Table 7.

Significance of the increase in performance for in-training operators

Operator	ROC area—before	ROC area—after	χ 2	p
5th year with limited experience	0.7595	0.8523	4.4813	0.0343
2nd year experienced	0.8314	0.8617	0.9571	0.33
3rd year with limited experience	0.7389	0.8097	2.3377	0.12
1st year experienced	0.7500	0.8636	5.9586	0.0146