Table 4

Mean risk estimates of operative mortality for patients who died (6.1%) and those who survived based on the 121 cases constructed with real patient data

ModelSurgeon 1Surgeon 2Surgeon 3Surgeon 4All 4 surgeons
**Significant differences between the categories `patients died' and `patient survived' for the model: t (119) = 3.29, p<0.001 and for surgeon 1 t (116) = 5.1, p<0.001, surgeon 2 t (119) = 2.38, p<0.05, surgeon 3 t (118) = 5.83, p<0.001, and surgeon 4 t (119) = 2.78, p<0.01.
Patients died17.8**9.3**8.2**10.0**19.5**11.8
Patients survived4.9**6.4**6.3**5.8**8.8**6.8
All patients5.66.66.46.09.37.1