Skip to main content

Table 2 Association Between Household Intactness and Timing of Breast Development Onset: KPNC Puberty Study (2009–2020)

From: Early life household intactness and timing of pubertal onset in girls: a prospective cohort study

   Unadjusted Adjusteda Adjusteda,b
Household Intactness N TR 95%CI HR 95%CI TR 95%CI HR 95%CI TR 95%CI HR 95%CI
Non-intact household
before age 2 years
1,915 0.96 0.96,0.97 1.42 1.31,1.54 0.97 0.97,0.98 1.29 1.19,1.40 0.98 0.97,0.99 1.25 1.14,1.36
Non-intact household
during age 2–6 years
2,070 0.98 0.98,0.99 1.17 1.08,1.26 0.99 0.98,1.00 1.13 1.04,1.22 0.99 0.98,1.00 1.08 1.00,1.17
Intact household 20,765 Ref   Ref   Ref   Ref   Ref   Ref  
  1. CI confidence interval; HR hazard ratio; KPNC Kaiser Permanente Northern California; TR time ratio
  2. aAdjusted for race/ethnicity and median household income
  3. bAdjusted for prepubertal BMI