Table 1

Baseline characteristics of physicians with different specialties

CharacteristicsEmergency physicians (N=1584)Surgeons (N=12 103)Radiologists/pathologists (N=2979)p Value
Men, n (%)1473 (93.0)11 347 (93.8)2308 (77.5)<0.0001
Age (years), n (%) <0.0001
 <35958 (60.5)6842 (56.5)1889 (63.4)
 35–45530 (33.5)3501 (28.9)774 (26.0)
 ≥4596 (6.0)1760 (14.6)316 (10.6)
 Mean (SD)34.7 (5.5)37.2 (8.5)35.9 (8.4)
Observed person-years54 51.3124 483.128 580.3NA
Failure, n (%)10 (0.63)1298 (10.7)87 (2.9)<0.0001*
Attrition rate (per 1000 person-year)1.8310.423.04<0.0001