Logistic regression and epidemiology. I

摘要: The logistic regression is used in epidemiology to study the relationships between a disease two modalities (diseased or free) and risk factors Xi which may be qualitative quantitative variables. According this model, probability of knowing Xi's values written: [formula: see text]. coefficients beta i satisfy equation: ORi = exp(beta i) where odds-ratio linked variable adjusted on other variables model. first part paper indicates way include model with more than modalities, interaction At least, maximum likelihood method estimate parameters presented.