Original Article Long-term Outcomes of Drug-eluting versus Bare-metal stent for ST-elevation Myocardial Infarction Liping Wang, Hongyun Wang, Pingshuan Dong, Zhuanzhen Li, Yanyu Wang, Nana Duan, Yuwei Zhao, Shaoxin Wang Department of Cardiology, the First Affiliated Hospital, Henan University of Science and Technology, Luoyang City, China
Abstract Background: Long-term outcomes of drug-eluting stents (DES) versus bare-metal stents (BMS) in patients with ST-segment elevation myocardial infarction (STEMI) remain uncertain. Objective: To investigate long-term outcomes of drug-eluting stents (DES) versus bare-metal stents (BMS) in patients with ST-segment elevation myocardial infarction (STEMI). Methods: We performed search of MEDLINE, EMBASE, the Cochrane library, and ISI Web of Science (until February 2013) for randomized trials comparing more than 12-month efficacy or safety of DES with BMS in patients with STEMI. Pooled estimate was presented with risk ratio (RR) and its 95% confidence interval (CI) using random-effects model. Results: Ten trials with 7,592 participants with STEMI were included. The overall results showed that there was no significant difference in the incidence of all-cause death and definite/probable stent thrombosis between DES and BMS at long-term follow-up. Patients receiving DES implantation appeared to have a lower 1-year incidence of recurrent myocardial infarction than those receiving BMS (RR = 0.75, 95% CI 0.56 to 1.00, p= 0.05). Moreover, the risk of target vessel revascularization (TVR) after receiving DES was consistently lowered during long-term observation (all p< 0.01). In subgroup analysis, the use of everolimus-eluting stents (EES) was associated with reduced risk of stent thrombosis in STEMI patients (RR = 0.37, p=0.02). Conclusions: DES did not increase the risk of stent thrombosis in patients with STEMI compared with BMS. Moreover, the use of DES did lower long-term risk of repeat revascularization and might decrease the occurrence of reinfarction. (Arq Bras Cardiol. 2014; 102(6):529-538) Keywords: Drug-eluting stents; Bare-metal stents; Acute myocardial infarction; Long-term outcomes; Meta-analysis.
Introduction The use of bare-metal stents (BMS) has showed the benefit in reducing the risk of reocclusion of the ischemia‑related artery and the need for repeat revascularization in ST‑segment elevation myocardial infarction (STEMI) as compared with balloon angioplasty1. However, more than 20% subjects with STEMI who received BMS implantation during primary percutaneous coronary intervention suffered from in-stent restenosis2. Currently, drug-eluting stents (DES) are increasingly used for treatment of STEMI and remedy the above drawback of BMS3,4. However, concerns have arisen regarding a potentially higher risk of stent thrombosis with DES related to the reduced endothelialization and healing5, especially in the setting of
Mailing Address: Shaoxin Wang • Department of Cardiology, The First Affiliated Hospital, Henan University of Science and Technology - Jinghua Road No.24, Luoyang city 471003, China. Email: [email protected] Manuscript received November 6, 2013; revised January 20, 2014; accepted February 6, 2014
DOI: 10.5935/abc.20140070
529
STEMI patients with the higher possible thrombotic coronary lesions6. The long-term follow-up of several pivotal studies showed an increased risk of stent thrombosis associated with DES implantation in STEMI subjects compared with BMS7,8, but this result has not been confirmed by other studies3,9. Current clinical evidence based on registry studies and randomized controlled trials (RCTs) focusing on this issue delivering conflicting results. These inconsistent findings confused interventional cardiologists’ stent selection decisions in these specific subjects. Initial meta‑analyses showed the efficacy and safety of DES placement at short-term follow-up in the setting of STEMI10,11, with no safety issues. However, the longer-term treatment effect of stent implantation on these high-risk patients remains uncertain. Therefore, here we performed a meta-analysis on basis of the available data from RCTs to elucidate the long-term clinical outcomes of DES versus BMS in patients with STEMI.
