Table 3 Risk factors and the associated unadjusted hazard ratios for an adverse event (defined as non-independent living, hospital readmission, or death at follow up) using the Cox proportional-hazards model.

Age (years)

1.05 (1.00, 1.11)

0.05

Male sex

0.97 (0.54, 1.74)

0.92

Married

0.89 (0.48, 1.63)

0.69

Independent living before hospitalization

0.56 (0.30, 1.05)

0.07

Number of medications at admission

0.99 (0.89, 1.09)

0.80

Higher cumulative illness rating scale score

1.03 (0.96, 1.10)

0.46

Higher geriatric prognostic index score

1.01 (0.89, 1.16)

0.86

Higher clinical frailty scale score at baseline

1.25 (0.88, 1.79)

0.22

Higher clinical frailty scale score at 3 months

1.25 (0.59, 2.64)

0.56

More independent ADL

0.92 (0.52, 1.64)

0.78

Higher mini-mental state examination score

0.91 (0.85, 0.98)

0.01

Higher geriatric depression scale score

1.08 (0.98, 1.20)

0.14

Time to complete timed up and go test (seconds)*

1.28 (1.03, 1.59)

0.03

Higher balance test score while standing with 2 feet

0.86 (0.67, 1.10)

0.23