Differential cardiovascular impact of ω-3 fatty acid in patients at high cardiovascular risk in Asians versus non-Asians: Sub-analysis of the strength randomized clinical trial
Abstract
BACKGROUND/AIMS: Racial differences in lipid and cardiovascular risk profiles are well-established, including for Asians. We compared cardiovascular treatment effects of ω-3 carboxylic acid (CA) between Asians and non-Asians in this post-hoc analysis of the STRENGTH trial.
METHODS: The STRENGTH trial was a double-blinded randomized controlled trial of 13,078 high cardiovascular risk patients enrolled at 675 global centers. Efficacy and interactions of ω-3 CA for Asians (n = 1355) and non-Asians (n = 11,723) were assessed. The primary endpoint is a 5-point composite of cardiovascular death, non-fatal myocardial infarction, non-fatal stroke, coronary revascularization, and unstable angina hospitalizations.
RESULTS: In Asians, ω-3 CA was associated with significantly reduction in the primary endpoint during 3.6 ± 0.7 years follow-up with 81/698 (Kaplan-Meier estimate (KME): 14.8 %) events in the ω-3 CA group, 103/657 (KME: 20.4 %) events in the corn oil group, hazard ratio (HR) 0.72, 95 %CI 0.54-0.96, p = 0.03. In non-Asians, there was not a significant difference in primary endpoint rates, 704/5841 (KME: 15.6 %) events in the ω-3 CA group, 692/5882 (KME: 15.9 %) events in the corn oil group, HR 1.03 95 %CI 0.93-1.14, p = 0.60. There were significant interactions between race (Asian vs non-Asian) and treatment group for the primary endpoint (p = 0.02) and non-fatal stroke (p = 0.02).
CONCLUSION: In this exploratory analysis from the neutral STRENGTH trial, ω-3 CA was associated…
How strong is the evidence?
Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 2 of 5 (High · randomized trial). Randomized trials of a reasonable size are the strongest single-study design. Reported size: 11,723 participants or records.
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