Wolever 1992.

Methods	Trial Design: RCT Randomisation procedure: not reported, crossover design Allocation concealment: not reported Blinding of outcome assessors: not reported Intention to treat analysis: yes
Participants	Country: Canada Setting: community Number: 6 in crossover study Age: 63 ± 4 years Sex: 3 male, 3 female Inclusion criteria: NIDDM plus obese/overweight Other characteristics: BMI 32.1 ± 2.4kg/m2
Interventions	Trial intervention: low glycaemic index diet GI= 58, comparison intervention: high glycaemic index diet GI=86 Duration of study: 6 weeks. 4 to 6 week washout period in between diets.
Outcomes	Main outcome measures: fructosamine, body weight, lipids
Notes	Source of funding: Canadian Diabetes Association, Bristol Myers Company, NY Drop‐outs: 2 subjects were sampled one week early for the final analysis for both diets.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear

GI = glycaemic index 
 RCT= randomised controlled trial 
 BMI = Body Mass Index 
 NIDDM = non‐insulin dependent diabetes mellitus 
 CHOx = Measured carbohydrate exchange 
 %HbA1c = percentage glycated haemoglobin