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Methodology: 2011 U.S. and Global Survey of Health Care Consumers

2011 U.S. Survey of Health Care Consumers

A nationally representative sample of 4,000 U.S. adults, aged 18 and older, was surveyed in April 2011 using a web-based questionnaire. The results were weighted to ensure proportional representation to the nation's population with respect to age, gender, income, race/ethnicity, and geography. The margin of error is +/- 1.6 percent at a .95 confidence level.

The survey consisted of 84 questions, with 33 potential follow-up questions. English and Spanish versions were available. Participants were asked about behaviors before attitudes within each topic area to reduce response bias.

In this report, comparisons are made to results from Deloitte's previous health care consumer surveys (2008, 2009, and 2010); however, differences in question wording and response scales arising from efforts to improve and develop the survey instrument may preclude direct comparison in some cases. Questions will be repeated periodically in the survey series and new questions will continue to be introduced to keep pace with consumerism in health care as it evolves.

2011 Global Survey of Health Care Consumers

Deloitte surveyed health care consumers in Belgium, Brazil, Canada, China, France, Germany, Luxembourg, Mexico, Portugal, Switzerland, the United Kingdom, and the United States in April and May 2011. The sample was nationally representative of each country with respect to age and gender. The sample in the United States and Canadian surveys was further adjusted for income and geography.

A core set of common questions were asked in each country, supplemented by questions unique to each country's health care system and consumer experience. Participants were asked about behaviors before attitudes within each topic area to reduce response bias.

Across all European and South American countries, the response margin of error was +/- 3.0 percent at a .95 confidence level. In Canada the response margin of error is +/- 2.0 percent at a .95 confidence level and in the United States it was +/- 1.6 percent at a .95 confidence level. A smaller cohort was surveyed in Luxembourg with a margin of error of +/- 4.1 percent at a .90 confidence level. A convenience sampling approach was adopted in China which reflects the nation's on-line population, taking into account age and gender.

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