BACKGROUND AND OBJECTIVES: Our aim was to construct a harmonized measure of activities of daily living (ADL) across six countries, and to evaluate the reliability and validity of this measure. METHODS: A population of 9,297 persons, aged 65-89 years, was drawn from the Comparison of Longitudinal European Studies on Aging (CLESA) study, which includes data from five European countries and Israel. Because the number, type, and response format of the ADL items differed across the six studies, a four-item scale was constructed to harmonize the data, using items common to most countries. A procedure was devised to substitute or construct items that were not available in two of the countries. RESULTS: Cronbach's alpha for the four-item ADL measure varied from 0.81 in Spain to 0.92 in Finland, and was similar to the alpha of scales including five or six items. Kappa scores between substituted or constructed items and the actual items varied from 0.50 to 0.78. In all countries, the percentage of persons with ADL disability differed significantly across age and was associated with chronic diseases, poor self-rated health, global disability, and home help utilization. CONCLUSION: The harmonized four-item ADL measure seems a reliable and valid instrument for comparing ADL disability in older people across countries.
BACKGROUND AND OBJECTIVES: Our aim was to construct a harmonized measure of activities of daily living (ADL) across six countries, and to evaluate the reliability and validity of this measure. METHODS: A population of 9,297 persons, aged 65-89 years, was drawn from the Comparison of Longitudinal European Studies on Aging (CLESA) study, which includes data from five European countries and Israel. Because the number, type, and response format of the ADL items differed across the six studies, a four-item scale was constructed to harmonize the data, using items common to most countries. A procedure was devised to substitute or construct items that were not available in two of the countries. RESULTS: Cronbach's alpha for the four-item ADL measure varied from 0.81 in Spain to 0.92 in Finland, and was similar to the alpha of scales including five or six items. Kappa scores between substituted or constructed items and the actual items varied from 0.50 to 0.78. In all countries, the percentage of persons with ADL disability differed significantly across age and was associated with chronic diseases, poor self-rated health, global disability, and home help utilization. CONCLUSION: The harmonized four-item ADL measure seems a reliable and valid instrument for comparing ADL disability in older people across countries.
Authors: Kate Williams; Anja Frei; Anders Vetsch; Fabienne Dobbels; Milo A Puhan; Katja Rüdell Journal: Health Qual Life Outcomes Date: 2012-03-13 Impact factor: 3.186
Authors: Nawi Ng; Paul Kowal; Kathleen Kahn; Nirmala Naidoo; Salim Abdullah; Ayaga Bawah; Fred Binka; Nguyen T K Chuc; Cornelius Debpuur; Thaddeus Egondi; F Xavier Gómez-Olivé; Mohammad Hakimi; Siddhivinayak Hirve; Abraham Hodgson; Sanjay Juvekar; Catherine Kyobutungi; Hoang Van Minh; Mathew A Mwanyangala; Rose Nathan; Abdur Razzaque; Osman Sankoh; P Kim Streatfield; Margaret Thorogood; Stig Wall; Siswanto Wilopo; Peter Byass; Stephen M Tollman; Somnath Chatterji Journal: Glob Health Action Date: 2010-09-27 Impact factor: 2.640
Authors: Anja Frei; Kate Williams; Anders Vetsch; Fabienne Dobbels; Laura Jacobs; Katja Rüdell; Milo A Puhan Journal: Health Qual Life Outcomes Date: 2011-12-20 Impact factor: 3.186
Authors: Perminder S Sachdev; Jessica W Lo; John D Crawford; Lisa Mellon; Anne Hickey; David Williams; Régis Bordet; Anne-Marie Mendyk; Patrick Gelé; Dominique Deplanque; Hee-Joon Bae; Jae-Sung Lim; Amy Brodtmann; Emilio Werden; Toby Cumming; Sebastian Köhler; Frans R J Verhey; Yan-Hong Dong; Hui Hui Tan; Christopher Chen; Xu Xin; Raj N Kalaria; Louise M Allan; Rufus O Akinyemi; Adesola Ogunniyi; Aleksandra Klimkowicz-Mrowiec; Martin Dichgans; Frank A Wollenweber; Vera Zietemann; Michael Hoffmann; David W Desmond; Thomas Linden; Christian Blomstrand; Björn Fagerberg; Ingmar Skoog; Olivier Godefroy; Mélanie Barbay; Martine Roussel; Byung-Chul Lee; Kyung-Ho Yu; Joanna Wardlaw; Stephen J Makin; Fergus N Doubal; Francesca M Chappell; Velandai K Srikanth; Amanda G Thrift; Geoffrey A Donnan; Nagaendran Kandiah; Russell J Chander; Xuling Lin; Charlotte Cordonnier; Solene Moulin; Costanza Rossi; Behnam Sabayan; David J Stott; J Wouter Jukema; Susanna Melkas; Hanna Jokinen; Timo Erkinjuntti; Vincent C T Mok; Adrian Wong; Bonnie Y K Lam; Didier Leys; Hilde Hénon; Stéphanie Bombois; Darren M Lipnicki; Nicole A Kochan Journal: Alzheimers Dement (Amst) Date: 2016-11-18
Authors: Perminder S Sachdev; Darren M Lipnicki; Nicole A Kochan; John D Crawford; Kenneth Rockwood; Shifu Xiao; Juan Li; Xia Li; Carol Brayne; Fiona E Matthews; Blossom C M Stephan; Richard B Lipton; Mindy J Katz; Karen Ritchie; Isabelle Carrière; Marie-Laure Ancelin; Sudha Seshadri; Rhoda Au; Alexa S Beiser; Linda C W Lam; Candy H Y Wong; Ada W T Fung; Ki Woong Kim; Ji Won Han; Tae Hui Kim; Ronald C Petersen; Rosebud O Roberts; Michelle M Mielke; Mary Ganguli; Hiroko H Dodge; Tiffany Hughes; Kaarin J Anstey; Nicolas Cherbuin; Peter Butterworth; Tze Pin Ng; Qi Gao; Simone Reppermund; Henry Brodaty; Kenichi Meguro; Nicole Schupf; Jennifer Manly; Yaakov Stern; Antonio Lobo; Raúl Lopez-Anton; Javier Santabárbara Journal: BMC Neurol Date: 2013-11-06 Impact factor: 2.474