Researchers conduct a randomized controlled trial to determine if a regular resistance exercise program improves post-operative function in knee surgery patients compared to patients who undergo an aerobic exercise program. The primary purpose of randomizing patients to each of the interventions in this trial is to avoid?
a. recall bias
b. selection bias
c. surveillance bias
d. non-random (differential) misclassification of exposure status e. non-random (differential) misclassification of outcome status
The answer is C surveillance bias wereby this arises when patient is in one exposure group have a higher probability of having the study outcome detected due to increased surveillance, screening or testing of the outcome itself or an associated symptom.
Researchers conduct a randomized controlled trial to determine if a regular resistance exercise program improves post-operative...
Researchers conduct a randomized controlled trial to determine if graduated aerobic physical activity reduces post-operative pain more than a graduated resistance exercise intervention. The primary purpose of blinding the investigators for this trial is to avoid: a. non-random (differential) misclassification of exposure status b. observer bias c. surveillance bias d. recall bias