Summary of Included Studies.

NR = Not reported.(a) & (b) refers to two study arms from the same two arm randomised study reporting differing rates for the two main included outcomes.Cut-offs Used.Diabetes.§ = tick test scoring method (more than 1 recognized risk factor for diabetes) and fasting blood glucose ≥5.5 mmol/l or random blood glucose ≥11 mmol/l.¶ = tick test scoring method (more than 1 recognised risk factor for diabetes).** = Fasting blood glucose ≥8 mmol/l,†† = random blood glucose ≥10 mmol/l,‡‡ = random blood glucose or ≥11 mmol/l fasting blood glucose 6 mmol/l.Blood Pressure.* = ≥160/100 mmHg,† = ≥160 mmHg systolic only,‡ = ≥140/100 mmHg.Cholesterol.§§ = total cholesterol ≥200 mg/dl,*** = total cholesterol ≥232 mg/dl.