Generally, there were few statistically significant demographic differences among those enrolled in comprehensive insurance, CDHPs, and HDHPs, the survey found. There also were no differences when comparing the three groups by gender, marital status, number of children, or race-ethnicity. However, individuals in CDHPs and HDHPs were more likely to be older than those in comprehensive insurance. In addition, those enrolled in CDHPs were more likely than those in HDHPs to report they are employed and are more likely than those in both comprehensive health plans and HDHPs to report personal earned income of $150,000 or more.

The survey of 1,204 U.S. residents ages 21–64 was conducted Sept. 28 to Oct. 19 through an 18-minute Internet survey. While Internet surveys such as the Consumerism in Health Care Survey are not a representative sample of all adults, studies have demonstrated that such surveys, when carefully designed, obtain results comparable to random-digit-dial telephone surveys. Details about the survey methodology are available in the full study.