Prevalence of Muscle Cramps in Japan - with Special Reference to Aging and Peripheral Circulatory Insufficiency

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  • 日本におけるこむら返りの頻度―とくに加齢と末梢循環障害の関与について―

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<p>One thousand three hundred and fifty four subjects from the general population retuned questionnaires giving details about muscle cramps. The overall prevalence of muscle cramps in the survey population was 59.7%. The prevalence of cramps occurring within 1 year prior to examination was 49.4%. Persons aged 50 or more years showed a significantly higher incidence of muscle cramps than persons aged 30-49 years or persons aged 10-29 years (p<0.001). Furthermore, the incidence of muscle cramps in persons aged 10-29 years was significantly higher than that in persons aged 30-49 years (p<0.05). Persons aged 10-29 years old showed a significantly higher incidence of muscle cramps during the day (p<0.05), and their muscle cramps were more often induced by daytime exercise than that in other age groups. Persons with leg varicose veins showed a significantly higher incidence of muscle cramps than those without varicose veins (p<0.001). However, there was no significant difference in the incidence of muscle cramps between persons with and without risk factors for arteriosclerosis. From these results it might be concluded that one reason muscle cramps were quite common in older people was the increased incidence of leg varicose veins. However, risk factors for arteriosclerosis were not a cause of developing muscle cramps.</p>

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