This study also showed that the conditions of ADL, mental status and social relationship among elderly people of the non-diseased group were significantly better than those of the diseased group. The regression analysis showed a positive association between the level of self-perceived life enrichment and happiness and the absence of major NCDs. In addition, those who had a better memory were less likely to suffer from major NCDs. The increase in the psychological concentration was positively correlated with the increased likelihood of developing NCDs, and those who had a better relationship with their neighbours were more likely to suffer from major NCDs. Similarly, some studies on negative social exchange suggested that the presence of social relationships may actually add stress to a person’s life rather than reduce it, especially if the relationship is too demanding, insensitive and interfering, or if those with whom one is in contact suffer from serious problems of their ownucation among the elderly participants.