Why the study?
Does the availability of epidural analgesia affect the rate of Caesarean section during labor?
Does the availability of epidural analgesia affect the rate of Caesarean section during labor?
The paired availability design is proposed as a method to reduce selection bias in observational studies where randomization is not possible, such as evaluating epidural analgesia during labor.
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May reduce selection bias when assessing epidural effects on Caesarean rates; extends causal testing methods for paired availability designs.
Baker et al. (1994) studied this question.
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