Proportion of Australians aged 25 years and over with high blood pressure, by age group, 1999-2000. Note: High blood pressure is defined as systolic blood pressure of 140 mmHg or more; or diastolic blood pressure of 90 mmHg or more; or receiving medication for high blood pressure. Source: AIHW analysis of the 1999-2000 AusDiab. Image obtained from Australian Institute of Health and Welfare, Prevalence of Rick factors for Chronic Disease, 2012, obtained 1-15-2013 from: What age group had the highest proportion of individuals with high blood pressure? What is the difference between the proportion men and women with high blood pressure in the 45-54 year age group? Does the proportional difference between men and women increase, decrease or remain the same as age increases? What are the variables? What unit of measure is used for each? Is there a dependent and independent variable? If so, which variable is dependent and which is independent?