| Summary: | **Background:** Approximately 60% of hospitalized children undergoing surgery experience at least 1 day of moderate-to-severe pain after surgery. Pain following spine surgery may affect opioid exposure, length of stay (LOS), and costs in hospitalized pediatric patients. This is a retrospective cohort analysis of pediatric patients undergoing inpatient primary spine surgery.
**Objectives:** To examine the association of opioid-related and economic outcomes with postsurgical liposomal bupivacaine (LB) or non-LB analgesia in pediatric patients who received spine surgery.
**Methods:** Premier Healthcare Database records (January 2015–September 2019) for patients aged 1–17 years undergoing inpatient primary spine surgery were retrospectively analyzed. Outcomes included in-hospital postsurgical opioid consumption (morphine milligram equivalents [MMEs]), opioid-related adverse events (ORAEs), LOS (days), and total hospital costs. A generalized linear model adjusting for baseline characteristics was used.
**Results:** Among 10 189 pediatric patients, the LB cohort (n=373) consumed significantly fewer postsurgical opioids than the non-LB cohort (n=9816; adjusted MME ratio, 0.53 [95% confidence interval (CI), 0.45–0.61]; P<0.0001). LOS was significantly shorter in the LB versus non-LB cohort (adjusted rate ratio, 0.86 [95% CI, 0.80–0.94]; P=0.0003). Hospital costs were significantly lower in the LB versus non-LB cohort overall (adjusted rate ratio, 0.92 [95% CI, 0.86–0.99]; P=0.0227) mostly because of decreased LOS and central supply costs. ORAEs were not significantly different between groups (adjusted rate ratio, 0.84 [95% CI, 0.65–1.08]; P=0.1791).
**Discussion:** LB analgesia was associated with shorter LOS and lower hospital costs compared with non-LB analgesia in pediatric patients undergoing spine surgery. The LB cohort had lower adjusted room and board and central supply costs than the non-LB cohort. These data suggest that treatment with LB might reduce hospital LOS and subsequently health-care costs, and additional cost savings outside the hospital room may factor into overall health-care cost savings. LB may reduce pain and the need for supplemental postsurgical opioids, thus reducing pain and opioid-associated expenses while improving patient satisfaction with postsurgical care.
**Conclusions:** Pediatric patients undergoing spine surgery who received LB had significantly reduced in-hospital postsurgical opioid consumption, LOS, and hospital costs compared with those who did not.
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