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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 
% male 67.2 65.5 0.72 
Relative telomere length, mean (SD) 0.23 (0.16) 0.27 (0.15) 0.002 
Relative telomere length, median 0.22 0.26  
Pack-years of smoking, mean (SD) 33.2 (23.8) 27.0 (20.2) 0.02 
Cigarette smoking,§n (%)   0.75 
    Never 58 (31.7) 60 (31.6)  
    Former 92 (50.3) 101 (53.2)  
    Current 33 (18.0) 29 (15.3)  
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 
% male 67.2 65.5 0.72 
Relative telomere length, mean (SD) 0.23 (0.16) 0.27 (0.15) 0.002 
Relative telomere length, median 0.22 0.26  
Pack-years of smoking, mean (SD) 33.2 (23.8) 27.0 (20.2) 0.02 
Cigarette smoking,§n (%)   0.75 
    Never 58 (31.7) 60 (31.6)  
    Former 92 (50.3) 101 (53.2)  
    Current 33 (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.

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