TABLE OF CONTENTS Chapter 1 General introduction 8 Chapter 2 Measuring exercise adherence in patients with low back pain: development, validity, and reliability of the EXercise Adherence Scale (EXAS) 22 Chapter 3 Patient perspectives on using a smartphone application to support home-based exercise during physical therapy treatment: a qualitative study 44 Chapter 4 Effectiveness and cost-effectiveness of stratified blended physiotherapy in patients with non- specific low back pain: study protocol of a cluster randomized controlled trial 64 Chapter 5 The 3-Month Effectiveness of a Stratified Blended Physiotherapy Intervention in Patients With Nonspecific Low Back Pain: Cluster Randomized Controlled Trial 92 Chapter 6 Trajectories of Adherence to Home-Based Exercise Recommendations Among People With Low Back Pain: A Longitudinal Analysis 124 Chapter 7 Exploring the association between adherence to home-based exercise recommendations and recovery of nonspecific low back pain: a prospective cohort study. 146 Chapter 8 General discussion 164 Chapter 9 General summary 180 Chapter 10 Samenvatting 186 Appendices About the author List of publications Author’s contributions PhD portfolio Dankwoord 194 195 197 199 201
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