Table 2.
Characteristics of studies found in 3 electronic databases.
| Types of studies | PubMed | LILACS | Embase | TOTAL |
| Studies adequate for systematic review | 8 | 1 | 3 | 12 |
| Studies of treatments and interventions | 197 | 0 | 120 | 317 |
| Studies of protocols and injury severity classification | 285 | 0 | 12 | 297 |
| Studies of other pathologies and specific pathologies in external causes | 172 | 0 | 120 | 292 |
| Studies of preventive measures, risks and predisposition | 127 | 2 | 62 | 191 |
| Case studies | 158 | 0 | 12 | 170 |
| Diagnostic and forensic studies | 78 | 0 | 66 | 144 |
| Studies of specific external causes | 28 | 1 | 81 | 110 |
| Studies of mortality due to other causes | 79 | 0 | 29 | 108 |
| Studies of external causes in specific locations | 70 | 6 | 7 | 83 |
| Studies in specific populations | 59 | 0 | 21 | 80 |
| Studies of intentional external causes | 55 | 0 | 22 | 77 |
| Studies of public health and ethical and legal issues | 56 | 1 | 17 | 74 |
| Studies of assessment of trauma care and pre-hospital care centers | 31 | 0 | 8 | 39 |
| Studies of patient safety | 26 | 0 | 9 | 35 |
| Studies of data collection methods and reporting systems | 15 | 0 | 1 | 16 |
| Studies of death among adults due to external causes | 14 | 0 | 0 | 14 |
| Comments | 14 | 0 | 0 | 14 |
| Studies of all unspecific external causes | 4 | 1 | 5 | 10 |
| Studies of financial costs of external causes | 4 | 0 | 0 | 4 |
| Letters | 4 | 0 | 0 | 4 |