Table 2.

Mean (SD) BMI z Score and Obesity Prevalence in Young Adulthood (Age 21–29 Years) by Tertile of Age at AR, Tertile of BMIz Score at AR, and Tertile of Parent BMI

FemaleMaleTotal
Age at AR
 Early (age <4.8 years)
  BMI zscore  0.55 (1.35)  0.63 (0.94)  0.58 (1.23)
  % Obese (#obese/total)20 (17/87) 37 (15/41) 25 (32/128)
 Middle (4.8 years ≤ age <6.2 years)
  BMI zscore  0.00 (0.64)  0.23 (1.25)  0.09 (0.94)
  % Obese (#obese/total) 10 (8/79) 20 (11/54) 14 (19/133)
 Late (age ≥6.2 years)
  BMI zscore−0.32 (0.63)−0.19 (0.77)−0.26 (0.70)
  % Obese (#obese/total)  3 (2/69)  7 (4/60)  5 (6/129)
BMI z score at AR
 Lean (BMI z score <−0.54)
  BMI zscore−0.36 (0.73)−0.34 (0.66)−0.35 (0.70)
  % Obese (#obese/total)  3 (2/71)  6 (3/54)  4 (5/125)
 Medium (−0.54 ≤ BMI z score <0.05)
  BMIzscore  0.04 (0.82)  0.10 (0.91)  0.06 (0.85)
  % Obese (#obese/total)10 (9/87) 15 (6/41) 12 (15/128)
 Heavy (BMI z score ≥0.05)
  BMI zscore  0.46 (0.89)  0.62 (1.20)  0.53 (1.04)
  % Obese (#obese/total) 19 (13/70) 30 (17/56) 24 (30/126)
Maternal BMI
 Lean (BMI <21.0)
  BMI zscore−0.29 (0.52)  0.20 (.082)−0.26 (0.65)
  % Obese (#obese/total)  0 (0/66) 12 (5/40)  5 (5/106)
 Medium (21.0 ≤ BMI <23.2)
  BMI zscore−0.05 (0.60)  0.20 (1.06)  0.04 (0.80)
  % Obese (#obese/total)  9 (6/69) 18 (7/38) 12 (13/107)
 Heavy (BMI ≥23.2)
  BMI zscore  0.62 (1.52)  0.32 (1.15)  0.51 (1.39)
  % Obese (#obese/total) 23 (15/65) 27 (11/41) 25 (26/106)
Paternal BMI
 Lean (BMI <24.1)
  BMI zscore−0.07 (0.88)−0.47 (0.63)−0.21 (0.82)
  % Obese (#obese/total)  7 (4/61)  3 (1/34)  5 (5/95)
 Medium (24.1 ≤ BMI <26.4)
  BMI zscore  0.13 (0.88)  0.16 (0.82)  0.14 (0.85)
  % Obese (#obese/total) 12 (7/56) 15 (6/40) 14 (13/96)
 Heavy (BMI ≥26.4)
  BMI zscore  0.31 (1.36)  0.27 (0.98)  0.29 (1.19)
  % Obese (#obese/total)15 (8/52) 28 (12/43) 21 (20/95)