For questions 54-60, refer to the following study and the accompanying SAS output: Consider the follow-up study data from the Evans County (Georgia) Heart Disease Study described by Cassels (1971). The data pertain to a cohort of 609 healthy white males between the ages of 40 and 76 who were residents of Evans County in 1960. The cohort was followed for 7 years, after which new cases of coronary heart disease (CHD) were identified. The level of circulating catecholamine (CAT) is the exposure variable of interest (defined as 1 = high and 0 = normal). The purpose of the study was to assess the putative association between CAT (as measured in 1960) and the subsequent 7-year incidence of CHD controlling for other potential confounders. The data are summarized below: High Low CAT CAT CHD 27 44 71 No CHD 95 443 538 122 487 609 All other variables of interest for this example include: AGE: age (in years); CHL: cholesterol level (mg/dl); SMK: smoking status (1 = ever smoked or 0 = never smoked); ECG: electrocardiogram abnormality (1 = yes or 0 = no); DBP: diastolic blood pressure (mm Hg); SBP: systolic blood pressure (mm Hg); HPT: high blood pressure defined as having SBP 2 160 or DBP 2 95 (1 = yes or 0 = no)58. How many dummy variables need to be included in the model for high blood pressure, HP a. - O b . c. 2 d. 3 e. 4 59. What is the estimated odds ratio for having CHD for a 55 year old compared to a 50 year controlling for all other variables in the model? a. 0.038 b. 0.828 PubH 6002: Biostatistical Applications for Public Health C. 0.962 d. 1.039 e. 1.208 60. Given the estimated odds of CHD for a 50-year-old smoker with a high catecholamine lev a cholesterol level of 210 mg/dl, an abnormal electrocardiogram, a DBP of 100 mm Hg, an a SBP of 140 mm Hg is 0.475, what is the corresponding risk of CHD? a. 0.32 b. 0.62 c. 1.48 d. 1.61 e. 3.11