Moench 2021.

Study characteristics
Methods	Study design: randomised controlled trial Study grouping: parallel group
Participants	Baseline characteristics Self‐Care Traumatic Episode Protocol Age in years (mean ± SD): NR Sex (N (% female)): NR Sample size: 16 Years of experience (mean ± SD): NR Control (wait list) Age in years (mean ± SD): NR Sex (N (% female)): NR Sample size: 17 Years of experience (mean ± SD): NR Overall Age in years (mean ± SD): NR Sex (N (% female)): NR Sample size: 33 Years of experience (mean ± SD): NR Included criteria: participants were considered suitable for study inclusion if they met the following criteria: they were willing to participate voluntarily in treatment; they provided written consent; and were licenced mental health clinicians who had taken basic EMDR training. Excluded criteria: participants were excluded if they disclosed severe levels of clinical distress, if they were concurrently receiving psychological treatment during the study period, or if they endorsed suicidal intent. Pretreatment: NR Compliance rate: 94% Response rate: NR Type of healthcare worker: 34 participants included master’s level clinical social workers (n = 8), Canadian Certified Counsellors (n = 4), master’s or PhD‐level registered psychologists (n = 21), and psychiatrists (n = 1).
Interventions	Intervention characteristics Self‐Care Traumatic Episode Protocol Type of the intervention: Intervention type 4 ‐ Combination of two or more of the above Description of the intervention: The intervention required participating in a video‐ and worksheet‐guided STEP intervention protocol. Within the intervention, participants watched a series of videos (e.g. on self‐care, relaxation), using the protocol to assist in processing any points of disturbance that would come up in relation to the current situation that they have found distressing or what may happen in the future in relation to the COVID‐19 pandemic. Participants were asked to target the COVID‐19 episode from the onset of COVID‐19 until now or even into the future. The number of sessions: 1 Duration of each session on average: 1.5 hours Duration of the entire intervention: 0 weeks Duration of the entire intervention short vs long: short Intervention deliverer: Therapists were the first author and a Master of Counselling graduate student in her last year of the program. Intervention form: individual, distance Control (wait list) Type of the intervention: NA Description of the intervention: NA The number of sessions: NA Duration of each session on average: NA Duration of the entire intervention: NA Duration of the entire intervention short vs long: NA Intervention deliverer: NA Intervention form: NA
Outcomes	Depression Anxiety Stress Scale (DASS‐21) Outcome type: ContinuousOutcome Scale: Lovibond & Lovibond, 1995
Identification	Sponsorship source: the authors received no specific grant or financial support for the research, authorship, and/or publication of this article. Country: Canada Setting: NR Comments: NR Authors name: Judy Moench Institution: Judy Moench Psychological Services Ltd. Email: jmoench@telusplanet.net Address: #260, 10230 142 Street, NW Edmonton, AB, T5N 3Y6, Canada. Time period: June 2020
Notes	Included in analysis 4.1
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Using a randomisation sequence based on a random number table.
Allocation concealment (selection bias)	Unclear risk	Participants were randomized by a research assistant. Insufficient information to understand whether intervention allocations could have been foreseen by participants in advance of, during, enrolment.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Participants were not blinded.
Blinding of outcome assessment (detection bias) All outcomes	High risk	Participants were not blinded whereas outcomes are self‐reported.
Incomplete outcome data (attrition bias) All outcomes	Low risk	5% lost to follow‐up.
Selective reporting (reporting bias)	Unclear risk	No trial registration, nor did we find one online.
Other bias	Unclear risk	Response rate was not reported.