Table 3 Linear regression model for \(\text {fPC}_{12}^{2}\) with breast cancer risk factor covariates (CAHRES)

Intercept

−1.332

0.272

1×10⁻⁶

Age

0.003

0.003

0.373

BMI

0.025

0.006

8×10⁻⁶

PD

0.022

0.002

< 2×10⁻¹⁶

Parity and AFB ^a

Nulliparous

Parity ≤2 and AFB ≤25

0.252

0.069

2×10⁻⁴

Parity ≤2 and AFB >25

0.100

0.068

0.142

Parity >2 and AFB ≤25

0.229

0.071

0.001

Parity >2 and AFB >25

0.108

0.093

0.243

HRT use

Never

Past

−0.121

0.089

0.175

Current

−0.074

0.050

0.140