Dichotomising continuous data while retaining statistical power using a distributional approach

Peacock JL, Sauzet O, Ewings SM, Kerry SM (2012)
Statistics In Medicine 31(26): 3089-3103.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Peacock, J. L.; Sauzet, OdileUniBi; Ewings, S. M.; Kerry, S. M.
Abstract / Bemerkung
Dichotomisation of continuous data is known to be hugely problematic because information is lost, power is reduced and relationships may be obscured or changed. However, not only are differences in means difficult for clinicians to interpret, but thresholds also occur in many areas of medical practice and cannot be ignored. In recognition of both the problems of dichotomisation and the ways in which it may be useful clinically, we have used a distributional approach to derive a difference in proportions with a 95% CI that retains the precision and the power of the CI for the equivalent difference in means. In this way, we propose a dual approach that analyses continuous data using both means and proportions to replace dichotomisation alone and that may be useful in certain situations. We illustrate this work with examples and simulations that show good performance of the parametric approach under standard distributional assumptions from our own research and from the literature. Copyright (c) 2012 John Wiley & Sons, Ltd.
Stichworte
normal distribution; dichotomisation; statistical power; CI
Erscheinungsjahr
2012
Zeitschriftentitel
Statistics In Medicine
Band
31
Ausgabe
26
Seite(n)
3089-3103
ISSN
0277-6715
Page URI
https://pub.uni-bielefeld.de/record/2544091

Zitieren

Peacock JL, Sauzet O, Ewings SM, Kerry SM. Dichotomising continuous data while retaining statistical power using a distributional approach. Statistics In Medicine. 2012;31(26):3089-3103.
Peacock, J. L., Sauzet, O., Ewings, S. M., & Kerry, S. M. (2012). Dichotomising continuous data while retaining statistical power using a distributional approach. Statistics In Medicine, 31(26), 3089-3103. doi:10.1002/sim.5354
Peacock, J. L., Sauzet, Odile, Ewings, S. M., and Kerry, S. M. 2012. “Dichotomising continuous data while retaining statistical power using a distributional approach”. Statistics In Medicine 31 (26): 3089-3103.
Peacock, J. L., Sauzet, O., Ewings, S. M., and Kerry, S. M. (2012). Dichotomising continuous data while retaining statistical power using a distributional approach. Statistics In Medicine 31, 3089-3103.
Peacock, J.L., et al., 2012. Dichotomising continuous data while retaining statistical power using a distributional approach. Statistics In Medicine, 31(26), p 3089-3103.
J.L. Peacock, et al., “Dichotomising continuous data while retaining statistical power using a distributional approach”, Statistics In Medicine, vol. 31, 2012, pp. 3089-3103.
Peacock, J.L., Sauzet, O., Ewings, S.M., Kerry, S.M.: Dichotomising continuous data while retaining statistical power using a distributional approach. Statistics In Medicine. 31, 3089-3103 (2012).
Peacock, J. L., Sauzet, Odile, Ewings, S. M., and Kerry, S. M. “Dichotomising continuous data while retaining statistical power using a distributional approach”. Statistics In Medicine 31.26 (2012): 3089-3103.

19 Zitationen in Europe PMC

Daten bereitgestellt von Europe PubMed Central.

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