Question

1. Who is most likely to have prevalent coronary heart disease?[TR1]

Test if there are significant differences in the following risk factors between persons with and without prevalent coronary heart disease (CHD). Summarize the statistical results in the table below and then compare risk factors in persons with and without prevalent CHD. Be sure to indicate what statistical tests were used in the footnote to the table and in a brief summary of a paragraph or less.

Patient Characteristic*	History of CHD (n = 194)	No History of CHD (n = 4240)	p-value*
Age, years	57.47938	49.58019	<0.001
Systolic blood pressure, mmHg	144.9974	132.3546	<0.001
Diastolic blood pressure, mmHg	87.14433	82.89776	<0.001
Total serum cholesterol, mg/dL	243.1979	236.6995	0.048604
Body mass index	26.83309	25.8008	0.000606

[TR1]The data looks good but there is much more that can be said about the findings. When providing a summary, you should provide depth about the data, it’s meaning and how it answers the research question.

Answer 1

in the given research question i it is to test whether there a significant difference between the risk of coronary heart disease between a individual who have history of coronary heart disease and the individual who has no history of coronary heart disase.

so the sample of 194 individuals who have history of CHD is compared with the sample of 4240 individuals who has no history of CHD

their mean age, systolic blood pressure, diastolic blood pressure, total serum control and body mass index was compared for both the groups and Z test was applied to find the statistic and corresponding p- value are noted ( as given in the table)

if we test the hypothesis to check the existence of significant difference at significant level

we found that all the corresponding p values are less than alpha ()

and we know if p value is less than alpha then we reject the null hypothesis of no difference and claim that there is significant difference between the risk factors between individuals  with history of CHD and without history of coronary heart disease (CHD)

this implies that the person with history of CHD more likely to have CHD