Table 3.

Weighted Distributions of risk factors/potential confounders.

Period	Period 1	Period 2	p-value for difference
Patient Visits (N)	N=281	N=408
	Sum weights=270.4	Sum Weights=414.0
	% or Mean (95% CI)	% or Mean (95% CI)
Age, years	12.4 (11.9, 12.8)	12.3 (11.8, 12.7)	0.69
Male	60%	61%	0.85
Black race	19%	20%	0.82
Hispanic Ethnicity	15%	15%	0.83
Baseline Income			0.90
≤ 36K	42%	41%
36–75K	29%	29%
>75K	29%	30%
Baseline maternal education			0.87
High school	40%	38%
Some college	28%	29%
College or more	32%	33%
Glomerular CKD	25%	26%	0.76
Years of CKD
Non-glomerular	11.4 (10.8, 11.9)	11.2 (10.7, 11.8)	0.76
Glomerular, HUS	5.7 (0.9, 10.4)	8.8 (6.5, 11.1)	0.20
Glomerular, non-HUS	6.7 (5.4, 8.0)	5.6 (4.7, 6.5)	0.16
GFR, mL/min/1.73m2	49 (46, 51)	49 (47, 52)	0.59
log2(uP/C)	−1.17 (−1.40, −0.94)	−1.26 (−1.48, −1.03)	0.59
BMI z	0.43 (0.28, 0.57)	0.40 (0.29, 0.51)	0.75
Growth failure, HT %ile<5	16%	15%	0.67
Low birth weight	19%	19%	0.85
SR-High BP diagnosis	55%	56%	0.85
Current corticosteroid	7%	7%	0.94
Antihypertensive use	68%	63%	0.18