Table 4.

Select population characteristics of bladder cancer cases and controls

VariableCases, n = 184Controls, n = 192P value
Age at blood draw,* mean (SD)64.1 (8.8)64.1 (8.4)0.99
BMI at blood draw, mean (SD)25.8 (3.6)25.7 (4.2)0.76
% male67.265.50.72
Relative telomere length, mean (SD)0.23 (0.16)0.27 (0.15)0.002
Relative telomere length, median0.220.26
Pack-years of smoking, mean (SD)33.2 (23.8)27.0 (20.2)0.02
Cigarette smoking,§ n (%)0.75
    Never58 (31.7)60 (31.6)
    Former92 (50.3)101 (53.2)
    Current33 (18.0)29 (15.3)
  • * Age at blood draw was a matching factor.

  • P value obtained from Wilcoxon rank sum test.

  • Among cigarette smokers only.

  • § Smoking status was a matching factor. Note that for smoking in NHS, matching was current versus not current smoking.