Table 3.

Effect of Mobility Phenotype on Inpatient Health Care Utilization, Adjusted for Cognition and Other Prognostic Indicators

Phenotype*	Odds Ratio (95% CI) of Hospitalization	Rate Ratio (95% CI) of Inpatient Days Among Those Hospitalized	Mean Rate of Inpatient Days (95% CI; d/y)
Base model†
Good mobility (SPPB 10–12)	1.00 (referent)	1.00 (referent)	0.83 (0.49–1.23)
Intermediate mobility (SPPB 4–9)	1.55 (0.98–2.45)	1.72 (1.18–2.57)	2.00 (1.47–2.49)
Poor mobility (SPPB 0–3)	2.34 (1.38–3.95)	2.27 (1.44–3.73)	3.49 (2.25–5.04)
Base model† + cognition
Good mobility (SPPB 10–12)	1.00 (referent)	1.00 (referent)	0.88 (0.51–1.29)
Intermediate mobility (SPPB 4–9)	1.43 (0.90–2.27)	1.70 (1.17–2.56)	1.96 (1.44–2.48)
Poor mobility (SPPB 0–3)	2.02 (1.18–3.47)	2.14 (1.37–3.44)	3.16 (2.03–4.39)
Multivariable model‡
Good mobility (SPPB 10–12)	1.00 (referent)	1.00 (referent)	0.90 (0.50–1.33)
Intermediate mobility (SPPB 4–9)	1.37 (0.86–2.19)	1.70 (1.10–2.55)	1.94 (1.34–2.42)
Poor mobility (SPPB 0–3)	1.72 (0.98–3.01)	2.23 (1.31–3.59)	2.99 (1.77–4.02)
Multivariable model‡ + cognition
Good mobility (SPPB 10–12)	1.00 (referent)	1.00 (referent)	0.94 (0.52–1.45)
Intermediate mobility (SPPB 4–9)	1.27 (0.79–2.04)	1.71 (1.09–2.66)	1.92 (1.31–2.45)
Poor mobility (SPPB 0–3)	1.51 (0.85–2.69)	2.19 (1.37–3.66)	2.80 (1.64–3.89)

Notes: CI = confidence interval; SPPB = Short Physical Performance Battery.

*Among the cohort, there were 174 women with good mobility, 346 women with intermediate mobility, and 143 women with poor mobility.

^†Adjusted for age and site.

^‡Adjusted for age, site, race, health status, comorbidity burden, and hospitalization in the last year.