Page 30 - JSOM Spring 2023

TABLE 2 Multivariable Regression Model Assessing Yearly Deaths for Cricothyrotomy Associated Deaths when Adjusted for ISS
Unadjusted Adjusted*
Odds Ratio Lower Upper Odds Ratio Lower Upper
2008–2007 1.21 0.36 4.05 1.27 0.36 4.41
2009–2008 1.03 0.30 3.54 0.75 0.20 2.78
2010–2009 0.62 0.23 1.69 0.73 0.25 2.11
2011–2010 2.14 0.91 5.15 1.57 0.63 3.92
2012–2011 0.58 0.22 1.51 0.67 0.24 1.85
2013–2012 0.82 0.26 2.49 1.08 0.33 3.44
2014–2013 2.19 0.43 12.15 1.34 0.22 8.27
2015–2014 0.26 0.02 2.34 0.52 0.03 5.55
2016–2015 1.80 0.10 33.81 0.60 0.02 14.86
2017–2016 0.26 0.01 4.31 0.57 0.03 13.10
2018–2017 1.12 0.08 15.85 0.90 0.06 13.70
2019–2018 1.59 0.21 18.56 2.02 0.25 26.21
*ISS = injury severity score

TABLE 3 Multivariable Regression Model Assessing Yearly Deaths for Intubation Associated Deaths when Adjusted for ISS
Unadjusted Adjusted*
Odds Ratio Lower Upper Odds Ratio Lower Upper
2008–2007 0.29 0.16 0.51 0.47 0.26 0.86
2009–2008 1.94 0.97 3.90 1.28 0.62 2.63
2010–2009 0.74 0.41 1.34 0.80 0.43 1.49
2011–2010 1.04 0.66 1.65 0.97 0.61 1.56
2012–2011 0.93 0.54 1.59 1.00 0.57 1.74
2013–2012 1.88 1.00 3.55 2.10 1.09 4.05
2014–2013 1.03 0.46 2.31 0.80 0.34 1.86
2015–2014 1.18 0.26 5.37 1.12 0.21 5.81
2016–2015 0.09 0.00 2.35 0.13 0.00 3.85
2017–2016 4.20 0.04 494.14 2.73 0.02 338.86
2018–2017 1.00 0.01 193.40 2.37 0.01 470.74
2019–2018 1.67 0.03 92.60 0.78 0.01 45.14
*ISS = injury severity score

TABLE 4 Multivariable Regression Model Assessing Yearly Deaths for SGA Associated Deaths when Adjusted for ISS
Unadjusted Adjusted*
Odds Ratio Lower Upper Odds Ratio Lower Upper
2010–2007 1.00 0.00 257.80 0.23 0.00 89.34
2011–2010 5.00 0.15 965.13 5.00 0.15 966.79
2012–2011 0.60 0.04 6.15 1.50 0.10 20.36
2013–2012 1.00 0.20 5.09 0.80 0.12 5.27
2015–2013 5.00 0.32 744.29 6.38 0.33 1,041.84
2017–2015 0.07 0.00 3.29 0.11 0.00 6.28
2018–2017 15.00 0.30 5,804.67 14.96 0.30 5,791.80
2019–2018 0.33 0.00 10.12 0.89 0.00 195.10
*ISS = injury severity score, mechanism of injury

suboptimal compliance with documentation requirements. Conclusion
38
A final, and perhaps the most important limitation, is that
the DoDTR does not adequately separate out prehospital ac- Mortality among casualties undergoing prehospital or emer-
tivity based on location. The personnel, operational threats, gency department airway interventions showed no change
and equipment vary significantly between the point of injury, during the study period, suggesting the accrued experience and
battalion aid station, and en route care—all of which are policy adjustments did not translate to a survival advantage.
combined into one category within the registry. This is both a These findings suggest that training and technology advances
limitation of our study and highlights the need for better data in airway resuscitation are necessary to achieve mortality im-
capture methods prehospital. provements in potentially survivable airway injuries in the pre-
hospital combat setting.

28 | JSOM Volume 23, Edition 1 / Spring 2023