Methods Eligible criteria A study was included if 1) patients with STEMI were randomly assigned to DES (everolimus- [EES], zotarolimus-, sirolimu- [SES], or paclitaxe-eluting stent [PES]) versus BMS; 2) the data on
Wang et al. A meta-analysis of DES for STEMI
Original Article efficacy or safety endpoints was available; 3) follow-up duration was no less than 12 months. We restricted our analyses to the DES approved by the US Food and Drug Administration (FDA). Trials would be excluded if the data on patient or procedural characteristics was not available, and post-hoc analyses of RCTs were also excluded. Study identification We systematically searched MEDLINE, EMBASE, the Cochrane library, and ISI Web of Science for the eligible trials (until July 2013) using the following terms: everolimus‑eluting stent, zotarolimus-eluting stent, drug‑eluting stent, sirolimus‑eluting stent, paclitaxel-eluting stent, bare‑metal stent, uncoated stent, ST-segment elevation myocardial infarction, ST-segment elevation acute coronary syndrome. We checked the reference lists of review articles, meta‑analyses, and original studies identified by the electronic searches to find other eligible trials. The search was restricted to English‑language literature. Study enrollment, data collection, and quality assessment Two investigators independently assessed trial eligibility using predefined eligibility criteria. The data, such as participant characteristics, lesion and procedural characteristics, and follow-up duration, were extracted. The information on clinical outcomes (e.g. all-cause death, recurrent myocardial infarction, target vessel revascularization [TVR], or definite/probable stent thrombosis) was also recorded independently. Any disagreements were resolved through consensus. The quality of the trials was assessed according to concealment of treatment allocation; blinding of patients, investigators, or clinical outcome assessors; and the proportion of patients with complete clinical follow-up12. Additionally, a numerical score between 0 and 5 was assigned as a measure of study design and reporting quality based on Jadad scale13. Statistical analyses The pooling analyses were performed using Review Manager 5.1 software (Cochrane Collaboration, Copenhagen, Denmark). We pooled treatment effects and calculated risk ratios (RRs) with 95% confidence intervals (CI) for all end points by using random-effects model. Statistical homogeneity was quantified with the I2 statistic with a scale of 0% to 100% (>75% represented very large between-study inconsistency)14. Subgroup analysis was performed to test the potential influence of clinical factors including the type of DES, time from pain to angioplasty, dual antiplatelet therapy duration, and the percentage of use of glycoprotein IIb/IIIa inhibitors. Overall estimates in subgroup analyses were calculated based on the longest observations when a trial reported follow-up findings at different time points. For verification of the robustness of the results, sensitivity analyses were conducted by omitting each trial at a time from analysis and then calculating overall estimates for the remaining studies. Publication bias among the enrolled studies was qualitatively assessed using funnel plot method. The significance level was set at p4-year: RR = 0.83, p= 0.28, I2= 0%; Figure 2) and definite/probable stent thrombosis (1-year: RR = 0.79, p= 0.15, I2= 0%; 2-year: RR = 0.91, p= 0.79, I2= 0%; 3-year: RR = 1.25, p= 0.33, I2= 0%; >4-year: RR = 1.00, p= 0.99, I2= 0%; Figure 3) between DES and BMS regardless of follow-up duration in patients with STEMI. Moreover, DES seemed likely to reduce the 1-year occurrence of recurrent myocardial infarction (RR = 0.75, 95% CI 0.56 to 1.00, p= 0.05, I2= 0%; Figure 4). However, the superiority of DES became nonsignificant with the prolongation of observation period (all p > 0.10; Figure 4). Notably, the risk of TVR in STEMI patients receiving DES placement was dramatically lowered compared with that receiving BMS during 1-year to 3-year follow-up (1-year follow-up: RR = 0.47, 95% CI 0.37 to 0.61, p< 0.001, I2= 30%; 2-year: RR = 0.42, 95% CI 0.25 to 0.70, p< 0.001, I2= 37%; 3-year: RR = 0.53, 95% CI 0.39 to 0.72, p< 0.001, I2= 0%), and the favorable effect of DES remained almost constant up to the maximum observed follow-up of more than 4 years (RR = 0.57, 95% CI 0.42 to 0.76, p< 0.001, I2= 0%; Figure 5). In subgroup analyses, the second-generation DES, EES, might provide a benefit in lowering the risk of stent thrombosis in STEMI patients (RR = 0.37, 95% CI 0.15 to 0.87, p=0.02, Table 2), whereas both the first-generation SES and PES did not show the benefit compared with BMS (both p > 0.1, Table 2). Except for this, there were no significant influences of several important clinical factors, such as the type of DES, time from symptom to angioplasty, dual antiplatelet therapy duration,
Arq Bras Cardiol. 2014; 102(6):529-538
530
Wang et al. A meta-analysis of DES for STEMI
Original Article
Records identified through MEDLINE, EMBASE,
Additional records identified
Cochrane, web of science database searching
through references lists
(n = 2465)
(n = 0)
Records after duplicates removed (n = 1256)
Records screened
Records excluded
(n = 1256)
(n = 1181)
Full-text articles assessed for elegilibilty
Full-text articles excluded (n = 60)
(n = 75)
31 non-RTCs 15 various DES comparisons 2 no data on clinical characteristics
Articles included in quantitative
Follow-up < 12 months
synthesis (meta-analysis) (n = 15 including 10 trials)
Figure 1 – Flowchart of selection of studies for inclusion in meta-analysis. DES: drug-eluting stents; RCTs: randomized controlled trials
and the percentage of use of glycoprotein IIb/IIIa inhibitors, on the beneficial effect of DES in TVR, with statistically significant differences (all p 3h
6133
0.54 [0.44, 0.67]
< 0.001
0.90 [0.63, 1.28]
0.55
DAPT duration ≤ 6 m
2450
0.51 [0.39, 0.67]
< 0.001
1.11 [0.77, 1.60]
0.56
DAPT duration > 6 m
5127
0.60 [0.49, 0.75]
< 0.001
0.81 [0.49, 1.33]
0.40
Use of GP IIb/IIIa inhibitors ≥ 90%
1491
0.43 [0.32, 0.58]
< 0.001
1.13 [0.71, 1.80]
0.61
Use of GP IIb/IIIa inhibitors < 90%
6086
0.62 [0.52, 0.74]
< 0.001
0.89 [0.63, 1.27]
0.52
CI: confidence interval; DAPT: dual antiplatelet therapy; EES: everolimus-eluting stents; GP: glycoprotein; PES: paclitaxel-eluting stents; RR: risk ratios; SES: sirolimus-eluting stents; TVR: target vessel revascularization.
Author contributions Conception and design of the research: Wang S; Acquisition of data: Wang L, Wang H; Analysis and interpretation of the data: Wang L, Wang H, Li Z, Wang Y; Obtaining financing: Dong P; Writing of the manuscript: Wang L, Wang H, Wang Y; Critical revision of the manuscript for intellectual content: Dong P, Duan N, Zhao Y, Wang S.
Potential Conflict of Interest No potential conflict of interest relevant to this article was reported. Sources of Funding There were no external funding sources for this study. Study Association This study is not associated with any thesis or dissertation work.
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18. Leibundgut G, Nietlispach F, Pittl U, Brunner-La Rocca H, Kaiser CA, Pfisterer ME. Stent thrombosis up to 3 years after stenting for ST-segment elevation myocardial infarction versus for stable angina--comparison of the effects of drug-eluting versus bare-metal stents. Am Heart J. 2009;158(2):271-6.
