QUESTION 8 The following 2x2 table is constructed for a cohort study of 460 peop
ID: 3203524 • Letter: Q
Question
QUESTION 8
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:
The value of the most appropriate measure of association (Relative Risk or Odds Ratio) is:
Maleria
No Malaria
Total
Use bed nets
12
264
276
Do not use bed nets
94
90
184
Total
106
354
460
A.0.085
B.0.044
C.0.332
D.0.048
Maleria
No Malaria
Total
Use bed nets
12
264
276
Do not use bed nets
94
90
184
Total
106
354
460
Explanation / Answer
The odds ratio of getting malaria of using bed nets than not using them is:
[ ( 12 / 276 ) / (264 / 276) ] / [( 94 / 184 ) / (90 / 184) ]
= 0.044
Answer: 0.044
Odds ratio is appropriate as here we are testing if the presence of bed nets has an association with the presence of malaria.
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