbi.nlm.nih.gov/pubmed/501137?tool=bestpractice.com
PV 最常见于青少年和年青人中。[6]Gupta AK, Bluhm R, Summerbell R. Pityriasis versicolor. J Eur Acad Dermatol Venereol. 2002;16:19-33.http://www.ncbi.nlm.nih.gov/pubmed/11952286?tool=bestpractice.com本病幼儿和老人少见,因为在这些年龄组人群中,其皮脂产量较少。[6]Gupta AK, Bluhm R, Summerbell R. Pityriasis versicolor. J Eur Acad Dermatol Venereol. 2002;16:19-33.http://www.ncbi.nlm.nih.gov/pubmed/11952286?tool=bestpractice.com然而,在热带地区可见儿童病例,已经有早产 2 周的婴儿患病的报道,可能和恒温箱内湿热条件有关。[8]Odland GF, Kraning KK. Prevalence, morbidity, and cost of dermatological diseases (editorial). J Invest Dermatol. 1979;73:395-401.http://www.jidonline.org/article/S0022-202X(15)45642-8/pdfhttp://www.ncbi.nlm.nih.gov/pubmed/501137?tool=bestpractice.com老年患者多由住院期间炎热多汗的环境和免疫功能低导致的。[9]Wyre HW Jr, Johnson WT. Neonatal pityriasis versicolor. Arch Dermatol. 1981;117:752-753.http://www.ncbi.nlm.nih.gov/pubmed/7316542?tool=bestpractice.com随着免疫抑制剂广泛使用,有使用肿瘤坏死因子 (TNF)-α 抑制剂后继发的医源性免疫功能低下诱发的花斑癣病例的报道。[10]Balestri R, Rech G, Piraccini BM, et al. Pityriasis versicolor during anti-TNF-α monoclonal antibody therapy: therapeutic considerations. Mycoses. 2012;55:444-446.http://www.ncbi.nlm.nih.gov/pubmed/22283428?tool=bestpractice.com不同的研究中,男女感染率不同,但是总体上相近。[1]Schwartz RA. Superficial fungal infections. Lancet. 2004;364:1173-1182.http://www.ncbi.nlm.nih.gov/pubmed/15451228?tool=bestpractice.com