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Table 1 Distribution of Characteristics by Household Intactness: KPNC Puberty Study (2009–2020), N = 26,044

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

Household intactness Non-intact household
before age 2 years
(n = 2,034)
Non-intact household
during age 2–6 years
(n = 2,186)
Intact household
(n = 21,824)
P value
  N % N % N %  
Neighborhood Annual Household Income ($)a, b 65,088 (28,353) 68,670 (28,557) 77,833 (31,052) < 0.001
Race/ethnicity
 White 533 5.6 757 8.0 8,187 86.4 < 0.001
 Black 523 29.7 332 18.8 908 51.5  
 Hispanic & Latinx 654 9.6 648 9.6 5,482 80.8  
 Asian/Pacific Islander 208 3.6 286 4.9 5,364 91.6  
 Other/Unknown 116 5.4 163 7.5 1,883 87.1  
Prepubertal BMI
 < 85th percentile 1,240 6.7 1,390 7.5 15,845 85.8 < 0.001
 ≥ 85th percentile 794 10.5 796 10.5 5,979 79.0  
  1. BMI body mass index; KPNC Kaiser Permanente Northern California
  2. aValues are expressed as mean (standard deviation)
  3. bCalculated using 2010 Census data by address at or within one year of birth