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Table 2 Incidence Rate Ratios (IRRs) for country of birth and invasive breast cancer subtypes

From: Incidence of breast cancer subtypes in immigrant and non-immigrant women in Norway

 

Age 20–75

Age 20–49

Cases/PYR

IRR (95% CI)

Cases/PYR

IRR (95% CI)

All subtypes

Non-immigrants

21,682/14608517

1.00 (ref)

4750/8335077

1.00 (ref)

High-income

675/477618

1.07 (0.99–1.16)

154/305153

0.94 (0.80–1.10)

Eastern Europe

417/593550

0.85 (0.77–0.93)

195/486627

0.90 (0.78–1.04)

Middle East

136/176786

0.93 (0.79–1.10)

69/147450

0.97 (0.77–1.23)

Sub-Saharan Africa

60/152194

0.62 (0.48–0.80)

43/136880

0.75 (0.56–1.02)

South Asia

139/180867

0.78 (0.66–0.92)

61/139461

0.87 (0.68–1.12)

South-East Asia

178/284409

0.71 (0.61–0.82)

101/232898

0.85 (0.70–1.04)

Luminal A-like

Non-immigrants

11,732/14608517

1.00 (ref)

2418/8335077

1.00 (ref)

High-income

366/477618

1.08 (0.97–1.20)

84/305153

1.03 (0.83–1.28)

Eastern Europe

222/593550

0.86 (0.76–0.99)

99/486627

0.95 (0.77–1.16)

Middle East

81/176786

1.06 (0.85–1.32)

41/147450

1.18 (0.86–1.60)

Sub-Saharan Africa

21/152194

0.43 (0.28–0.66)

12/136880

0.44 (0.25–0.78)

South Asia

63/180867

0.67 (0.52–0.86)

25/139461

0.73 (0.49–1.08)

South-East Asia

83/284409

0.63 (0.51–0.79)

46/232898

0.79 (0.59–1.06)

Luminal B-like/HER2-

Non-immigrants

2767/14608517

1.00 (ref)

377/8335077

1.00 (ref)

High-income

102/477618

1.29 (1.06–1.57)

11/305153

0.85 (0.46–1.54)

Eastern Europe

55/593550

1.02 (0.78–1.33)

21/486627

1.20 (0.77–1.87)

Middle East

15/176786

0.97 (0.58–1.61)

8/147450

1.41 (0.70–2.83)

Sub-Saharan Africa

9/152194

0.93 (0.48–1.80)

6/136880

1.30 (0.58–2.92)

South Asia

10/180867

0.49 (0.27–0.92)

2/139461

0.36 (0.09–1.43)

South-East Asia

26/284409

0.97 (0.66–1.44)

9/232898

0.95 (0.49–1.84)

Luminal B-like/HER2+ 

Non-immigrants

2030/14608517

1.00 (ref)

653/8335077

1.00 (ref)

High-income

58/477618

0.96 (0.74–1.25)

17/305153

0.75 (0.46-.21)

Eastern Europe

46/593550

0.84 (0.63–1.13)

30/486627

0.97 (0.67–1.40)

Middle East

12/176786

0.72 (0.41–1.28)

4/147450

0.40 (0.15–1.06)

Sub-Saharan Africa

10/152194

0.85 (0.46–1.59)

8/136880

0.97 (0.48–1.94)

South Asia

20/180867

1.05 (0.68–1.63)

17/139461

1.72 (1.06–2.78)

South-East Asia

29/284409

1.03 (0.71–1.49)

23/232898

1.37 (0.90–2.08)

HER2+ 

Non-immigrants

984/14608517

1.00 (ref)

274/8335077

1.00 (ref)

High-income

27/477618

0.93 (0.63–1.36)

6/305153

0.62 (0.28–1.40)

Eastern Europe

13/593550

0.51 (0.30–0.89)

6/486627

0.45 (0.20–1.01)

Middle East

6/176786

0.79 (0.35–1.76)

4/147450

0.93 (0.35–2.49)

Sub-Saharan Africa

4/152194

0.75 (0.28–2.01)

4/136880

1.11 (0.41–2.99)

South Asia

18/180867

2.02 (1.26–3.23)

9/139461

2.13 (1.09–4.13)

South-East Asia

16/284409

1.22 (0.75–2.01)

9/232898

1.24 (0.64–2.42)

TNBC

Non-immigrants

1886/14608517

1.00 (ref)

582/8335077

1.00 (ref)

High-income

59/477618

1.03 (0.79–1.34)

23/305153

1.10 (0.73–1.67)

Eastern Europe

47/593550

0.93 (0.69–1.24)

27/486627

0.92 (0.62–1.35)

Middle East

14/176786

0.92 (0.54–1.56)

7/147450

0.74 (0.35–1.56)

Sub-Saharan Africa

9/152194

0.82 (0.43–1.58)

8/136880

1.00 (0.50–2.01)

South Asia

21/180867

1.19 (0.78–1.84)

8/139461

0.87 (0.43–1.79)

South-East Asia

14/284409

0.54 (0.32–0.91)

8/232898

0.50 (0.25–1.01)

Unknown

Non-immigrants

2469/14608517

1.00 (ref)

509/8335077

1.00 (ref)

High-income

69/476027

0.97 (0.76–1.23)

15/305153

0.86 (0.51–1.43)

Eastern Europe

38/593550

0.68 (0.50–0.94)

13/486627

0.55 (0.32–0.96)

Middle East

9/176786

0.55 (0.28–1.06)

5/147450

0.65 (0.27–1.58)

Sub-Saharan Africa

8/152194

0.75 (0.37–1.49)

6/136880

0.97 (0.43–2.18)

South Asia

8/180867

0.40 (0.20–0.79)

1/139461

0.13 (0.02–0.94)

South-East Asia

12/284409

0.43 (0.24–0.75)

7/232898

0.55 (0.26–1.15)

  1. PYR; person-years, IRR; incidence rate ratio, CI; confidence interval, ref; reference, High-income; Western Europe, USA, Canada, Australia and New Zealand, Eastern Europe; Eastern Europe, Baltics and Balkan, Middle East; Middle East and North Africa