Table 1.

Select population characteristics of bladder cancer cases and controls in the HPFS and NHS

VariableHPFS
NHS
Cases, n = 123Controls, n = 125P valueCases, n = 61Controls, n = 67P value
Age at blood draw*, mean (SD)66.9 (8.1)66.7 (8.0)0.9058.5 (7.3)59.1 (6.9)0.63
BMI at blood draw, mean (SD)26.0 (3.0)25.3 (3.2)0.1020.8 (10.7)24.7 (8.2)0.02
Relative telomere length, mean (SD)0.19 (0.14)0.23 (0.13)0.010.31 (0.17)0.36 (0.14)0.06
Relative telomere length, median0.160.230.300.35
Pack-years of smoking, mean (SD)35.0 (24.6)26.5 (19.5)0.0229.7 (21.9)27.8 (21.8)0.70
  • * Age at blood draw was a matching factor.

  • P value obtained from Wilcoxon rank sum test.

  • Among cigarette smokers only.