Relationship of visual impairment (VI) with the likelihood of having difficulties in managing stairs.

OR = odds ratio; CI = confidence interval. Factors adjusted for in each model: Model 1: age and gender; Model 2: age, gender, educational level; monthly income, and living alone or not; Model 3: age, gender, educational level; monthly income, living alone or not, smoking, alcohol intake, tea consumption, and sleeping hours per dayRelationship of visual impairment (VI) with the likelihood of having difficulties in managing stairs.