Table 3.
Associations between type of insurance coverage and mortality among older ICU survivors
| Insurance | Commercial & Medicare | Medicare Only | Medicaid |
|---|---|---|---|
| Overall Mortality | |||
|
| |||
| Number of patients | 1,046 | 79 | 822 |
| Median follow-up time, years (IQR) | 1.6 (0.50–3.1) | 1.5 (0.13–2.5) | 1.5 (0.27–2.8) |
| Number of decedents | 493 | 44 | 455 |
| Person-Years | 1973 | 129 | 1423 |
| Mortality rate, per 100 person-years (95% CI) | 25.0 (22.9–27.3) | 34.0 (25.3–45.7) | 32.0 (29.2–35.0) |
| Unadjusted | 1 | 1.35 (0.99–1.84) | 1.26 (1.11–1.43) |
| Model 1: HR for death (95% CI) | 1 | 1.56 (1.13–2.15) | 1.51 (1.29–1.75) |
| Model 5: HR for death (95% CI) | 1 | 1.43 (1.03–1.98) | 1.30 (1.11–1.52) |
|
| |||
| Mortality Censored at 1 Year | |||
|
| |||
| Median follow-up time, years (IQR) | 1.0 (0.51–1.0) | 1.0 (0.13–1.0) | 1.0 (0.27–1.0) |
| Number of decedents | 344 | 35 | 318 |
| Person-Years | 809 | 53 | 586 |
| Mortality rate, per 100 person-years (95% CI) | 42.5 (38.3–47.3) | 66.4 (47.7–92.5) | 54.3 (48.6–60.6) |
| Unadjusted | 1 | 1.53 (1.09–2.18) | 1.26 (1.08–1.46) |
| Model 1: HR for death (95% CI) | 1 | 1.73 (1.21–2.50) | 1.46 (1.21–1.75) |
| Model 5: HR for death (95% CI) | 1 | 1.47 (1.02–2.12) | 1.21 (1.00–1.46) |
|
| |||
| Mortality Conditioning on 1-Year Survival | |||
|
| |||
| Number of patients | 702 | 44 | 504 |
| Median follow-up time, years (IQR) | 1.5 (0.59–2.7) | 1.5 (0.82–2.7) | 1.4 (0.67–2.6) |
| Number of decedents | 149 | 9 | 137 |
| Person-Years | 1165 | 77 | 836 |
| Mortality rate, per 100 person-years (95% CI) | 12.8 (10.9–15.1) | 11.7 (6.1–22.5) | 16.4 (13.9–19.4) |
| Unadjusted | 1 | 0.91 (0.46–1.78) | 1.28 (1.01–1.61) |
| Model 1: HR for death (95% CI) | 1 | 1.14 (0.57–2.27) | 1.63 (1.23–2.16) |
| Model 5: HR for death (95% CI) | 1 | 1.23 (0.61–2.48) | 1.53 (1.14–2.04) |
IQR: Interquartile range; HR: Hazard Ratio; 95% CI: 95% Confidence Interval
Model 2 variables: age, gender, discharge year, strata for hospital.
Model 5 variables: age, gender, race/ethnicity, discharge year, primary discharge diagnosis of sepsis, acute stroke, hematologic malignancy, or solid malignancy, mechanical ventilation use and duration, hospital length of stay, Charlson comorbidity index, Do-Not-Resuscitate order, neighborhood median household income, with strata for site of hospitalization, admission from a skilled-care facility, and discharge to a skilled-care facility.