Table 1

Characteristics of TARN patients by time of presentation

 DayNight
WeekWeekendTotalp ValueWeekWeekendTotalp Value
Patients14 711600020 711<0.001*15 79912 56028 359<0.001*
Age†54.1 (24.4)53.2 (24.5)53.9 (24.5)0.010‡48.2 (24.8)47.6 (24.6)47.9 (24.7)0.045‡
Sex
 Male9204 (62.6%)3783 (63.1%)12 987 (62.7%)0.523*10 546 (66.8%)8545 (68.0%)19 091 (67.3%)0.023*
 Female5507 (37.4%)2217 (37.0%)7724 (37.3%)5253 (33.2%)4015 (32.0%)9268 (32.7%)
Mechanism of injury
 Vehicle incident4324 (29.4%)1882 (31.4%)6206 (30.0%)0.014*4893 (31.0%)3944 (31.4%)8837 (31.2%)0.302*
 Fall from >2 m2573 (17.5%)1083 (18.1%)3656 (17.7%)2648 (16.8%)2099 (16.7%)4747 (16.7%)
 Fall from ≤2 m6055 (41.2%)2332 (38.9%)8387 (40.5%)5641 (35.7%)4356 (34.7%)9997 (35.3%)
 Shooting/stabbing397 (2.7%)150 (2.5%)547 (2.6%)943 (6.0%)803 (6.4%)1746 (6.2%)
 Other1362 (9.3%)553 (9.2%)1915 (9.2%)1674 (10.6%)1358 (10.8%)3032 (10.7%)
Highest AIS body region
 Head3707 (25.2%)1531 (25.5%)5238 (25.3%)0.891*4693 (29.7%)3912 (31.2%)8605 (30.3%)0.107*
 Chest2305 (15.7%)926 (15.4%)3231 (15.6%)2414 (15.3%)1916 (15.3%)4330 (15.3%)
 Abdomen425 (2.9%)175 (2.9%)600 (2.9%)700 (4.4%)515 (4.1%)1215 (4.3%)
 Limbs4577 (31.1%)1850 (30.8%)6427 (31.0%)4223 (26.7%)3294 (26.2%)7517 (26.5%)
 Spine1700 (11.6%)711 (11.9%)2411 (11.6%)1678 (10.6%)1281 (10.2%)2959 (10.4%)
 Multiple1635 (11.1%)645 (10.8%)2280 (11.0%)1690 (10.7%)1298 (10.3%)2988 (10.5%)
 Other361 (2.5%)162 (2.7%)523 (2.5%)400 (2.5%)344 (2.7%)744 (2.6%)
Vital signs
 SBP (mm Hg)§136 (120–154)135 (119–154)136 (120–154)0.079¶133 (118–151)132 (117–150)133 (117–150)0.006¶
 SBP ≤90 mm Hg (%)473 (3.2%)193 (3.2%)666 (3.2%)0.996*546 (3.5%)460 (3.7%)1006 (3.5%)0.367*
 HR ≥100 bpm (%)2751 (18.7%)1138 (19.0%)3889 (18.8%)0.670*3081 (19.5%)2573 (20.5%)5654 (19.9%)0.041*
 GCS§15 (14–15)15 (14–15)15 (14–15)0.278¶15 (14–15)15 (14–15)15 (14–15)0.313¶
 GCS ≤8 (%)1236 (8.4%)523 (8.7%)1759 (8.5%)0.478*1612 (10.2%)1284 (10.2%)2896 (10.2%)0.972*
 ISS§10 (9–21)10 (9–21)10 (9–21)0.789¶13 (9–25)14 (9–25)13 (9–25)0.668¶
ISS ≥15 (%)6186 (42.1%)2524 (42.1%)8710 (42.1%)0.995*7528 (47.6%)6010 (47.9%)13 538 (47.7%)0.745*
Injury type
Penetrating503 (3.4%)184 (3.1%)687 (3.3%)0.214*1037 (6.6%)910 (7.2%)1947 (6.9%)0.026*
Blunt14 208 (96.6%)5816 (97.9)20 024 (96.7%)14 762 (93.4%)11 650 (92.8%)26 412 (93.1%)
Air ambulance1983 (13.5%)881 (14.7%)2864 (13.8%)0.024*872 (5.5%)665 (5.3%)1537 (5.4%)0.421*
  • 2 test (Yates’ correction). †Mean (SD).

  • ‡t-Test.

  • §Median (IQRs).

  • ¶Mann-Whitney test.

  • AIS, Abbreviated Injury Scale; ISS, Injury Severity Score; SBP, Systolic BP; TARN, Trauma Audit & Research Network.