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Table 3 Associations between breastfeeding duration and timing of pubic hair development in daughters: KPNC puberty study (N=3,087)

From: Breastfeeding and timing of pubertal onset in girls: a multiethnic population-based prospective cohort study

Breastfeeding durationa

N

TR

95% CI

HR

95% CI

Not breastfed

470

0.98

0.96–1.00

1.24

1.05–1.46

< 6 months

1028

0.99

0.97–1.00

1.14

1.00–1.30

≥6 months

1589

Ref

 

Ref

 
  1. CI Confidence interval, HR Hazard ratio, KPNC Kaiser Permanente Northern California, TR Time ratio
  2. aAdjusted for maternal race/ethnicity, maternal age at delivery, education, and parity