Table 1.
Characteristics of study population (215 person-visits)
| Characteristic | Median (IQ) or n (%) |
|---|---|
| Visit 2 (1 year after initial enrollment in CKiD) | 104 (48.4) |
| Visit 4 (3 years after initial enrollment in CKiD) | 74 (34.4) |
| Visit 6 (5 years after initial enrollment in CKiD) | 37 (17.2) |
| Number of children with two visits | 43 (30) |
| Number of children with three visits | 14 (10) |
| Age at visit (years) | 12.1 (8.5–15.6) |
| Male gender (of 144 children) | 95 (66) |
| African American race (of 144 children) | 21 (15) |
| Non-glomerular diagnosis (of 144 children) | 135 (93.8 %) |
| Iohexol or estimated GFR | 47.9 (33.7–60.8) |
| Currently hypertensive (by ABPM) | 122 (57) |
| Percent of life with CKD at visit | 76.9 (55.7–99.2) |
| Systolic SD during wake period | 9.70 (8.24–11.26) |
| Systolic SD during sleep period | 7.43 (6.28–9.05) |
| Diastolic SD during wake period | 8.83 (7.91–10.37) |
| Diastolic SD during sleep period | 7.16 (6.22–9.03) |
| HR standard deviation during wake period | 11.64 (9.96–13.84) |
| HR standard deviation during sleep period | 8.65 (6.50–10.42) |
| GFR<30 ml/min/1.73 m2 | 37 (17) |
| GFR 30–59 ml/min/1.73 m2 | 121 (56) |
| GFR≥60 ml/min/1.73 m2 | 57 (27) |
CKiD Chronic Kidney Disease in Children; GFR glomerular filtration rate; ABPM ambulatory blood pressure monitoring; CKD chronic kidney disease; HR heart rate; SD standard deviation