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| Characteristic | Total (n=712) | Delayed group (n=105) | Nondelayed group (n=607) | P value |
|---|---|---|---|---|
| Age (yr) | 0.463 | |||
| 0–2 | 6 (0.8) | 2 (1.9) | 4 (0.6) | |
| 3–6 | 52 (7.3) | 9 (8.6) | 43 (7.1) | |
| 7–12 | 308 (43.3) | 44 (41.9) | 264 (43.5) | |
| 13–18 | 346 (48.6) | 50 (47.6) | 296 (48.8) | |
| Male sex | 440 (62) | 58 (55) | 382 (63) | 0.134 |
| Body mass index (kg/m2) | 19.89±0.44 | 19.05±0.35 | 20.03±0.51 | 0.419 |
Values are presented as number (%) or mean±standard deviation.
