***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: We included three trials with a total of 128 participants in this review. The duration of zinc supplementation ranged between four and 12 weeks. Risk of bias was unclear for most studies regarding selection bias (random sequence generation, allocation concealment) and detection bias (blinding of outcome assessment). No study reported on our key outcome measures (incidence of type 2 diabetes mellitus, adverse events, health-related quality of life, all-cause mortality, diabetic complications, socioeconomic effects). Evaluation of insulin resistance as measured by the Homeostasis Model Assessment of Insulin Resistance (HOMA-IR) showed neutral effects when comparing zinc supplementation with control (two trials; 114 participants). There were neutral effects for trials comparing zinc supplementation with placebo for total cholesterol, high-density lipoprotein (HDL) cholesterol, low-density lipoprotein (LDL) cholesterol and triglycerides (2 studies, 70 participants). The one trial comparing zinc supplementation with exercise also showed neutral effects for total cholesterol, HDL and LDL cholesterol, and a mean difference in triglycerides of -30 mg/dL (95% confidence interval (CI) -49 to -10) in favour of zinc supplementation (53 participants). Various surrogate laboratory parameters were also analysed in the included trials. There is currently no evidence on which to base the use of zinc supplementation for the prevention of type 2 diabetes mellitus. Future trials should investigate patient-important outcome measures such as incidence of type 2 diabetes mellitus, health-related quality of life, diabetic complications, all-cause mortality and socioeconomic effects.
Output:

We included three randomised controlled studies with a total of 128 participants in this review. The duration of zinc supplementation ranged between four and 12 weeks. No study reported on our patient-important key outcomes (new onset of type 2 diabetes mellitus, side effects, health-related quality of life, all-cause mortality, diabetic complications, socioeconomic effects). The effects of zinc supplementation are uncertain regarding insulin resistance and lipid levels in the blood (mainly cholesterol and triglycerides). The overall quality of the included studies was unclear because study authors did not provide important information for us to judge how the studies were performed (unclear risk of bias in most cases). In addition, the number of studies and participants is low and the study authors did not investigate important outcomes such as new onset of type 2 diabetes mellitus or side effects of zinc supplementation. This evidence is up to date as of March 2015.