Lumbar Spine Segmental Mobility Assessment: An Examination of Validity for Determining Intervention Strategies in Patients With Low Back Pain

The Measurement of Observer Agreement for Categorical Data

J. Richard Landis, Gary G. Koch · Biometrics · 1977 · 78.9K citations · Full text

Public Health, Biostatistics, Categorical Data Analysis +12

A Fear-Avoidance Beliefs Questionnaire (FABQ) and the role of fear-avoidance beliefs in chronic low back pain and disability

Gordon Waddell, Mary Newton, I.A. Henderson et al. · Pain · 1993 · 3.2K citations

Medicine, Psychology, Rehabilitation Medicine +16

High agreement but low Kappa: I. the problems of two paradoxes

Alvan R. Feinstein, Domenic V. Cicchetti · Journal of Clinical Epidemiology · 1990 · 2.9K citations

Social Sciences, Psychology, Social Psychology +7

Evaluation of Specific Stabilizing Exercise in the Treatment of Chronic Low Back Pain With Radiologic Diagnosis of Spondylolysis or Spondylolisthesis

Peter O’Sullivan, Grad Dip Manip Phyty, Lance Twomey et al. · Spine · 1997 · 1.1K citations

Medicine, Physical Medicine, Rehabilitation Medicine +17

A Comparison of a Modified Oswestry Low Back Pain Disability Questionnaire and the Quebec Back Pain Disability Scale

Julie M. Fritz, James J. Irrgang · Physical Therapy · 2001 · 1K citations · Full text

Medicine, Orthopaedic Surgery, Rehabilitation Medicine +17