A research institute investigated the relationship between the frequency of laughter and health status of about 20,000 people over the age of 65  The results showed that the proportion of unsmiling elderly people who thought their current health was not so good and bad was 1 5 times and 1 8 times higher than that of laughing almost every day,respectively  Elderly people who love to laugh tend to have a higher evaluation of their health
Among the healthy elderly, the proportion of women who love to laugh is 10 percentage points higher than that of men.
 As a result, they think that elderly people who love to laugh are healthier