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Table 2 Characteristics of subjects from NTDB, NVDRS, and the combined sample

From: The effect of hospital care on early survival after penetrating trauma

  NTDB NVDRS Combined
Cases not excluded 58,399 13,955 72,354
 Age 0 to 39 48,065 (82.3%) 9,257 (66.3%) 57,322 (79.2%)
 Age 40 to 64 9,813 (16.8%) 3,972 (28.5%) 13,785 (19.1%)
 Age 65-79 452 (0.8%) 538 (3.9%) 990 (1.4%)
 Age 80 or more 69 (0.1%) 163 (1.2%) 232 (0.3%)
 Male 52,698 (90.3%) 10,482 (75.1%) 63,180 (87.3%)
 Female 5,526 (9.5%) 3,473 (24.9%) 8,999 (12.4%)
 Firearm mechanism 38,994 (66.8%) 11,322 (81.1%) 50,316 (69.5%)
 Non-firearm mechanism 19,405 (33.2%) 2,633 (18.9%) 22,308 (30.5%)
 Head/neck injury 15,659 (26.8%) 7,743 (55.5%) 23,402 (32.3%)
 Trunk injury 43,218 (74.0%) 7,630 (54.7%) 50,848 (70.3%)
 No head/neck/trunk injury 8,690 (14.9%) 1,690 (12.1%) 10,380 (14.4%)
 Level I trauma center 25,534 (43.7%) 0 25,534 (35.3%)
 Died 8,540 (14.7%) 13,955 (100%) 22,495 (31.1%)
Cases included with valid/non-missing data 29,008 4,824 33,832
 Age 0 to 39 23,426 (80.8%) 3,277 (67.9%) 26,703 (78.9%)
 Age 40 to 64 5,307 (18.3%) 1,335 (27.7%) 6,642 (19.6%)
 Age 65 to 79 242 (0.8%) 164 (3.4%) 406 (1.2%)
 Age 80 or more 33 (0.1%) 46 (1.0%) 79 (0.2%)
 Male 26,088 (90.0%) 3,651 (75.7%) 29,739 (87.9%)
 Female 2,915 (10.1%) 1,173 (24.3%) 4,088 (12.1%)
 Firearm mechanism 19,755 (68.1%) 4,051 (84.0%) 23,806 (70.4%)
 Non-firearm mechanism 9,253 (31.9%) 773 (16.0%) 10,026 (29.6%)
 Head/neck injury 7,753 (26.7%) 2,524 (52.3%) 10,277 (30.4%)
 Trunk injury 21,854 (75.3%) 2,607 (54.0%) 24,461 (72.3%)
 No head/neck/trunk injury 4,178 (14.4%) 693 (14.4%) 4,871 (14.4%)
 Level I trauma center 12,450 (42.9%) 0 12,450 (36.8%)
 Died 4,547 (15.7%) 4,824 (100%) 9,371 (27.7%)
 Died < 240 min 3,725 (12.8%) 3,583 (74.3%) 7,308 (21.6%)
  1. Cases with Injury Severity Score less than 9 or received in transfer from another hospital were excluded from NTDB data. Cases admitted to a hospital were excluded from NVDRS data.