Table 5.

Mixed-Model Parameter Estimates of Mean BMI Percentiles over Time by Race/Ethnicity among Female Children with BMI Values across Two or More Age Periods^a

N = 1290	Age-Adjusted		Fully Adjusted Model
	Mean (CI)	P value	Mean (CI)	P value
Mean BMI percentiles for 5 year olds at index visitb
White (ref), n=804	52.56 (49.37, 55.75)	Ref	54.00 (50.83, 57.17)	Ref
Black, n=400	54.53 (49.27, 59.8)	0.527	55.77 (50.27, 61.28)	0.577
Hispanic, n=137	49.60 (41.75, 57.45)	0.492	50.94 (43.00, 58.88)	0.480
Segment-specific slope (Δ/year)
White
Age <9 yrs	1.93 (0.91, 2.95)	<0.001	0.95 (−0.36, 2.27)	0.156
Age 9–12 yrs	−2.24 (−3.29, −1.19)	<0.001	−2.58 (−3.95, −1.21)	<0.001
Age 12+ yrs	0.47 (−0.58, 1.52)	0.378	1.18 (−0.14, 2.51)	0.08
Black
Age <9 yrs	2.35 (0.69, 4.01)	0.006	1.34 (−0.59, 3.27)	0.173
Age 9–12 yrs	−0.37 (−1.93, 1.19)	0.642	−0.66 (−2.53, 1.22)	0.493
Age 12+ yrs	−0.12 (−1.5, 1.26)	0.862	0.64 (−1.02, 2.3)	0.452
Hispanic
Age <9 yrs	4.91 (2.4, 7.41)	<0.001	3.89 (1.22, 6.57)	0.004
Age 9–12 yrs	−1.47 (−4.06, 1.12)	0.265	−1.72 (−4.46, 1.02)	0.219
Age 12+ yrs	0.53 (−1.72, 2.79)	0.642	1.1 (−1.26, 3.46)	0.361
Difference in segment-specific slope (Δ/year) between races
Black vs White
Age <9 yrs	0.42 (−1.51, 2.35)	0.670	0.39 (−1.58, 2.36)	0.698
Age 9–12 yrs	1.87 (0.00, 3.74)	0.050	1.92 (0.00, 3.85)	0.051
Age 12+ yrs	−0.59 (−2.31, 1.13)	0.499	−0.55 (−2.3, 1.21)	0.542
Hispanic vs White
Age <9 yrs	2.98 (0.29, 5.67)	0.030	2.94 (0.24, 5.64)	0.033
Age 9–12 yrs	0.77 (−2.02, 3.56)	0.589	0.86 (−1.94, 3.66)	0.546
Age 12+ yrs	0.06 (−2.41, 2.54)	0.959	−0.09 (−2.57, 2.4)	0.947

BMI, body mass index; BP, blood pressure; CI, confidence interval; Δ, change

^aModel 1 adjusted for index visit age. Fully adjusted model adjusted for index visit age, health insurance status (commercial insurance as referent), and index visit blood pressure.

^bThe index visit refers to the first visit of record for each child