Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	“Randomization was computer generated”
Allocation concealment (selection bias)	Low risk	“REsearch staff and participants were blinded to assignment until completion of baseline assessment”
Blinding of participants and personnel (performance bias)	High risk	Blinding of participants and personnel was not possible due to the nature of the intervention and study design.
Blinding of outcome assessment (detection bias)	High risk	“Research staff members completing study assessments were not blinded to study condition after baseline, which may have affected data collection”.
Incomplete outcome data (attrition bias)	Low risk	No evidence of incomplete outcome data was detected.
Selective reporting (reporting bias)	Low risk	No evidence of reporting outcome selectively was detected.
Other bias	High risk	“Neither specific housing placements available to participants nor SUD treatment received were controlled within or across conditions and likely changed during the course of the study, which may have affected outcomes”.