Introduction Background The first e

Introduction
Background The first edition of this book was written because clinicians and researchers often seemed unaware of the wide variety of measurement techniques available in health services research. This was unfortunate, because research funds are wasted when studies do not use the best measurements available, and less scientific evidence is accumulated if different methods are used in different studies. In addition to serving as a guide to available measures, the book also included several criticisms of the current state of development of health measurement overall. In the years since the first edition was published, progress has been made in consolidating the field of health measurement. It remains true that the quality of health measurements is somewhat uneven, but several promising signs are visible. In place of the enthusiastic proliferation of hastily constructed measures that typified the 1970s, attention is being paid to consolidating information on a narrower range of quality instruments. These are being used more consistently in growing numbers of studies, providing genuinely comparative information. Time may have come to remove our comment in the first edition that bemoaned the tendency to reinvent Activities of Daily Living scales. Furthermore, methodological studies that test the accuracy of measurements now use more sophisticated approaches, and obvious statistical errors are rare. Finally, several books are available to help the user locate the most suitable measurement scale (1–12). Web resources are increasingly available, including a data base (www.qolid.org) run by the MAPI Research Institute in Lyon that provides brief summaries of over 450 instruments; reviews and copies of the questionnaires are available to paid subscribers. The Buros Mental Health Measurement Yearbooks are now available online and can be searched for a fee at http://buros.unl.edu/buros/jsp/search.jsp. A compendium of quality of life measures can be purchased from www.euromed.uk.com/ qolcompendium.htm. Another large collection of quality of life measures assembled by Salek is available on CD or on the Internet at http://www .wiley.com/legacy/products/subject/reference/salek _index.html
In succeeding chapters, we review a selection of the leading health measurement methods. Each chapter includes a critical comparison between the methods examined to help readers choose the method most suitable for their purposes. Descriptions in this book are intended to be sufficiently detailed to permit readers to apply and to score the instrument, although in many cases a manual is available from the original authors of the instrument that supplies additional information.

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แนะนำ Background The first edition of this book was written because clinicians and researchers often seemed unaware of the wide variety of measurement techniques available in health services research. This was unfortunate, because research funds are wasted when studies do not use the best measurements available, and less scientific evidence is accumulated if different methods are used in different studies. In addition to serving as a guide to available measures, the book also included several criticisms of the current state of development of health measurement overall. In the years since the first edition was published, progress has been made in consolidating the field of health measurement. It remains true that the quality of health measurements is somewhat uneven, but several promising signs are visible. In place of the enthusiastic proliferation of hastily constructed measures that typified the 1970s, attention is being paid to consolidating information on a narrower range of quality instruments. These are being used more consistently in growing numbers of studies, providing genuinely comparative information. Time may have come to remove our comment in the first edition that bemoaned the tendency to reinvent Activities of Daily Living scales. Furthermore, methodological studies that test the accuracy of measurements now use more sophisticated approaches, and obvious statistical errors are rare. Finally, several books are available to help the user locate the most suitable measurement scale (1–12). Web resources are increasingly available, including a data base (www.qolid.org) run by the MAPI Research Institute in Lyon that provides brief summaries of over 450 instruments; reviews and copies of the questionnaires are available to paid subscribers. The Buros Mental Health Measurement Yearbooks are now available online and can be searched for a fee at http://buros.unl.edu/buros/jsp/search.jsp. A compendium of quality of life measures can be purchased from www.euromed.uk.com/ qolcompendium.htm. Another large collection of quality of life measures assembled by Salek is available on CD or on the Internet at http://www .wiley.com/legacy/products/subject/reference/salek _index.html In succeeding chapters, we review a selection of the leading health measurement methods. Each chapter includes a critical comparison between the methods examined to help readers choose the method most suitable for their purposes. Descriptions in this book are intended to be sufficiently detailed to permit readers to apply and to score the instrument, although in many cases a manual is available from the original authors of the instrument that supplies additional information.

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