ORIGINAL PAPER

Social Psychiatry and Psychiatric Epidemiology

, Volume 34, Issue 2, pp 85-90

First online:

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

  • K. M. KirkAffiliated withEpidemiology Unit, Queensland Institute of Medical Research, Post Office, Royal Brisbane Hospital, Brisbane QLD 4029, Australia E-mail: kathe@qimr.edu.au, Tel. +61-7-3362 0272, Fax: +61-7-3362 0101
  • , I. B. HickieAffiliated withSchool of Psychiatry, University of New South Wales, and Academic Department of Psychiatry, St. George Hospital and Community Health Service, Sydney, New South Wales, Australia
  • , N. G. MartinAffiliated withEpidemiology Unit, Queensland Institute of Medical Research, Post Office, Royal Brisbane Hospital, Brisbane QLD 4029, Australia E-mail: kathe@qimr.edu.au, Tel. +61-7-3362 0272, Fax: +61-7-3362 0101

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Abstract

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.