Calcium-vitamin D co-supplementation resulted in reduced serum insulin ( changes from baseline : -14.8 3.9 pmol/l , p = 0.01 ) , HbA1c [ -0.70 0.19 % ( -8.0 0.4 mmol/mol ) , p = 0.02 ] , HOMA-IR ( -0.46 0.20 , p = 0.001 ) , LDL-cholesterol ( -10.36 0.10 mmol/l , p = 0.04 ) and total/HDL-cholesterol levels ( -0.91 0.16 , p = 0.03 ) compared with other groups .