After @ months of D supply , there was a significant intergroup difference in the change in HbA ( c ) levels ( relative change -LSB- mean standard deviation -RSB- +@ % @ % in the D group vs +@ % @ % the in placebo group , p = @ ) as HOMA-IR decreased by @ % @ % in the D group and increased by @ % @ % in the placebo group ( intergroup difference , p = @ ) .