Table 2 Number of cancer deaths in the exposed group and mortality ratios in the comparison of 5-year cohorts

Number of deaths in exposed group in 1983–1987

147

10

6

0

3

27

 MR with 95% confidence interval

1.41 (1.08–1.82)

2.22 (0.70–7.09)

1.33 (0.38–4.73)

NE

NE

2.40 (1.16–4.96)

Number of deaths in exposed group in 1988–1992

216

12

7

1

1

27

 MR with 95% confidence interval

1.19 (0.97–1.45)

0.67 (0.32–1.42)

1.25 (0.40–3.95)

0.04 (0.01–0.29)

0.45 (0.04–4.94)

1.73 (0.91–3.29)

Number of deaths in exposed group in 1993–1997

365

29

18

35

4

28

 MR with 95% confidence interval

1.11 (0.95–1.29)

1.72 (0.92–3.21)

0.94 (0.49–1.83)

0.74 (0.47–1.16)

3.56 (0.40–31.83)

0.96 (0.56–1.63)

Number of deaths in exposed group in 1998–2003

734

100

54

88

7

40

 MR with 95% confidence interval

1.27 (1.11–1.45)

1.47 (0.99–2.17)

1.93 (1.07–3.47)

1.13 (0.77–1.64)

1.16 (0.30–4.50)

1.00 (0.58–1.71)

Number of deaths in exposed group in 1969–2003^b

1630

153

87

127

16

171

 Total MR with 95% confidence interval

1.37 (1.27–1.48)

1.73 (1.31–2.28)

1.79 (1.23–2.61)

0.98 (0.76–1.27)

2.20 (0.86–5.62)

1.26 (0.99–1.60)