Roles in Kayoino-ba and their relationship with Ikigai, functional ability, and frailty in older adults.

Everyone was measured on a single occasion, so the study shows that roles and better scores go together and says nothing about which came first. Healthier people may be the ones who take on roles. Only 20 of the 103 invited groups took part, everyone came from one city and had to consent, and the authors say this probably skews the sample towards people who already pay attention to their health. What counts as a role depends on the type of activity and how each group is run, and the study only counted roles held inside these groups, not roles people had elsewhere. Measurements were taken at each group's own venue, where flooring and footwear varied, so some differences between venues could come from how the tests were done rather than from the people themselves. Very few participants were actually frail (17 of 265), so the frailty comparison rests on small numbers.

Funded by special research grants from Tohto University and Shizuoka Sangyo University. The authors declare no conflicts of interest, and no company selling a treatment is named.

Do not read this as evidence that giving an older adult a role in a community group will make them healthier. Everyone was measured at one point in time, so the study cannot tell whether the role came before the better function or the other way round. The adjusted odds ratio also ranged from 1.12 to 45.52, which is very imprecise.