Exercise adherence improves long-term patient outcome in patients with osteoarthritis of the hip and/or knee Martijn F Pisters 1,2 , MSc, PT; Cindy Veenhof 1 , PhD, PT; François G Schellevis 1,3 , PhD, MD; Jos WR Twisk, PhD 4 ; Joost Dekker 5 , PhD; Dinny H De Bakker, PhD 1,6 . 1 Netherlands Institute for Health Services Research (NIVEL), Utrecht, The Netherlands; 2 Clinical Health Science, University Medical Center Utrecht, Utrecht, The Netherlands; 3 Department of General Practice, EMGO Institute, VU University Medical Center Amsterdam, Amsterdam, The Netherlands; 4 Department of Clinical Epidemiology and Biostatistics, EMGO Institute, VU University Medical Center Amsterdam, Amsterdam, The Netherlands; 5 Department of Rehabilitation Medicine & Department of Psychiatry, EMGO Institute, VU University Medical Center Amsterdam, Amsterdam, The Netherlands; 6 Tranzo, Tilburg University, Tilburg, The Netherlands . Word limit: 3800 (current version: 3738) Address correspondence to Martijn F Pisters, MSc, PT, Netherlands Institute for Health Services Research (NIVEL), P.O. Box 1568, 3500 BN, Utrecht, The Netherlands. Tel: +31-30-2729707; fax: +31-30-2729729. E-mail address: m.pisters@nivel.nl Version: 20 JAN 2010 Grant supporter: the Dutch Arthritis Association. Original Article Arthritis Care & Research DOI 10.1002/acr.20182 © 2010 American College of Rheumatology Received: Aug 11, 2009; Revised: Jan 20, 2010; Accepted: Feb 23, 2010