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Table 4 Ordinary least square and two-stage least square estimates of the outcomes with multiple imputation

From: Outcomes after early and delayed rehabilitation for exacerbation of chronic obstructive pulmonary disease: a nationwide retrospective cohort study in Japan

  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 −0.021 (−0.036, −0.005) 0.0092 −0.009 (−0.025, 0.007) 0.2644 −0.424 (−0.463, −0.386) <0.0001
Two-stage least square −0.053 (−0.159, 0.053) 0.3269 0.059 (−0.057, 0.174) 0.3188 −0.934 (−1.156, −0.712) <0.0001
F statistics 247.8 <0.0001 247.8 <0.0001 247.8 <0.0001
Hausman specification test   0.559   0.217   <0.0001
  1. CI confidence interval