Comparison between the two study periods, one before and one after the abolition of skull radiographs
| Period 1 1998/9 | Period 2 2002/3 | p Value | |
|---|---|---|---|
| *Binomial test; †Fisher’s exact test; ‡Mann-Whitney U test. Percentages are shown in parentheses unless stated otherwise. | |||
| Head injuries <1 year | 181 | 190 | 0.68* |
| Number of male infants | 94 (52) | 98 (52) | 1.00† |
| Age (months) median (IQR) | 7.9 (4.3–9.7) | 7.4 (5.0–9.5) | 0.96‡ |
| Skull fracture on radiograph | 5/140 (3.6) | 3/54 (5.6) | 0.69† |
| Abnormal CT | 2/3 (67) | 1/1 (100) | 0.36† |
| Abnormal US | 2/4 (50) | 2/3 (67) | 1.0† |