Results 241 to 250 of about 2,746,581 (301)

A framework for conducting GWAS using repeated measures data with an application to childhood BMI. [PDF]

open access: yesNat Commun
Burrows K   +19 more
europepmc   +1 more source

Repeated Measurement Designs

Calcutta Statistical Association Bulletin, 1983
In the present paper Repeated Measurement Designs (RMD's) have been studied under mixed effects model, assuming unit effects to be random and most of the optimality results of RMD's proved under fixed effects model by Hedayat et. al (1978), Magda (1980) and Cheng et. al (1980) have been reestablished in the context of mixed effects model.
Mukhopadhyay, A. C., Saha, Rita
openaire   +2 more sources

Repeated measures with zeros

Statistical Methods in Medical Research, 2002
Consider repeated measures data with many zeros. For the case with one grouping factor and one repeated measure, we examine several models, assuming that the nonzero data are roughly lognormal. One of the simplest approaches is to model the zeros as left-censored observations from the lognormal distribution. A random effectis assumed for subjects. The
Berk, K. N., Lachenbruch, P. A.
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Repeated measurements in stochastic mechanics

Physical Review D, 1986
Stochastic mechanics provides a probabilistic scheme for the description of quantum systems. Grabert, Haaumlnggi, and Talkner, and Nelson have pointed out that its multitime correlations seem to be in disagreement with quantum-mechanical predictions.
Blanchard Ph, Golin S, SERVA, Maurizio
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Repeated measurements: What is measured and what repeats?

Statistics in Medicine, 1990
AbstractThis paper expresses a personal view of experiments involving repeated measurements; it attempts to classify types of experiment and approaches to statistical analysis: no novel procedures are proposed, only a systematic outlook on objectives and methods.
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Repeated Measurements with the Wisc

Psychological Reports, 1962
An examination was made of scores obtained on the WISC with repeated measurements of the same population. Ss were 65 educable mentally retarded boys. They were all male residents at the Training School who had been given the complete WISC at least 3 times.
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Repeated Measures Modell

1994
Im Unterschied zu den vorausgegangenen Kapiteln nehmen wir an, das an einem Objekt/Subjekt (z.B. Patient) nicht nur eine Beobachtung vorgenommen wird, sondern das wiederholte Beobachtungen vorliegen. Diese wiederholten Messungen (repeated measures oder repeated measurements) werden zu vorher definierten Zeitpunkten erhoben und sollen Auskunft geben ...
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Repeatability of sonographic measurements in clubfeet

Acta Radiologica, 2004
Purpose: To assess the intra‐ and interobserver agreement of ultrasound assessment of clubfoot patho‐anatomy in early childhood. Material and Methods: Seventeen clubfeet in 12 children were sequentially scanned by 2 examiners and repeat assessments were carried out independently.
Y, Aurell   +3 more
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Heterogeneous Variances in Repeated Measures

Biometrical Journal, 1995
AbstractA general approach to repeated measures analysis described in MCGILCHRIST and CULLIS (1991) is extended to general linear models in which there is a homogeneous correlation structure such as a stationary process but the variances are heterogeneous over time.
Wu, Yuan, McGilchrist, C. A.
openaire   +1 more source

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