Table 4.
Effect of Cognition Phenotype on Inpatient Health Care Utilization, Adjusted for Mobility 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† | |||
| Normal cognition | 1.00 (referent) | 1.00 (referent) | 1.49 (1.06–1.93) |
| Mild cognitive impairment | 1.57 (1.02–2.42) | 0.96 (0.67–1.41) | 2.01 (1.27–2.77) |
| Dementia | 1.97 (1.27–3.07) | 1.43 (0.85–2.21) | 3.44 (2.02–5.13) |
| Base model† + mobility | |||
| Normal cognition | 1.00 (referent) | 1.00 (referent) | 1.59 (1.14–2.01) |
| Mild cognitive impairment | 1.49 (0.96–2.30) | 0.88 (0.62–1.27) | 1.88 (1.22–2.64) |
| Dementia | 1.74 (1.10–2.73) | 1.23 (0.76–1.81) | 2.89 (1.69–4.12) |
| Multivariable model‡ | |||
| Normal cognition | 1.00 (referent) | 1.00 (referent) | 1.51 (1.04–1.92) |
| Mild cognitive impairment | 1.56 (1.00–2.43) | 0.94 (0.64–1.38) | 1.96 (1.18–2.81) |
| Dementia | 1.73 (1.09–2.74) | 1.28 (0.81–1.84) | 2.86 (1.71–3.78) |
| Multivariable model‡ + mobility | |||
| Normal cognition | 1.00 (referent) | 1.00 (referent) | 1.59 (1.08–2.03) |
| Mild cognitive impairment | 1.51 (0.96–2.35) | 0.86 (0.57–1.33) | 1.85 (1.11–2.67) |
| Dementia | 1.62 (1.01–2.59) | 1.12 (0.71–1.65) | 2.53 (1.55–3.40) |
Notes: CI = confidence interval.
*Among the cohort, there were 381 women with normal cognition, 146 women with mild cognitive impairment, and 136 women with dementia.
†Adjusted for age and site.
‡Adjusted for age, site, race, health status, comorbidity burden, and hospitalization in the last year.