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Asked by tpattwork13
What are the odds that an infection develops with an emergency c-section versus a planned c-section?
In this scenario, the odds ratio is the relationship between the odds of infection in the emergency c-section group and the odds of infection in the planned c-section group. We will use the same data as our last example, summarized here:
                                                                      Emergency c-section                              Planned c-section
              Infection                                                7 (a)                                                           2 (c)
              No infection                                          3 (b)                                                           8 (d)
The OR can be calculated using formula:Â OR = (a/b) / (c/d)
                                                                                  (7/3) / (2/8)
                                                                                  2.33 / 0.25
                                                                                  9.32
The OR is often not calculated for you, so you may need this formula. However, what is critical is interpreting the OR. The OR in this case is interpreted as the women who received emergency c-sections developed wound infections 9.32 more often than women who underwent planned c-sections.
Do you think an odds ratio of 9.32 is clinically significant?
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Yes
 Â
No
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