20. A clinical researcher wants to compare patient outcomes from a new practice guideline vs existing… Patients will be blindly assigned… Which research method should be used?
Answer: C
Randomized control trial is the appropriate research method.
A randomized control trial (RCT) is the best method for comparing patient outcomes from a new practice guideline versus an existing one, as it allows for blind assignment of patients and minimizes bias, ensuring that any differences in outcomes can be attributed to the interventions being tested.
A) Pretest-posttest
The pretest-posttest design involves measuring outcomes before and after an intervention, but it does not involve random assignment, which can lead to biases. This method is less rigorous than an RCT and does not adequately control for confounding variables that could affect the results.
B) Cross-sectional
A cross-sectional study examines data at a single point in time, providing a snapshot of outcomes but not allowing for causal inferences. This method does not involve intervention or random assignment, making it unsuitable for assessing the impact of practice guidelines on patient outcomes over time.
C) Randomized control trial
A randomized control trial is the gold standard for testing the efficacy of interventions, as it involves randomly assigning participants to different groups, thereby controlling for confounding factors. This method allows for a direct comparison of outcomes between those following the new practice guideline and those following the existing guideline.
D) Time-series
A time-series design involves repeated observations of a single group over time, which can show trends but lacks the control provided by random assignment. This method does not allow for a direct comparison between two distinct groups receiving different interventions, making it less effective for this research question.
Conclusion
The randomized control trial is definitively the correct answer because it provides robust evidence through randomization and control of variables, allowing for clear conclusions about the effectiveness of the new practice guideline. Other options fail to offer the same level of rigor and reliability in comparing patient outcomes.