1. Interobserver reproducibility of the assessment of severity of complaints, grip strength, and pressure pain threshold in patients with lateral epicondylitis 
Nynke Smidt, PhD, Daniëlle A. van der Windt, PhD, Willem J. Assendelft, MD, PhD, Anneke J. Mourits, MSc, Walter L. Devillé, MD, Andrea F. de Winter, PhD, Lex M. Bouter, PhD 
Archives of Physical Medicine and Rehabilitation 
Volume 83, Issue 8, Pages (August 2002)
DOI: /apmr
Copyright © 2002 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

2. Fig. 1
The differences between observers plotted against the mean value of both observers for (A) pain-free grip strength and (B) maximum grip strength (involved arm only) (N = 50). —, mean differences; ---, limits of agreement.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /apmr )
Copyright © 2002 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

3. Fig. 2
The differences between observers plotted against the mean value of both observers for pressure pain threshold (involved arm only) (N = 50). —, mean differences; ---, limits of agreement.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /apmr )
Copyright © 2002 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions