Fatigue assessment questionnaire: standardization of a cancer-specific instrument based on the general population.

<i>Objectives:</i> Fatigue has become a major issue of concern in the care of cancer patients, as it has been shown to compromise their quality of life in a significant and lasting way. However, there is a lack of economic and specific measures. The Fatigue Assessment Questionnaire (FAQ) has been developed based on thorough interviews and tested on a large mixed sample of cancer patients. The purposes of this paper are to test the psychometric properties of the FAQ and to provide norms for the German population. <i>Methods:</i> The FAQ was administered to a representative sample of the German population (1,340 female and 1,101 male participants) along with standardiz…