The ABCD-GENE score was constructed to identify patients with high platelet reactivity (HPR) after 30 days of clopidogrel treatment. In our study, 1297 eligible patients with acute coronary syndrome (ACS) were included, and 44 (3.4%) major adverse cardiovascular events (MACEs) occurred during the 12-month clopidogrel treatment. The score with a cutoff of ≥ 10 was independently associated with the risk of 5-day HPR (adjusted HR: 1.73, 95% CI: 1.09-2.74, P = 0.020) and MACEs (adjusted HR: 2.25, 95% CI: 1.19-4.25, P = 0.013). The risk of MACEs increased when the multivariable model with the score (≥ 10) plus 5-day HPR was used (adjusted HR: 4.37, 95% CI: 1.90-10.10, P = 0.001). The c-statistic for MACEs was 0.60 when using the score threshold of ≥ 10 and 0.63 when using the model with the score plus 5-day HPR. As a simple tool, the ABCD-GENE score could identify clopidogrel-treated Chinese patients with ACS who are at increased risk of MACEs. The addition of 5-day HPR could slightly improve the diagnostic ability of the score.
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