Affordable Care Act Tracking Survey, February–April 2016

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Survey results analyzed in:

Issue Brief: Who Are the Remaining Uninsured and Why Haven’t They Signed Up for Coverage?

Press Release: Latinos and People with Low Incomes Are Most Likely to Be Uninsured, Despite Significant Gains Under the Affordable Care Act

Issue Brief: Americans’ Experiences with ACA Marketplace Coverage: Affordability and Provider Network Satisfaction

Press Release: New ACA Marketplace Findings: Subsidies For Lower-Income Enrollees Make Insurance Premium And Deductible Costs Comparable To Employer Coverage

Issue Brief: Americans’ Experiences with ACA Marketplace and Medicaid Coverage: Access to Care and Satisfaction

Press Release: Most ACA Enrollees Who Have Used Their Plans Are Getting Health Care They Previously Would Have Gone Without; Wait Times for Doctor Appointments Similar to Other Insured Americans


Country: United States

Survey Organization: Social Science Research Solutions

Field Dates: February 2 to April 5, 2016.

Sample: Nationally representative sample of 4,802 adults, ages 19 to 64

Sample Size: Overall, 1,496 interviews were conducted on landline telephones and 3,306 interviews on cell phones.

How This Survey Was Conducted: This survey is the fourth in a series of Commonwealth Fund surveys to track the implementation and impact of the ACA. The first was conducted by SSRS from July 15 to September 8, 2013, by telephone among a random, nationally representative U.S. sample of 6,132 adults ages 19 to 64. The survey had an overall margin of sampling error of +/– 1.8 percentage points at the 95 percent confidence level.

The second survey in the series was conducted by SSRS from April 9 to June 2, 2014, by telephone among a random, nationally representative U.S. sample of 4,425 adults ages 19 to 64. The survey had an overall margin of sampling error of +/– 2.1 percentage points at the 95 percent confidence level. The sample for the April–June 2014 survey was designed to increase the likelihood of surveying respondents who were most likely eligible for new coverage options under the ACA. As such, respondents in the July–September 2013 survey who said they were uninsured or had individual coverage were asked if they could be recontacted for the April–June 2014 survey. SSRS also recontacted households reached through their omnibus survey of adults who were uninsured or had individual coverage prior to the first open enrollment period for 2014 marketplace coverage.

This third survey in the series was conducted by SSRS from March 9 to May 3, 2015, by telephone among a random, nationally representative U.S. sample of 4,881 adults ages 19 to 64. The March–May 2015 sample also was designed to increase the likelihood of surveying respondents who had gained coverage under the ACA. SSRS recontacted households reached through their omnibus survey of adults between November 5, 2014, and February 1, 2015, who were uninsured, had individual coverage, had a marketplace plan, or had public insurance. The survey had an overall margin of sampling error of +/– 2.1 percentage points at the 95 percent confidence level.

The February–April 2016 sample also was designed to increase the likelihood of surveying respondents who had gained coverage under the ACA. Interviews in wave 4 were obtained through two sources: stratified random-digit-dialing sample, using the same methodology as in waves 1, 2 and 3; and households reached through the SSRS omnibus survey, where interviews were previously completed with respondents ages 19 to 64 who were uninsured, had individual coverage, had a marketplace plan, or had public insurance.

As in all waves of the survey, SSRS oversampled adults with incomes under 250 percent of poverty to further increase the likelihood of surveying respondents eligible for the coverage options as well as allow separate analyses of responses of low-income households.

The data are weighted to correct for the stratified sample design, the use of recontacted respondents from the omnibus survey, the overlapping landline and cell phone sample frames, and disproportionate nonresponse that might bias results. The data are weighted to the U.S. 19-to-64 adult population by age, gender, race/ethnicity, education, household size, geographic division, and population density using the U.S. Census Bureau’s 2014 American Community Survey, and weighted by household telephone use using the U.S. Centers for Disease Control and Prevention’s 2014 National Health Interview Survey.

The resulting weighted sample is representative of the approximately 189 million U.S. adults ages 19 to 64. Data for income, and subsequently for federal poverty level, were imputed for cases with missing data, utilizing a standard regression imputation procedure. The survey has an overall margin of sampling error of +/– 2.0 percentage points at the 95 percent confidence level. The landline portion of the main-sample survey achieved a 22.6 percent response rate and the cellular phone main-sample component achieved a 13.9 percent response rate. The overall response rate, including the prescreened sample, was 13.9 percent.

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