Do depressive symptoms cause intellectual decline among elderly?

Nishita Yukiko, Tange Chikako, Tomida Makiko, Ando Fujiko, Shimokata Hiroshi

doi:10.34393/rousha.34.3_370

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Other Title

高齢者の抑うつはその後の知能低下を引き起こすか
高齢者の抑うつはその後の知能低下を引き起こすか : 8年間の縦断的検討
コウレイシャノヨクウツワソノゴノチノウテイカオヒキオコスカ : 8ネンカンノジュウダンテキケントウ
An 8-year longitudinal study
―― 8年間の縦断的検討 ――

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Abstract

<p> This study examined the relationship between depressive symptoms and subsequent intellectual decline in Japanese elderly. Subjects (age=65-79 : n=805) comprised the first wave participants of the National Institute for Longevity Sciences-Longitudinal Study of Aging (NILS-LSA), and were tested 5 times and followed for about 8 years. Depressive symptoms at baseline were assessed using the Center for Epidemiologic Studies Depression scale (CES-D), and intellectual changes for 8 years were assessed with the Wechsler Adult Intelligence Scale-Revised Short Forms (WAIS-R-SF), including its Information test, Similarities test, Picture Completion test and Digit Symbol test. General linear mixed model analyses revealed that depressive symptoms at the time of the baseline measurement had affected 8 year changes of ‘Information’, ‘Similarities’ and ‘Digit Symbol’ test scores. In contrast, depressive symptoms were not associated with subsequent decline in ‘Picture Completion’ test scores. These results suggest that depressive symptoms among elderly may cause decline in levels of general factual knowledge, logical abstract thinking and speed of information processing.</p>

Journal

Japanese Journal of Gerontology

Japanese Journal of Gerontology 34 (3), 370-381, 2012-10-20

Japan Socio-Gerontological Society

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