Journal ArticleDOI
Inference and missing data
TLDR
In this article, it was shown that ignoring the process that causes missing data when making sampling distribution inferences about the parameter of the data, θ, is generally appropriate if and only if the missing data are missing at random and the observed data are observed at random, and then such inferences are generally conditional on the observed pattern of missing data.Abstract:
Two results are presented concerning inference when data may be missing. First, ignoring the process that causes missing data when making sampling distribution inferences about the parameter of the data, θ, is generally appropriate if and only if the missing data are “missing at random” and the observed data are “observed at random,” and then such inferences are generally conditional on the observed pattern of missing data. Second, ignoring the process that causes missing data when making Bayesian inferences about θ is generally appropriate if and only if the missing data are missing at random and the parameter of the missing data is “independent” of θ. Examples and discussion indicating the implications of these results are included.read more
Citations
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Journal ArticleDOI
Reparameterizing the pattern mixture model for sensitivity analyses under informative dropout.
TL;DR: A reparameterization of the pattern mixture model is proposed that allows investigation of sensitivity to assumptions about nonidentified parameters in both the mean and variance, allows consideration of a wide range of nonignorable missing-data mechanisms, and has intuitive appeal for eliciting plausible missing- data mechanisms.
Journal ArticleDOI
Trends in Gender Differences in Cardiac Care and Outcome After Acute Myocardial Infarction in Western Sweden: A Report From the Swedish Web System for Enhancement of Evidence-Based Care in Heart Disease Evaluated According to Recommended Therapies (SWEDEHEART)
Björn Redfors,Oskar Angerås,Truls Råmunddal,Petur Petursson,Inger Haraldsson,Christian Dworeck,Jacob Odenstedt,Dan Ioaness,A. Ravn-Fischer,Peder Wellin,Helén Sjöland,Lale Tokgozoglu,Hans Tygesen,Erik Frick,Rickard Roupe,Per Albertsson,Elmir Omerovic +16 more
TL;DR: Women on average have better adjusted prognosis than men after acute MI; however, younger women and women with ST-segment elevation MI have disproportionately poor prognosis and are less likely to be prescribed evidence-based treatment.
Journal ArticleDOI
Vitamin D status at breast cancer diagnosis: correlation with tumor characteristics, disease outcome and genetic determinants of vitamin D insufficiency
Sigrid Hatse,Diether Lambrechts,Annemieke Verstuyf,Ann Smeets,Barbara Brouwers,T. Vandorpe,Olivier Brouckaert,Gilian Peuteman,Annouschka Laenen,Lieve Verlinden,Carsten Kriebitzsch,Anne-Sophie Dieudonné,Robert Paridaens,Patrick Neven,Marie-Rose Christiaens,Roger Bouillon,Hans Wildiers +16 more
TL;DR: High vitamin D levels at early breast cancer diagnosis correlate with lower tumor size and better OS, and improve breast cancer-specific outcome, especially in postmenopausal patients.
Journal ArticleDOI
Physiologic Frailty and Fragility Fracture in HIV-Infected Male Veterans
Julie A. Womack,Joseph L. Goulet,Cynthia Gibert,Cynthia Brandt,Melissa Skanderson,Barbara Gulanski,David Rimland,Maria C. Rodriguez-Barradas,Janet P. Tate,Michael T. Yin,Amy C. Justice +10 more
TL;DR: Frailty, as measured by the VACS Index, is an important predictor of fragility fractures among HIV-infected male Veterans.
Journal ArticleDOI
Functional and Motor Outcome 5 Years After Stroke Is Equivalent to Outcome at 2 Months Follow-Up of the Collaborative Evaluation of Rehabilitation in Stroke Across Europe
Sarah Meyer,Geert Verheyden,Nadine Brinkmann,Eddy Dejaeger,Willy De Weerdt,Hilde Feys,Andreas R. Gantenbein,W. Jenni,Annouschka Laenen,Nadina B. Lincoln,Koen Putman,Birgit Schuback,W. Schupp,Vincent Thijs,Liesbet De Wit +14 more
TL;DR: Five-year follow-up revealed deterioration in functional and motor outcome, with a return to the level measured at 2 months, and increasing age and increasing stroke severity negatively affected recovery up to 5 years after stroke.
References
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Book
Bayesian inference in statistical analysis
George E. P. Box,George C. Tiao +1 more
TL;DR: In this article, the effect of non-normality on inference about a population mean with generalizations was investigated. But the authors focused on the effect on the mean with information from more than one source.
Journal ArticleDOI
Bayesian Inference in Statistical Analysis
Journal ArticleDOI
Maximum Likelihood Estimates for a Multivariate Normal Distribution when Some Observations are Missing
TL;DR: In this paper, the authors give an approach to derive maximum likelihood estimates of parameters of multivariate normal distributions in cases where some observations are missing (Edgett [2] and Lord [3], [4]).
Journal ArticleDOI
Missing Observations in Multivariate Statistics I. Review of the Literature
TL;DR: In this paper, a review of the literature on the problem of handling multivariate data with observations missing on some or all of the variables under study is presented, where the authors examine the ways that statisticians have devised to estimate means, variances, correlations and linear regression functions.