Measures of fatigue, anxiety and depression were administered in self-report questionnaire format to a community-based sample of 2703 Australian twins aged over 50. Factor analysis indicated that a two-factor solution was appropriate and demonstrated a clear separation between fatigue-related items and questionnaire items relating to anxiety and depression. Highly congruent factor structures were derived for male and female subjects.
CITATION STYLE
Kirk, K. M., Hickie, I. B., & Martin, N. G. (1999). Fatigue as related to anxiety and depression in a community-based sample of twins aged over 50. Social Psychiatry and Psychiatric Epidemiology, 34(2), 85–90. https://doi.org/10.1007/s001270050116
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