Table 6.

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

N = 1341	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=801	57.99 (55, 60.98)	Ref	58.72 (55.75, 61.69)	Ref
Black, n=351	54.6 (49.88, 59.32)	0.231	55.61 (50.62, 60.59)	0.283
Hispanic, n=138	48.24 (40.23, 56.24)	0.025	48.49 (40.39, 56.59)	0.019
Segment-specific slope (Δ/year)
White
Age <9 yrs	0.91 (−0.04, 1.87)	0.06	−0.08 (−1.31, 1.14)	0.895
Age 9–12 yrs	−2.2 (−3.31, −1.08)	<0.001	−2.08 (−3.51, −0.66)	0.004
Age 12+ yrs	−0.34 (−1.44, 0.77)	0.551	0.26 (−1.14, 1.66)	0.713
Black
Age <9 yrs	3.51 (2.03, 5)	<0.001	2.69 (0.94, 4.44)	0.003
Age 9–12 yrs	−2.54 (−4.1, −0.98)	0.002	−2.72 (−4.57, −0.87)	0.004
Age 12+ yrs	−0.38 (−1.76, 1.01)	0.596	0.22 (−1.43, 1.87)	0.792
Hispanic
Age <9 yrs	3.43 (0.91, 5.96)	0.008	2.71 (0.08, 5.35)	0.044
Age 9–12 yrs	0.09 (−2.57, 2.75)	0.947	−0.02 (−2.83, 2.79)	0.991
Age 12+ yrs	−0.86 (−3.18, 1.47)	0.471	−0.27 (−2.74, 2.19)	0.827
Difference in segment-specific slope (Δ/year) between races
Black vs White
Age <9 yrs	2.6 (0.85, 4.35)	0.004	2.77 (0.98, 4.57)	0.002
Age 9–12 yrs	−0.34 (−2.25, 1.57)	0.728	−0.64 (−2.59, 1.32)	0.523
Age 12+ yrs	−0.04 (−1.8, 1.72)	0.965	−0.04 (−1.84, 1.76)	0.965
Hispanic vs White
Age <9 yrs	2.52 (−0.17, 5.21)	0.066	2.79 (0.1, 5.49)	0.042
Age 9–12 yrs	2.29 (−0.59, 5.17)	0.12	2.06 (−0.84, 4.97)	0.163
Age 12+ yrs	−0.52 (−3.08, 2.05)	0.691	−0.54 (−3.12, 2.05)	0.684

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