The paired availability design: A proposal for evaluating epidural analgesia during labor
Article first published online: 15 OCT 2006
Copyright © 1994 John Wiley & Sons, Ltd.
Statistics in Medicine
Volume 13, Issue 21, pages 2269–2278, 15 November 1994
How to Cite
Baker, S. G. and Lindeman, K. S. (1994), The paired availability design: A proposal for evaluating epidural analgesia during labor. Statist. Med., 13: 2269–2278. doi: 10.1002/sim.4780132108
- Issue published online: 15 OCT 2006
- Article first published online: 15 OCT 2006
- Manuscript Revised: NOV 1993
- Manuscript Received: MAR 1992
The paired availability design (PAD) can reduce selection bias when it is not possible to randomize subjects. PAD consists of independent pairs of experimental and control groups. Within each pair, the intervention is the availability of treatment not its receipt. In the experimental group, the new treatment is made available to all subjects although some may not receive it. In the control group, the experimental treatment is generally not available to subjects although some may receive it in special circumstances. We present a statistic to test a null hypothesis that the receipt of intervention will increase response by a specified non-zero amount δ. We propose this design for use in a study of the effect of epidural analgesia on the rate of Caesarean section.