TABLE 1.
Hospitalizations
|
ED visits
|
|||||
---|---|---|---|---|---|---|
NHDS | HCUP-NIS | CR (95% CI) | NHAMCS | HCUP-NEDS | CR (95% CI) | |
Sex | ||||||
Male | 172 252 | 178 941 | 0.96 (0.87–1.06) | 1 020 043 | 983 147 | 1.04 (0.90–1.17) |
Female | 116 910 | 114 454 | 1.02 (0.93–1.11) | 774 774 | 824 902 | 0.94 (0.81–1.07) |
Unknown | 1249 | a | ||||
Age group | ||||||
0–4 y | 13 382 | 11 341 | 1.18 (0.90–1.46) | 343 789 | 262 614 | 1.31 (1.07–1.55)b |
5–14 y | 13 475 | 12 219 | 1.10 (0.86–1.34) | 289 743 | 253 826 | 1.14 (0.91–1.38) |
15–24 y | 40 673 | 41 663 | 0.98 (0.83–1.12) | 364 665 | 372 139 | 0.98 (0.83–1.13) |
25–44 y | 59 687 | 59 391 | 1.00 (0.87–1.14) | 340 808 | 378 367 | 0.90 (0.75–1.06) |
45–64 y | 64 970 | 65 303 | 0.99 (0.88–1.11) | 242 524 | 269 489 | 0.90 (0.76–1.04) |
65+ y | 96 974 | 104 193 | 0.93 (0.85–1.01) | 213 288 | 272 280 | 0.78 (0.64–0.92)b |
Age not specified | 534 | 171 | ||||
ICD-9-CM nature of injury code range | ||||||
800–801, 803–804 (fractures of the skull) | 64 492 | 63 049 | 1.02 (0.89–1.16) | 30 223c | 41 162 | d |
850.0–854.1 (intracranial injury) | 190 831 | 197 648 | 0.97 (0.87–1.06) | 419 962 | 540 691 | 0.78 (0.65–0.90)b |
995.55 (shaken baby syndrome) | e | 470 | d | 242 | ||
959.01 (unspecified head injury) | 35 548 | 36 676 | 0.97 (0.85–1.09) | 1 383 410 | 1 251 376 | 1.11 (0.95–1.26) |
Totalf | 289 162 | 294 644 | 0.98 (0.90–1.06) | 1 794 817 | 1 808 886 | 0.99 (0.87–1.11) |
Abbreviations: CI indicates confidence interval; CR, comparability ratio; ED, emergency department; HCUP-NEDS, Healthcare Cost and Utilization Project Nationwide Emergency Department Sample; HCUP-NIS, Healthcare Cost and Utilization Project Nationwide Inpatient Sample; ICD-9-CM, International Classification of Diseases, Ninth Revision, Clinical Modification; NHAMCS, National Hospital Ambulatory Medical Care Survey; NHDS, National Hospital Discharge Survey.
The relative standard error was more than 30% or the standard error = 0; the value of the estimate was considered unreliable and was not reported.
The 95% confidence interval did not include 1. Estimates were not comparable between data sets.
Sample size was 30–59; the value of the estimate was reported but should not be assumed reliable.
Comparability ratios were not calculated if estimate was considered unreliable or potentially unreliable.
Sample size was less than 30 or the relative standard error was more than 30%; the value of the estimate was considered unreliable and was not reported.
Category-level code counts do not directly sum to the total counts, as records may include more than 1 traumatic brain injury–related diagnosis. Total counts include optic nerve injuries that were rare and present only in HCUP-NIS and HCUP-NEDS.