Additional file 1: Table S1. of Which type of social activities may reduce cognitive decline in the elderly?: a longitudinal population-based study

Baseline characteristics of the sample based on age group. Table S2. Cognitive decline 4 years later among study population. Table S3. Percentage of cognitive decline 4 years later among study population. Table S4. Participation in formal social activities according to subject’s characteristics at baseline. Table S5. Correlations of the study variables for total sample. Table S5–1. Correlations of the study variables for Y-O adults. Table S5–2. Correlations of the study variables for O-O adults. Table S6. Variance inflation factors (VIF) of the study variables for multicollinearity. Table S7. Multivariate linear regression analysis of the associations between social activities and cognitive decline 4 years later. (DOCX 56 kb)