31. Sheiban I, Chiribiri A, Galli S, Biondi-Zoccai G, Montorsi P, Beninati S, et al. Sirolimus-eluting stent implantation for bare-metal in-stent restenosis: is there any evidence for a late catch-up phenomenon? J Cardiovasc Med (Hagerstown). 2008;9(8):783-8.
19. Menichelli M, Parma A, Pucci E, Fiorilli R, De Felice F, Nazzaro M, et al. Randomized trial of Sirolimus-Eluting Stent Versus Bare-Metal Stent in Acute Myocardial Infarction (SESAMI). J Am Coll Cardiol. 2007;49(19):1924-30.
32. Awata M, Kotani J, Uematsu M, Morozumi T, Watanabe T, Onishi T, et al. Serial angioscopic evidence of incomplete neointimal coverage after sirolimus-eluting stent implantation: comparison with bare-metal stents. Circulation. 2007;116(8):910-6.
20. Spaulding C, Henry P, Teiger E, Beatt K, Bramucci E, Carrie D, et al; TYPHOON Investigators. Sirolimus-eluting versus uncoated stents in acute myocardial infarction. N Engl J Med. 2006;355(11):1093-104. 21. Spaulding C, Teiger E, Commeau P, Varenne O, Bramucci E, Slama M, et al. Four-year follow-up of TYPHOON (trial to assess the use of the CYPHer sirolimus-eluting coronary stent in acute myocardial infarction treated with BallOON angioplasty). JACC Cardiovasc Interv. 2011;4(1):14-23. 22. Stone GW, Lansky AJ, Pocock SJ, Gersh BJ, Dangas G, Wong SC, et al; HORIZONS-AMI Trial Investigators. Paclitaxel-eluting stents versus bare-metal stents in acute myocardial infarction. N Engl J Med. 2009;360(19):1946-59. 23. Tebaldi M, Arcozzi C, Campo G, Percoco G, Ferrari R, Valgimigli M; STRATEGY Investigators. The 5-year clinical outcomes after a randomized comparison of sirolimus-eluting versus bare-metal stent implantation in patients with ST-segment elevation myocardial infarction. J Am Coll Cardiol. 2009;54(20):1900-1. 24. Valgimigli M, Campo G, Arcozzi C, Malagutti P, Carletti R, Ferrari F, et al. Two-year clinical follow-up after sirolimus-eluting versus bare-metal stent implantation assisted by systematic glycoprotein IIb/IIIa Inhibitor Infusion in patients with myocardial infarction: results from the STRATEGY study. J Am Coll Cardiol. 2007;50(2):138-45. 25. Valgimigli M, Campo G, Gambetti S, Bolognese L, Ribichini F, Colangelo S, et al; MULTIcentre evaluation of Single high-dose bolus TiRofiban versus Abciximab with sirolimus eluting sTEnt or Bare Metal Stent in Acute Myocardial Infarction studY Investigators. Three-year follow-up
33. Sousa JE, Costa MA, Abizaid A, Feres F, Seixas AC, Tanajura LF, et al. Four-year angiographic and intravascular ultrasound follow-up of patients treated with sirolimus-eluting stents. Circulation. 2005;111(18):2326-9. 34. Garg S, Serruys P, Onuma Y, Dorange C, Veldhof S, Miquel-Hebert K, et al; SPIRIT II Investigators. 3-year clinical follow-up of the XIENCE V everolimus-eluting coronary stent system in the treatment of patients with de novo coronary artery lesions: the SPIRIT II trial (Clinical Evaluation of the Xience V Everolimus Eluting Coronary Stent System in the Treatment of Patients with de novo Native Coronary Artery Lesions). JACC Cardiovasc Interv. 2009;2(12):1190-8. 35. Stone GW, Moses JW, Ellis SG, Schofer J, Dawkins KD, Morice MC, et al. Safety and efficacy of sirolimus- and paclitaxel-eluting coronary stents. N Engl J Med. 2007;356(10):998-1008. 36. de la Torre-Hernandez JM, Alfonso F, Hernandez F, Elizaga J, Sanmartin M, Pinar E, et al; ESTROFA Study Group. Drug-eluting stent thrombosis: results from the multicenter Spanish registry ESTROFA (Estudio ESpanol sobre TROmbosis de stents FArmacoactivos). J Am Coll Cardiol. 2008;51(10):986-90. 37. Greenhalgh J, Hockenhull J, Rao N, Dundar Y, Dickson RC, Bagust A. Drug-eluting stents versus bare metal stents for angina or acute coronary syndromes. Cochrane Database Syst Rev. 2010 May 12;(5):CD004587. 38. Palmerini T, Biondi-Zoccai G, Della Riva D, Stettler C, Sangiorgi D, D’Ascenzo F, et al. Stent thrombosis with drug-eluting and bare-metal stents: evidence from a comprehensive network meta-analysis. Lancet. 2012; 379(9824):1393-402.
