Studies on Cardiovascular Disease Control in Dokkyo High Schools

Report 1. A cross-sectional study on the multiphasic health screening of junior and senior high school boys

Abstract

Health surveys were made on the bights, weights, blood pressure, electrocardiogram, chest X-ray etc. of about 1400 junior and senior high school boys, 12-17 aged, in Tokyo city, in April 1976. The results were as follows : 1. The frequency distribution of arterial blood pressure showed standard normal distribution curves. 2. The Means and Standard Deviations of systolic blood pressure were 116.41 ±11.20 in junior high school boys, and 128.33±12.48 in senior high school boys. The Means and Standard Deviations of diastolic blood pressure were 67.17±9.77and 72.72±11.03 respectively, and the blood pressure gradually increased with age. 3. According to the modified Minnesota code critetia major electrocardiographic findings were 8.4% right axis deviation, 3.3% PQ prolongation, 2.21 complete or incomplete right bundle bolck, and 1.4% sinus bradycardia. 4. According to the modified classification of essential hypertention of the I WHO Expert Committee, the population were divided into three groups with respect to the Means and Standard Deviations of the respective school age.The normotensive group (under Mean) was 72.1%, boderline hypertensive group (within+1 S. D.) 23.2%, and hypertensive group (above+ 1 S. D.) 4.7% 5. It was shown that the blood pressure correldted with the Rhorer's Index, when overweights were defined above Rhorer's Index 136 (junior hgih school boys), and 146 (senior high school boys), overweights were found more frequently in the hypertensive than in the normotensive groups (p<0.01) .