This erratum concerns the methods section. The error relates to the adjustment for physical activity, which was made for physical activity outside of work, not for physical activity at work, as erroneously stated on page 644.
Statistical analyses
Confounding variables were selected based on a priori knowledge from the literature including age (45–49, 50–54, 55–59, 60–64, 65–69, 70–74 years), parity (0, 1, 2, 3, ≥4), age at first term pregnancy (<20, 20–24, 25–29, 30–34, ≥35 years), months of breastfeeding per child (0, 1–5, 6–12, ≥13), hormone replacement therapy (HRT) (no treatment, oestrogen, progesterone, combined treatment), physical activity outside of work (quartiles), alcohol consumption (0, 1–14, 15–30, >30 g/day), height (<160, 160–169, ≥170 cm) and BMI (<18.5, 18.5–24.9, 25.0–29.9, ≥30 kg/m2).