Table 1.
Characteristics of head trauma treated in U.S. emergency departments
| Description | Cases (n) | National estimate (%)a | 95 % confidence interval |
|---|---|---|---|
| Gender | |||
| Male | 116,291 | 5,865,536 (54.6) | 4,532,344–7,198,727 |
| Female | 90,850 | 4,880,227 (45.4) | 3,801,087–5,959,367 |
| Unknownc | 18 | b | b |
| Age | |||
| 0–11 | 64,976 | 2,506,502 (23.3) | 1,891,605–3,121,400 |
| 12–17 | 28,749 | 1,284,749 (12.0) | 1,006,639–1,562,859 |
| 18–24 | 22,960 | 1,391,571 (12.9) | 1,006,590–1,776,552 |
| 25–44 | 34,519 | 2,099,395 (19.5) | 1,628,127–2,570,663 |
| 45–64 | 27,415 | 1,656,661 (15.4) | 1,273,498–2,039,825 |
| 65+ | 28,453 | 1,803,832 (16.8) | 1,359,072–2,248,592 |
| Unknown | 87 | b | b |
| Location | |||
| Home | 59,001 | 3,012,637 (28.0) | 2,259,680–3,765,595 |
| School/sports/recreation place | 29,063 | 1,283,775 (11.9) | 983,083–1,584,468 |
| Street | 36,816 | 2,018,501 (18.8) | 1,232,527–2,804,475 |
| Other property | 26,943 | 1,504,002 (14.0) | 1,145,785–1,862,219 |
| Farm | 340 | 28,406 (0.3) | 13,033–43,779 |
| Unknown | 54,996 | 2,899,307 (27.0) | 1,606,967–4,191,646 |
| Disposition | |||
| Treated and released | 169,772 | 8,913,111 (82.9) | 6,964,493–1,0861,729 |
| Admitted/hospitalized | 34,703 | 1,686,349 (15.7) | 1,118,291–2,254,406 |
| AMA | 2626 | 144,948 (1.3) | 88,526–201,370 |
| Unknown | 58 | b | b |
| Traffic-related injury | |||
| Yes | 32,997 | 1,819,824 (16.9) | 1,068,129–2,571,519 |
| No | 5206 | 297,173 (2.8) | 191,099–403,247 |
| Unknown/unspecified | 168,956 | 8,629,631 (80.3) | 6,817,644–10,441,619 |
| Sports-related injury | |||
| Yes | 36,270 1,714,388 | 1,714,388 (16.0) | 1,260,465–2,168,310 |
| No | 147,916 | 7,770,932 (72.3) | 6,037,623–9,504,241 |
| Unknown/unspecified | 22,973 | 1,261,309 (11.7) | 964,750–1,557,868 |
aPercentages may not total to 100 % due to rounding
bEstimate is potentially unstable since unweighted cases <20, national estimate <1200 cases, or coefficient of variation >30.0 %. No CI is provided
cUnknown cases are included in the total estimates of ED visits in the manuscript text