Skip to main content


Table 1 Risk factor definitions

From: Proportion of dementia in Australia explained by common modifiable risk factors

Risk factor Definition
Mid-life obesity The proportion of adults (45–54 years) with BMI ≥ 30 (based on measured height and weight)
Physical inactivity The proportion of adults not meeting physical activity guidelines based on self-reported physical activity engagement in the past 7 days and pedometer data (150–300 minutes of moderate intensity physical activity or 75–150 minutes of vigorous intensity physical activity, or an equivalent combination of both moderate and vigorous activities, each week)
Smoking The proportion of adult smokers (based on self-report data)
Low educational attainment The proportion of adults who have a primary and/or secondary school education (based on self-report data)
Diabetes mellitus The prevalence of diagnosed diabetes mellitus among adults (based on self-report and biomedical data)
Midlife hypertension The prevalence of hypertension in adults (aged 45–54 years) (based on self-report data)
Depression Lifetime prevalence estimates of major depression using Diagnostic and Statistical Manual of Mental Disorders or International Classification of Diseases criteria (based on questionnaire data including diagnostic interviews and psychological distress scales)