ATC Evidence-Based Practice 3

Question 1

A clinician calculates an NNT of 4 for a new ankle rehabilitation protocol. This means:

Accepted Answer

4 patients must be treated for one additional patient to benefit

Answer

Number Needed to Treat (NNT) represents how many patients must receive the treatment for one additional patient to achieve a beneficial outcome.

Question 2

Which bias occurs when participants or researchers know the treatment group assignment in a clinical trial?

Accepted Answer

Performance bias

Answer

Performance bias occurs when knowledge of group allocation influences how care is provided or how participants behave during the study.

Question 3

An athletic trainer wants to assess the reproducibility of a measurement tool across different testers. Which statistical measure is most appropriate?

Accepted Answer

Intraclass correlation coefficient (ICC)

Answer

The ICC is the preferred statistic for assessing inter-rater and intra-rater reliability of continuous measurements.

Question 4

In a clinical study, the control group receives a sham ultrasound treatment. This is an example of:

Accepted Answer

Placebo control

Answer

A sham treatment mimics the real intervention without the active component, serving as a placebo control to isolate treatment effects.

Question 5

Which level of evidence in most hierarchies ranks expert opinion without critical appraisal?

Accepted Answer

Level V

Answer

Expert opinion without critical appraisal or based solely on experience is typically ranked at the lowest level (Level V) of evidence hierarchies.

(ATC) Certified Athletic Trainer Practice Test

(ATC) Certified Athletic Trainer Practice Test

ATC Evidence-Based Practice 3