You study enrolled

Your study enrolled 1,000 25 year old women to examine diagnosis of breast cancer by age 50. Your statistician emails you the regression model output including beta coefficients (bi) and hazard ratios (HR) with corresponding 95% confidence intervals (CI). However, when you download the file the column for the hazard ratios is missing (see below). You have a tight deadline and must quickly submit a report with interpretation of the results. 95% CI Race/Ethnicity (ref = white) Black 0.576 (1.74 - 1.82) Hispanic 0.345 (1.35 - 1.50) Age 0.020 (1.01 - 1.05) Income (US $) 0.003 (0.89 - 1.01) Obese (ref = not obese) 0.289 (1.30 - 1.39) Physical Activity (ref = never) 1 - 4 times a month -0.136 (0.85 - 1.02) 2 4 times a month -0.467 (0.60 - 0.69) Smoking (ref = non-smoker) 0.148 (1.11 - 1.22) Alcohol Use (ref = never drinker) 0.052 (1.00 - 1.06) # of Chronic Stressors 0.073 (1.05 - 1.10) a. Calculate the hazard ratios for each independent variable. (4pts) b. Identify which independent variables are statistically significant in the model. Explain why. (4pts) c. Interpret the hazard ratio for one dichotomous variable and one continuous variable identified in part b. (4pts)