Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.
From the 2012 National Quality Health Website Survey:
Health-related Web sites that met 3 or more of the following evaluation criteria:
The National Quality Health Website Survey evaluates a sample of health web sites, representative of most- and least- visited websites (list of eligible "Health and Medical" -related web sites generated by the Internet traffic monitoring service Alexa).
Any change to the objective text, baseline, target, target-setting method or data source since the Healthy People 2020 launch.
The original baseline was revised in 2013 from 51.9 to 47.9 percent of health-related websites that meet three or more evaluation criteria for disclosing information that can be used to assess information reliability due to a change in the data collection methodology. The Internet traffic monitoring service Hitwise was used to draw the original 2009 sample of websites. The revised sample was drawn using the Internet traffic monitoring service Alexa. (While Alexa is similar to Hitwise there are minor differences in sample size and websites sampled.) The target was adjusted from 57.1 to 62.2 percent to reflect the revised baseline using the new target setting method of minimal statistical significance.
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