Table 3.
Mechanism of injury, mean age, gender distribution and AO/OTA type of humeral fractures
| AO/OTA type, % | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Mechanism of injury | N (%) | Open N | Mean age | >50 years, N (%) | Women, % | A | B | C | |
| Prox | Simple fall | 932 (59.0) | 0 | 71.0 | 853 (91.5) | 77.7 | 44.4 | 43.7 | 11.9 |
| Unspecified fall | 284 (18.0) | 2 | 69.1 | 254 (89.4) | 73.6 | 43.3 | 48.6 | 8.1 | |
| Fall from height | 162 (10.3) | 1 | 68.5 | 141(87.0) | 71.6 | 40.7 | 48.8 | 10.5 | |
| Traffic | 89 (5.6) | 0 | 56.6 | 56 (62.9) | 58.4 | 40.4 | 48.3 | 11.2 | |
| Miscellaneous | 107 (6.8) | 0 | 49.9 | 54 (50.5) | 50.0 | 63.6 | 24.3 | 12.1 | |
| Pathological | 5 (0.3) | 0 | 75.0 | 5 (100) | 60.0 | 60.0 | 20.0 | 20.0 | |
| Total | 1579 (100) | 3 | 68.2 | 1363 (86.3) | 73.3 | 44.9 | 44.0 | 11.1 | |
| Shaft | Simple fall | 107 (41.3) | 1 | 66.4 | 89 (83.2) | 69.2 | 54.2 | 28.0 | 17.8 |
| Unspecified fall | 32 (12.4) | 1 | 68.8 | 29 (90.6) | 59.4 | 53.1 | 15.6 | 31.3 | |
| Fall from height | 35 (13.5) | 2 | 63.4 | 25 (71.4) | 54.3 | 51.4 | 22.9 | 25.7 | |
| Traffic | 20 (7.7) | 1 | 40.6 | 4 (20.0) | 40.0 | 65.0 | 25.0 | 10.0 | |
| Miscellaneous | 46 (17.8) | 1 | 38.2 | 13 (28.3) | 32.6 | 58.7 | 37.0 | 4.3 | |
| Pathological | 19 (7.3) | 0 | 71.5 | 18 (94.7) | 26.3 | 100 | 0 | 0 | |
| Total | 259 (100) | 6 | 59.5 | 178 (68.7) | 53.8 | 58.4 | 25.6 | 16.0 | |
| Dist. | Simple fall | 93 (55.7) | 5 | 71.3 | 84 (90.3) | 79.6 | 39.8 | 31.2 | 29.0 |
| Unspecified fall | 21 (12.6) | 3 | 73.0 | 20 (95.2) | 81.0 | 42.9 | 14.3 | 42.9 | |
| Fall from height | 18 (10.8) | 4 | 59.4 | 12 (66.7) | 68.4 | 22.2 | 27.8 | 50.0 | |
| Traffic | 13 (7.8) | 3 | 62.0 | 9 (69.2) | 53.8 | 38.5 | 15.4 | 46.2 | |
| Miscellaneous | 19 (11.4) | 1 | 35.2 | 4 (21.1) | 42.1 | 52.6 | 15.8 | 31.6 | |
| Pathological | 3 (1.8) | 0 | 71.7 | 3 (100) | 66.7 | 66.7 | 0 | 33.3 | |
| Total | 167 (100.1) | 16 | 65.4 | 132 (79.0) | 71.9 | 40.1 | 25.1 | 34.1 | |
| All | Simple fall | 1132 (56.5) | 6 | 70.6 | 1026 (90.6) | 77.0 | 45.0 | 41.2 | 13.9 |
| Unspecified fall | 337 (16.8) | 6 | 69.3 | 303 (89.9) | 72.7 | 44.2 | 43.3 | 12.5 | |
| Fall from height | 215 (10.7) | 7 | 66.9 | 178 (82.8) | 68.4 | 40.9 | 42.8 | 16.3 | |
| Traffic | 122 (6.1) | 4 | 54.6 | 69 (56.6) | 54.9 | 44.3 | 41.0 | 14.8 | |
| Miscellaneous | 172 (8.6) | 2 | 45.2 | 71 (41.3) | 44.8 | 61.0 | 26.7 | 12.2 | |
| Pathological | 27 (1.3) | 0 | 72.2 | 26 (96.3) | 37.0 | 88.9 | 3.7 | 7.4 | |
| Totala | 2005 (100) | 25 | 66.8 | 1673 (83.4) | 70.7 | 46.3 | 40.0 | 13.6 | |
aData on the mechanism of injury were available in 2,005 fractures. Data on three fractures in the proximal segment and three fractures in the shaft segment were missing