TY - JOUR
T1 - Antiplatelet Therapy After Noncardioembolic Stroke
T2 - An Individual Patient Data Network Meta-Analysis
AU - Greving, Jacoba P.
AU - Diener, Hans-Christoph
AU - Reitsma, Johannes B.
AU - Bath, Philip M.
AU - Csiba, Laszlo
AU - Hacke, Werner
AU - Kappelle, L. Jaap
AU - Koudstaal, Peter J.
AU - Leys, Didier
AU - Mas, Jean-Louis
AU - Sacco, Ralph L.
AU - Algra, Ale
N1 - Publisher Copyright:
© 2019 American Heart Association, Inc.
PY - 2019/7
Y1 - 2019/7
N2 - Background and Purpose-We assessed the efficacy and safety of antiplatelet agents after noncardioembolic stroke or transient ischemic attack and examined how these vary according to patients' demographic and clinical characteristics. Methods-We did a network meta-analysis (NMA) of data from 6 randomized trials of the effects of commonly prescribed antiplatelet agents in the long-term (≥3 months) secondary prevention of noncardioembolic stroke or transient ischemic attack. Individual patient data from 43 112 patients were pooled and reanalyzed. Main outcomes were serious vascular events (nonfatal stroke, nonfatal myocardial infarction, or vascular death), major bleeding, and net clinical benefit (serious vascular event or major bleeding). Subgroup analyses were done according to age, sex, ethnicity, hypertension, qualifying diagnosis, type of vessel involved (large versus small vessel disease), and time from qualifying event to randomization. Results-Aspirin/dipyridamole combination (RR
NMA-adj, 0.83; 95% CI, 0.74-0.94) significantly reduced the risk of vascular events compared with aspirin, as did clopidogrel (RR
NMA-adj, 0.88; 95% CI, 0.78-0.98), and aspirin/clopidogrel combination (RR
NMA-adj, 0.83; 95% CI, 0.71-0.96). Clopidogrel caused significantly less major bleeding and intracranial hemorrhage than aspirin, aspirin/dipyridamole combination, and aspirin/clopidogrel combination. Aspirin/clopidogrel combination caused significantly more major bleeding than aspirin, aspirin/dipyridamole combination, and clopidogrel. Net clinical benefit was similar for clopidogrel and aspirin/dipyridamole combination (RR
NMA-adj, 0.99; 95% CI, 0.93-1.05). Subgroup analyses showed no heterogeneity of treatment effectiveness across prespecified subgroups. The excess risk of major bleeding associated with aspirin/clopidogrel combination compared with clopidogrel alone was higher in patients aged <65 years than it was in patients ≥65 years (RR
NMA-adj, 3.9 versus 1.7). Conclusions-Results favor clopidogrel and aspirin/dipyridamole combination for long-term secondary prevention after noncardioembolic stroke or transient ischemic attack, regardless of patient characteristics. Aspirin/clopidogrel combination was associated with a significantly higher risk of major bleeding compared with other antiplatelet regimens.
AB - Background and Purpose-We assessed the efficacy and safety of antiplatelet agents after noncardioembolic stroke or transient ischemic attack and examined how these vary according to patients' demographic and clinical characteristics. Methods-We did a network meta-analysis (NMA) of data from 6 randomized trials of the effects of commonly prescribed antiplatelet agents in the long-term (≥3 months) secondary prevention of noncardioembolic stroke or transient ischemic attack. Individual patient data from 43 112 patients were pooled and reanalyzed. Main outcomes were serious vascular events (nonfatal stroke, nonfatal myocardial infarction, or vascular death), major bleeding, and net clinical benefit (serious vascular event or major bleeding). Subgroup analyses were done according to age, sex, ethnicity, hypertension, qualifying diagnosis, type of vessel involved (large versus small vessel disease), and time from qualifying event to randomization. Results-Aspirin/dipyridamole combination (RR
NMA-adj, 0.83; 95% CI, 0.74-0.94) significantly reduced the risk of vascular events compared with aspirin, as did clopidogrel (RR
NMA-adj, 0.88; 95% CI, 0.78-0.98), and aspirin/clopidogrel combination (RR
NMA-adj, 0.83; 95% CI, 0.71-0.96). Clopidogrel caused significantly less major bleeding and intracranial hemorrhage than aspirin, aspirin/dipyridamole combination, and aspirin/clopidogrel combination. Aspirin/clopidogrel combination caused significantly more major bleeding than aspirin, aspirin/dipyridamole combination, and clopidogrel. Net clinical benefit was similar for clopidogrel and aspirin/dipyridamole combination (RR
NMA-adj, 0.99; 95% CI, 0.93-1.05). Subgroup analyses showed no heterogeneity of treatment effectiveness across prespecified subgroups. The excess risk of major bleeding associated with aspirin/clopidogrel combination compared with clopidogrel alone was higher in patients aged <65 years than it was in patients ≥65 years (RR
NMA-adj, 3.9 versus 1.7). Conclusions-Results favor clopidogrel and aspirin/dipyridamole combination for long-term secondary prevention after noncardioembolic stroke or transient ischemic attack, regardless of patient characteristics. Aspirin/clopidogrel combination was associated with a significantly higher risk of major bleeding compared with other antiplatelet regimens.
KW - antiplatelet agents
KW - efficacy
KW - myocardial infarction
KW - secondary prevention
KW - stroke
UR - http://www.scopus.com/inward/record.url?scp=85068808314&partnerID=8YFLogxK
U2 - 10.1161/STROKEAHA.118.024497
DO - 10.1161/STROKEAHA.118.024497
M3 - Article
C2 - 31177983
SN - 0039-2499
VL - 50
SP - 1812
EP - 1818
JO - Stroke
JF - Stroke
IS - 7
ER -