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Methodology
How Did the Gallup-Sharecare Well-Being Index Work?
Methodology

How Did the Gallup-Sharecare Well-Being Index Work?

What was the Gallup-Sharecare Well-Being Index?

In 2008, Gallup and Sharecare initiated a partnership, which merged decades of clinical research, health leadership and behavioral economics research to track and understand the key factors that drive well-being. The Gallup-Sharecare Well-Being Index provided an in-depth view of Americans' well-being and offered insights into their attitudes and behaviors at the national, state and community levels.

The Well-Being Index measured Americans' perceptions of their lives and their daily experiences through five interrelated elements that make up well-being: purpose, social, financial, community and physical.

How were surveys conducted for the Gallup-Sharecare Well-Being Index?

Beginning in January 2018, Gallup surveyed U.S. adults aged 18 and older living in all 50 states and the District of Columbia using a dual mail and web-based methodology. Gallup sampled individuals using an address-based sampling (ABS) frame, which was a representative list of all U.S. households. In their survey invitation, sample members were provided with a mail survey and a link and a unique access code if they would prefer to complete the survey online. Gallup purchased samples for this study from Survey Sampling International. Gallup chose respondents at random within each household based on which member had the next birthday. Gallup included Spanish-language surveys and related materials for households that had a high likelihood of including a Spanish language speaker, based on U.S. Census records.

Prior to 2018, Gallup used a dual-frame design, which included both landline and cellphone numbers. Gallup sampled landline and cellphone numbers using random-digit-dial methods and conducted interviews in Spanish for respondents who were primarily Spanish-speaking.

How many people were surveyed as part of the Gallup-Sharecare Well-Being Index?

Gallup surveyed approximately 10,000 U.S. adults aged 18 and older each month. More than 2.6 million surveys were conducted after it began in 2008.

How often were Gallup-Sharecare Well-Being Index surveys conducted?

Gallup sent survey invitations once per month, 12 months per year.

Were Gallup-Sharecare Well-Being Index samples weighted?

Yes, Gallup weighted samples to correct for nonresponse. Gallup also weighted its final samples to match the U.S. population according to gender, age, race, Hispanic ethnicity, education, region and population density. Demographic weighting targets for the U.S. and for individual states were based on the most recent Current Population Survey figures for the aged 18 and older U.S. population, while weighting targets for metropolitan areas and congressional districts were based on Nielsen Claritas statistics. Population density targets were based on the most recent U.S. Census. All reported margins of sampling error included computed design effects for weighting.


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