Dergi Ara >>
Yıl:2011; Cilt: 21; Sayı: 2>> Özet
TAM METİN
Klinik Psikofarmakoloji Bülteni; 2011;21(2):91-92
P değeri zorbalığı: Etki büyüklüğü sorunu
L Citrome
New York University School of Medicine, New York-USA
İstatistiksel önemlilik mutlaka klinik önemlilik anlamına gelmez. P-değerinin 0.05'ten az olması sonucun önemli olacağını garanti etmez. Kliniksel ilişkinin değerlendirebilmesi için etki büyüklüğü (effect size) hesaplanması gerekmektedir. Number needed to treat (NNT) klinik çalışma sonuçlarını anlamaya yardımcı olan ve bir klinisyenin rakip girişimler arasındaki potansiyel farkları değerlendirmesine izin veren örnek bir etki büyüklüğü ölçüsüdür.
The tyranny of the P-value: effect size matters
Statistical significance does not necessarily imply clinical significance. A P-value of less than 0.05 does not guarantee that the result will be important. Effect size needs to be calculated in order to appraise clinical relevance. Number needed to treat (NNT) is an example of an effect size measure that helps translate clinical trial results and allows a clinician to evaluate potential differences between competing interventions.

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