Table 2 Rate ratios (95% confidence intervals) for all-cause hospitalizations during 2-year follow-up period, by frailty/cognition status at baseline

Frailty Model

 Not Frail (Reference)

1.00

1.00

1.00

 Frail

1.70 (1.43,2.01)

1.42 (1.19,1.70)

1.24 (1.03,1.50)

Cognitive Impairment Model

 No Cognitive Impairment (Reference)

1.00

1.00

1.00

 Cognitively impaired (CI)

1.43 (1.26,1.63)

1.20 (1.04,1.39)

1.21 (1.04,1.39)

Combined Model

 Unimpaired (Reference)

1.00

1.00

1.00

 CI only

1.38 (1.20,1.59)

1.19 (1.02,1.38)

1.20 (1.03,1.40)

 Frailty only

1.61 (1.21,2.13)

1.39 (1.05,1.85)

1.23 (0.92,1.89)

 CI + Frailty

2.14 (1.73,2.64)

1.68 (1.32,2.13)

1.48 (1.16,1.89)