"Our finding that MOUD [Medication for Opioid Use Disorder] treatment with naltrexone was not protective against overdose or serious opioid-related acute care use is consistent with other studies15,35 that found naltrexone to be less effective than MOUD treatment with buprenorphine. The mean (SD) treatment duration for naltrexone in this cohort was longer than prior observational studies at 74.41 (70.15) days. 

"The findings that nonintensive behavioral health treatment was associated with a reduced risk of overdose at 12 months but not 3 months and a reduced risk of opioid-related acute care use was surprising. Although we attempted to control for differences among various treatment groups, individuals referred to nonintensive behavioral health may represent a less complex patient population than those who receive MOUD treatment or are referred to intensive behavioral health or inpatient treatment."

Source

Wakeman SE, Larochelle MR, Ameli O, et al. Comparative Effectiveness of Different Treatment Pathways for Opioid Use Disorder. JAMA Netw Open. 2020;3(2):e1920622. doi:10.1001/jamanetworkopen.2019.20622