. Author manuscript; available in PMC: 2010 Apr 29.

Published in final edited form as: J Urol. 2010 Feb 19;183(4):1360–1365. doi: 10.1016/j.juro.2009.12.015

Table 2.

Adjusted probability of positive surgical margin for a surgeon with 10 vs 250 prior cases

	Adjusted P value for surgeon experience^†	Adjusted probability of positive surgical margin, %		Difference in 250 vs 10 prior cases (95% Confidence Interval)
	Adjusted P value for surgeon experience^†	10 prior cases	250 prior cases	Absolute difference, %	Relative difference
Main analyses
Overall	0.017	40.1	25.2	14.9 (11.3, 18.2)	1.59 (1.43, 1.76)
Organ confined	<0.001	33.8	18.6	15.2 (11.2, 19.6)	1.82 (1.56, 2.14)
Non-organ confined	0.008	55.3	43.1	12.2 (6.1, 18.7)	1.28 (1.13, 1.46)

Probabilities are for a patient with typical cancer severity (mean prostate-specific antigen level, pathologic stage and grade) treated in 1997 (approximately equal numbers of patients were treated before and after 1997). PSA = prostate-specific antigen.

^†

Test for the association between experience and outcome in the multivariable model (two-sided p value)