DPT Research & Evidence-Based Practice 5

Question 1

When critically appraising a diagnostic accuracy study, which tool is most commonly recommended?

Accepted Answer

QUADAS-2

Answer

QUADAS-2 (Quality Assessment of Diagnostic Accuracy Studies) is the standard appraisal tool specifically designed for diagnostic test accuracy studies.

Question 2

A physical therapist applies Bayesian reasoning to clinical decision-making. Which factor is updated using the likelihood ratio?

Accepted Answer

Post-test probability

Answer

Likelihood ratios are applied to pre-test probability (prior probability) to calculate post-test probability of disease.

Question 3

A researcher conducting a cohort study controls for age, sex, and comorbidities using statistical analysis. This process is called:

Accepted Answer

Multivariable adjustment

Answer

Multivariable (or multivariate) adjustment statistically controls for confounders when randomization is not possible, as in observational studies.

Question 4

Which level of the evidence hierarchy ranks BELOW randomized controlled trials but ABOVE case series?

Accepted Answer

Cohort studies

Answer

Cohort and other well-designed observational studies rank below RCTs but above case series and expert opinion in the evidence hierarchy.

Question 5

A physical therapist wants to measure whether a lumbar stabilization program reduces disability using a validated PRO instrument. Which outcome measure is most appropriate?

Accepted Answer

Oswestry Disability Index (ODI)

Answer

The Oswestry Disability Index is a validated patient-reported outcome measure specifically designed to quantify disability due to low back pain.

(DPT) Board Certified Doctor of Physical Therapy Practice Test

(DPT) Board Certified Doctor of Physical Therapy Practice Test

DPT Research & Evidence-Based Practice 5