Principles and Practice of Geriatric Psychiatry Third Edition Edited by Mohammed T. Abou-Saleh St George’s Hospital Medical School, London, UK Cornelius Katona University College London, London, UK Anand Kumar University of Illinois, Illinois, USA AJohn Wiley and Sons, Ltd., Publication Principles and Practice of Geriatric Psychiatry Principles and Practice of Geriatric Psychiatry Third Edition Edited by Mohammed T. Abou-Saleh St George’s Hospital Medical School, London, UK Cornelius Katona University College London, London, UK Anand Kumar University of Illinois, Illinois, USA AJohn Wiley and Sons, Ltd., Publication This edition first published 2011  2011 by John Wiley & Sons, Ltd. Wiley-Blackwell is an imprint of John Wiley & Sons, formed by the merger of Wiley’s global Scientific, Technical and Medical business with Blackwell Publishing. Registered office: John Wiley & Sons, Ltd, The Atrium, Southern Gate, Chichester, West Sussex, PO19 8SQ, UK Editorialoffices: 9600 Garsington Road, Oxford, OX4 2DQ, UK The Atrium, Southern Gate, Chichester, West Sussex, PO19 8SQ, UK 111 River Street, Hoboken, NJ 07030-5774, USA For details of our global editorial offices, for customer services and for information about how to apply for permission to reuse the copyright material in this book please see our website at www.wiley.com/wiley-blackwell. The right of the author to be identified as the author of this work has been asserted in accordance with the UK Copyright, Designs and Patents Act 1988. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, except as permitted by the UK Copyright, Designs and Patents Act 1988, without the prior permission of the publisher. Wiley also publishes its books in a variety of electronic formats. Some content that appears in print may not be available in electronic books. Designations used by companies to distinguish their products are often claimed as trademarks. All brand names and product names used in this book are trade names, service marks, trademarks or registered trademarks of their respective owners. The publisher is not associated with any product or vendor mentioned in this book. This publication is designed to provide accurate and authoritative information in regard to the subject matter covered. It is sold on the understanding that the publisher is not engaged in rendering professional services. If professional advice or other expert assistance is required, the services of a competent professional should be sought. Library of Congress Cataloging-in-Publication Data Principles and practice of geriatric psychiatry / [edited by] Mohammed T. Abou-Saleh, Cornelius Katona, Anand Kumar. –3rd ed. p. ; cm. Includes bibliographical references and index. ISBN 978-0-470-74723-0 (cloth) I. Abou-Saleh, Mohammed T. II. Katona, C. L. E. (Cornelius L. E.), 1954- III. Kumar, Anand, 1956- [DNLM: 1. Mental Disorders–diagnosis. 2. Aged. 3. Aging–physiology. 4. Aging–psychology. 5. Mental Disorders–therapy. WT 150] Geriatric psychiatry. 618.97(cid:1)689–dc22 2010025369 A catalogue record for this book is available from the British Library. This book is published in the following electronic formats: ePDF 9780470669594; Wiley Online Library 9780470669600 Set in 9/11 Times by Laserwords Private Limited, Chennai, India First Impression 2011 Dedication Dedicated to our wives and families Associate Editors Dave Anderson Mersey Care NHS Trust Older People’s Mental Health Services Sir Douglas Crawford Unit, Mossley Hill Hospital Park Avenue Liverpool L18 8BU, UK Chris Fox Folkestone Health Centre 15-25 Dover Road Folkestone Kent CT20 1JY, UK Mary Ganguli Western Psychiatric Institute and Clinic 3811 O’Hara St. Pittsburgh, PA 15213, USA Constantine G. Lyketsos The Johns Hopkins Bayview Medical Center 5300 Alpha Commons Drive Alpha Commons Building, 4th Floor Baltimore, MD 21224, USA Zuzana Walker Department of Mental Health Sciences St Margaret’s Hospital Epping Essex, CM16 6TN UK Kenneth Wilson St Catherine’s Hospital Church Road Birkenhead Wirral L42 OLQ, UK