The CDC HRQOL-14 consists of three measures: the standard 4-item CDC HRQOL-4 developed in the early 1990s, and two other modules that have been available since 1995: the standard Activity Limitation module and the Healthy Days Symptoms module.
Centers for Disease Control and Prevention
Moriarty DG, Zack MM, Kobau R. The Centers for Disease Control and Prevention's Healthy Days Measures--Population tracking of perceived physical and mental health over time. Health and Quality of Life Outcomes, 2003, 1:37 (Full Text Article)
Centers for Disease Control and Prevention. Measuring Healthy Days: Population Assessment of Health-Related Quality of Life. Atlanta, Georgia: November, 2000 (Online 40-page Technical Report)
Hennessy CH, Moriarty DG, Zack MM, Scherr PA, Brackbill R. Measuring health-related quality of life for public health surveillance. Public Health Rep. 1994 Sep-Oct;109(5):665-72 (Full Text Article)