Exercise: Diabetes and high blood pressure in the 2005 M.Sc. questionnaire

People with diabetes are are increased risk of several health problems, including high blood pressure. In the 2005 M.Sc. questionnaire, respondents were asked

Have you ever been diagnosed as having:
(please tick all that apply)
	asthma		cancer
	diabetes		heart disease
	high blood pressure		other long-term disease
			(please write in)	_________________________

In this exercise, we look at the relationship between reported diabetes and high blood pressure.

This is a crosstabulation:

Diabetes	High blood pressure		Total
	No	Yes
No	172	20	192
Yes	7	3	10
Total	179	23	202

Questions

1. What kinds of variables are diabetes and high blood pressure?

Check suggested answer 1.

2. Which cell of the table would have the smallest expected frequency and, roughly, what would this be?

Check suggested answer 2.

3. What statistical method should be used to test the null hypothesis that diabetes and high blood pressure are unrelated in this population, and why?

Check suggested answer 3.

4. The test gives P = 0.09. What can we conclude about high blood pressure and diabetes?

Check suggested answer 4.

We shall return to these data next week.

To Applied Biostatistics index.

To Martin Bland's M.Sc. index.

To Martin Bland's home page.

This page maintained by Martin Bland.
Last updated: 10 November, 2006.

Back to top.