1. Isolated Lumbar Extensor Strengthening Versus Regular Physical Therapy in an Army Working Population With Nonacute Low Back Pain: A Randomized Controlled Trial 
Pieter H. Helmhout, MSc, Chris C. Harts, MSc, Wolfgang Viechtbauer, PhD, J. Bart Staal, PhD, Rob A. de Bie, PhD 
Archives of Physical Medicine and Rehabilitation 
Volume 89, Issue 9, Pages (September 2008)
DOI: /j.apmr
Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

2. Fig 1 Flow of participants through the trial.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

3. Fig 2
Means (with point-wisely constructed 95% confidence intervals) of the main outcomes over the course of the study. *RMDQ range, 0–24 (high score indicates greater disability). †PSFS range, 0–300 (high score indicates greater disability). ‡GPE range, 1–7 (high score indicates worsening of complaints).
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions