The baseline features of both study groups had been well matched . The mean baseline LDL cholesterol level was 76 mg per deciliter , the mean HDL cholesterol rate was 42 mg per deciliter , the mean apolipoprotein A1 level was 137 mg per deciliter, and the mean apolipoprotein B level was 81 mg per deciliter. At the next prespecified interim analysis, which included 1135 primary end-stage events , the independent data and safety monitoring plank suggested termination of the trial for futility, relative to prespecified criteria . The executive and sponsor steering committee accepted this recommendation and terminated the trial; the median follow-up period was 31 months.These estimates differ from the ideals in Table 1 because they reflect adjustment for covariates. The sufferers in whom delirium made had a greater decline in cognitive function soon after surgery than do those without delirium . Although the original decline in the MMSE score was larger among patients with delirium, the rate of recovery among these sufferers during postoperative days three to five 5 was more rapid. The price of recovery from days 6 to 30 was the same in both groups . Nevertheless, from times 31 to 183, the per-day upsurge in the MMSE score was 0.01 points higher for the patients with delirium than for all those without delirium.