Dispersion tests and adjustments for survival and case‐control studies | Zendy

Smith Philip J. | Zendy

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Dispersion tests and adjustments for survival and case‐control studies

Author(s) -

Smith Philip J.

Publication year - 1993

Publication title -

statistics in medicine

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.996

H-Index - 183

eISSN - 1097-0258

pISSN - 0277-6715

DOI - 10.1002/sim.4780121804

Subject(s) - variance (accounting) , dispersion (optics) , statistics , econometrics , standard error , nominal level , mathematics , confidence interval , economics , physics , accounting , optics

Cox and Snell have pointed out that when the empirical variance of a measured response y is quite different from its nominal variance under an assumed probability model, standard errors that are not adjusted for the discrepancy may yield misleading inferences. This article describes a test for assessing departures from nominal dispersion in survival analysis and case‐control studies. Also, a robust procedure for adjusting standard errors for these models is given.

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