In overweight group , fasting blood glucose ( FBG ) after metformin treatment showed greater decline compared to acarbose group at @ weeks -LSB- -@ ( -@ to -@ ) vs. -@ ( -@ to -@ ) , P < @ ) , however the decrease of @ h post-challenge blood glucose ( PBG ) after acarbose treatment at @ weeks was bigger compared to metformin group -LSB- -@ ( -@ to-@ @ ) vs. -@ ( -@ to -@ ) , P < @ -RSB- .