. Author manuscript; available in PMC: 2019 May 4.

Published in final edited form as: Pediatr Nephrol. 2018 Oct 13;34(3):443–448. doi: 10.1007/s00467-018-4107-z

Table 1.

Baseline patient characteristics of the obstructive uropathy cohort

	Cases (n = 27)	Controls (n = 41)	p
Age at baseline (years)	10.0 (9−13)	10.0 (9−13)	0.950
Age at outcome (years)	15.9 (12.7, 16.9)	15.8 (12.7, 16.6)	0.821
Male sex	23 (85.2)	33 (80.5)	0.751
Nonwhite race	7 (25.9)	18 (43.9)	0.133
GFR (mL/min per 1.73 m²)	36.9 (28.6, 42.2)	53.5 (44.5, 64.6)	< 0.0001^*
Urine protein/Cr (mg/mg)	0.40 (0.23, 0.84)	0.22 (0.11, 0.47)	0.010^*
Urine microalbumin/Cr^** (mg/mg)	0.58 (0.27, 1.68)	0.03 (0.01, 0.14)	< 0.0001^*
Serum CO₂ (mmol/L)	20 (18, 20)	22 (20, 25)	0.002^*
Serum phosphate (mg/dL)	4.6 (4.3, 5.1)	4.5 (3.9, 4.8)	0.125
Serum albumin (g/dL)	4.3 (4.2, 4.4)	4.4 (4.3, 4.5)	0.270
Serum hemoglobin (g/dL)	12.4 (11.4, 13.3)	13.2 (12.3, 14.3)	0.020^*
Follow-up duration (years)	4.9 (3.4, 5.9)	6.8 (5.2, 7.7)	< 0.001^*

Controls matched to cases by age at study entry and time on study. Data reported as median (interquartile range) for continuous variables and n (%) for categorical variables

GFR glomerular filtration rate, Cr creatinine, n number

Clinical significance (p < 0.05)

^**

Urine microalbumin/Cr estimated at 3–5 years before matched case