Table 1.
Distribution of Initial Distal Forearm Fractures by Type and Cause Among Olmsted County, MN Children (1086 Boys and 690 Girls) in 1935–1992
| Boys
|
Girls
|
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Age at forearm fracture
|
Age at forearm fracture
|
|||||||||
| Total | <9 years | 9–11 years | 12–14 years | 15–18 years | Total | <9 years | 9–11 years | 12–14 years | 15–18 years | |
| Subjects [fractures], n | 1086 [1110] | 337 [345] | 259 [268] | 299 [304] | 191 [193] | 690 [702] | 283 [286] | 240 [246] | 107 [110] | 60 [60] |
| Age, years, mean ± SD | 11 ± 4 | 6 ± 2 | 11 ± 1 | 13 ± 1 | 16 ± 1 | 10 ± 4 | 6 ± 2 | 10 ± 1 | 13 ± 1 | 17 ± 1 |
| Fracture site, n (%) | ||||||||||
| Radius | 620 (55.9) | 182 (52.8) | 161 (60.1) | 169 (55.6) | 108 (56.0) | 424 (60.4) | 161 (56.3) | 154 (62.6) | 69 (62.7) | 40 (66.7) |
| Ulna | 46 (4.1) | 11 (3.2) | 7 (2.6) | 15 (4.9) | 13 (6.7) | 26 (3.7) | 10 (3.5) | 5 (2.0) | 6 (5.5) | 5 (8.3) |
| Both | 440 (39.6) | 151 (43.8) | 98 (36.6) | 120 (39.5) | 71 (36.8) | 251 (35.8) | 114 (39.9) | 87 (35.4) | 35 (31.8) | 15 (25.0) |
| Uncertain | 4 (0.4) | 1 (0.3) | 2 (0.7) | 0 (0) | 1 (0.5) | 1 (0.1) | 1 (0.3) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| Fracture side, n (%) | ||||||||||
| Right | 464 (42.7) | 160 (47.5) | 107 (41.3) | 116 (38.8) | 81 (42.4) | 284 (41.2) | 133 (47.0) | 94 (39.2) | 36 (33.6) | 21 (35.0) |
| Left | 596 (54.9) | 168 (49.9) | 143 (55.2) | 177 (59.2) | 108 (56.5) | 389 (56.4) | 145 (51.2) | 139 (57.9) | 68 (63.6) | 37 (61.7) |
| Bilateral | 24 (2.2) | 8 (2.4) | 9 (3.5) | 5 (1.7) | 2 (1.0) | 12 (1.7) | 3 (1.1) | 6 (2.5) | 3 (2.8) | 0 (0.0) |
| Uncertain | 2 (0.2) | 1 (0.3) | 0 (0.0) | 1 (0.3) | 0 (0.0) | 5 (0.7) | 2 (0.7) | 1 (0.4) | 0 (0.0) | 2 (3.3) |
| Greenstick/torus/buckle, n (%) | ||||||||||
| Yes | 404 (37.2) | 155 (46.0) | 111 (42.9) | 99 (33.1) | 39 (20.4) | 324 (47.0) | 158 (48.8) | 118 (49.2) | 40 (37.4) | 8 (13.3) |
| No | 659 (60.7) | 171 (50.7) | 141 (54.4) | 196 (65.6) | 151 (79.1) | 356 (51.6) | 122 (43.1) | 117 (48.8) | 66 (61.7) | 51 (85.0) |
| Uncertain | 23 (2.1) | 11 (3.3) | 7 (2.7) | 4 (1.3) | 1 (0.5) | 10 (1.4) | 3 (1.1) | 5 (2.1) | 1 (0.9) | 1 (1.7) |
| Fracture etiology, n (%) | ||||||||||
| MVA | 63 (5.8) | 3 (0.9) | 3 (3.1) | 15 (5.0) | 37 (19.4) | 13 (1.9) | 4 (1.4) | 1 (0.4) | 1 (0.9) | 7 (11.7) |
| Fall >standing | 134 (12.3) | 67 (19.9) | 33 (12.7) | 21 (7.0) | 13 (6.8) | 60 (8.7) | 38 (13.4) | 11 (4.6) | 7 (6.5) | 4 (6.7) |
| Fall ≤ standing | 142 (13.1) | 58 (17.2) | 29 (11.2) | 41 (13.7) | 14 (7.3) | 140 (20.3) | 65 (23.0) | 48 (20.0) | 18 (16.8) | 9 (15.0) |
| Recreational | 624 (57.5) | 167 (49.6) | 152 (58.7) | 196 (65.6) | 109 (57.1) | 385 (55.8) | 136 (48.1) | 151 (62.9) | 67 (62.6) | 31 (51.7) |
| Other | 38 (3.5) | 10 (3.0) | 9 (3.5) | 6 (2.0) | 13 (6.8) | 23 (3.3) | 7 (2.5) | 6 (2.5) | 7 (6.5) | 3 (5.0) |
| Unknown | 85 (7.8) | 32 (9.5) | 28 (10.8) | 20 (6.7) | 5 (2.6) | 69 (10.0) | 33 (11.7) | 23 (9.6) | 7 (6.5) | 6 (10.0) |
| Precipitating trauma, n (%) | ||||||||||
| High energy | 713 (65.7) | 207 (61.4) | 174 (67.2) | 195 (65.2) | 137 (71.7) | 387 (56.1) | 155 (54.8) | 124 (51.7) | 69 (64.5) | 39 (65.0) |
| Lower energy | 288 (26.5) | 98 (29.1) | 57 (22.0) | 84 (28.1) | 49 (25.7) | 234 (33.9) | 95 (33.6) | 93 (38.8) | 31 (29.0) | 15 (25.0) |
| Unknown | 85 (7.8) | 32 (9.5) | 28 (10.8) | 20 (6.7) | 5 (2.6) | 69 (10.0) | 33 (11.7) | 23 (9.6) | 7 (6.5) | 6 (10.0) |
Note that some statistics reflect the number of children whereas others are based on the number of fractures.