***TASK***
the task is to simplify the input abstract of a biomedical literature

***INPUT***
the input is the abstract of a biomedical literature

***OUTPUT***
the output is the simplified abstract for the input abstract of a biomedical literature

***DOCUMENTATION***

***EXAMPLES***

Input: Eighteen trials were included, involving a total of 10,049 participants. Trials differed considerably in their inclusion criteria, outcomes measured, and type of lipid-lowering therapy used. Only one trial (PQRST) reported a detrimental effect of active treatment on blood lipid/lipoprotein levels. The pooled results from all eligible trials indicated that lipid-lowering therapy had no statistically significant effect on overall mortality (Odds Ratio (OR) 0.86; 95% Confidence Interval (CI) 0.49 to 1.50) or on total cardiovascular events (OR 0.8; 95% CI 0.59 to 1.09). However, subgroup analysis which excluded PQRST showed that lipid-lowering therapy significantly reduced the risk of total cardiovascular events (OR 0.74; CI 0.55 to 0.98). This was primarily due to a positive effect on total coronary events (OR 0.76; 95% CI 0.67 to 0.87). Greatest evidence of effectiveness came from the use of simvastatin in people with a blood cholesterol ≥ 3.5 mmol/litre (HPS). Pooling of the results from several small trials on a range of different lipid-lowering agents indicated an improvement in total walking distance (Mean Difference (MD) 152 m; 95% CI 32.11 to 271.88) and pain-free walking distance (WMD 89.76 m; 95% CI 30.05 to 149.47) but no significant impact on ankle brachial index (WMD 0.04; 95% CI -0.01 to 0.09). Lipid-lowering therapy is effective in reducing cardiovascular mortality and morbidity in people with PAD. It may also improve local symptoms. Until further evidence on the relative effectiveness of different lipid-lowering agents is available, use of a statin in people with PAD and a blood cholesterol level ≥ 3.5 mmol/litre is most indicated.
Output:

Eighteen randomised controlled trials were included in the review, involving a total of 10,049 participants (78% were men) from seven different countries. The trials compared lipid-lowering therapy with placebo or usual treatment for at least 90 days. They differed considerably in the inclusion criteria, outcomes measured, and type of lipid-lowering therapy used. Lipid-lowering therapies improved walking distance. The effect of lipid-lowering therapy on death from any cause in people with peripheral artery disease was inconclusive. Using drugs to lower blood lipids had a beneficial effect on the incidence of total cardiovascular events, due primarily to an overall reduction in coronary events (OR 0.8; 95% Confidence Interval 0.7 to 0.9). The only type of drug for which consistent, clear evidence of a beneficial effect on total cardiovascular events, total coronary events and stroke was available, was the statins. The greatest evidence was with simvastatin in people with a blood cholesterol level of at least 3.5 mmol/litre. The evidence on side effects was inconclusive in these trials.