Fig. 1
From: Evaluation of the effect of methamphetamine on traumatic injury complications and outcomes
Patient selection flow chart. *MA(−) = a triple negative drug screen for methamphetamine, cocaine, and cannabis, and serum ethanol level < 0 mg/dL matched to the MA(+) group via propensity score matching. MA(−) was selected to match with MA(+) based on age, gender, ISS, and mechanism of injury. **MA(+) = a positive drug screen for methamphetamine, and negative for cocaine or cannabis, and serum ethanol level < 0 mg/d. ***ISS = injury severity score