American Association for Cancer Research

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Table 1.

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

Variable	HPFS					NHS
Variable		Cases, n = 123	Controls, n = 125	P value	Cases, n = 61	Controls, n = 67	P value
Age at blood draw*, mean (SD)	66.9 (8.1)	66.7 (8.0)	0.90	58.5 (7.3)	59.1 (6.9)	0.63
BMI at blood draw, mean (SD)	26.0 (3.0)	25.3 (3.2)	0.10	20.8 (10.7)	24.7 (8.2)	0.02
Relative telomere length,^† mean (SD)	0.19 (0.14)	0.23 (0.13)	0.01	0.31 (0.17)	0.36 (0.14)	0.06
Relative telomere length, median	0.16	0.23		0.30	0.35
Pack-years of smoking,^‡ mean (SD)	35.0 (24.6)	26.5 (19.5)	0.02	29.7 (21.9)	27.8 (21.8)	0.70

Variable	HPFS					NHS
Variable		Cases, n = 123	Controls, n = 125	P value	Cases, n = 61	Controls, n = 67	P value
Age at blood draw*, mean (SD)	66.9 (8.1)	66.7 (8.0)	0.90	58.5 (7.3)	59.1 (6.9)	0.63
BMI at blood draw, mean (SD)	26.0 (3.0)	25.3 (3.2)	0.10	20.8 (10.7)	24.7 (8.2)	0.02
Relative telomere length,^† mean (SD)	0.19 (0.14)	0.23 (0.13)	0.01	0.31 (0.17)	0.36 (0.14)	0.06
Relative telomere length, median	0.16	0.23		0.30	0.35
Pack-years of smoking,^‡ mean (SD)	35.0 (24.6)	26.5 (19.5)	0.02	29.7 (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.