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Abstract Background: Long-term outcomes of drug-eluting stents (DES) versus bare-metal stents (BMS) in patients with ST-segment elevation myocardial infarction (STEMI) remain uncertain. Objective: To investigate long-term outcomes of drug-eluting stents (DES) versus bare-metal stents (BMS) in patients with ST-segment elevation myocardial infarction (STEMI). Methods: We performed search of MEDLINE, EMBASE, the Cochrane library, and ISI Web of Science (until February 2013) for randomized trials comparing more than 12-month efficacy or safety of DES with BMS in patients with STEMI. Pooled estimate was presented with risk ratio (RR) and its 95% confidence interval (CI) using random-effects model. Results: Ten trials with 7,592 participants with STEMI were included. The overall results showed that there was no significant difference in the incidence of all-cause death and definite/probable stent thrombosis between DES and BMS at long-term follow-up. Patients receiving DES implantation appeared to have a lower 1-year incidence of recurrent myocardial infarction than those receiving BMS (RR = 0.75, 95% CI 0.56 to 1.00, p= 0.05). Moreover, the risk of target vessel revascularization (TVR) after receiving DES was consistently lowered during long-term observation (all p< 0.01). In subgroup analysis, the use of everolimus-eluting stents (EES) was associated with reduced risk of stent thrombosis in STEMI patients (RR = 0.37, p=0.02). Conclusions: DES did not increase the risk of stent thrombosis in patients with STEMI compared with BMS. Moreover, the use of DES did lower long-term risk of repeat revascularization and might decrease the occurrence of reinfarction. (Arq Bras Cardiol. 2014; 102(6):529-538) Keywords: Drug-eluting stents; Bare-metal stents; Acute myocardial infarction; Long-term outcomes; Meta-analysis.
Introduction The use of bare-metal stents (BMS) has showed the benefit in reducing the risk of reocclusion of the ischemia‑related artery and the need for repeat revascularization in ST‑segment elevation myocardial infarction (STEMI) as compared with balloon angioplasty1. However, more than 20% subjects with STEMI who received BMS implantation during primary percutaneous coronary intervention suffered from in-stent restenosis2. Currently, drug-eluting stents (DES) are increasingly used for treatment of STEMI and remedy the above drawback of BMS3,4. However, concerns have arisen regarding a potentially higher risk of stent thrombosis with DES related to the reduced endothelialization and healing5, especially in the setting of
Mailing Address: Shaoxin Wang • Department of Cardiology, The First Affiliated Hospital, Henan University of Science and Technology - Jinghua Road No.24, Luoyang city 471003, China. Email: [email protected] Manuscript received November 6, 2013; revised January 20, 2014; accepted February 6, 2014
DOI: 10.5935/abc.20140070
529
STEMI patients with the higher possible thrombotic coronary lesions6. The long-term follow-up of several pivotal studies showed an increased risk of stent thrombosis associated with DES implantation in STEMI subjects compared with BMS7,8, but this result has not been confirmed by other studies3,9. Current clinical evidence based on registry studies and randomized controlled trials (RCTs) focusing on this issue delivering conflicting results. These inconsistent findings confused interventional cardiologists’ stent selection decisions in these specific subjects. Initial meta‑analyses showed the efficacy and safety of DES placement at short-term follow-up in the setting of STEMI10,11, with no safety issues. However, the longer-term treatment effect of stent implantation on these high-risk patients remains uncertain. Therefore, here we performed a meta-analysis on basis of the available data from RCTs to elucidate the long-term clinical outcomes of DES versus BMS in patients with STEMI.
