Table 1.

Demographic characteristics of study participants ≥6 years of age (n = 368)

CharacteristicValue
Age (median, IQR)13 (10, 15)
    6 to 9 years (n = 102)
    10 to 13 years (n = 123)
    14 to 17 years (n = 143)
Male (%, n)59% (217)
Race (%, n)
    Caucasian69% (255)
    African American14% (53)
    Asian2% (8)
    other14% (51)
Hispanic ethnicity (%, n)14% (50)
Maternal education (median, IQR)14 (12, 16)
    High school or less (%, n)41% (149)
    13 to 15 years of education (%, n)27% (99)
    ≥16 years of education (%, n)31% (114)
Primary CKD diagnosis (%, n)
    Glomerular (e.g. focal segmental glomerulosclerosis)26% (94)
    Nonglomerular (e.g. obstructive uropathy)74% (274)
CKD duration, years (median, IQR)8 (4, 12)
% of life with CKD (median, IQR)88% (34, 99)
Iohexol-based GFR, ml/min per 1.73 m2 (median, IQR)43 (33, 54)
Elevated proteinuria (>2 SDs) (%, n)15% (54)
Anemia (%, n)43% (154)
Hypertension (%, n)51% (187)
Low birth weight (<2500 g) (%, n)18% (65)
Learning disability (%, n)15% (55)
ADHD by parent report (%, n)12% (43)
Seizures (%, n)12% (43)
  • IQR, interquartile range; CKD, chronic kidney disease; ADHD, attention deficit and hyperactivity disorder.