Comparison 4. Metformin versus acarbose.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 All‐cause mortality	1		Risk Ratio (M‐H, Random, 95% CI)	Subtotals only
2 Incidence of type 2 diabetes	3	295	Risk Ratio (M‐H, Random, 95% CI)	1.72 [0.72, 4.14]
3 2‐hr plasma glucose	2	190	Mean Difference (IV, Random, 95% CI)	0.49 [0.09, 0.88]
4 Fasting plasma glucose	2	190	Mean Difference (IV, Random, 95% CI)	0.00 [‐0.35, 0.35]