Table 3.

Regression results on the association of PSA (ng/mL) with BMI, stratified by age

Age group (years)	Normal weight	Overweight		Obese		Per BMI increase (treat BMI as a continuous variable)
		β (95% CI)	P Value	β (95% CI)	P Value	β (95% CI)	P Value
≤40
Model 1	referent	-0.08 (-0.19, -0.04)	0.002	-0.062 (-0.486, 0.198)	0.406	-0.031 (-0.009, 0.000)	0.056
Model 2	referent	-0.08 (-0.19, -0.04)	0.002	-0.054 (-0.441, 0.205)	0.471	-0.030 (-0.008, 0.000)	0.062
Model 3	referent	-0.08 (-0.19, -0.04)	0.002	-0.086 (-0.555, 0.147)	0.254	-0.032 (-0.009, 0.000)	0.05
41-59
Model 1	referent	-0.102 (-0.162,-0.066)	<0.001	-0.004 (-0.275, 0.262)	0.960	-0.100 (-0.007, -0.004)	< 0.001
Model 2	referent	-0.101 (-0.163,-0.065)	<0.001	0.008 (-0.252, 0.278)	0.921	-0.104 (-0.007, -0.004)	< 0.001
Model 3	referent	-0.104 (-0.161,-0.067)	<0.001	0.010 (-0.269, 0.308)	0.894	-0.105 (-0.007, -0.004)	< 0.001
≥60
Model 1	referent	-0.062 (-0.066,-0.006)	0.02	0.050 (-0.136, 0.221)	0.636	-0.148 (-0.005, -0.003)	< 0.001
Model 2	referent	-0.051 (-0.059,0.001)	0.056	0.038 (-0.157, 0.228)	0.716	-0.151 (-0.005, -0.003)	< 0.001
Model 3	referent	-0.052 (-0.057,0.000)	0.049	0.026 (-0.155, 0.199)	0.805	-0.149 (-0.004, -0.003)	< 0.001
All men
Model 1	referent	-0.081 (-0.092, -0.045)	< 0.001	-0.010 (-0.140, 0.112)	0.831	-0.221 (-0.023, -0.020)	< 0.001
Model 2	referent	-0.080 (-0.085, -0.038)	< 0.001	-0.012 (-0.147, 0.113)	0.797	-0.222 (-0.022, -0.019)	< 0.001
Model 3	referent	-0.080 (-0.082, -0.039)	< 0.001	-0.010 (-0.139, 0.104)	0.778	-0.242 (-0.022, -0.019)	< 0.001

Model 1: crude model; Model 2: adjusted for fasting blood glucose; Model 3: adjusted for prostate volume.