| pubmed-article:16808089 | pubmed:abstractText | The National Health and Nutrition Examination Surveys (NHANES) activity of daily living (ADL) instrument is a 16-item questionnaire designed to represent the internal latent construct of activities of daily living. The purpose of the present study was to measure selected psychometric properties (dimensionality, internal consistency and individual item response) of the NHANES ADL instrument on a population of patients who reported frequent severe headaches. | lld:pubmed |
