Prevalence of chloasma among community residents in Langfang region of Hebei province

Objective To explore the prevalence and influencing factors of chloasma among residents in Langfang region.Methods We conducted a household survey including questionnaire interview and skin examination among 3 596 residents recruited from four communities in Langfang region of Hebei province,China with cluster random sampling between March and May 2013.Results Of all the participants,124 were detected with chloasma,with an overall prevalence of 3.4% and a standardized prevalence of 4.3%.The prevalence of cholsma differed by gender,marital status,occupation,education level,personality,life stress,and dietary behaviors,with higher prevalences among the females than the males (7.0% vs.0.3%,P<0.05),the scientific research personnel (10.8%,50/463) than other occupations (P<0.05),the participants with the education of technical secondary school or above than with lower education,the participants with introvert personality or depression symptoms (8.8%,19/217) than with calm personality(2.7%,63/2 323),the participants with heavy perceived life stress (7.2%,43/594) than with minor perceived life stress (1.4%,14/1 034),and the participants with preference for greasy,spicy and sweet food (4.0%,94/2 346) than without the preference (2.5%,30/1 215),respectively.The results of logistic regression analysis demonstrated that female gender (odds ratioOR=23.203,P<0.001),married (OR=17.265,P<0.001),introvert personality or depression symptoms (OR=3.261,P<0.001),preference for greasy,spicy and sweet food (OR=1.557,P=0.054),and heavy perceived life stress (OR=1.529,P=0.006) were risk factors for chloasma;whereas age was a protective factor for chloasma (OR=0.808,P=0.034).Conclusion Gender age,marital status,personality,occupation,and life stress are main influencing factors of chlosma among community residents in Langfang.