INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH VOLUME 1, ISSUE 9, OCTOBER 2012 ISSN 2277-8616 92 IJSTR©2012 www.ijstr.org On Regression Analysis of The Relationship Between Age And Blood Cholesterol On Blood Pressure. R. E. Ogunsakin 1 , R. B. Ogunrinde 2 , O. Omotoso 3 , O. B. Adewale 4 Abstract:- This paper investigates the relationship of Age and Blood cholesterol on systolic blood pressure. The data used for this paper were obtained from Ekiti State University Teaching Hospital, Ado Ekiti. People wondered if high blood pressure is a function of age or that the effect of high blood cholesterol is manifested in the high blood pressure. A multiple regression analysis was used for the study. At the end of the analysis, Age and systolic blood pressure were seen to have a significant relationship with each other. Also, blood cholesterol and age were found to have significant relationship with systolic blood pressure. The result shows a degree of relationship between the blood pressure and the blood cholesterol. Increase in blood cholesterol signifies increase in blood pressure of a man which can easily lead to an abnormal blood pressure e.g. high blood pressure. Keywords: Age, systolic, regression, parameters, hypotheses ———————————————————— Introduction Age, blood cholesterol and blood pressure are biological occurrence which are associated to man and other animals. This process is very important as it determines the state of well being and health level of a man. Blood pressure is the measurement of how much force the blood exerts on the wall of blood vessels. There are many events occur within the body as the heart pumps bloods, known as the cardiac cycle, and so pumps blood is measure at different point throughout this cycle. Systolic blood pressure measure the maximum pressure in the arteries during the cardiac cycle, which occurs when the heart contract or beat to pump blood. Blood pressure is affected by medication, cardiovascular or urological disorders, neurological conditions and psychological factors such as stress or anger. Even diet and posture can play a role, because there are so many variables, healthy blood pressure readings can fall anywhere inside a large range. A healthy adult will have systolic blood pressure between 90 and 135 mm Hg. Some of the ways to lower the blood pressure reading is by increasing physical activities, curbing alcohol consumption and increasing food content in the diet. One exceptional method of reducing the blood pressure of man is dependent on some factors that means there are some factors that influence the level of blood pressure reading in the body such factors are Age and blood cholesterol. Blood cholesterol is a fatty substance that occurs naturally in the body and which is necessary for hormone production, cell metabolism and other vital process. Having high cholesterol level in the blood can increase the risk of heart diseases and stroke. Blood cholesterol is also a factor that affects blood pressure. High blood cholesterol does not automatically lead to high blood pressure but many of the activities and the same life habits that may increase blood cholesterol may also cause elevated blood pressure. Example include diet high in saturated fat, lack of physical activities, taking too much of alcohol amongst others. Age is considered medically as one of the major factors that affect the blood pressure of an adult. Age being the number of years of existence from birth to the present time is not determined by any factor, it is a compulsory biological change that cannot be controlled. Age comes along with growth, development and death. The more years you spend as an adult the less active your body system becomes and this is where age is got something to do with blood pressure related to the blood pressure. Age brings about accumulation and depreciation and with this greater risk of medical instability, so age bring about a change in the blood pressure of man as it is shown in this paper. Data And Methodology This research is aimed at finding out whether Age and Blood cholesterol has any effect on the blood pressure. Data for the study were obtained from Ekiti State Teaching Hospital, Ado Ekiti. Regression analysis was used in this study. We analyzed data containing more than two categorical variables by using multiple regression procedure. PASW (18) was used in estimating the parameters of the model. Regression models are used when the behaviour of one variable is ‘explained’ by changes in other variables. A statistical model takes account of the inherent variability of the data: this will arise because of measuring or observational errors or chance circumstances. Multiple Linear Regression This is applicable when we have multivariate data. A multiple linear regression model relates a response variable Y to more than one explanatory variable. The main purpose of the multiple regression analysis is to find which explanatory variables contribute to the variation of the response variable. Model: . ,... 2 , 1 , 2 2 1 1 0 n i x x x y i ki k i i i = + + + + + = ε β β β β  where: k is the number of explanatory variables, . error term random a is model, the of parameters the are , , i k 1 0 ε β β β  Interpretation and Discussion of Results The analysis of the data used for the purpose of this paper is discussed here. Predictive Analytic Software (PASW) was employed for the estimation of parameters and other calculations. The results obtained are shown in tables 1, 2, 3, 4 and 5 respectively. We want to see whether age and blood cholesterol have any relation on blood pressure. In doing this we are going to employ multiple regression analysis to test the