Real-world treatment patterns, cost of care and effectiveness of therapies for patients with squamous cell carcinoma of head and neck pre and post approval of immuno-oncology agents

AbstractAims:In 2016, nivolumab and pembrolizumab were approved for the treatment of squamous cell carcinoma of the head and neck (SCCHN) following progression after initial platinum-based therapy. We sought to explore the uptake, effectiveness, and impact on healthcare resource utilization (HRU) and total costs of care pre and post introduction of immuno-oncology (IO) agents.Materials and Methods:Recurrent/metastatic SCCHN patients were identified from a healthcare claims clearinghouse by selecting patients with a claim for distant metastases or who initiated systemic therapy at least 120 days following discontinuation of platinum-based therapy. Two cohorts were created according to the date of post-platinum therapy (PPT) initiation: pre-IO = 08/01/2014-07/31/2015; post-IO = 08/01/2016-07/31/2017. Treatment patterns and effectiveness (duration of treatment, time to next treatment) during first-line (1 L) PPT, HRU, and costs were compared between propensity-score matched patients from each cohort.Results:Of 716 patients identified (pre-IO = 265, post-IO = 451) 46.3% of post-IO patients received IO post-platinum. In 229 matched patients 20.0% of the post-IO compared to 10.7% of the pre-IO (p=.02) had at least a 6 month duration of 1 L PPT. Inpatient admissions during 1 L PPT: 34.1% post-IO versus 48.0% pre-IO (p= <.01). PPPM total costs of care in 1 L PPT were significantly greater post-IO ($11,535) compared to pre-IO ($9,054, p=.002). Time to next treatment (from 1 L PPT start) was 6.1 months pre-IO versus 7.4 months post-IO (p=.046).Limitations:Recurrent SCCHN patients were identified using a validated claims-based algorithm but misclassification may occur. Requiring patients to have received 1 L PPT the pre-IO cohort may be systematically different that the post-IO cohort as pre-IO patients were more likely to have not received further treatment beyond 1 L PPT.Conclusions:The significant uptake of IO therapy resulted in longer durations of therapy, lower rates of hospitalizations although higher treatment costs. The results suggest IO treatment provides additional clinical benefits to recurrent/metastatic SCCHN patients.