Fig. 2
The correlation between outdoor light time and incident dementia during follow-up. The hazard ratio for dementia with the corresponding 95% confidence interval as a function of outdoor light time from Cox proportional hazard regression models adjusted for age, sex, education, skin color, use of sun/UV protection, employment status, sleep duration, PM2.5, fracture history, vitamin D supplement, hearing loss, smoking status, alcohol use, CVD, TPA, and BMI. Abbreviation: CVD cardiovascular disease, UV ultraviolet radiation, TPA total physical activity, BMI body mass index