Multivariable analysis is a statistical tool for determining the unique contributions of various factors to a single
event or outcome. For example, numerous factors are associated with the development of coronary heart disease,
including smoking, obesity, sedentary lifestyle, diabetes, elevated cholesterol level, and hypertension. These factors
are called risk factors, independent variables, or explanatory variables. Multivariable analysis allows us to determine the
independent contribution of each of these risk factors to the development of coronary heart disease (called the outcome,
the dependent variable, or the response variable).