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E-book
Author Vet, Henrica C. W. de.

Title Measurement in Medicine : a Practical Guide
Published Cambridge : Cambridge University Press, 2011
Online access available from:
Cambridge Books Online    View Resource Record  

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Description 1 online resource (350 pages)
Series Practical Guides to Biostatistics and Epidemiology
Practical guides to biostatistics and epidemiology.
Contents Cover; Title; Copyright; Contents; Preface; 1 Introduction; 1.1 Why this textbook on measurement in medicine?; 1.2 Clinimetrics versus psychometrics; 1.3 Terminology and definitions; 1.4 Scope of measurements in medicine; 1.5 For whom is this book written?; 1.6 Structure of the book; 1.7 Examples, data sets, software and assignments; 2 Concepts, theories and models, and types of measurements; 2.1 Introduction; 2.2 Conceptual models; 2.3 Characteristics of measurements; From diagnosis to outcome measurements; From clinician-based to patient-based measurements
3. Choice between a reflective and a formative model4. Cross-cultural adaptation of an item; 5. Use of sum-scores; 4 Field-testing: item reduction and data structure; 4.1 Introduction; 4.2 Examining the item scores; 4.2.1 Missing scores; 4.2.2 Distribution of item scores; 4.3 Importance of the items; 4.4 Examining the dimensionality of the data: factor analysis; 4.4.1 Principles of exploratory factor analysis; 4.4.2 Determining the number of factors; 4.4.2.1 Step 1: correlation of items; 4.4.2.2 Step 2: the number of factors to be extracted; 4.4.3 Rotation and interpreting the factors
3.2.3 Purpose of measurement3.3 Choice of measurement method; 3.4 Selecting items; 3.4.1 Getting input for the items of a questionnaire: literature and experts; 3.4.1.1 Literature; 3.4.1.2 Experts; 3.4.1.3 An example of item selection for a patient-reported outcomes instrument; 3.4.1.4 An example of item selection for a non-patient-reported outcomes instrument; Summing up with or without using weights; 3.4.2 Formulating items: first draft; 3.4.3 Things to keep in mind; 3.5 Scores for items; 3.5.1 Scoring options; 3.5.2 Which option to choose?; 3.6 Scores for scales and indexes
3.6.1 Summarizing scores in reflective modelsSumming up with or without using weights; 3.6.2 Summarizing scores in formative models; 3.6.3 Weighted scores; 3.6.3.1 How and by who are weights assigned; Judgemental weights; Empirical weights; 3.6.3.2 Preference weighting or utility analysis; 3.6.3.3 Alternative methods; 3.7 Pilot-testing; 3.7.1 Pilot-testing of patient-reported outcomes instruments; 3.7.2 Pilot-testing of non-patient-reported outcomes instruments; 3.8 Summary; Assignments; 1. Definition of a construct; 2. Choice between objective and subjective measurements
From objective to subjective measurementsFrom unidimensional to multidimensional characteristics; From observable to non-observable characteristics; 2.4 Conceptual framework: reflective and formative models; 2.5 Measurement theories; 2.5.1 Classical test theory; 2.5.2 Item response theory; 2.6 Summary; Assignments; 1. Outcome measures in a randomized clinical trial; 2. What is the construct?; 3. Item response theory; 3 Development of a measurement instrument; 3.1 Introduction; 3.2 Definition and elaboration of the construct to be measured; 3.2.1 Construct; 3.2.2 Target population
Summary Provides methods to develop and evaluate measurement instruments in all fields of medicine and quality standards for all measurement properties
Notes 4.4.3.1 Step 3: rotation
Bibliography Includes bibliographical references (pages 315-327) and index
Notes Print version record
Subject Clinical medicine -- Methods.
Clinical medicine -- Statistical methods.
Diagnostic Techniques and Procedures
Medical care -- Evaluation -- Methodology.
Outcome assessment (Medical care)
Psychometrics.
Statistics.
Epidemiologic Methods.
Clinical Medicine -- methods.
Diagnostic Techniques and Procedures.
Outcome Assessment (Health Care)
Psychometrics.
Statistics as Topic.
Form Electronic book
Author Knol, Dirk L
Mokkink, Lidwine B
Terwee, Caroline B
ISBN 0511996217 (electronic bk.)
1139137549
1139144871 (electronic bk.)
1283316552
9780511996214 (electronic bk.)
9781139137546
9781139144872 (electronic bk.)
9781283316552