Rising Health Costs Force Even Insured Americans to Skip Preventive Care - Methodology

The research was conducted online in the United States by The Harris Poll on behalf of Nationwide among 1603 US adults aged 18+, including 400 Gen Z (18-28), 400 Millennials (29-44), 403 Gen X (45-60), and 400 Boomers+ (61+). The survey was conducted 9/17/2025-10/21/2025.

For those age 29+ data are weighted where necessary by education, age by gender, race/ethnicity, region, household income, household size, marital status, and political affiliation to bring them in line with the actual proportions of the population. Gen Z (18-28) data are weighted by education, age by gender, race/ethnicity, region, household size, and political affiliation.

Respondents for this survey were selected from among those who have agreed to participate in our surveys.  The sampling precision of Harris online polls is measured by using a Bayesian credible interval. For this study, the sample data is accurate to within ± 3.0 percentage points using a 95% confidence level. This credible interval will be wider among subsets of the surveyed population of interest.

All sample surveys and polls, whether or not they use probability sampling, are subject to other multiple sources of error which are most often not possible to quantify or estimate, including, but not limited to coverage error, error associated with nonresponse, error associated with question wording and response options, and post-survey weighting and adjustments.