Table 3 Breast cancer incidence in pre-, peri/postmenopausal and all women in relation to serum T3 levels

1

494

28

10,418

269

1.00

1.00

1.00

1.00

2

704

40

14,613

274

1.02 (0.63 to 1.66)

1.12 (0.69 to 1.84)

1.10 (0.66 to 1.83)

0.99 (0.60 to 1.66)

3

456

31

9,096

341

1.28 (0.77 to 2.13)

1.42 (0.83 to 2.43)

1.37 (0.78 to 2.42)

1.21 (0.70 to 2.10)

4

531

47

10,091

466

1.75 (1.10 to 2.80)*

1.87(1.12 to 3.14)*

1.98 (1.15 to 3.38)*

1.78 (1.10 to 2.90)*

P-trend

0.007

0.009

0.007

0.008

1

298

25

6,376

392

1.00

1.00

1.00

1.00

2

311

21

6,621

317

0.81 (0.45 to 1.45)

1.00 (0.55 to 1.81)

1.00 (0.53 to 1.87)

0.80 (0.43 to 1.46)

3

131

7

2,816

249

0.63 (0.27 to 1.47)

0.71 (0.30 to 1.70)

0.79 (0.33 to 1.91)

0.69 (0.33 to 1.61)

4

123

9

2,610

345

0.88 (0.41 to 1.88)

0.92 (0.40 to 2.15)

1.07 (0.45 to 2.50)

0.96 (0.44 to 2.10)

P-trend

0.49

0.66

0.94

0.99

1

196

3

4,042

74

1.00

1.00

1.00

1.00

2

393

19

7,992

237

3.24 (0.96 to 10.9)

3.26 (0.96 to 11.1)

2.75 (0.80 to 9.48)

2.90 (0.85 to 9.91)

3

325

24

6,281

382

5.21 (1.57 to 17.4)*

5.53 (1.65 to 18.6)*

4.63 (1.35 to 15.8)*

4.39 (1.30 to 14.8)*

4

408

38

7,481

508

6.94 (2.14 to 22.5)*

6.87 (2.09 to 22.6)*

6.14 (1.86 to 20.3)*

6.49 (1.99 to 21.1)*

P-trend

<0.001

<0.001

<0.001

<0.001