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[An investigation of the relationship among ligation of vas deferens, hypertension and coronary disease].


 This paper is a report of a research study conducted in a factory workers' hospital in Chongqing city, China in 1986 on the prevalence of hypertension and coronary heart disease among the men who had vasectomy for over 15 years. The study involved 2749 men aged over 50 including 634 who had vasectomy for over 15 years and 2115 men who did not have vasectomy. The items of investigation in the study included sex function, blood pressure, blood cholesterol level, EKG scanning, and chest X rays exams. The results showed: (1) There were 280 hypertension patients among the people examined in the survey. No significant difference was found between the vasectomized group and non- vasectomized group in each of the age groups with different time length of vasectomy. (2) 285 people were found to have coronary heart disease. But there was also no statistical difference of its occurrence between the vasectomized and non-vasectomized group of each age group. Therefore, no association was found between the hypertension, coronary heart disease and vasectomy between paired age groups, as well as the time length of vasectomy. The prevalence of hypertension and coronary heart disease in this study was higher than those found in Sichuan Provincial Epidemiological Survey of Hypertension and Coronary Heart Disease conducted in 1981 and 1982. The age range of the respondents in that survey was 30-65 compared with 50-90 of the current study. The higher ages is likely to be the cause of the higher prevalence.
