K. M. Wittkowski

Publications35
h-index8
Citations232
Highly Influential Citations5
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Friedman-Type Statistics and Consistent Multiple Comparisons for Unbalanced Designs with Missing Data
Abstract A generalization of the Friedman test using the marginal likelihood principle (Kalbfleisch and Prentice 1973) is presented and its asymptotic power given. It allows use of a variety of score… Expand
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An Extension to Wittkowski
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Building a Statistical Expert System with Knowledge Bases of Different Levels of Abstraction
TLDR
Statistical analysis is predetermined by the way a (prospective) experiment is planned or data are collected in a (retrospective) study. Expand
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Preventing the heterosexual spread of AIDS: what is the best advice if compliance is taken into account?
It has been recently advocated that avoiding partners who may be at high risk of carrying HIV provides 5000-fold better protection against HIV infection than usage of condoms [1]. In this paper, it… Expand
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Backcalculation of the number infected with human immunodeficiency virus in Germany.
The method of backcalculation was used to estimate the cumulative number of human immunodeficiency virus type 1 (HIV-1)-infected adults in Germany from reporting delay-corrected surveillance data on… Expand
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An asymptotic UMP sign test for discretised data
TLDR
This note addresses the problem of ties in the sign test for discretised data. Expand
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Evaluation of seroepidemiological associations between HIV-infection, hepatitis B and other sexually transmitted diseases in African patients
To assess the possible role of sexually transmitted diseases as cofactors for the spread of AIDS, 248 adult patients were tested for the presence of antibodies against human immunodeficiency virus… Expand
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Analytical approaches to reporting long-term clinical trial data
ABSTRACT Background and scope: Long-term clinical studies are essential for monitoring the effectiveness and safety of a drug. Information provided by long-term clinical studies complements the… Expand
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Statistical knowledge-based systems--critical remarks and requirements for approval.
TLDR
The term ’statistical expert system’ has been used extensively, although it is still ill-defined. Expand
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[Time order error and position effect of a standardized stimulus in discrimination of short time duration].
In comparison judgments of two successively presented time intervals ranging from 30 to 70 msec a time-order error (TOE) as well as a systematic effect depending on the constant position error (CPE)… Expand
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