CASE STUDY 27.4 IT REALLY IS TRUE ABOUT ASPIRIN

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} Some of the methodologically suspicious studies lacked double-blinding.What effect can this have on the results of a study?

A) The results will likely be biased.
B) The results won't be shown to the public.
C) The margin of error for the statistics calculated will be increased.
D) All of the above.