Table 3. Multivariable regression for mortality with weekend as predictor variable, controlling for other covariates.
| Variables | OR (95% CI) | P |
|---|---|---|
| Weekend | 1.06 (1.01-1.10) | 0.009 |
| Age category | <0.001 | |
| 18-34 y | 1.00 (reference) | |
| 35-49 y | 1.66 (1.51-1.82) | |
| 50-64 y | 2.75 (2.51-3.01) | |
| 65-79 y | 4.34 (3.97-4.76) | |
| ≥80 y | 6.24 (5.69-6.85) | |
| Sex | <0.001 | |
| Male | 1.00 (reference) | |
| Female | 0.93 (0.91-0.95) | |
| Race | <0.001 | |
| Caucasian | 1.00 (reference) | |
| African American | 0.80 (0.77-0.83) | |
| Hispanic | 0.76 (0.72-0.79) | |
| Asian or Pacific Islander | 0.85 (0.78-0.92) | |
| Native American | 0.81 (0.68-0.95) | |
| Other | 0.90 (0.83-0.97) | |
| Missing | 0.93 (0.88-0.98) | |
| Primary Payer | <0.001 | |
| Medicare | 1.00 (reference) | |
| Medicaid | 1.02 (0.96-1.08) | |
| Private | 1.18 (1.12-1.24) | |
| Self-Pay | 1.44 (1.25-1.64) | |
| No Charge | 0.71 (0.29-1.73) | |
| Other | 1.51 (1.28-1.77) | |
| Modified Charlson's Index | <0.001 | |
| 0 | 1.00 (reference) | |
| 1-3 | 0.95 (0.92-0.98) | |
| 4-6 | 1.46 (1.39-1.54) | |
| ≥7 | 2.33 (2.18-2.50) | |
| Hospital Teaching Status | ||
| Non-Teaching | 1.00 (reference) | 0.7 |
| Teaching | 1.01 (0.96-1.06) | |
| Bed Size | 0.2 | |
| Small | 1.00 (reference) | |
| Medium | 0.92 (0.85-1.00) | |
| Large | 0.93 (0.86-1.01) | |
| Region of Hospital | <0.001 | |
| North East | 1.00 (reference) | |
| Mid-West | 0.82 (0.77-0.88) | |
| South | 0.96 (0.90-1.03) | |
| West | 0.98 (0.92-1.05) | |
| Year | 0.98 (0.97-0.99) | <0.001 |
| Primary diagnosis | ||
| Infections & access issues | 2.00 (1.94-2.07) | <0.001 |
| Cardiovascular diseases | 1.05 (1.01-1.10) | 0.02 |
| Gastrointestinal bleed | 0.80 (0.72-0.90) | <0.001 |
| Other | 0.34 (0.29-0.38) | <0.001 |
| Interactions with weekend admission | ||
| Cardiovascular diseases | 0.93 (0.86-0.99) | 0.03 |
| Hospital Teaching Status | 1.08 (1.02-1.14) | 0.005 |
OR, odds ratio; CI, confidence interval;