Fasting blood-glucose 2 hour postprandial blood glucose and glycosylated hemoglobin were all lower in intervention group ( ( 7.29 1.81 ) mmol/L , ( 8.21 2.37 ) mmol/L , ( 6.59 0.92 ) % ) than in the control group ( ( 8.53 1.66 ) mmol/L , ( 9.41 3.30 ) mmol/L , ( 7.66 1.50 ) % ) , there were significant differences in two groups ( t values were 5.33 , 4.67 , 5.49 , all P values < 0.05 ) .