Cost-effectiveness of Management Strategies for Patients with Recurrent Ovarian Cancer and Inoperable Malignant Bowel Obstruction

OBJECTIVES:Patients with recurrent platinum-resistant ovarian cancer often present with inoperable malignant bowel obstruction (MBO) from a large burden of abdominal disease. Interventions such as total parenteral nutrition (TPN) and chemotherapy may be used in this setting. We aim to describe the relative cost-effectiveness of these interventions to inform clinical decision making.METHODS:Four strategies for management of platinum-resistant recurrent ovarian cancer with inoperable MBO were compared from a societal perspective using a Monte Carlo simulation: (1) hospice, (2) TPN, (3) chemotherapy, and (4) TPN + chemotherapy. Survival, hospitalization rates, end-of-life (EOL) setting, and MBO-related utilities were obtained from literature review: hospice (survival 38 days, 6% hospitalization), chemotherapy (42 days, 29%), TPN (55 days, 25%), TPN + chemotherapy (74 days, 47%). Outcomes were the average cost per strategy and incremental cost-effectiveness ratios (ICERs) in US dollars per quality-adjusted life year (QALY) gained.RESULTS:In the base case scenario, TPN + chemotherapy was the most costly strategy (mean; 95% CI) ($49,741; $49,329-$50,162) and provided the highest QALYs (0.089; 0.089-0.090). The lowest cost strategy was hospice ($14,591; $14,527-$14,654). The TPN alone and chemotherapy alone strategies were dominated by a combination of hospice and TPN + chemotherapy. The ICER of TPN + chemotherapy was $918,538/QALY compared to hospice. With a societal willingness to pay threshold of $150,000/QALY, hospice was the strategy of choice in 71.6% of cases, chemotherapy alone in 28.4%, and TPN-containing strategies in 0%.CONCLUSIONS:TPN with or without chemotherapy is not cost-effective in management of inoperable malignant bowel obstruction and platinum-resistant ovarian cancer.