Socioeconomic Status as a Predictor of Obstructive Airway Disease–Related Hospitalization Across Models
| Income Quintile | Odds Ratio (95% Confidence Limit) | |||
|---|---|---|---|---|
| Model A | Model B | Model C | Model D | |
| Q1 (lowest) | 3.72a (2.81, 4.92) | 3.10a (2.33, 4.13) | 3.15a (2.35, 4.21) | 2.93a (2.19, 3.93) |
| Q2 | 2.61a (1.95, 3.50) | 2.45a (1.82, 3.30) | 2.61a (1.93, 3.53) | 2.51a (1.86, 3.40) |
| Q3 | 1.70a (1.24, 2.33) | 1.57a (1.14, 2.16) | 1.60a (1.15, 2.21) | 1.54a (1.11, 2.13) |
| Q4 | 1.38 (0.99, 1.91) | 1.33 (0.95, 1.85) | 1.43a (1.02, 2.01) | 1.41a (1.01, 1.98) |
| Q5 (highest)b | 1.0 | 1.0 | 1.0 | 1.0 |
↵a P <.05.
↵b Reference group for odds ratio calculation.
Notes: model A = income quintile only; model B = income quintile + patient demographics; model C = income quintile + patient demographics + ambulatory care use; and model D = income quintile + patient demographics + ambulatory care use + usual physician characteristics.