In addition , a significant reduction in serum LDL-cholesterol ( -@ @ vs +@ @ mmol/l , p = @ ) and total cholesterol : HDL-cholesterol ratio ( -@ @ vs +@ @ , p = @ ) and a significant elevation in HDL-cholesterol levels ( +@ @ vs -@ @ mmol/l , p = @ ) was seen after intervention in the calcium-vitamin D group compared with placebo .