“…As for social network, the number of components (number of the elder's family members and number of friends and relatives to whom the elder feels close) 5,6,7,8 , number of components in the family network (spouse, children, and siblings) 9 , limited diversity in social relations (number of categories with which the elder has contact, such as children, grandchildren, siblings, other relatives, and friends) 10 , limited social participation (social activities outside the home and visits to others) 9,11,12 , as well as less contact with family members 5 and friends 8,13 to whom the elder feels close showed independent associations with future functional limitation. As for social support, dissatisfaction with social support 4,10 , perception of receiving little social support 14 , and large instrumental support (specific assistance such as provision of material needs in general and help with practical tasks such as house-cleaning, preparing meals, and provision of transportation) 7,10 have been described as determinants of worse functional performance, even after adjusting for other relevant factors.…”