Table 4 Rate ratios (95% confidence intervals) for direct-admission hospitalizations during 2-year follow-up period, by frailty/cognition status at baseline
| Â | Analytic Model 1a | Analytic Model 2b | Analytic Model 3c |
|---|---|---|---|
Frailty Model | |||
 Not Frail (Reference) | 1.00 | 1.00 | 1.00 |
 Frail | 1.51 (0.98,2.32) | 1.42 (0.88,2.28) | 1.22 (0.78,1.90) |
Cognitive Impairment Model | |||
 No Cognitive Impairment (Reference) | 1.00 | 1.00 | 1.00 |
 Cognitively impaired (CI) | 1.26 (0.98,1.60) | 1.17 (0.88,1.56) | 1.18 (0.88,1.59) |
Combined | |||
 Unimpaired (Reference) | 1.00 | 1.00 | 1.00 |
 CI only | 1.32 (1.02,1.70) | 1.26 (0.94,1.69) | 1.28 (0.95,1.72) |
 Frailty only | 2.02 (1.13,3.61) | 1.98 (1.10,3.55) | 1.69 (0.97,2.96) |
 CI + Frailty | 1.34 (0.72,2.51) | 1.20 (0.58,2.52) | 1.04 (0.50,2.17) |