
Online personal health record services could be considered to be in this category. Since the data is personal, people are cautious about the privacy and security of these systems. A 2008 study by the Markle Foundation* found that only 2.7% of adults are using electronic personal health records, though 79% see benefits of doing so; and over half of those who say that they are not interested in doing so cite worries about privacy and confidentiality.
* http://www.connectingforhealth.org/resources/ResearchBrief-200806.pdf
