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Table 4 Correlation of model error terms “.e” for mortality, ventilation and HLOS

From: Modelling hospital outcome: problems with endogeneity

Correlation Estimate Robust SE z-value p-value 95%CI_lower 95%CI_upper
Ventilation.e vs mortality.e −0.248 0.085 −2.93 0.003 −0.405 −0.076
Log HLOS.e vs mortality.e −0.315 0.007 −45.50 0.000 −0.328 −0.301
Log HLOS.e vs ventilation.e 0.119 0.005 24.56 0.000 0.109 0.128