Limitations
PTSD
CHRONIC PAIN
This study has several limitations that deserve mention. First, the 8.3% of patients unavailable during the 1-month follow-up might have resulted in statistical limitations of the PTSD incidence. Second, the population in this study was relatively narrow because of the use of strict inclusion and exclusion criteria. However, the strict inclusion and exclusion criteria in this study were based on a combination of safety and interference factors. Third, a previous study suggested that PTSD was associated with chronic pain.