1. Precision of Health-Related Quality-of-Life Data Compared With Other Clinical Measures 
Elizabeth A. Hahn, MA, David Cella, PhD, Olivier Chassany, MD, PhD, Diane L. Fairclough, DrPH, Gilbert Y. Wong, MD, Ron D. Hays, PhD 
Mayo Clinic Proceedings 
Volume 82, Issue 10, Pages (October 2007)
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2. FIGURE 1
Measures of patient outcomes as organized by current models.42,43 FEV1 = forced expiratory volume in 1 second.
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3. FIGURE 2
Proximal vs distal associations of clinical and health-related quality-of-life (HRQL) variables in cystic fibrosis based on a review of the literature.66 Values correspond to correlation coefficients (r), which have been collected using different publications. CT = computed tomography; FEV1 = forced expiratory volume in 1 second; Sao2 = arterial oxygen saturation; MRC = Medical Research Council; QWB = quality of well-being (generic quality-of-life questionnaire); SIP = sickness impact profile (generic quality-of-life questionnaire).
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