Table 1.
Demographics and clinical characteristics
| Pre-HDM | Post-HDM | |
|---|---|---|
| Examination number | 1227 | 1352 |
| Median (range 0–14.9 years) | 2.5 | 2.8 |
| Age class, n (%) | ||
| < 1 year | 341 (27.8%) | 438 (32.4%) |
| 1 to < 5 years | 469 (38.2%) | 489 (36.2%) |
| 5 to < 10 years | 264 (21.5%) | 258 (19.1%) |
| 10 to < 15 years | 153 (12.5%) | 167 (12.4%) |
| Sex, n | ||
| Male, n | 711 | 767 |
| Female, n | 516 | 585 |
| Disease category, n | ||
| Hydrocephalus | 416 (33.9%) | 444 (32.8)% |
| Craniosynostosis | 78 (6.4%) | 115 (8.5%) |
| Others | 733 (59.7%) | 793 (58.7%) |
| Mean number of CT scans (± SD) | ||
| Hydrocephalus | 2.3 ± 2.4 | 2.2 ± 2.4 |
| Craniosynostosis | 1.6 ± 1.4 | 1.7 ± 1.5 |
| Others | 1.4 ± 1.2 | 1.4 ± 1.2 |
HDM, half-dose method, CT computed tomography, SD standard deviation