Table 1.

Characteristics of PCa Cases and Controls

Variables	Cases (%) N = 1015	Controls (%) N = 1052	P
Age	69.1 ± 8.2	68.6 ± 8.9	0.828
≤ 64	291 (28.7)	308 (29.3)
65-75	496 (48.9)	500 (47.5)
> 75	228 (22.5)	244 (23.2)
Smoking status
Never	406 (40.0)	412 (39.2)	0.697
Ever	609 (60.0)	640 (60.8)
PSA value (ng/ml)
< 10	180 (19.4)
10-20	195 (21.0)
> 20	552 (59.6)
Missing	88 (8.7)
Gleason score
≤ 7 (3+4)	317 (31.2)
≥ 7 (4+3)	606 (59.7)
Missing	92 (9.1)
Stage of disease
I	5 (0.5)
II	434 (42.8)
III	142 (14.0)
IV	356 (35.1)
Missing	78 (7.7)

PSA: prostate-specifc antigen