Table 8 Two-stage least squares estimates for outcomes with complete case data, adjusted for measured and unmeasured characteristics
90-day readmission | Barthel index at discharge | Log-transformed length of stay | ||||
|---|---|---|---|---|---|---|
Coefficient (95% CI) | P value | Coefficient (95% CI) | P value | Coefficient (95% CI) | P value | |
Ordinary least square; | −0.0348 (−0.0561, −0.0135) | 0.0014 | −0.0009 (−0.0204, 0.0187) | 0.9298 | −0.4134 (−0.4551, −0.3718) | < 0.0001 |
Two-stage least square | −0.039 (−0.1867, 0.1088) | 0.6052 | 0.0664 (−0.0796, 0.2125) | 0.3727 | −0.9087 (−1.1725, −0.6450) | < 0.0001 |
F statistics | 134.8 | < 0.0001 | 117.2 | < 0.0001 | 134.8 | < 0.0001 |
Hausman specification test | 0.956 | 0.339 | < 0.0001 | |||