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Economic evaluations comparing Tran-oral robotic surgery and radiotherapy in oropharyngeal squamous cell carcinoma: A
Krishnakumar Thankappan1, Azhar Jan Battoo2, Sivakumar Vidhyadharan1
1Department of Head and Neck, Amrita Institute of Medical Sciences, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India.
Background:
Trans-oral robotic surgery (TORS) and primary radiotherapy are the two modalities used to treat early T stage oropharyngeal squamous cell carcinoma(OPSCC). Prior literature including a recent randomized controlled trial have not shown the superiority of one modality over the other. When the modalities have similar outcomes, cost-effectiveness have an important role in deciding on the appropriate treatment. There are economic evaluations comparing the two modality with contradicting conclusions. The purpose of this review is to synthesise the evidence.
Methods:
This is a systematic review of economic evaluations on the treatment modalities for OPSCC, namely TORS versus radiotherapy. The main outcome measures were the Cost-utility results reported as the effectiveness and costs separately and as part of the Incremental Cost-Effectiveness Ratio.
Results:
Literature search identified five articles reporting cost-utility analysis, eligible for the review. A strategy is considered to be dominant when the effectiveness achieved was more at a lower cost, compared to the comparator. At the willingness to pay (WTP) threshold of 50,000 to 100,000 USD per Quality Adjusted Life-Year (QALY), three studies showed dominance of strategies in the base case analysis (TORS in two and Primary Chemoradiotherapy in one). Two of the articles studied node negative patients, one of them favored TORS. Three articles had node positive patients and two of them favored TORS and one favored chemoradiotherapy in the base case analysis. On sensitivity analysis, adjuvant treatment was found to be the detrimental factor affecting the cost-effectiveness.
Conclusions:
TORS can be considered a cost-effective strategy in early T stage OPSCC, if the addition of adjuvant therapy involving radiotherapy can be avoided. Literature have shown that around 70% of the early cancers would require adjuvant treatment. This implies the importance of case selection while considering TORS as the initial treatment modality.
