CASE STUDY 27.4 IT REALLY IS TRUE ABOUT ASPIRIN

Multiple Choice

CASE STUDY 27.4
IT REALLY IS TRUE ABOUT ASPIRIN
For Questions , use the following narrative
Narrative: Case study 27.4 summary
This study was a meta-analysis of clinical trials in which aspirin was used to prevent blood clots.The meta-analysis (covering both aspirin and more expensive anti-platelet drugs) combined the results of 300 trials involving 140,000 patients.Its recommendation: a regime of half a tablet of aspirin a day is valuable for all victims of heart attack and stroke, and other at-risk patients such as angina sufferers and recipients of coronary bypass grafts.The lead researcher was quoted as saying "This is one of the most cost-effective drug interventions one could have in developed countries."

-{Case study 27.4 narrative} What type of study was this?

A) An observational study.
B) A randomized experiment.
C) A type that uses a collection of statistical techniques for combining studies.
D) None of the above.