Methods Eligible criteria A study was included if 1) patients with STEMI were randomly assigned to DES (everolimus- [EES], zotarolimus-, sirolimu- [SES], or paclitaxe-eluting stent [PES]) versus BMS; 2) the data on
Wang et al. A meta-analysis of DES for STEMI
Original Article efficacy or safety endpoints was available; 3) follow-up duration was no less than 12 months. We restricted our analyses to the DES approved by the US Food and Drug Administration (FDA). Trials would be excluded if the data on patient or procedural characteristics was not available, and post-hoc analyses of RCTs were also excluded. Study identification We systematically searched MEDLINE, EMBASE, the Cochrane library, and ISI Web of Science for the eligible trials (until July 2013) using the following terms: everolimus‑eluting stent, zotarolimus-eluting stent, drug‑eluting stent, sirolimus‑eluting stent, paclitaxel-eluting stent, bare‑metal stent, uncoated stent, ST-segment elevation myocardial infarction, ST-segment elevation acute coronary syndrome. We checked the reference lists of review articles, meta‑analyses, and original studies identified by the electronic searches to find other eligible trials. The search was restricted to English‑language literature. Study enrollment, data collection, and quality assessment Two investigators independently assessed trial eligibility using predefined eligibility criteria. The data, such as participant characteristics, lesion and procedural characteristics, and follow-up duration, were extracted. The information on clinical outcomes (e.g. all-cause death, recurrent myocardial infarction, target vessel revascularization [TVR], or definite/probable stent thrombosis) was also recorded independently. Any disagreements were resolved through consensus. The quality of the trials was assessed according to concealment of treatment allocation; blinding of patients, investigators, or clinical outcome assessors; and the proportion of patients with complete clinical follow-up12. Additionally, a numerical score between 0 and 5 was assigned as a measure of study design and reporting quality based on Jadad scale13. Statistical analyses The pooling analyses were performed using Review Manager 5.1 software (Cochrane Collaboration, Copenhagen, Denmark). We pooled treatment effects and calculated risk ratios (RRs) with 95% confidence intervals (CI) for all end points by using random-effects model. Statistical homogeneity was quantified with the I2 statistic with a scale of 0% to 100% (>75% represented very large between-study inconsistency)14. Subgroup analysis was performed to test the potential influence of clinical factors including the type of DES, time from pain to angioplasty, dual antiplatelet therapy duration, and the percentage of use of glycoprotein IIb/IIIa inhibitors. Overall estimates in subgroup analyses were calculated based on the longest observations when a trial reported follow-up findings at different time points. For verification of the robustness of the results, sensitivity analyses were conducted by omitting each trial at a time from analysis and then calculating overall estimates for the remaining studies. Publication bias among the enrolled studies was qualitatively assessed using funnel plot method. The significance level was set at p4-year: RR = 0.83, p= 0.28, I2= 0%; Figure 2) and definite/probable stent thrombosis (1-year: RR = 0.79, p= 0.15, I2= 0%; 2-year: RR = 0.91, p= 0.79, I2= 0%; 3-year: RR = 1.25, p= 0.33, I2= 0%; >4-year: RR = 1.00, p= 0.99, I2= 0%; Figure 3) between DES and