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Table 1 Expected number of deaths and its dependency on cohort size and follow-up

From: Feasibility of a cohort study on health risks caused by occupational exposure to radiofrequency electromagnetic fields

Cohort

N = 5,000

N = 10,000

Follow-up (in years)

15

30

15

30

 

female

male

female

male

female

Male

female

male

Person years

45 970

44 464

105 356

96 535

91 939

88 929

210 712

193 069

Total mortality

180

347

1 115

1 624

361

695

2 231

3 248

CHD**

53

132

488

709

107

264

977

1 418

CHD without ischemia

12

25

108

123

25

50

216

246

accidents

12

33

50

100

25

66

100

207

Suicide

6

14

21

39

13

29

42

78

All cancers

74

102

326

417

148

204

652

835

   Breast

18

0

58

0

36

0

117

1

   Nervous system

3

4

22

25

7

9

44

51

   Lymphatic tissue

2

3

10

14

5

7

21

28

   Leukemia

2

2

9

11

4

5

19

23

   Brain

1

2

5

6

3

5

9

12

  1. * Bold marked figures show the expected number of deaths, fulfilling the given criteria of a significance level of 0.05, a statistical power of 80%, an estimated RR of 1.50 to reject the null-hypothesis
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Environmental Health

ISSN: 1476-069X