1. A comparison of 4 questionnaires to measure fatigue in postpoliomyelitis syndrome 1 
Herwin L Horemans, MSc, Frans Nollet, MD, PhD, Anita Beelen, PhD, Gustaaf J Lankhorst, MD, PhD 
Archives of Physical Medicine and Rehabilitation 
Volume 85, Issue 3, Pages (March 2004)
DOI: /j.apmr

2. Fig 1
Boxplots of normalized total scores (scale range, 0–100) on the second study visit. The box represents the interquartile range with the bold line as median value. The whiskers represent the range of the scores. Abbreviations: NHPE, NHP energy category; PPLF, PPL fatigue item.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )

3. Fig 2
Bland-Altman plots for the FSS, the PPL fatigue item, and the SFQ. The difference is calculated as the score on the second study visit minus the score on the first study visit. The solid line represents the mean difference. The dotted lines represent the 95% limits of agreement.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )