Fig. 1From: Road traffic noise and registry based use of sleep medicationAssociations between nighttime road traffic noise and sleep medication use by 5Â dB increase in noise level. All models are adjusted for age, sex, educational level, household income, population density, marital status, alcohol use, smoking status, physical activity, night shift work, and rail traffic noise. The horizontal whiskers show ORs with 95% CIsBack to article page