Ryan R, Christopher K, Aditya Y, et al. - This study was attempted to assess factors associated with prolonged opioid use after arthroscopic knee surgery and to distinguish relationships between preoperative usage and postoperative complications. Researchers carried out to search MarketScan commercial database to distinguish individuals who had undergone arthroscopic knee surgery from 2005-2014 (based on CPT code). Using multivariable logistic regression analysis, adjusted odds ratios and 95% Confidence Intervals were estimated to ascertain factors correlated with prolonged postoperative opioid use. The study distinguished 1,012,486 patients who had undergone arthroscopic knee surgery and they ascertained which of these patients were on pre-operative opioids. The data indicated that individuals taking opioids 1-3 months prior to arthroscopic knee surgery have an elevated risk of postoperative use. The data demonstrated that chronic opioid use, chronic pain, or use of non-narcotic medications have the highest risk of postoperative opioid use. Finally, there was an association between preoperative and elevated risk of 90-day readmission.