Frequency and characteristics of injury events according to the retrospective and prospective methods; results are number (%)
| Variable | Retrospective study | Prospective study | Ratio between retrospective and prospective results |
|---|---|---|---|
| Percentages may exceed 100% since some injury events were due to more than one mechanism or lead to more than one type of injury. | |||
| *Using as the denominator the number of children studied; χ2 = 98.36, p<0.001. | |||
| †Using as the denominator the total number of injury events reported. | |||
| **p<0.001; ***p=0.01. | |||
| Number of injuries* | |||
| None | 491 (79.2) | 320 (51.6) | – |
| 1 | 115 (18.5) | 141 (22.7) | – |
| 2 | 13 (2.1) | 85 (13.7) | – |
| ≥3 | 1 (0.2) | 74 (12.0) | – |
| Total number of children | 620 (100.0) | 620 (100.0) | |
| Injury mechanism† | |||
| Falls | 102 (70.3) | 253 (84.3)** | 0.40 |
| Collision with object | 19 (13.0) | 66 (22.0) | 0.29 |
| Cutting objects | 9 (6.2) | 67 (22.3) | 0.13 |
| Burns | 4 (2.8) | 17 (5.6) | 0.24 |
| Animal bites | 3 (2.1) | 17 (5.6) | 0.18 |
| Other | 16 (11.0) | 61 (20.3) | 0.26 |
| Total number of injuries | 145 | 715 | |
| Type of injury† | |||
| Bruises/abrasions | 67(46.2) | 206 (68.7)** | 0.33 |
| Cuts | 28(19.3) | 67 (22.3)** | 0.42 |
| Haematomas/concussions | 29 (20.0) | 87 (29.0)*** | 0.33 |
| Burns | 4 (2.1) | 17 (5.6) | 0.24 |
| Others | 11 (7.6) | 41 (13.6) | 0.27 |
| Total number of injuries | 145 | 715 | |