14.38 14.37 High blood pressure and cardiovascular disease. There is much eviden

Question

14.38

14.37 High blood pressure and cardiovascular disease. There is much evidence that high blood pressure is associated with increased risk of death from cardiovas- cular disease. A major study of this association examined 3338 men with high blood pressure and 2676 men with low blood pressure. During the period of the study, 21 men in the low-blood-pressure group and 55 in the high- blood-pressure group died from cardiovascular disease. (a) Find the proportion of men who died from cardio- vascular disease in the high-blood-pressure group. Then calculate the odds. (b) Do the same for the low-blood-pressure group. (c) Now calculate the odds ratio with the odds for the high-blood-pressure group in the numerator. Describe the result in words. 14.38 High blood pressure and cardiovascular disease. Refer to the study of cardiovascular disease and blood pressure in Exercise 14.37. Computer output for a logistic regression analysis of these data gives the estimated slope bj = 0.7505 with standard error SE,, = 0.2578. (a) Give a 95% confidence interval for the slope. (b) Calculate the X” statistic for testing the null hypoth- esis that the slope is zero and use Table F to find an approximate P-value. (c) Write a short summary of your results and conclusions.

Explanation / Answer

(As per Chegg guidelines i am providing first question answer)

a) proportion(high BP) = 2676/3338 = 0.8017

b) proportion (LOW BP) = 21/55 = 0.3818

c) Required odds ratio = 2676 : 662

if there is 3338 situations then high BP occurs in 2676 time as well as not occurs in 662 times   

  

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