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Comparative analysis of cost-effectiveness between isosorbide-5-mononitrate and isosorbide: a retrospective
Guimin Zhang1, Xinling Liu1, Jian Xu1
1National Engineering & Technology Research Center of Chirality Pharmaceutical, Linyi, Shandong, China.
Abstract:
Aim: The cost-effectiveness of isosorbide-5-mononitrate (5-ISMN) and isosorbide dinitrate (ISDN) in real-world use in patients with coronary heart disease (CHD; either angina pectoris or myocardial infarction) was retrospectively compared. Method: In this retrospective real-world evaluation, patients with established CHD satisfying the following criteria were selected from information system of two tertiary hospitals in China: with pharmacy claiming for at least one injection of 5-ISMN or ISDN between July 2008 and May 2017; and, CHD patients. By using propensity score matching (PSM), we compared clinical aspects of efficacy, safety, length of hospital stay and cost during hospitalization between 5-ISMN and ISDN group. All data were processed by R statistical package v.2.13.1 (R Foundation for Statistical Computing, Vienna, Austria). Result: Of 5609 patients selected, 4047 received 5-ISMN and 1562 received ISDN. After PSM, we acquired 1555 pairs based on balancing of age, sex, insurance and comorbidities on admission. The frequency (4.2 ± 6.6-times vs 6.5 ± 9.5-times; p < 0.05) and total dosage (47.5 ± 153.4 vs 136.4 ± 261.0 mg; p < 0.05) of sublingual nitroglycerin use decreased and hypotension incidence lowered (8.0 vs 13.0%; p < 0.05) in 5-ISMN group compared with ISDN group. Hospital stay (16.0 ± 11.3 days vs 17.7 ± 13.2; p < 0.05) and hospitalization expenditure ([the ratio of cost in the study to the average hospitalization cost in the city] [odds ratio: 2.5 vs 2.6; p < 0.05]) were reduced in 5-ISMN group as with that of ISDN group. Moreover, the main component of hospitalization cost was medical consumables and medications in both the groups. Conclusion: In the present retrospective real-world evaluation, by using PSM analysis, we found that newer injection agent of 5-ISMN was associated with fewer use of sublingual nitroglycerin, less hypotension incidence, shorter length of hospital stay and less hospitalization expenditure related to its comparator ISDN in patients with established CHD. Further evaluation and clinical experience are need in different circumference for the usage of ISDN.
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