Genetic variants at chromosome 9p21 and risk of first versus subsequent coronary heart disease events:a systematic review and meta-analysis

Patel, Riyaz S. and Asselbergs, Folkert W. and Quyyumi, Arshed A. and Palmer, Tom M. and Finan, Chris I. and Tragante, Vinicius and Deanfield, John and Hemingway, Harry and Hingorani, Aroon D. and Holmes, Michael V. (2014) Genetic variants at chromosome 9p21 and risk of first versus subsequent coronary heart disease events:a systematic review and meta-analysis. Journal of the American College of Cardiology, 63 (21). pp. 2234-2245. ISSN 1558-3597

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Abstract

OBJECTIVES: The purpose of this analysis was to compare the association between variants at the chromosome 9p21 locus (Ch9p21) and risk of first versus subsequent coronary heart disease (CHD) events through systematic review and meta-analysis. BACKGROUND: Ch9p21 is a recognized risk factor for a first CHD event. However, its association with risk of subsequent events in patients with established CHD is less clear. METHODS: We searched PubMed and EMBASE for prospective studies reporting association of Ch9p21 with incident CHD events and extracted information on cohort type (individuals without prior CHD or individuals with established CHD) and effect estimates for risk of events. RESULTS: We identified 31 cohorts reporting on 193,372 individuals. Among the 16 cohorts of individuals without prior CHD (n = 168,209), there were 15,664 first CHD events. Ch9p21 was associated with a pooled hazard ratio (HR) of a first event of 1.19 (95% confidence interval: 1.17 to 1.22) per risk allele. In individuals with established CHD (n = 25,163), there were 4,436 subsequent events providing >99% and 91% power to detect a per-allele HR of 1.19 or 1.10, respectively. The pooled HR for subsequent events was 1.01 (95% confidence interval: 0.97 to 1.06) per risk allele. There was strong evidence of heterogeneity between the effect estimates for first and subsequent events (p value for heterogeneity = 5.6 × 10(-11)). We found no evidence for biases to account for these findings. CONCLUSIONS: Ch9p21 shows differential association with risk of first versus subsequent CHD events. This has implications for genetic risk prediction in patients with established CHD and for mechanistic understanding of how Ch9p21 influences risk of CHD.

Item Type:
Journal Article
Journal or Publication Title:
Journal of the American College of Cardiology
Additional Information:
Copyright © 2014 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.
Subjects:
ID Code:
73913
Deposited By:
Deposited On:
18 Jun 2015 05:56
Refereed?:
Yes
Published?:
Published
Last Modified:
08 Jul 2020 04:39