TABLE 5.
Subgroup analysis of the association between frailty and incidence of depressive symptoms according to the place of residence.
| HR (95% CI) |
P interaction | Per SD increase | P interaction | ||
| Robust | Pre-frailty/frailty | ||||
| Frailty index | |||||
| Urban | 1 (reference) | 1.53 (1.21–1.94) | 0.37 | 1.37 (1.20–1.56) | 0.36 |
| Rural | 1 (reference) | 1.33 (1.14–1.55) | 1.25 (1.14–1.36) | ||
| Phenotypic frailty | |||||
| Urban | 1 (reference) | 1.35 (1.07–1.72) | 0.65 | 1.18 (1.02–1.36) | 0.80 |
| Rural | 1 (reference) | 1.28 (1.10–1.50) | 1.18 (1.08–1.29) | ||
CI, confidence interval; HR, hazard ratio; SD, standard deviation. The model was adjusted for age, sex, education level, smoking status, alcohol consumption, marital status, income, participation in social activities, number of chronic diseases, retirement status, and sleep duration.