Table 3 Sensitivity analysis using differently defined instrumental variables
Instrumental Variable | Excess deaths per 100 patients | 95% confidence interval | No. of patients | F statistics |
|---|---|---|---|---|
In-hospital mortality | ||||
Previous patient’s CT performance | −13.5 | −40.2 to 13.3 | 5,230 | 48.8 |
Previous 5 patients’ CT performance | −2.4 | −18.7 to 13.8 | 4,783 | 151 |
Previous 7 patients’ CT performance | −3.9 | −19.3 to 11.4 | 4,548 | 187.5 |
24-h mortality | ||||
Previous patient’s CT performance | −13.7 | −37.3 to 9.9 | 5,000 | 48.6 |
Previous 5 patients’ CT performance | −10.2 | −25.1 to 4.6 | 4,572 | 155.1 |
Previous 7 patients’ CT performance | −14 | −28.3 to 0.0 | 4,349 | 188.5 |