Cho 2021.

Study characteristics
Methods	Study design: randomised controlled trial Study grouping: parallel group
Participants	Baseline characteristics Meridian acupressure Age (mean ± SD): 26.2 ± 2.4 Sex (N (% female)): 26 (90%) Sample size: 29 Years of experience (< 1, 1 – < 3, 3– < 5, ≥ 5): 9 (31%), 5 (17%), 7 (24%), 8 (28%) Control (wait list) Age (mean ± SD): 26.8 ± 2.7 Sex (N (% female)): 29 (97%) Sample size: 30 Years of experience (< 1, 1 – < 3, 3 – < 5, ≥ 5): 3 (10%), 5 (17%), 11 (37%), 11 (37%) Overall Age (mean ± SD): 26.5 ± 2.5 Sex (N (% female)): 55 (93%) Sample size : 59 Years of experience (< 1, 1 – < 3, 3 – < 5, ≥ 5): NR Included criteria: the inclusion criteria for participants were daytime shift work nurses who voluntarily agreed to participate, without cognitive disorder, with clear consciousness, ability to communicate in verbal and non‐verbal language, and ability to understand the objectives of the study. Three participants who reported a poor state of health state without a doctor’s diagnosis and prescription were included. Excluded criteria: the exclusion criteria were persons diagnosed with acute or chronic illness by a doctor, those who have taken a prescription with skin lesions at the intervention site, and pregnant and lactating women. Pretreatment: the analysis of the homogeneity between the intervention and control groups showed that they were homogeneous, with a significance level of P < 0.05 Compliance rate: NR Response rate: NR convenience sample Type of healthcare worker: exclusively nurses
Interventions	Intervention characteristics Meridian acupressure Type of the intervention: Intervention type 2 ‐ to focus one’s attention away from the experience of stress Description of the intervention: Firstly, the researcher trimmed the nails and washed the hands immediately before the intervention in order to prevent skin irritation. The intervention was performed at the nurse station in order to maintain the privacy of the participants. A smartphone with a stopwatch function was prepared for 10‐s finger‐pressure per Meridian acupressure point and 5‐s pause. The participants were instructed to sit comfortably on a stationary chair and were informed in advance that acupressure was to be applied on 6 Meridian points for approximately 15 min. The researcher delivering the intervention had completed a special training course as an acupressure therapist in an acupressure research institute in SouthKorea. This researcher has been educating and serving the community for many years. The participants were encouraged to express any discomfort during the Meridian acupressure at any time, and relaxation of mind and body was induced. The participants were allowed to have a rest for 15 min while relaxing comfortably after the intervention. The number of sessions: 3 Duration of each session on average: 15 min Duration of the entire intervention: 3 days Duration of the entire intervention short vs long: Short Intervention deliverer: Trained researcher Intervention form: Individual, face‐to‐face 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	The stress scale ‐ psychological stress Outcome type: ContinuousOutcome The stress scale ‐ physical stress Outcome type: ContinuousOutcome The State Anxiety Inventory (SAI) Outcome type: ContinuousOutcome The stress scale ‐ total Outcome type: ContinuousOutcome
Identification	Sponsorship source: The author(s) received no financial support for the research, authorship, and/or publication of this article Country: Korea Setting: Hospital Comments: NR Authors name: Youngmi Cho Institution: Department of Nursing, Sun Moon University Email: choyoung23@yahoo.com Address: Chungcheongnam‐do, Asan‐si 31460 Korea Time period: 2018
Notes	The stress scale included in analysis 2.1 STAI included in analysis 2.3
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Quote: "The participants were recruited through convenience sampling. During the coin toss, heads meant the subject became a participant in the intervention group in this study."
Allocation concealment (selection bias)	Unclear risk	Quote: "The participants were recruited through convenience sampling. During the coin toss, heads meant the subject became a participant in the intervention group in this study. " Insufficient information to understand whether intervention allocations could have been foreseen 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	No loss to follow‐up
Selective reporting (reporting bias)	Unclear risk	No trial registration or no study protocol reported, nor did we find one.
Other bias	Unclear risk	Compliance and response rate not recorded.