Characteristics of the Included Studies.

AE: Adverse event, TAG: True acupressure group, SAG: Sham acupressure group, VAS: Visual Analogue Scale, NA: Not applicable, CG: Control group, SGRQ: The Saint George Respiratory Questionnaire, NRS: Numerical Rating Scale
1: For true acupressure group 1 and sham acupressure group
2: The study did not assess acupressure-related adverse events
3: Statistical analysis was not conducted for vomiting
4: For true acupressure group and sham acupressure group 1
5: Incidence of postoperative adverse events, not sure whether these events were associated with acupressure
6: For true acupressure group 1 and sham acupressure group 1
7: For true acupressure group 1 and sham acupressure group.
*Vote counts of results of therapeutic effects: “++”: True acupressure group is significantly better than sham acupressure group for the main outcome; “+”: Trend of the main outcome in favor of true acupressure group but without statistical significance; “0”: No difference was found between true and sham acupressure groups; “−”:Trend of the main outcome in favor of sham acupressure group but without statistical significance; “− −”: sham acupressure group is significantly better than true acupressure group for the main outcome.
Characteristics of the Included Studies.