Table 1

Selected population characteristics of bladder cancer cases and matched controls

Variable

NHS

HPFS


Cases (n = 78)

Controls (n = 234)

P-value

Cases (n = 139)

Controls (n = 293)

P-value


Age at diagnosis (years),1 mean (SD)

60.6 (9.2)

60.6 (9.2)

> 0.99

68.5 (8.6)

68.6 (8.6)

0.87

BMI at diagnosis (kg), mean (SD)

22.0 (9.7)

23.8 (8.6)

0.13

25.8 (2.8)

25.5 (3.2)

0.45

Ethnicity/ancestry, n (%)

0.67

0.56

Caucasian

65 (90.3)

210 (93.8)

128 (99.2)

275 (98.9)

African-American

2 (2.8)

3 (1.3)

0 (0.0)

0 (0.0)

Asian

0 (0.0)

1 (0.45)

0 (0.0)

0 (0.0)

Hispanic

1 (1.4)

2 (0.89)

0 (0.0)

0 (0.0)

Other

4 (5.6)

8 (3.6)

1 (0.78)

3 (1.1)

Packyears at diagnosis2, mean (SD)

30.2 (22.3)

27.6 (23.1)

0.49

30.9 (19.8)

26.9 (19.0)

0.14

Alcohol use at diagnosis (g), mean (SD)

6.3 (9.3)

6.1 (10.8)

0.86

16.1 (19.4)

13.2 (15.2)

0.12

Smoking status at diagnosis, n (%)

0.12

0.81

Never

22 (29.7)

72 (31.0)

38 (31.9)

83 (32.1)

Former

37 (50.0)

127 (54.7)

67 (56.3)

143 (55.2)

Current

15 (20.3)

33 (14.2)

14 (11.8)

33 (12.7)


1 Cases and controls were matched on year of birth

2 Among cigarette smokers

McGrath et al. BMC Cancer 2006 6:239   doi:10.1186/1471-2407-6-239

Open Data