Fig. 1From: Potential causal effect of physical activity on reducing the risk of dementia: a 6-year cohort study from the Japan Gerontological Evaluation StudyStudy sites and the average of the deepest snow cover. The averages of the deepest snow cover of habitable areas were indicated for each study site, while the gradation was generated based on a deepest snow cover including inhabitable areas. Hence, the values of the average and legends do not match in some sitesBack to article page