Table 9.

Mixed-Model Parameter Estimates of Mean Systolic Blood Pressure Percentiles over Time by Race/Ethnicity among Female Children with Blood Pressure Values Across at Two or More Age Periods^a

N = 1284	Age-Adjusted		Fully Adjusted Model
	Mean (CI)	P value	Mean (CI)	P value
Mean systolic BP percentiles for 5 year olds at index visitb
White (ref), n=807	43.16 (40.41, 45.91)	Ref	42.75 (40.05, 45.45)	Ref
Black, n=345	46.46 (41.86, 51.06)	0.224	45.24 (40.41, 50.06)	0.370
Hispanic, n=132	44.19 (37.2, 51.17)	0.788	43.84 (36.79, 50.89)	0.776
Segment-specific slope (Δ/year)
White
Age <9 yrs	2.69 (1.75, 3.62)	<0.001	2.67 (1.73, 3.61)	<0.001
Age 9–12 yrs	−0.40 (−1.54, 0.74)	0.496	−0.37 (−1.53, 0.78)	0.526
Age 12+ yrs	−1.63 (−2.63, −0.62)	0.002	−1.55 (−2.57, −0.54)	0.003
Black
Age <9 yrs	1.39 (−0.14, 2.92)	0.076	1.5 (−0.13, 3.13)	0.071
Age 9–12 yrs	−0.57 (−2.3, 1.17)	0.521	−0.57 (−2.44, 1.31)	0.553
Age 12+ yrs	−1.80 (−3.16, −0.45)	0.009	−1.53 (−2.98, −0.09)	0.037
Hispanic
Age <9 yrs	2.90 (0.51, 5.29)	0.018	2.79 (0.36, 5.21)	0.024
Age 9–12 yrs	0.56 (−2.37, 3.48)	0.709	0.68 (−2.29, 3.64)	0.654
Age 12+ yrs	−2.52 (−4.84, −0.2)	0.033	−2.42 (−4.76, −0.09)	0.042
Difference in segment-specific slope (Δ/year) between races
Black vs White
Age <9 yrs	−1.30 (−3.08, 0.48)	0.153	−1.17 (−3, 0.67)	0.212
Age 9–12 yrs	−0.17 (−2.24, 1.89)	0.87	−0.19 (−2.33, 1.94)	0.859
Age 12+ yrs	−0.18 (−1.85, 1.5)	0.834	0.02 (−1.69, 1.73)	0.981
Hispanic vs White
Age <9 yrs	0.21 (−2.35, 2.76)	0.874	0.12 (−2.45, 2.69)	0.929
Age 9–12 yrs	0.95 (−2.18, 4.09)	0.551	1.05 (−2.1, 4.2)	0.514
Age 12+ yrs	−0.90 (−3.41, 1.62)	0.486	−0.87 (−3.39, 1.65)	0.499

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 body mass index.

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