A health plan's investigation of Healthy Days and chronic conditions.

To investigate whether self-reported unhealthy days are related to 6 chronic conditions and other health indicators by using administrative claims.Cross-sectional study using Healthy Days survey data linked to administrative claims.Survey respondents 65 years or older with Medicare Advantage coverage in November or December 2014 and 12 months continuous presurvey enrollment were identified. Mean physically and mentally unhealthy days were...