<I>Water balance in the elderly in summer and winter</I>

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  • OKAYAMA Y
    College of Medical Technology, Kyoto Prefectural University of Medicine

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  • 高齢者における夏期および冬期の水分出納
  • コウレイシャ ニ オケル カキ オヨビ トウキ ノ スイブン スイトウ

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The water balance in daily living in summer and winter was studied in 14 aged females (mean age, 74.4 years) living at home to obtain basic data for evaluation of prevention of dehydration in the elderly. The following results were obtained. 1) The total water intake was 2.81 in summer and 2.21 in winter, and the water intake from drinking water and meals was greater in summer than in winter. 2) Drinking water was taken primarily as Japanese tea in winter and as Japanese tea and barley tea in sum-mer. 3) Although no difference was observed in the urine volume between summer and winter (1.2 1 in winter and 1.51 in summer), the volume of perspiration was greater in summer (1.51) than in win-ter (0.61) . 4) The total water intake showed negative correlation with the age (r=-0.57 in summer, r=-0.61 in winter) but positive correlation with the water intake from meals (r=0.62 in summer, r=0.61 in winter) and water intake from drinking water (r=0.97 in summer, r=0.89 in winter) . The total water intake was found to depend upon the body surface area, the frequency of water intake and age, both in summer (r2=0.86) and winter (r2=0.92) according to the multiple regression analysis. These findings suggest that there is a clear seasonal difference in the water balance of the elderly and that more conscious drinking of water and intake of meals with greater water contents are effective for prevention of dehydration.

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