Table 4 Multinomial logistic regression models for the natural logarithm transformed PFOA and PFDA concentrations and breast cancer risk according to different subtypes of breast cancer

Control

657

Ref

Ref

Ref

Ref

ER-

96

1.01 (0.81, 1.26)

1.08 (0.82, 1.41)

0.93 (0.76, 1.14)

0.94 (0.72, 1.22)

ER + 

218

1.43 (1.22, 1.67)*

1.47 (1.19, 1.80)*

1.19 (1.01, 1.41)*

1.21 (0.98, 1.50)

PR-

131

1.00 (0.82, 1.21)

1.03 (0.81, 1.30)

1.01 (0.84, 1.22)

0.93 (0.73, 1.18)

PR + 

183

1.42 (1.19, 1.68)*

1.36 (1.09, 1.69)*

1.06 (0.90, 1.26)

1.04 (0.83, 1.30)

Luminal A

168

1.23 (1.03, 1.46)*

1.36 (1.08, 1.71)*

1.12 (0.94, 1.34)

1.12 (0.89, 1.42)

Luminal B

52

1.03 (0.77, 1.38)

1.06 (0.74, 1.50)

0.84 (0.66, 1.07)

0.83 (0.61, 1.13)

HER2

65

1.46 (1.13, 1.90)*

1.62 (1.19, 2.21)*

1.28 (0.97, 1.70)

1.26 (0.91, 1.76)

Basal

29

1.72 (1.20, 2.47)*

1.45 (0.93, 2.24)

1.20 (0.80, 1.80)

1.06 (0.70, 1.60)