The MDC for the single limb crossover hop for distance is which value?

The MDC for the single limb crossover hop for distance is which value?

• A. 40.00 cm
• B. 44.00 cm
• C. 48.75 cm
• D. 49.17 cm

Answer: (D)

The main idea here is interpreting what the minimum detectable change means for a functional hop test. MDC is the smallest amount of change that exceeds the test’s measurement error with a chosen level of confidence (often 95%), so you can say the change is real and not just due to variability in how the test is performed. For the single limb crossover hop for distance, the reported MDC at 95% confidence is 49.17 cm. That means a change in hop distance of about 49 cm or more is likely a true improvement (or decline), beyond what you'd expect from measurement noise. This relatively large threshold reflects the greater variability inherent in this test—balance, distance, limb coordination, and day-to-day factors like warm-up and fatigue contribute to more measurement error. In practice, if a patient improves by less than roughly 49 cm, you’d be less confident that the change reflects real functional improvement rather than normal variation. Changes exceeding 49 cm, however, meet the criterion for a meaningful, reliable change.

The main idea here is interpreting what the minimum detectable change means for a functional hop test. MDC is the smallest amount of change that exceeds the test’s measurement error with a chosen level of confidence (often 95%), so you can say the change is real and not just due to variability in how the test is performed.

For the single limb crossover hop for distance, the reported MDC at 95% confidence is 49.17 cm. That means a change in hop distance of about 49 cm or more is likely a true improvement (or decline), beyond what you'd expect from measurement noise. This relatively large threshold reflects the greater variability inherent in this test—balance, distance, limb coordination, and day-to-day factors like warm-up and fatigue contribute to more measurement error.

In practice, if a patient improves by less than roughly 49 cm, you’d be less confident that the change reflects real functional improvement rather than normal variation. Changes exceeding 49 cm, however, meet the criterion for a meaningful, reliable change.