Speech and voice outcomes in oropharyngeal cancer and evaluation of the University of Washington Quality of Life speech domain

Background:  Radical treatment of oropharyngeal cancer can have significant impact on speech & voice outcomes. Aims:  (i) To assess the extent of speech & voice handicap in disease-free survivors of oropharyngeal squamous cell cancer. (ii) To assess the validity of the speech domain of UWQOL as a screening tool. (iii) To identify clinical characteristics associated with worse speech/voice outcome. Design:  Cross-sectional survey. Setting:  University Hospital Aintree, a university teaching hospital and tertiary referral centre. Patients:  All who were treated for oropharyngeal cancer between 1 January 1999 and 31 May 2005, were alive, disease free and willing to participate. Interventions:  Three patient-based questionnaires: University of Washington Quality of Life (UWQOL), voice handicap index (VHI) and voice related quality of life (VRQOL). Three expert-based assessments: GRBAS rating, speech intelligibility and dysarthria rating. Results:  Sixty-six per cent of patients participated. Median VHI score (29) & VRQOL score (15) imply mild to moderate voice impairment. 20% of patients had severe handicap (VHI score > 60). Forty-eight per cent had normal voice ratings. Speech was normal in 26%, mildly impaired in 62% and significantly impaired in 12% patients (UWQOL). Correlation between UW-QOL speech domain with speech intelligibility rating was 0.52 (P < 0.001). There were clear demarcations between UW-QOL scores of 30, 70 and 100 on the voice questionnaires. Adverse speech and voice function were associated with tumour stage, radiotherapy (RT) & free-flap surgery. Conclusions:  Voice & speech impairment is prevalent in > 70% of oropharyngeal cancer patients. There is moderate correlation between UWQOL speech domain and speech intelligibility assessment & voice tools making it a quick and easy screening instrument. The main clinical correlates associated with adverse patient and observer rated speech and voice outcomes were tumour stage, RT and free-flap reconstruction.