| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10514396 | Journal of Clinical Epidemiology | 2005 | 9 Pages |
Abstract
We suggest a minimum of 100 events and 100 nonevents for external validation samples. Specific hypotheses may, however, require substantially higher effective sample sizes to obtain adequate power.
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Authors
Yvonne Vergouwe, Ewout W. Steyerberg, Marinus J.C. Eijkemans, J. Dik F. Habbema,