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 Instrumental variable estimates of risk differences of postoperative pneumonia for patients treated with proton pump inhibitors compared with H2 receptor antagonists
| Model | Risk difference per 1000 patients (95% CI) |
|---|---|
| Crude model | 7.0 (0.2 to 13.9) |
| Age, sex, race, calendar year adjusted model | 8.2 (1.1 to 15.4) |
| Propensity score tenths adjusted model | 8.2 (0.5 to 15.9) |
