Abstract
Poly(ADP-ribose) polymerase inhibitor maintenance treatments are available for platinum-sensitive advanced ovarian cancer. Olaparib (O) is available for BRCA mutation patients or in combination with bevacizumab (O+B) for patients with homologous recombination deficiency (HRD+); niraparib (N) is available for all patients. This study aimed to evaluate the cost effectiveness of biomarker testing and maintenance treatments(mTx) with poly(ADP-ribose) polymerase inhibitor in platinum-sensitive advanced ovarian cancer in the USA. Ten strategies were evaluated (S1-S10), representing biomarker testing (none, BRCA or HRD), and mTx (O, O+B, Nor B). PAOLA-1 data were used to build a model estimating progression-free survival (PFS), second PFS (PFS2) and overall survival for O+B. PFS was modelled through mixture cure models; PFS2 and overall survival were modelled by standard parametric models. Hazard ratios of PFS for O+B versus B, N and O were obtained from the literature to estimate PFS for B, N and O. PFS2 and OS for B, N and O were informed by PFS benefits. S2 (no testing, B) had the lowest cost while S10 (HRD testing, O+B for HRD+ and B for HRD-) had the highest quality-adjusted life-years (QALYs). All niraparib strategies were dominated. S2, S4 (BRCA testing, O for BRCA+ and B for BRCA-), S6 (BRCA testing, olaparib plus bevacizumab for BRCA+ and bevacizumab for BRCA-) and S10 were the non-dominated strategies with an incremental cost-effectiveness ratio of $29,095/QALY, $33,786/QALY and $52,948/QALY for S4 versus S2, S6 versus S4 and S10 versus S6, respectively. Homologous recombination deficiency testing followed by O+B for HRD+ and B for HRD- is a highly cost-effective strategy for patients with platinum-sensitive advanced ovarian cancer. A HRD biomarker-guided approach provides most QALYs with good economic value.
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