PHYS THER
Vol. 90, No. 2, February 2010, pp. 308-310
DOI: 10.2522/ptj.2010.90.2.308
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On "Motor control exercise for chronic low back pain..." Costa LOP, Maher CG, Latimer J, et al. Phys Ther. 2009;89:1275–1286.


Because this article has no abstract, we have provided an extract of the full text and any section headings.

In the interest of full disclosure, Dr Dennis Hart is a director of Focus on Therapeutic Outcomes, Inc (FOTO), which develops outcome measures and services for physical therapy and rehabilitation.

The work by Costa et al1 represents a step forward in the assessment of treatments that are helpful for patients with lumbar spine impairments. The strength of their study lies in their design, which has been nicely reviewed by Fritz.2

However, we would like to direct attention to a psychometric matter that appears to have been overlooked by Fritz, the editors and reviewers, and the authors. Costa et al used the Patient-Specific Functional Scale (PSFS)3,4 to assess change in "activity" in their sample. Using aggregated PSFS scores to assess change in groups of patients represents a major conceptual and psychometric error, which makes interpretation of results difficult. In the present study, the authors also used the Roland-Morris Disability Questionnaire5 . . . [Full Text of this Article]

Dennis L. Hart and Mark W. Werneke

D.L. Hart, PT, PhD, is Director of Consulting and Research, Focus On Therapeutic Outcomes, Inc, White Stone, Virginia.
M.W. Werneke, PT, MS, DipMDT, is Physical Therapist, CentraState Medical Center Rehabilitation and Spine Center, Freehold, New Jersey.


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L. O.P. Costa, C. G. Maher, J. Latimer, P. W. Hodges, R. D. Herbert, K. M. Refshauge, J. H. McAuley, and M. D. Jennings
Author Response
Physical Therapy, February 1, 2010; 90(2): 310 - 311.
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