Kuang 1987.

Methods	RCT
Participants	Hypertensive patients were recruited, and 204 participants were randomly assigned to 1 of 2 arms ‐ qigong with antihypertensive drugs or antihypertensive drugs alone. 104 participants were randomly assigned to qigong, and 100 participants to control The country of publication was China
Interventions	Qigong group: practised qigong and received antihypertensive medication Control group: received antihypertensive medication only Follow‐up originally at one year but occurred again at 20 years
Outcomes	Blood pressure
Notes	Article was translated by MSL and was checked by JSWK In the intervention group, 17% of participants were lost to follow‐up at 20 years; in the control group, 32% of participants were lost to follow‐up at 20 years
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not stated
Allocation concealment (selection bias)	Unclear risk	Not stated
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Not stated
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not stated
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Information was insufficient for judgement
Selective reporting (reporting bias)	Unclear risk	Information was insufficient for judgement
Other bias	Unclear risk	Information was insufficient for judgement