Table 3.

Relative risk and 95% CI of time to biochemical progression after radical prostatectomy among men with diabetes at surgery stratified by race and obesity^*

	No. total patients	No. diabetics	Hazard Ratio† (95% CI)	p	p – interaction by race††	p – interaction by obesity†††
Overall**	1240	226	0.94 (0.72 - 1.23)	0.67	0.09
White	659	99	1.24 (0.84 - 1.85)	0.28		0.006
Non obese	479	55	0.69 (0.36 - 1.32)	0.26
Obese	180	44	2.52 (1.40 - 4.54)	0.002
Black	581	127	0.79 (0.55 - 1.14)	0.21		0.91
Non obese	402	71	0.75 (0.45 - 1.25)	0.27
Obese	179	56	0.89 (0.52 - 1.54)	0.68

^*Obesity was defined as a BMI ≥ 30 kg/m²

^**22 men were missing follow-up and not included in these analyses

^†Adjusted for age, year of surgery, race, BMI, clinical stage, biopsy Gleason score, center, and pre-operative PSA

^††p – interaction by race assessed by including the cross product term between diabetes and race in the model

^†††p – interaction by obesity assessed by including the cross product term between obesity and race in the model