Patient Preference-Based Comparative Effectiveness and Cost-Utility Analysis of the Prostamides for Open-Angle Glaucoma.

PURPOSE: To perform patient preference-based comparative effectiveness and cost-utility (cost-effectiveness) analyses to evaluate topical bimatoprost 0.01%, latanoprost 0.005%, travoprost 0.004%, tafluprost 0.0015%, and timolol 0.5% for the treatment of open-angle glaucoma (OAG).

METHODS

Value-Based Medicine®, incremental cost-utility analysis, and average cost-utility analysis were performed using published systematic review and network meta-analyses with 3-month clinical data for a base case of OAG with an untreated intraocular pressure of 26 mm Hg. Visual acuity and visual field changes were converted to time tradeoff utility format. A 20-year model was undertaken; bilateral therapy was presumed; a national average Medicare Fee Schedule was used; and ophthalmic, third party insurer, and societal cost perspectives were utilized. Patient value outcomes (QALYs or quality-adjusted life-years) and costs were discounted at 3% annually.

RESULTS

Bimatoprost conferred a mean 2.56 QALY gain (22.9% patient quality-of-life gain) for the average OAG patient, while latanoprost for the average OAG patient, while latanoprost conferred a 2.00 QALY gain (17.8% quality-of-life gain), tafluprost a 1.99 QALY gain (17.9% quality-of-life gain), travoprost a l.92 QALY gain (17.2% quality-of-life gain), and timolol a 1.42 QALY gain (12.8% quality-of-life gain). The ophthalmic cost-perspective, incremental cost-utility ratio of bimatoprost referent to travoprost was $6,034/QALY, to latanoprost was $27,973/QALY, and to timolol was $16,063/QALY. Bimatoprost dominated tafluprost, meaning that it conferred greater patient value for lesser cost than tafluprost.

CONCLUSIONS

Topical bimatoprost delivers greater patient value than the other prostamides and topical timolol for the treatment of OAG. Bimatoprost is incrementally cost-effective referent to the other prostamides and timolol.