The association between Herpes simplex virus type 2 and asthma: A cross-sectional study from National Health and Nutrition Examination Survey 1999-2016

BackgroundThe association between Herpes simplex virus type 2 (HSV-2) infection, a common infectious disease that increases the incidence of multisystem diseases, and asthma was less well studied. The aim of this study was to investigate the association between HSV-2 infection and the prevalence of asthma. Materials and methodsWe used data from National Health and Nutrition Examination Survey (NHANES) 1999-2016 for analysis. The study population included was limited to those aged 20-45 years and contained complete information on HSV-2 infection and asthma. We calculated the prevalence of HSV-2, asthma, and HSV-2 combined with asthma separately. The association between HSV-2 infection and asthma was analyzed using multiple logistic regression. We also performed stratified analyses to reduce bias and to find sensitive cohorts. ResultsThe prevalence of HSV-2 infection was decreasing with change in time period (P for trend < 0.01), but the prevalence of asthma was increasing (P for trend < 0.01). The prevalence of HSV-2 infection was higher in those with asthma than in non-asthma participants. A positive association was found between HSV-2 infection and asthma [odds ratio (OR) = 1.15, 95% CI: 1.04-1.27]. Subgroup analysis showed that this positive association was more pronounced in participants who were male, White, 30 years <= age <= 40 years, body mass index (BMI) <= 28 kg/m(2), 1.39 <= ratio of family income to poverty (PIR) < 3.49 and smokers. ConclusionThere was a positive association between HSV-2 infection and asthma, and participants who were male, White race, 30 years <= age < 40 years, BMI >= 28 kg/m(2), 1.39 <= PIR < 3.49, and smokers should receive more attention.