Epidemiology and treatment of psoriasis: a Chinese perspective

Figures & data

Table 1 Prevalence of psoriasis in the People’s Republic of China

Region	Year	Method	Subjects	Prevalence (%)	Reference
Xinjiang	1978	Clinical database	18,498	0.18	8
Mainland	1984	Questionnaire	5,742,066	0.12	9
Anhui	2001	Questionnaire	92,857	0.11	10
Six cities	2012	Clinical examination	17,345	0.47	11
Hainan	2013	Questionnaire	30,935	0.14	12

Table 2 Different types of psoriasis identified in Chinese and Japanese studies

Region/country	Year	Psoriasis vulgaris (%)	Pustular psoriasis (%)	Psoriasis arthropathica (%)	Erythrodermic psoriasis (%)	Reference
People’s Republic of China	1984	97.9	0.69	0.69	0.58	9
Six Chinese cities	2012	97.06	0.98	1.96	0	11
Hainan, People’s Republic of China	2013	82.61	2.17	6.52	8.7	12
Japan	2003	86.0	1.4	1.0	0.8	18
Japan	2009	91.5	0.75	2.8	0.6	19

Table 3 Percentage of psoriasis arthropathica in different studies

Country	Percentage (%)	Reference
Europe and North America	30	20
Korea	9	21
Iran	9	22
Turkey	2	23
Japan	1–2.8	18,19
People’s Republic of China	0.69–6.52	9,11,12