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Table 7 Main effects parameter coefficients (dy/dx) for probit and eprobit

From: Modelling hospital outcome: problems with endogeneity

  Probit eProbit
dy/dx P-value 95% CI (lower) 95% CI (upper)  dy/dx P-value 95% CI (lower) 95% CI (upper) 
Age_centered 0.0001 0.5810 −0.0002 0.0004 0.0001 0.3890 −0.0002 0.0004
APIII score_centered 0.0002 0.1570 −0.0001 0.0004 0.0022 0.0000 0.0020 0.0025
Gender
 Female 0.0000     0.0000    
 Male 0.0001 0.9700 −0.0029 0.0030 0.0000 0.9810 − 0.0026 0.0026
AP III diagnostic codes
 Cardiovascular_medical 0.0000     0.0000    
 Respiratory medical −0.0056 0.0330 −0.0107 − 0.0005 0.0038 0.4040 −0.0052 0.0128
 Liver_GIS_medical −0.0025 0.5190 −0.0100 0.0050 −0.0166 0.0120 −0.0296 −0.0036
 CNS_medical 0.0123 0.0000 0.0063 0.0183 −0.0030 0.6480 −0.0158 0.0098
 Sepsis −0.0103 0.0000 −0.0156 −0.0050 − 0.0128 0.1330 − 0.0296 0.0039
 Trauma 0.0050 0.2280 −0.0031 0.0132 −0.0213 0.0180 −0.0388 −0.0037
 Metabolic Hormonal 0.0006 0.9110 −0.0107 0.0120 −0.1066 0.0000 −0.1178 −0.0955
 Haematologic −0.0065 0.4590 −0.0237 0.0107 0.0352 0.2230 −0.0214 0.0918
 Renal_GUS −0.0244 0.0000 −0.0349 −0.0140 − 0.0839 0.0000 − 0.0975 −0.0702
 Other medical disorders 0.0142 0.3020 −0.0128 0.0413 −0.0472 0.0070 −0.0815 −0.0130
 Musculoskeletal / Skin −0.0074 0.5730 −0.0329 0.0182 −0.0583 0.0000 −0.0879 −0.0287
 Cardio-Vascular surgery −0.0006 0.9070 −0.0103 0.0091 −0.0710 0.0000 −0.0875 −0.0545
 Thoracic surgery 0.0264 0.0070 0.0071 0.0457 −0.0536 0.0000 −0.0742 −0.0329
 GIS surgery −0.0015 0.6730 −0.0085 0.0055 −0.0481 0.0000 −0.0615 −0.0346
 CNS surgery 0.0141 0.0150 0.0027 0.0254 0.0168 0.1070 −0.0036 0.0373
 Traumatic/Orthopaedic surgery 0.0004 0.9470 −0.0107 0.0114 −0.0475 0.0000 −0.0664 −0.0286
 Renal_GUS surgery −0.0176 0.1000 −0.0387 0.0034 −0.0998 0.0000 −0.1148 −0.0848
 Gynaecological 0.0834 0.0540 −0.0014 0.1681 −0.1142 0.0000 −0.1380 −0.0904
 Musculoskeletal / Skin Surgery 0.0004 0.9530 −0.0138 0.0147 −0.0672 0.0000 −0.0814 −0.0530
 Metabolic Surgery 0.0427 0.2800 −0.0348 0.1201 −0.0854 0.0000 −0.1286 −0.0421
 Cardiovascular surgery elective −0.0073 0.1330 −0.0168 0.0022 −0.1179 0.0000 −0.1302 −0.1056
 Thoracic surgery elective −0.0074 0.5570 −0.0320 0.0172 −0.0839 0.0000 −0.1056 −0.0622
 GIS surgery elective −0.0179 0.0040 −0.0300 −0.0059 − 0.0885 0.0000 − 0.0998 −0.0771
 CNS surgery elective 0.0227 0.0980 −0.0042 0.0496 −0.0685 0.0000 −0.0916 −0.0453
 Traumatic/Orthopaedic surgery el −0.0345 0.1880 −0.0857 0.0168 −0.0946 0.0000 −0.1302 −0.0591
 Renal_GUS surgery elective 0.0220 0.2250 −0.0135 0.0575 −0.0972 0.0000 −0.1185 −0.0760
 Gynaecological surgery elective −0.0491 0.1040 −0.1084 0.0101 −0.1264 0.0000 −0.1414 −0.1114
 Musculoskeletal / Skin Surgery el −0.0058 0.5760 −0.0262 0.0146 −0.0982 0.0000 −0.1151 −0.0813
Annual volume_deciles
 Base 0.0000     0.0000    
 2 0.0016 0.6740 −0.0058 0.0090 0.0010 0.7740 −0.0058 0.0077
 3 0.0092 0.0180 0.0016 0.0167 0.0064 0.0690 −0.0005 0.0134
 4 0.0017 0.7270 −0.0080 0.0114 0.0085 0.1110 −0.0020 0.0190
 5 −0.0008 0.8430 −0.0090 0.0074 0.0023 0.5740 −0.0057 0.0104
 6 0.0047 0.2750 −0.0038 0.0133 0.0050 0.2680 −0.0038 0.0138
 7 0.0032 0.4300 −0.0048 0.0112 0.0129 0.0040 0.0042 0.0217
 8 0.0020 0.6310 −0.0063 0.0104 0.0066 0.1300 −0.0020 0.0152
 9 −0.0030 0.5860 −0.0139 0.0078 −0.0042 0.4180 −0.0145 0.0060
 10 −0.0047 0.2280 −0.0125 0.0030 −0.0022 0.6290 −0.0112 0.0068
Hospital classification
 Metropolitan 0.0000     0.0000    
 Private 0.0145 0.0000 0.0089 0.0201 0.0124 0.0000 0.0071 0.0178
 Rural / Regional 0.0034 0.2420 −0.0023 0.0092 0.0062 0.0260 0.0007 0.0117
 Tertiary 0.0164 0.0000 0.0120 0.0209 0.0117 0.0010 0.0049 0.0184
Ventilation status
 Not-ventilated 0.0000     0.0000    
 Ventilated −0.0058 0.0010 −0.0093 −0.0023 0.0309 0.0710 −0.0026 0.0645