Table 4.
Unadjusted and multilevel models with random effects for relative risks and 95% CIs for association of ICE income + race measure and survival to discharge among Medicare beneficiaries
| Variable | ICE income + race model 1 unadjusted | ICE income + race model 2 (beneficiary) | ICE income + race model 3 (beneficiary + hospital) | |||
|---|---|---|---|---|---|---|
| RR | 95% CI | RR | 95% CI | RR | 95% CI | |
| ICE income + race Q1 (low-income Black) | Ref | Ref | Ref | Ref | Ref | Ref |
| ICE income + race Q2 | 1.16 | 1.11–1.21 | 1.12 | 1.06–1.16 | 1.09 | 1.04–1.15 |
| ICE income + race Q3 | 1.22 | 1.16–1.27 | 1.14 | 1.09–1.20 | 1.12 | 1.06–1.18 |
| ICE income + race Q4 | 1.16 | 1.11–1.21 | 1.08 | 1.03–1.14 | 1.08 | 1.02–1.13 |
| ICE income + race Q5 (high-income White) | 1.18 | 1.13–1.23 | 1.10 | 1.05–1.15 | 1.10 | 1.05–1.16 |
| Sex: female | – | – | Ref | Ref | Ref | Ref |
| Sex: male | – | – | 1.07 | 1.04–1.10 | 1.07 | 1.04–1.10 |
| Individual White race | – | – | Ref | Ref | Ref | Ref |
| Individual Black race | – | – | 0.85 | 0.82–0.89 | 0.86 | 0.82–0.90 |
| Age category 65–74 y | – | – | Ref | Ref | Ref | Ref |
| Age category 75–84 y | – | – | 0.90 | 0.88–0.93 | 0.90 | 0.88 |
| Age category 85 + y | – | – | 0.85 | 0.82–0.88 | 0.85 | 0.82 |
| Elixhauser AHRQ Comorbidity Index < 0 | – | – | Ref | Ref | Ref | Ref |
| Elixhauser AHRQ Index = 0 | – | – | 0.72 | 0.67–0.78 | 0.72 | 0.67–0.78 |
| Elixhauser AHRQ Index = 1–4 | – | – | 0.80 | 0.74–0.86 | 0.79 | 0.73–0.85 |
| Elixhauser AHRQ Index ≥ 5 | – | – | 0.62 | 0.59–0.64 | 0.63 | 0.60–0.66 |
| Hospital size: no. of beds < 100 | – | – | – | – | Ref | Ref |
| Hospital size: no. of beds > 100–399 | – | – | – | – | 0.86 | 0.80–0.93 |
| Hospital size: no. of beds ≥ 400 | – | – | – | – | 0.84 | 0.77–0.92 |
| Hospital teaching status: major academic teaching | – | – | – | – | Ref | Ref |
| Hospital teaching status: minor academic teaching | – | – | – | – | 1.05 | 1.0–1.11 |
| Hospital teaching status: non-teaching | – | – | – | – | 1.11 | 1.04–1.18 |
| Hospital medical intensive care unit beds (no) | – | – | – | – | Ref | Ref |
| Hospital medical intensive care unit beds (yes) | – | – | – | – | 0.92 | 0.85–1.01 |
| Hospital cardiac intensive care beds (CIC) (no) | – | – | – | – | Ref | Ref |
| Hospital cardiac intensive care beds (CIC) (yes/no) | – | – | – | – | 0.99 | 0.95–1.03 |
| Hospital cardiac catheterization availability (no) | – | – | – | – | Ref | Ref |
| Hospital cardiac catheterization availability (yes) | – | – | – | – | 1.13 | 1.07–1.20 |
Ref = Reference Category