Guo HF 1996.

Methods	Generation of allocation sequence: unstated. Blinding: not used. Sample size estimation: no information. Withdrawal/drop‐out: unstated.
Participants	Ethnic: Chinese; 78 patients (M/F 46/32, mean age 55 years (35‐81), mean disease duration 3.9 years (0.1‐37 years). 40 in treatment group and 38 in control group). Setting: outpatients and inpatients. Inclusion criteria: type 2 diabetes mellitus, diagnosed by WHO criteria (WHO 1980). Exclusion criteria: unstated.
Interventions	Experimental intervention: Xingyu Huashi recipe (mixture of 8 herbs) decoction, one dosage/day, divided into two times, orally, for two months; hypoglycaemic drugs: gliclazide plus captopril and alginric sodium diester, gliclazide 80‐240 mg/day, captopril 12.5‐75 mg/day, alginric sodium diester 150‐300 mg/day. Control intervention: gliclazide, 80‐240 mg/day orally, captopril 12.5‐75 mg/day, and alginric sodium diester 150‐300 mg/day orally, for two months.
Outcomes	FBG and PBG. No follow‐up was reported.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear