High cholesterol (hypercholesterolemia) can be inherited, but it's often the result of unhealthy lifestyle choices, and thus preventable and treatable. A healthy diet, regular exercise and sometimes medication can go a long way toward reducing high cholesterol.
High cholesterol typically doesn't cause any symptoms. In the vast majority of cases, the only true symptoms it may cause are emergency events. For instance, a heart attack or stroke can result from the damage caused by high cholesterol over time. These events typically don’t occur until high cholesterol leads to the formation of plaque in your arteries.
The 1999-2000 Australian Diabetes, Obesity and Lifestyle Study (which took blood pressure measurements) indicates that around 3.7 million Australians over the age of 25 had high blood pressure or were on medication for that condition.This equates to 32% of men and 27% of women.Based on self-reports from the Australian Bureau of Statistics' National Health Survey 2004-05, it is estimated that about 2.1 million Australians have high blood pressure. This corresponds to 10% of the population. However, self-reported data are not as reliable as measured data.There has been a decline in the proportion of people with high blood pressure and/or receiving treatment since the 1980s.