Table 2.

Effects of surgeon experience on outcome, separately by preoperative risk group. Probabilities are for a patient with typical cancer severity within each group (mean PSA, stage and grade) treated at the midpoint of the series. 95% confidence intervals for the absolute and relative differences are given in parentheses.

Analysis	Adjusted P value for surgeon experience	Adjusted 5-year probability of recurrence		10 vs 250 prior cases
		10 prior cases	250 prior cases	Absolute difference	Relative difference
Low risk	<0.001	11.0%	4.4%	6.6% (3.4%, 10.3%)	2.5 (1.7, 4.0)
Intermediate risk	<0.001	25.4%	13.4%	12.0% (6.9%, 18.2%)	1.9 (1.5, 2.6)
High risk	0.016	42.6%	32.9%	9.7% (1.2%, 18.2%)	1.3 (1.03, 1.6)