Table 2 Linear mixed-effects model of frailty (N = 1601).
Variable | Null model | Random intercept model |
|---|---|---|
Beta(β) | ||
Fixed effects | ||
Intercept | 21.29** | − 19.39** |
Time | 0.54** | |
Baseline age | 0.48** | |
Male (ref. female) | − 0.06 | |
Married (ref. unmarried) | − 0.42 | |
High school or higher (ref. middle school or lower) | − 0.33 | |
Baseline prefrail (ref. robust) | 6.06** | |
Baseline frail (ref. robust) | 15.36** | |
Fall experience (ref. none) | 1.97** | |
Activity limitation due to the fear of falling (ref. none) | 4.62** | |
Time × activity limitation due to the fear of falling | 0.42** | |
Random effects | ||
Intercept | 72.53 | 32.37 |
Residual | 67.60 | 51.27 |
Number of observations | 12,504 | 12,502 |
Number of individuals | 1601 | 1601 |
AIC | 91,754 | 87,579 |
BIC | 91,777 | 87,675 |
