Factors Contributing to Substance Misuse Treatment Completion among Native Hawaiians, Other Pacific Islanders, and Asian Americans.

: Research on substance abuse treatment completion (SATC) among Asian Americans and Native Hawaiian and Other Pacific Islanders (NHOPIs) is extremely limited despite growing concern of SA among these groups. : This study examined predictors of SATC among and within Asian, NHOPI, and White racial groups. : 129,939 cases from the SA and Mental Health Services, Treatment Episode Data Set-Discharges-2016 were used in this study. Logistic regressions were employed to examine the differential impact of race on SATC and to investigate the moderating effect of race on the relationship between socioeconomic factors, type of substance used, and type of treatment setting on SATC. : NHOPIs were less likely to complete SA treatment than Whites. Within-group analysis indicated that NHOPIs who were in outpatient non-intensive treatment were more likely to complete treatment compared to ones in inpatient (more than 30 days), and outpatient intensive settings. In contrast, Asians and Whites in outpatient non-intensive treatment settings were less likely to complete compared to all other types of treatment settings. Older adults for Whites were more likely to complete treatment compared with younger adults. Age was not a significant predictor of SATC for Asians and NHOPIs. Asian and NHOPI methamphetamine users were less likely to complete treatment compared with White users. : Findings highlight the importance of disaggregating Asians and NHOPIs in future SA studies to better understand how specific factors are relevant to each group, and to guide the development of cultural and race-informed treatments for these groups.