Table 1 Characteristics of bladder cancer patients and control individuals

Age at reference (years)

 <50 (%)

15 (5.3)

22 (8.6)

 50–<60 (%)

33 (11.7)

37 (14.4)

 60–<70 (%)

84 (29.8)

68 (26.5)

 ≥70 (%)

150 (53.2)

130 (50.6)

0.32^a

Smoking status

 Non-smokers (%)

85 (30.1)

81 (31.5)

 Light smokers (%)

94 (33.3)

99 (38.5)

 Heavy smokers (%)

103 (36.5)

77 (30.0)

0.25^a

Sex

 Male (%)

225 (79.8)

203 (79.0)

 Female (%)

57 (20.2) 

54 (21.0)

0.82^a

Mean age (years), mean ± SD

69.5 ± 10.6

67.5 ± 12.0

0.05^b

Mean pack-years of smokers, mean ± SD

40.0 ± 21.7

37.4 ± 23.2

0.27^b