Question

QUESTION 17 The following 2x2 table is constructed for a cohort study of 460 people in a village for the risk of contracting malaria using bed nets. Use the table to answer the following question: Which is the most appropriate measure of association to use in this situation is Relative Risk or Odds Ratio? Write your response in the space provided. Maleria No Malaria Total Use bed nets 12 264 276 Do not use bed nets 94 90 184 Total 106 354 460

Answer 1

Answer:

Cohort study of 460 people in village for risk of contracting malaria using bed nets

2x2 Contingency table

	Malaria	No Malaria	Total
Use bed nets	12 (a)	264 (b)	276
Do not use bed nets	94 (c)	90 (d)	184
Total	106	354	460

Exposed group = Use bed net

Control group = Do not use bed

In this case the most appropriate measure of association is the odds ratio. Odds ratio measures the association between an exposure and the outcome.

Odds ratio = (a/b)/(c/d) = 12/264 / 94/90 = 0.0435