You did a great job of pulling specific statistics and pieces of evidence from the article as well as including dependable sources such as CNN and DailyMail.com. However, there are other numerous high quality sources that provide information in this article relating to the correlation of heart disease and dementia. The author of this article is Emily Joshu who is a health and wellness reporter at DailyMail.com. She has also worked as an editor for brands including Health Magazine, LIFE and Shape Magazine. Dr. Testai is neurologist and Stroke Specialist at the University of Illinois at Chicago and an internal medicine doctor at Rochester Medical Group in Michigan. He spoke with CNN and gave them a basis of information about heart disease prevention and the importance of heart health and wellness. Another reliable source who spoke with CNN on this topic was Dr. Andrew Freeman who is a board-certified cardiologist and director of cardiovascular prevention and wellness at National Jewish Health in Denver. You did a great job of analyzing two articles whom share the same claim and comparing and contrasting them. I think including these valid and reliable sources as well as when the article was published and so forth will help expand on your findings!