Chen JP 1999.

Methods	Country: China Setting: outpatients Aim: to observe the therapeutic effect of Gukang oral liquid on postmenopausal osteoporosis Study design: single‐blind, randomised controlled trial Analysis: T‐test Loss to follow‐up: not reported
Participants	Ethnicity: Chinese 61 postmenopausal osteoporosis patients enrolled: 36 in trial group, 25 in control group Inclusion criteria: diagnostic criteria for osteoporosis based on bone density levels, BMD detected by single photon absorptiometry (SPA) Exclusion criteria: secondary osteoporosis, etc.
Interventions	Experimental: Gukang oral liquid (a basic herbal compound), 10 ml, 3 times a day, for 6 months Control: Tridin, 1 tablet, 3 times a day, for 6 months
Outcomes	BMD
Notes	No funding sources or declarations of interest for the primary researchers reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation	Unclear risk	No information provided
Allocation concealment	Unclear risk	No information provided
Blinding All outcomes	Low risk	Single‐blind but did not describe who was blinded
Incomplete outcome data addressed All outcomes	Low risk	No missing outcome data
Free of selective reporting	Unclear risk	Not all the outcomes that were of interest in this review were reported
Free of other bias	Unclear risk	P value for the baseline comparison not stated