Chapter 5. Analysis of Repeated Measures Data

5.1

Introduction

160

 

5.1.1

Basic Concepts of Repeated Measures

160

 

5.1.2

Types of Repeated Measures Analyses

161

 

5.1.3

A Statistical Model for Repeated Measures

161

5.2

Example: Mixed Model Analysis of Data from Basic Repeated Measures Design

163

 

5.2.1

Using the REPEATED Statement in PROC MIXED

165

 

5.2.2

Comparing Results from Two Covariance Structures

171

5.3

Modeling Covariance Structure

174

 

5.3.1

Some Candidate Covariance Structures

174

 

5.3.2

Selecting an Appropriate Covariance Model

177

 

5.3.3

Reassessing the Covariance Structure with a Means Model Accounting for Baseline Measurement

186

 

5.3.4

PROC MIXED Analysis of FEV1 Data

187

 

5.3.6

Inference on Treatment and Time Effects of FEV1 Data Using PROC MIXED

190

5.4

Example: Unequally ...

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