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Seasonal mood variation in the elderly: the Leiden 85-plus Study

โœ Scribed by Anton J. M. de Craen; Jacobijn Gussekloo; Roos C. van der Mast; Saskia le Cessie; Johanna W. Lemkes; Rudi G. J. Westendorp

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
82 KB
Volume
20
Category
Article
ISSN
0885-6230

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โœฆ Synopsis

Abstract

Background

The influence of seasonal changes on mood and behaviour is called seasonality. The prevalence of seasonality in elderly subjects is unknown.

Aim

To investigate the seasonality pattern in mood and behaviour at old age.

Methods

All subjects from the Leiden 85โ€plus Study with an MMSE score of 19 or more were assessed for depressive feelings at age 85 and yearly thereafter. The influence of time of the year, duration of sunlight, daylight, and rain on the prevalence of depressive symptoms was assessed using linear mixed models for repeated measurements.

Results

There was no significant seasonal pattern in the data (pโ€‰=โ€‰0.44). Within each of the four years of observation (85, 86, 87 and 88 years) and all years combined, there was also no significant association between the oneโ€month cumulation of duration of sunlight, daylight, or rain and the score on the GDS (all pโ€values >0.05). The results of either the one week or threeโ€month accumulation of sunlight, daylight, or rain were comparable to the oneโ€month results.

Conclusions

Estimates of prevalence of seasonality reported in the literature might be overestimated or a remarkable difference between young and old subjects exists. Copyright ยฉ 2005 John Wiley & Sons, Ltd.

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