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Table 2 Incidence rate ratio (IRR) of breast cancer among immigrants' daughters in Sweden, 1961 to 2007

From: Breast cancer incidence and case fatality among 4.7 million women in relation to social and ethnic background: a population-based cohort study

 

Cases

PYRS$

IRR* (95% CI)

   

Vs. native Swedes

Vs. mothers

All immigrants' daughters

2,808

11,457

0.97 (0.94 to 1.01)

1.08 (1.03 to 1.12)

Africa

7

340

0.60 (0.29 to 1.25)

0.60 (0.27 to 1.30)

Northern

4

136

1.00 (0.37 to 2.65)

1.46 (0.50 to 4.28)

Africa except Northern

3

206

0.39 (0.13 to 1.21)

0.39 (0.12 to 1.27)

Asia

31

1,039

1.10 (0.78 to 1.57)

1.18 (0.82 to 1.71)

Eastern

15

82

1.60 (0.96 to 2.65)

2.09 (1.17 to 3.71)

South-Central

7

245

0.84 (0.40 to 1.76)

0.88 (0.41 to 1.90)

South-Eastern

3

133

1.11 (0.36 to 3.44)

1.71 (0.53 to 5.55)

Western

6

592

0.78 (0.35 to 1.74)

0.53 (0.23 to 1.23)

Europe

2,538

9,590

0.97 (0.93 to 1.01)

1.04 (0.99 to 1.09)

Eastern

227

901

0.97 (0.85 to 1.10)

1.09 (0.94 to 1.27)

   Czechoslovakia†

28

121

0.91 (0.63 to 1.31)

1.15 (0.70 to 1.87)

   Hungary

36

219

0.88 (0.63 to 1.22)

1.00 (0.65 to 1.53)

   Poland

66

349

0.88 (0.69 to 1.12)

1.09 (0.84 to 1.42)

   Soviet Union†

96

171

1.15 (0.94 to 1.40)

1.14 (0.87 to 1.49)

   Other

10

60

1.22 (0.66 to 2.28)

1.20 (0.62 to 2.33)

Northern

1,902

6,628

0.96 (0.92 to 1.01)

1.01 (0.95 to 1.08)

   Denmark

332

963

0.99 (0.89 to 1.11)

1.01 (0.86 to 1.19)

   Estonia

144

329

0.97 (0.82 to 1.14)

1.34 (0.96 to 1.89)

   Finland

830

3,920

0.94 (0.88 to 1.01)

0.98 (0.90 to 1.07)

   Latvia

22

53

0.91 (0.60 to 1.39)

0.96 (0.47 to 1.93)

   Norway

556

1,230

0.96 (0.88 to 1.04)

1.14 (0.99 to 1.31)

   UK

36

184

1.08 (0.78 to 1.50)

1.12 (0.75 to 1.68)

   Other

8

43

1.13 (0.57 to 2.27)

1.01 (0.46 to 2.21)

Southern

54

989

0.85 (0.65 to 1.11)

0.87 (0.65 to 1.16)

   Italy

23

137

0.99 (0.66 to 1.48)

0.95 (0.51 to 1.78)

   Yugoslavia†

15

545

0.62 (0.37 to 1.02)

0.69 (0.40 to 1.19)

   Other

16

331

0.95 (0.58 to 1.56)

0.86 (0.50 to 1.45)

Western

418

1,338

1.01 (0.92 to 1.11)

1.12 (0.97 to 1.30)

   Austria

48

166

1.01 (0.76 to 1.34)

0.82 (0.53 to 1.24)

   France

21

75

1.13 (0.74 to 1.74)

1.37 (0.75 to 2.52)

   Germany

326

970

1.04 (0.93 to 1.16)

1.26 (1.07 to 1.50)

   Netherlands

20

84

0.95 (0.62 to 1.48)

0.80 (0.43 to 1.47)

   Other

12

60

0.70 (0.40 to 1.23)

0.48 (0.23 to 0.98)

Latin America

12

272

1.22 (0.69 to 2.15)

2.00 (1.11 to 3.60)

North America

228

369

1.04 (0.91 to 1.19)

1.03 (0.79 to 1.35)

   Canada

11

32

0.92 (0.51 to 1.67)

1.23 (0.47 to 3.19)

   USA

217

336

1.05 (0.92 to 1.20)

0.99 (0.75 to 1.31)

Oceania

4

16

3.26 (1.22 to 8.69)

5.34 (1.16 to 24.60)

  1. * All IRRs are adjusted for age at follow-up, calendar period of follow-up, years of education and place of residence at diagnosis. Native Swedish women with both parents born in Sweden were the reference group. $PYRS = person-years at risk divided by 1,000. † Czechoslovakia includes Czech Republic and Slovakia. Soviet Union includes Belarus, Moldova, Russian Federation and Ukraine. Yugoslavia includes Croatia, Macedonia, Serbia, Slovenia and Montenegro.
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Breast Cancer Research

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