Original articles

885 Effects of Exercise Programs on Falls and Mobility in Frail and Pre-Frail Older Adults: A Multicenter Randomized Controlled Trial
Marjan J. Faber, PhD, Ruud J. Bosscher, PhD, Marijke J. Chin A Paw, PhD, Piet C. van Wieringen, PhD
897 Spinal Stenosis, Back Pain, or No Symptoms at All? A Masked Study Comparing Radiologic and Electrodiagnostic Diagnoses to the Clinical Impression
Andrew J. Haig, MD, Henry C. Tong, MD, MS, Karen S. Yamakawa, MS, Douglas J. Quint, MD, Julian T. Hoff, MD, Anthony Chiodo, MD, Jennifer A. Miner, MBA, Vaishali R. Choksi, MD, Michael E. Geisser, PhD, Christopher M. Parres, BS
904 Vitamin D Deficiency and Osteoporosis in Rehabilitation Inpatients
Leonid M. Shinchuk, MD, Leslie Morse, DO, Nadia Huancahuari, Seth Arum, MD, Tai C. Chen, PhD, Michael F. Holick, MD, PhD
909 Side Effects and Adverse Events Related to Intraligamentous Injection of Sclerosing Solutions (Prolotherapy) for Back and Neck Pain: A Survey of Practitioners
Simon Dagenais, DC, PhD, Oladele Ogunseitan, MPH, PhD, Scott Haldeman, DC, MD, PhD, James R. Wooley, DC, Robert L. Newcomb, PhD
914 The Relation Between Previous Fractures and Physical Performance in Elderly Women
Paul Gerdhem, MD, PhD, Karin A. Ringsberg, PhD, Kristina Åkesson, MD, PhD
918 Validity and Reliability of the Modified Shuttle Walk Test in Patients With Chronic Obstructive Pulmonary Disease
Loredana A. Campo, BScN, BScPT, DipMgmt, Pht, Gevorg Chilingaryan, DMD, MPH, Katherine Berg, PhD, Bruno Paradis, MD, Barbara Mazer, PhD
923 Electromyographic Activity in the Immobilized Shoulder Girdle Musculature During Scapulothoracic Exercises
Jay Smith, MD, Diane L. Dahm, MD, Kenton R. Kaufman, PhD, Andrea J. Boon, MD, Edward R. Laskowski, MD, Brian R. Kotajarvi, PT, David J. Jacofsky, MD
928 Parental Report of Pain and Associated Limitations in Ambulatory Children With Cerebral Palsy
Raymond C. Tervo, MD, MSc, Frank Symons, PhD, Jean Stout, MS, PT, Tom Novacheck, MD
935 Exercise, Functional Limitations, and Quality of Life: A Longitudinal Study of Persons With Multiple Sclerosis
Alexa K. Stuifbergen, PhD, RN, Shelley A. Blozis, PhD, Tracie C. Harrison, PhD, RN, Heather A. Becker, PhD
944 The Relation Between Walking Capacity and Clinical Correlates in Survivors of Chronic Spinal Poliomyelitis
Sif Gylfadottir, MSc, PT, Marijke Dallimore, PT, Elizabeth Dean, PhD, PT
953 Self-Reported Psychosocial Health Among Adults With Traumatic Brain Injury
Melissa L. McCarthy, ScD, Sureyya S. Dikmen, PhD, Jean A. Langlois, ScD, Anbesaw W. Selassie, DrPH, Ja K. Gu, MSPH, Michael D. Horner, PhD
962 Comparison of the Action Research Arm Test and the Fugl-Meyer Assessment as Measures of Upper-Extremity Motor Weakness After Stroke
Meheroz H. Rabadi, MD, MRCPI, Freny M. Rabadi, BSc
967 The Effect of Environment and Task on Gait Parameters After Stroke: A Randomized Comparison of Measurement Conditions
Susan E. Lord, MSc, Lynn Rochester, PhD, Mark Weatherall, FRACP, Kathryn M. McPherson, PhD, Harry K. McNaughton, PhD
974 Knee Muscle Strength, Gait Performance, and Perceived Participation After Stroke
Ulla-Britt Flansbjer, PT, MSc, David Downham, PhD, Jan Lexell, MD, PhD
981 Influence of Posture and Muscle Length on Stretch Reflex Activity in Poststroke Patients With Spasticity
Judith F. Fleuren, MD, Mark J. Nederhand, MD, PhD, Hermie J. Hermens, PhD
989 Does Having a Computerized Prosthetic Knee Influence Cognitive Performance During Amputee Walking?
Rhonda M. Williams, PhD, Aaron P. Turner, PhD, Michael Orendurff, MS, Ava D. Segal, BAS, Glenn K. Klute, PhD, Jan Pecoraro, RN, Joseph Czerniecki, MD
995 Functional Status and Factors Influencing the Rehabilitation Outcome of People Affected by Above-Knee Amputation and Hemiparesis
Stefano Brunelli, MD, Tiziano Averna, MD, Paolo Porcacchia, MD, Stefano Paolucci, MD, Francesco Di Meo, MD, Marco Traballesi, MD