My understanding is that age is a factor when assigning a score. The amount of calcium deposits is being compared with others of your age or age group. So, yes, if you can reduce the rate of calcium deposit below the average rate for your group, you can lower your score (without reducing amount of current calcium deposits).

It's too bad you can't know how much calcium was laid down before LC and since. Bottom line: chances are you are doing exactly what you should be doing to keep from growing your risk.