Purpose: The purpose of this study was to examine the prognostic value of pretreatment quality of life (QoL) data on locoregional control (LRC), distant metastasis-free survival (DMFS), and overall survival (OS) in patients with nasopharyngeal carcinoma (NPC).
Patients And Methods: A total of 347 new patients with NPC, who were curatively treated by conformal radiotherapy from March 2003 to December 2007, were recruited. The Taiwan Chinese version of the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire C30 was completed before treatment. Multivariate Cox's proportional hazards models were used to analyze the impact of clinical and QoL variables on the treatment results.
Results: The 5-year LRC, DMFS, and OS rates were 72.9%, 79.1%, and 68.4%, respectively. After adjusting the clinical variables, 10 QoL variables were observed to be significantly (P < .05) related to OS, and four QoL variables were related to DMFS. No QoL variable was predictive of LRC. Among the QoL variables that significantly predicted OS and DMFS, physical functioning was the most powerful predictor. A 10-point increase in the physical functioning score was associated with a 23% (95% CI, 12% to 34%) reduction in the likelihood of death and a 22% (95% CI, 9% to 36%) reduction in the likelihood of distant metastasis.
Conclusion: Our findings indicate that pretreatment QoL variables, especially physical functioning, provide easily available prognostic value for distant metastasis and survival in patients with NPC.
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