Table 3.
Causes | Infancy, <1 y, no. (%) | Preschool, 1–5 y, no. (%) | Preteen, 6–12 y, no. (%) | Teen 13–19 y, no. (%) |
---|---|---|---|---|
No. of patients | 23 | 41 | 99 | 112 |
Essential | 0 (0) | 8 (20) | 56 (57) | 55 (49) |
Secondary | 23 (100) | 33 (80) | 43 (43) | 57 (51) |
Autoimmune | 0 (0) | 0 (0) | 2 (5) | 1 (2) |
Cardiac | 0 (0) | 3 (9) | 1 (2) | 0 (0) |
Endocrine | 0 (0) | 0 (0) | 4 (9) | 5 (9) |
Gastrointestinal | 2 (9) | 0 (0) | 0 (0) | 0 (0) |
Hematological | 0 (0) | 0 (0) | 1 (2) | 0 (0) |
Medications | 2 (9) | 3 (9) | 4 (9) | 12 (21) |
Neurological | 2 (9) | 3 (9) | 7 (16) | 7 (12) |
Renal | 3 (13) | 11 (34) | 17 (39) | 22 (39) |
Respiratory | 14 (60) | 12 (36) | 4 (9) | 2 (3) |
Sleep disordered breathing | 0 (0) | 1 (3) | 3 (12) | 8 (14) |