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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