Associations between estrogen receptor genetic polymorphisms, smoking status, and prostate cancer risk: a case–control study in Japanese men

Table 1 Demographic characteristics of prostatic cancer cases and controls

Characteristics	Controls N = 352 (%)	Case N = 352 (%)	P value
Age at reference (years)
≤65 (%)	176 (50.0 %)	180 (51.1 %)
≥66 (%)	176 (50.0 %)	172 (48.9 %)	0.76^a
Smoking status
Never	113 (32.1 %)	127 (36.1 %)
Ever	239 (67.9 %)	225 (63.9 %)	0.27^a
Current smoker	69 (19.6 %)	56 (15.9 %)	0.14^a
Ex-smoker	170 (48.3 %)	169 (48.0 %)	0.47^a
Mean age (years), mean ± SD	65.0 (± 6.5)	65.0 (± 6.5)	0.98^b

ISSN: 1347-4715