Dr. Urma Zoolander, an environmental health scientist, is interested in the role of air quality as a
Question:
Dr. Urma Zoolander, an environmental health scientist, is interested in the role of air quality as a risk factor for childhood asthma. She has participated in a study that followed 1000 children from birth to age 10, recording whether or not they developed asthma during that period (Y = 1 for yes and Y = 0 for no). The study also collected information on potential risk factors and protective effects from the child's first year of life including X1, an indicator for whether the child's family lived in an urban setting (Yes = 1, No = 0), X2, the average annual pollution level in thousands of particles per cm3 for the county in which the child lived, X3, an index of socio-economic status for the child's family (higher is better),X4, the number of months for which the child was breast-fed, X5, an indicator for whether there was a family history of asthma (1 = Yes, 0 = No), and X6, gender (1 = Female, 0 = Male). The data are given in the accompanying file
Give a brief interpretation of the odds ratio estimate for the family history variable and the corresponding confidence interval. Show how you would compute the odds ratio and its CI from the table of estimated regression coefficients and vice versa.
Probability and Statistics for Engineers and Scientists
ISBN: 978-0495107576
3rd edition
Authors: Anthony Hayter