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Table 1 Population Description and Anthropometric Data

From: Low agreement between modified-Schwartz and CKD-EPI eGFR in young adults: a retrospective longitudinal cohort study

Variable Mean (SD) or n (%) Missing values n
Type of Kidney Disease   0
 Glomerular 151 (62)  
 Non-Glomerular 91 (38)  
Stage of Kidney Disease at first height value (by Schwartz)   26a
 Stage 1 49 (23)  
 Stage 2 65 (30)  
 Stage 3 63 (29)  
 Stage 4 24 (11)  
 Stage 5 15 (7)  
Gender   0
 Male 134 (55)  
 Female 108 (45)  
Race   2
 African-American 93 (38)  
 Non-African American 147 (62)  
Age at cohort entry (years)   0
 Mean (SD) 14.6 (4.4)  
 Median (IQR) 13.6 (11.4, 16.3)  
Follow-up duration (years)   11b
 Mean (SD) 4.5 (3.3)  
 Median (IQR) 4.0 (1.4, 6.3)  
BMI at first possible calculation   9
 Z-score if < age 18 (n = 207) 0.91 (1.14)  
 BMI if > = age 18 (n = 36) 26.1 (6.7)  
Height   9
 Z-score (at first height) 0.08 (1.27)  
Total eGFR measures across all patients 4094  
 Age 10–15 1702 (41.6)  
 Age 15–20 1715 (41.9)  
 Age 20–25 715 (17.5)  
 Age 25–30 549 (13.4)  
  1. aThese patients contributed only to the smoothed population curve for CKDEPI
  2. bGenerally patients contributing 1 measurement to the data set