The Laryngoscope · 2009 · 31 citations · 14 references
These data suggest that patient perception of disability, rather than the extent and severity of disease, influences the majority of head and neck disease-specific QOL indices. Analysis of the effects of comorbidity on post-treatment QOL is limited by increased mortality in patients with advanced comorbidity.
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Importance of Comorbidity in Head and Neck Cancer
Jay F. Piccirillo · The Laryngoscope · 2000 · 400 citations
Differential Prognostic Impact of Comorbidity
William L. Read, Ryan M. Tierney, Nathan Page et al. · Journal of Clinical Oncology · 2004 · 320 citations