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Table 1 Characteristics of study population according to return to work within 1 year

From: Mortality and return to work in patients transported by emergency ambulance after involvement in a traffic accident

Variable   RTW No RTW Dead Total (n = 6072) P
Age 18–29 2712 (48.2) 76 (21.5) 25 (28.4) 2813 (46.3)  
  30–39 1087 (19.3) 85 (24.0) 11 (12.5) 1183 (19.5)  
  40–49 923 (16.4) 83 (23.4) 19 (21.6) 1025 (16.9)  
  50–59 737 (13.1) 67 (18.9) 22 (25.0) 826 (13.6)  
  60–65 171 (3.0) 43 (12.1) 11 (12.5) 225 (3.7) < 0.01
Sex* Male 3219 (57.2) 209 (59.0) 69 (78.4) 3497 (57.6) < 0.01
Socioeconomic statusa 1 2413 (42.9) 179 42 2634 (43.4)  
  2 2229 (39.6) 129 35 2393 (39.4)  
  3 733 (13.0) 28 10 771 (12.7) 0.018
  missing 255 (4.5) ≤20 ≤3   
Charlson score 0 5534 (98.3) 326 (92.1) 82 (93.2) 5942 (97.9)  
  > 0 96 (1.7) 28 (7.9) 6 (6.8) 130 (2.1) < 0.01
Dispatch priority 1 5442 (96.7) 332 (93.8) 88 (100.0) 5862 (96.5)  
to accidentb 2 188 (3.3) 22 (6.2) 0 (0.0) 210 (3.5) < 0.01
Return to 0 186 (3.4) 6 (1.7) 8 (9.3) 200 (3.3)  
hospital priortyb 1 1289 (23.3) 125 36 1450 (24.3)  
  2 4064 (73.4) 216 42 4322 (72.4) < 0.01
  missing 91 < 10 < 10   
Admitted to ICU¤ Yes 2469 (4.8) 39 (11) 9 (10.2) 317 (5.2) < 0.01
LoS¤ > 1 day Yes 658 (11.7) 100 (28.2) 9 (10.2) 767 (12.6) < 0.01
1- day mortality Yes ≤3 ≤3 59 (67.0) 59 (0.97) < 0.01
30- day mortality Yes ≤3 ≤3 73 (83.0) 76 (1.3) < 0.01
  1. ¤Abbreviations: ICU = Intensive care unit, LoS = Length of Stay; *count and column percentage (%).aInternational Standard Classification of Education (ISCED), group 1 = ISCED 0–2, group 2 = ISCED 3–5, group 3 = ISCED 6–8.bDispatch priority is grouped by level of emergency, 1 being an emergent dispatch and 2 being only sub-emergent. Priority 0 is “no-return journey” and most likely account for cases where patients were able to transport themselves to the receiving hospital. In some columns percentages was left out, and small numbers masked to avoid risk of identifying individuals