Table 3.

Association of Variables With Positive Bone Scan in Univariate Analysis

Variable	Odds Ratio	95% CI	P
Preoperative PSA, ng/mL	1.02	1.00 to 1.03	.04
Surgical margin (positive v negative)	0.86		.53
Extracapsular extension (positive v negative)	1.14		.58
Seminal vesicle invasion (positive v negative)	1.81	1.12 to 2.94	.02
Lymph node involvement (positive v negative)	1.30		.45
Pathology Gleason sum	1.10		.38
Months from operation to BCR	0.99		.14
Years from BCR to bone scan	1.00		.95
PSA doubling time, months	1.00		.72
PSA slope, log (ng/mL/mo)	2.29		.06
PSA velocity, ng/mL/mo	1.07	1.04 to 1.09	< .001
Trigger PSA, ng/mL	1.015	1.012 to 1.019	< .001

Abbreviations: PSA, prostate-specific antigen; BCR, biochemical recurrence.