Analysis of a within-subject design with covariates
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Updated: Nov 1, 2026

Validation of a Psychosocial Intervention on Body Image in Older People: An Experimental Design
Published on: May 31, 2021
1Berlex Laboratories, Inc. Wayne, New Jersey 07470-7358, USA.
Abstract:
This paper deals with a method of analyzing incomplete data, forming a monotone pattern, from a within-subject design with baseline measurements. An assumption of multivariate normality with antedependence structure is made for both the baseline measurements and the response measurements. Adjusted means for the period-by-sequence cells and their dispersion matrix are obtained. Large sample tests are proposed for testing various hypotheses. A numerical example is given to illustrate the methodology.
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