Coronary heart disease risk factors in secondary school aged children
Cardiff Metropolitan University
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The purpose of the study was to identiff risk factors of coronary heart disease (CHD) in secondary schools pupils aged 14-17 years old. Sixty pupils from Gwyr Secondary School participated in the study, thirty pupils were at key stage four (fifteen male, fifteen female), aged I4.7 * 0.4 years, and thirty were post 16 age group (hfteen male, fifteen female), aged 16.8 * 0.6 years. Blood pressure readings were measured with an Omron m4 automatic blood pressure monitor. Skinfold measurements for four separate sites, biceps, triceps, subscapular, suprailliac were obtained utilising a Harpenden caliper. The 2O-metre shuttle run test was used to measure aerobic f,rtness. To establish reliability a Bland and Altman (1986) 95% limits of agreement was performed. An Anderson Darling normality test was conducted to determine whether the data was normally distributed (P > 0.05). To assess differences between the four groups twotailed independent t-tests for all variables were undertaken. The relationship between variables was assessed by a correlation coefficient of the sixty subjects. Corelation coefficient was also obtained for the four separate groups. The pilot study indicated that the test, re-test for the 20 MST, blood pressure measurlnents and skinfold measurements were reliable. The results obtained from the study illustrate a negative correlation between 20 MST and the sum of four skinfolds (r: -0.647). No significant correlation was obtained for the full cohort of sixty subjects 20 MST and blood pressure, however a negative correlation was obtained for both males and females systolic and diastolic values at the post 16 when this age group was considered independently. Correlation coefficient ranged from (r : -0.38 - r : -0.46). No correlation was obtained between subscapular skinfold and systolic or diastolic blood pressure. A signif,rcant difference between males key stage four and males post 16 age group was obtained for systolic blood pressure. Significant difference was also obtained for males and females post 16 systolic blood pressure. Over 50% of pupils had one or more risk factors for CHD. Older pupils indicated a greater presence of CHD risk factors.
BSc (Hons) Sport, PE and Recreation
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