What does it mean when we say that the study cited in Exercise 1 was double-blind? Data
Question:
What does it mean when we say that the study cited in Exercise 1 was “double-blind”?
Data From Exercise 1:
In a study designed to test the effectiveness of paracetamol (or acetaminophen) as a treatment for lower back pain, 1643 patients were randomly assigned to one of three groups: (1) the 547 subjects in the placebo group were given pills containing no medication; (2) 550 subjects were in a group given pills with paracetamol taken at regular intervals; (3) 546 subjects were in a group given pills with paracetamol to be taken when needed for pain relief. (See “E¢cacy of Paracetamol for Acute Low-Back Pain,” by Williams, et al., Lancet, doi:10.1016>S0140-6736(14)60805-9.) Is this study an experiment or an observational study? Explain.
Step by Step Answer:
Mathematical Interest Theory
ISBN: 9781470465681
3rd Edition
Authors: Leslie Jane, James Daniel, Federer Vaaler