Abstract
Tables are presented showing estimates of the number of subjects which is required to give an 80% or 90% chance of detecting various differences in forced expiratory volume in one second, forced vital capacity, total lung capacity, transfer factor, and residual volume between the mean of two groups by means of Student's t test.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Altman D. G. Size of clinical trials. Br Med J (Clin Res Ed) 1983 Jun 11;286(6381):1842–1843. doi: 10.1136/bmj.286.6381.1842. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Freiman J. A., Chalmers T. C., Smith H., Jr, Kuebler R. R. The importance of beta, the type II error and sample size in the design and interpretation of the randomized control trial. Survey of 71 "negative" trials. N Engl J Med. 1978 Sep 28;299(13):690–694. doi: 10.1056/NEJM197809282991304. [DOI] [PubMed] [Google Scholar]
- Lachin J. M. Introduction to sample size determination and power analysis for clinical trials. Control Clin Trials. 1981 Jun;2(2):93–113. doi: 10.1016/0197-2456(81)90001-5. [DOI] [PubMed] [Google Scholar]
- Reed J. F., 3rd, Slaichert W. Statistical proof in inconclusive 'negative' trials. Arch Intern Med. 1981 Sep;141(10):1307–1310. [PubMed] [Google Scholar]
- Sobol B. J., Sobol P. G. Per cent of predicted as the limit of normal in pulmonary function testing: a statistically valid approach. Thorax. 1979 Feb;34(1):1–3. doi: 10.1136/thx.34.1.1. [DOI] [PMC free article] [PubMed] [Google Scholar]