TABLE 3.
Univariate analysis of predictors for chronic obstructive pulmonary disease (COPD)
| Predictor | OR (95% CI) | P | P (global) |
|---|---|---|---|
| Age, years | |||
| <55 | 0.30 (0.17–0.54) | <0.0001 | |
| 55–64 (reference) | 1.00 | ||
| 65–74 | 0.69 (0.46–1.02) | 0.0636 | |
| ≥75 | 0.42 (0.29–0.61) | <0.0001 | <0.0001 |
| Male sex | 1.33 (1.06–1.66) | 0.0133 | 0.0133 |
| Length of stay, days | |||
| ≤7 (reference) | 1.00 | ||
| >7 | 1.05 (0.84–1.32) | 0.65 | 0.65 |
| Attending physician | |||
| Pulmonologist (reference) | 1.00 | ||
| General practitioner | 0.36 (0.25–0.52) | <0.0001 | |
| Other specialist | 0.40 (0.24–0.66) | 0.0004 | <0.0001 |
| Hospital volume* | |||
| 10–68 (reference) | 1.00 | ||
| 69–128 | 1.21 (0.69–2.14) | 0.51 | |
| 129–260 | 1.17 (0.69–2.00) | 0.56 | |
| ≥261 | 1.02 (0.62–1.70) | 0.93 | 0.64 |
| Hospital | |||
| Nonteaching (reference) | 1.00 | ||
| Teaching | 1.87 (1.41–2.48) | <0.0001 | <0.0001 |
*
Discharges (n) per hospital with a principal diagnosis of COPD