Journal of Cataract & Refractive Surgery
Volume 30, Issue 11 , Pages 2425-2426 , November 2004

Beyond the P: III: Possible insignificance of the nonsignificant P value

  • Kirk R. Wilhelmus, MD,PhD

      Affiliations

    • Corresponding Author InformationReprint requests to Kirk R. Wilhelmus, MD, PhD, 6565 Fannin, NC-205, Houston, Texas 77030, USA

References 

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  4. Javitt JC. When does the failure to find a difference mean that there is none?. Arch Ophthalmol. 1989;107:1034–1040
  5. Tarnow-Mordi WO, Healy MJR. Distinguishing between “no evidence of effect” and “evidence of no effect” in randomised controlled trials and other comparisons. Arch Dis Child. 1999;80:210–211
  6. Sterne JAC, Davey Smith G. Sifting the evidence—what's wrong with significance tests?. BMJ. 2001;322:226–231
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  8. Vickers AJ. Underpowering in randomized trials reporting a sample size calculation. J Clin Epidemiol. 2003;56:717–720
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  11. Ware JH, Mosteller F, Delgado F, et al.  P values. In:  Bailar JC,  Mosteller F editor. Medical Uses of Statistics. 2nd ed. Boston, MA: NEJM Books; 1992;p. 181–200

☆ Supported by a grant from the National Eye Institute, a senior scientific investigator award from Research to Prevent Blindness, and the Sid W. Richardson Foundation.

PII: S0886-3350(04)00848-X

doi: 10.1016/j.jcrs.2004.06.083

Journal of Cataract & Refractive Surgery
Volume 30, Issue 11 , Pages 2425-2426 , November 2004

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