as slowhand mentioned above the ratio of good to bad cholesterol are important figures.unfortunately we as people are mostly governed by genitics of our parents etc..
cholesterol is divided into both LDL and HLD- This concernes the density of lipids in our blood stream..this is the good and bad chloesterol.
this will determine what type of statin that someone will take ..
also was you test a fasting one? this can make a difference.
always get your chloesterol checked every 6 months and badger your gp to put you onto the right type of statin -
advice can be found from the british heart foundation if need be