Quality of Life Research

, Volume 15, Issue 1, pp 179–184 | Cite as

Validation of the Dutch Version of the CDC Core Healthy Days Measures in a Community Sample

Brief communiaction


An important disadvantage of most indicators of health related quality of life used in public health surveillance is their length. In this study the authors investigated the reliability and validity of a short indicator of health related quality of life, the Dutch version of the four item ‘CDC Core Healthy Days Measures’ (CDC HRQOL-4). The reliability was evaluated by calculating Cronbach’s alpha of the CDC HRQOL-4. The concurrent validity was tested by comparing the CDC HRQOL-4 with three other indicators of health related quality of life, the SF-36, the WHOQoL-BREF and the GHQ-12. The construct validity was evaluated by assessing the ability of the CDC HRQOL-4 to discriminate between respondents with and without a (non-mental) chronic condition, depression, a visit to the general practitioner and use of prescription drugs. Randomly sampled respondents from the city of Utrecht were asked to fill in a questionnaire. 659 respondents (response rate 45%) completed the questionnaire. Participants represented the adult, non-institutionalised population of the city of Utrecht, the Netherlands: 58% women; mean age 41 years; 15% of non-Dutch origin. The reliability of the CDC HRQOL-4 was good. Cronbach’s alpha of three of the four CDC HRQOL-4-items was 0.77 which is good for internal consistent scales. The concurrent validity was good. The four items of the CDC HRQOL-4 showed higher correlations with their corresponding domains of the other instrument than the other domains. Comparison of respondents with or without a chronic condition, depression, visit to the GP and use of prescription drugs produced evidence for an excellent construct validity of the CDC HRQOL-4.


Health related quality of life Reliability Validity 


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Copyright information

© Springer 2006

Authors and Affiliations

  1. 1.Department of EpidemiologyMunicipal Health Service UtrechtUtrechtThe Netherlands
  2. 2.Department of Public HealthErasmus MC - University Medical Centre RotterdamRotterdamThe Netherlands

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