Table 1

Trial descriptions

Study site	Trial	Intervention	Setting	Inclusion criteria	Exclusion criteria	Preregistration trial	Trial dates*
Netherlands	Pilot	PM+	Community	STRENGTHS criteria†	STRENGTHS criteria‡	NTR: NL6665	April 2018–March 2019
	RCT	PM+	Community	STRENGTHS criteria†	STRENGTHS criteria‡; Current receipt of specialised psychological treatment	NTR: NL7552	February 2019–ongoing
Switzerland	Pilot	PM+	Community	STRENGTHS criteria^†	STRENGTHS criteria‡; Being under guardianship; Inability to follow study procedures	ClinicalTrials.gov: NCT03830008	December 2018–March 2020
	RCT	PM+	Community	STRENGTHS criteria† + Arabic-speaking refugees 18+yrs	STRENGTHS criteria‡; Being under guardianship; Inability to follow study procedures	ClinicalTrials.gov: NCT04574466	February 2020–ongoing
Turkey	Pilot	gPM+	Community	STRENGTHS criteria†	STRENGTHS criteria‡	ClinicalTrials.gov: NCT03567083	September 2018–January 2019
	RCT	gPM+	Community	STRENGTHS criteria†	STRENGTHS criteria‡	ClinicalTrials.gov: NCT03960892	August 2019–November 2021
Jordan	Pilot	gPM+	Refugee camp	STRENGTHS criteria† + Having a child or dependent aged 10–16 years	STRENGTHS criteria‡	ANZCTR: ACTRN12619000168156	January–April 2019
	RCT	gPM+	Refugee camp	STRENGTHS criteria† + Having a child or dependent aged 10–16 years	STRENGTHS criteria‡	ANZCTR: ACTRN12619001386123	August 2019–July 2020
Germany	Pilot	SbS	Digital	STRENGTHS criteria†	Signs of imminent suicide risk	DRKS: DRKS00017838	December 2019–October 2020
	RCT	SbS	Digital	STRENGTHS criteria†	Signs of imminent suicide risk	DRKS: DRKS00022143	August 2020–ongoing
Sweden	RCT	SbS	Digital	STRENGTHS criteria†	Signs of imminent suicide risk	DRKS: DRKS00022144	August 2020–ongoing
Egypt	RCT	SbS	Digital	STRENGTHS criteria†	Signs of imminent suicide risk	DRKS: DRKS00023505	March 2021–ongoing

*Recruitment to follow-up.
†STRENGTHS inclusion criteria = Arabic-speaking Syrian refugees 18+years + K10>15 + WHODAS 2.0>16.
‡STRENGTHS exclusion criteria = Signs of imminent suicide risk, acute medical conditions, expressed acute needs or protection risks, and/or Indications of severe mental disorders.
ANZCTR, Australian New Zealand Clinical Trials Registry; gPM+, group PM+; K10, Kessler Psychological Distress Scale; NTR, Netherlands Trial Register; pilot, pilot RCT; PM+, Problem Management Plus; RCT, fully-powered RCT; SbS, step-by-step; STRENGTHS, Syrian REfuGees MeNTal HealTH Care Systems; WHODAS 2.0, WHO Disability Assessment Schedule 2.0.