the cumulative rate of cardiac end points at five years was 27.3 per 1,000 in the gemfibrozil group and 41.4 per 1,000 in the placebo group -- a reduction of 34.0 percent in the incidence of coronary heart disease ( 95 percent confidence interval , 8.2 to 52.6 ; p less than 0.02 ; two-tailed test ) .
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