Heart Attack (IMAGE) Sax Institute Caption People who leave school without a school certificate are more than twice as likely to have a heart attack as those with a university degree, according to groundbreaking new Australian research from the largest ongoing study of healthy ageing in the Southern Hemisphere, the Sax Institute's 45 and Up Study. Credit CC0 License Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.