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Table 1 Comparison between positive (MA(+)) and negative (MA(−)) methamphetamine drug screens

From: Evaluation of the effect of methamphetamine on traumatic injury complications and outcomes

  MA(+)
n = 449
MA(−)
n = 449
p value
Age 34.18 ± 10.75 34.23 ± 11.1 0.9367
Gender    0.6736
 Female 90 (20%) 85 (18.9%)  
 Male 359 (80%) 364 (81.1%)  
Mechanism of Injury    0.6116
 Blunt 309 (68.8%) 316 (70.4%)  
 Penetrating 140 (31.2%) 133 (29.6%)  
Injury severity score 14.76 ± 10.86 14.72 ± 10.7 0.9548
Hospital Mortality    0.5577
 Alive 434 (96.7%) 437 (97.3%)  
 Dead 15 (3.3%) 12 (2.7%)  
Blood product    0.2452
 No blood product received (n) 351 (78.2%) 365 (81.3%)  
 Any Blood product received (n) 98 (21.8%) 84 (18.7%)  
Units of Total amount of blood product received (mL) 2053.65 ± 2824.25 2480.64 ± 3383.46 0.3547
Median Hospital LOS in days (Q1, Q3) 4 (2, 8) 3 (1, 7) 0.0001
Pulse on scene 102.6 ± 22.06 94.31 ± 20.97 < 0.0001
SBP on scene 126.89 ± 26.9 131.52 ± 24.34 0.0149
DBP on scene 83.31 ± 18.29 85.23 ± 19.73 0.2537
Pulse on arrival to the trauma center 99.96 ± 22.76 94 ± 20.61 < 0.0001
SBP on arrival to the trauma center 139.78 ± 25.92 141.25 ± 24.46 0.3823
DBP on arrival to the trauma center 86.59 ± 20.19 87.03 ± 19.48 0.7449
  1. * MA(−) = a triple negative urine drug screen for methamphetamine, cocaine, and cannabis as well as serum ethanol level < 0 mg/dL matched to the MA(+) group via propensity score matching. MA(+) = a positive urine drug screen for methamphetamine, and negative for cocaine or cannabis as well as serum ethanol level < 0 mg/dL
  2. ** All continuous values were presented as mean ± SD or median (Q1, Q3) for hospital LOS. Categorical variables were presented as frequency with column percentages inside the parenthesis
  3. *** LOS length of stay, SBP systolic blood pressure, DBP diastolic blood pressure