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White, Harvey D; Simes, John; Stewart, Ralph A H; Blankenberg, Stefan; Barnes, Elizabeth H; Marschner, Ian C; Thompson, Peter; West, Malcolm; Zeller, Tanja; Colquhoun, David M; Nestel, Paul; Keech, Anthony C; Sullivan, David R; Hunt, David; Tonkin, Andrew
Journal of the American Heart Association, 12/2013, Letnik: 2, Številka: 5Journal Article
Lipoprotein-associated phospholipase A2 (Lp-PLA2) levels are associated with coronary heart disease (CHD) in healthy individuals and in patients who have had ischemic events. The Long-term Intervention with Pravastatin in Ischemic Disease (LIPID) study randomized 9014 patients with cholesterol levels of 4.0 to 7.0 mmol/L to placebo or pravastatin 3 to 36 months after myocardial infarction or unstable angina and showed a reduction in CHD and total mortality. We assessed the value of baseline and change in Lp-PLA2 activity to predict outcomes over a 6-year follow-up, the effect of pravastatin on Lp-PLA2 levels, and whether pravastatin treatment effect was related to Lp-PLA2 activity change. Lp-PLA2 was measured at randomization and 1 year, and levels were grouped as quartiles. The prespecified end point was CHD death or nonfatal myocardial infarction. Baseline Lp-PLA2 activity was positively associated with CHD events (P < 0.001) but not after adjustment for 23 baseline factors (P = 0.66). In 6518 patients who were event free at 1 year, change in Lp-PLA2 was a significant independent predictor of subsequent CHD events after adjustment for these risk factors, including LDL cholesterol and LDL cholesterol changes (P < 0.001). Pravastatin reduced Lp-PLA2 by 16% compared with placebo (P < 0.001). After adjustment for Lp-PLA2 change, the pravastatin treatment effect was reduced from 23% to 10% (P = 0.26), with 59% of the treatment effect accounted for by changes in Lp-PLA2. Similar reductions in treatment effect were seen after adjustment for LDL cholesterol change. Reduction in Lp-PLA2 activity during the first year was a highly significant predictor of CHD events, independent of change in LDL cholesterol, and may account for over half of the benefits of pravastatin in the LIPID study.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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