末梢性神経障害性疼痛に対するPregabalinの費用対効果分析

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  • Cost-effectiveness Analysis of Pregabalin for Treatment of Peripheral Neuropathic Pain

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This study aimed to estimate the cost-effectiveness of pregabalin treatment for neuropathic pain.<br>Design:Long-term simulations based on state transition models.<br>Methods:We examined the cost-effectiveness of pregabalin for treatment of three common peripheral neuropathic pains, postherpetic neuralgia(PHN), painful diabetic peripheral neuropathy(DPN), and radiculopathy, using the incremental cost-effectiveness ratio(ICER). We used quality-adjusted life years(QALYs)as an index of effectiveness, and also estimated medical costs. For PHN and DPN, we constructed state transition models comprising two states, with and without pregabalin treatment, and performed 52-week simulations. The pain scores reported in Japanese phaseIII studies were used to set patients' weekly pain scores. The results of utility surveys conducted overseas were used as utility scores, while values randomly sampled from probability distributions were used to set weekly pain scores and drop-out rates. In base-case analyses, we performed 1000 1st-order Monte Carlo simulations using 1000 values randomly sampled from probability distributions, and calculated QALYs and medical costs for 52 weeks for each group. For radiculopathy, the ICER was calculated from changes in QALYs for 12 weeks reported overseas and medical costs estimated separately for the identical period.<br>Results:The ICERs for PHN, DPN, and radiculopathy were 1,116,886 Yen/QALY, 1,100,420 Yen/QALY, and 1,095,943 Yen/QALY, respectively, which were well below the upper limits of ICER ranges for treatments considered cost-effective. There were no cases in which ICERs obtained from scenario and sensitivity analyses differed significantly.<br>Conclusion:Pregabalin was shown to be cost-effective treatment for neuropathic pain.

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  • 薬剤疫学

    薬剤疫学 16 (1), 1-9, 2011

    一般社団法人 日本薬剤疫学会

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