Fatigue as related to anxiety and depression in a community-based sample of twins aged over 50

  • Kirk K
  • Hickie I
  • Martin N
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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.

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  • K. M. Kirk

  • I. B. Hickie

  • N. G. Martin

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