The Fresenius Medical Care North America 2015 Health Indicator consisted of an online survey of 288 physicians and a phone survey conducted among 1,000 general population adults.
The online survey of physicians was conducted between September 14 and September 21, 2015, among 288 physicians, distributed among cardiologists (25%) nephrologists (23%), endocrinologists (25%) and hospitalists (26%). Physician respondents were required to have at least one year of experience and work directly with patients.
The general population telephone survey was conducted between September 11 and September 17, 2015 among 1,000 general population adults 18 years of age and older living within the United States. The sample is nationally representative of the U.S. population as it relates to age, gender, region and ethnicity. A dual sampling method of landline and cell phone was used. The total sample has a margin of error of +/- 3.1% at the 95% confidence level.
The surveys were both conducted by FTI Consulting.