Calculate an odds ratio for this data.

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In an outbreak of varicella (chickenpox) in Oregon in 2002, varicella was diagnosed in 21 of 160
vaccinated children compared with 2 of 9 unvaccinated children. The data are shown in the table
below.
Calculate an odds ratio for this data.
Vaccinated
Unvaccinated
Total
.95
.04
.53
Varicella
None of the above
21
2
23
Non-case
139
7
146
Total
Scenario and data modified from Principles of Epidemiology in Public Health Practice, Third Edition:
An Introduction to Applied Epidemiology and Biostatistics.
Choose one best answer. (round up to the second decimal)
160
9
169
Transcribed Image Text:In an outbreak of varicella (chickenpox) in Oregon in 2002, varicella was diagnosed in 21 of 160 vaccinated children compared with 2 of 9 unvaccinated children. The data are shown in the table below. Calculate an odds ratio for this data. Vaccinated Unvaccinated Total .95 .04 .53 Varicella None of the above 21 2 23 Non-case 139 7 146 Total Scenario and data modified from Principles of Epidemiology in Public Health Practice, Third Edition: An Introduction to Applied Epidemiology and Biostatistics. Choose one best answer. (round up to the second decimal) 160 9 169
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