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. 2015 Aug 7;20(5):332–337. doi: 10.1007/s12199-015-0471-5

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 %) 0.76a
Smoking status
 Never 113 (32.1 %) 127 (36.1 %)
 Ever 239 (67.9 %) 225 (63.9 %) 0.27a
  Current smoker 69 (19.6 %) 56 (15.9 %) 0.14a
  Ex-smoker 170 (48.3 %) 169 (48.0 %) 0.47a
 Mean age (years), mean ± SD 65.0 (± 6.5) 65.0 (± 6.5) 0.98b

a P values were calculated form chi-square test

b P values were calculated form t test