BMS regardless of follow-up duration in patients with STEMI. Moreover, DES seemed likely to reduce the 1-year occurrence of recurrent myocardial infarction (RR = 0.75, 95% CI 0.56 to 1.00, p= 0.05, I2= 0%; Figure 4). However, the superiority of DES became nonsignificant with the prolongation of observation period (all p > 0.10; Figure 4). Notably, the risk of TVR in STEMI patients receiving DES placement was dramatically lowered compared with that receiving BMS during 1-year to 3-year follow-up (1-year follow-up: RR = 0.47, 95% CI 0.37 to 0.61, p< 0.001, I2= 30%; 2-year: RR = 0.42, 95% CI 0.25 to 0.70, p< 0.001, I2= 37%; 3-year: RR = 0.53, 95% CI 0.39 to 0.72, p< 0.001, I2= 0%), and the favorable effect of DES remained almost constant up to the maximum observed follow-up of more than 4 years (RR = 0.57, 95% CI 0.42 to 0.76, p< 0.001, I2= 0%; Figure 5). In subgroup analyses, the second-generation DES, EES, might provide a benefit in lowering the risk of stent thrombosis in STEMI patients (RR = 0.37, 95% CI 0.15 to 0.87, p=0.02, Table 2), whereas both the first-generation SES and PES did not show the benefit compared with BMS (both p > 0.1, Table 2). Except for this, there were no significant influences of several important clinical factors, such as the type of DES, time from symptom to angioplasty, dual antiplatelet therapy duration,
Arq Bras Cardiol. 2014; 102(6):529-538
530
Wang et al. A meta-analysis of DES for STEMI
Original Article
Records identified through MEDLINE, EMBASE,
Additional records identified
Cochrane, web of science database searching
through references lists
(n = 2465)
(n = 0)
Records after duplicates removed (n = 1256)
Records screened
Records excluded
(n = 1256)
(n = 1181)
Full-text articles assessed for elegilibilty
Full-text articles excluded (n = 60)
(n = 75)
31 non-RTCs 15 various DES comparisons 2 no data on clinical characteristics
Articles included in quantitative
Follow-up < 12 months
synthesis (meta-analysis) (n = 15 including 10 trials)
Figure 1 – Flowchart of selection of studies for inclusion in meta-analysis. DES: drug-eluting stents; RCTs: randomized controlled trials
and the percentage of use of glycoprotein IIb/IIIa inhibitors, on the beneficial effect of DES in TVR, with statistically significant differences (all p 3h
6133
0.54 [0.44, 0.67]
< 0.001
0.90 [0.63, 1.28]
0.55
DAPT duration ≤ 6 m
2450
0.51 [0.39, 0.67]
< 0.001
1.11 [0.77, 1.60]
0.56
DAPT duration > 6 m
5127
0.60 [0.49, 0.75]
< 0.001
0.81 [0.49, 1.33]
0.40
Use of GP IIb/IIIa inhibitors ≥ 90%
1491
0.43 [0.32, 0.58]
< 0.001
1.13 [0.71, 1.80]
0.61
Use of GP IIb/IIIa inhibitors < 90%
6086
0.62 [0.52, 0.74]
< 0.001
0.89 [0.63, 1.27]
0.52
CI: confidence interval; DAPT: dual antiplatelet therapy; EES: everolimus-eluting stents; GP: glycoprotein; PES: paclitaxel-eluting stents; RR: risk ratios; SES: sirolimus-eluting stents; TVR: target vessel revascularization.
Author contributions Conception and design of the research: Wang S; Acquisition of data: Wang L, Wang H; Analysis and interpretation of the data: Wang L, Wang H, Li Z, Wang Y; Obtaining financing: Dong P; Writing of the manuscript: Wang L, Wang H, Wang Y; Critical revision of the manuscript for intellectual content: Dong P, Duan N, Zhao Y, Wang S.
Potential Conflict of Interest No potential conflict of interest relevant to this article was reported. Sources of Funding There were no external funding sources for this study. Study Association This study is not associated with any thesis or dissertation work.
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