What is the MDC value for the 6M timed hop?

What is the MDC value for the 6M timed hop?

• A. 0.15 s
• B. 0.20 s
• C. 0.12 s
• D. 0.17 s

Answer: (D)

Minimal detectable change for the 6M timed hop is the smallest time difference that shows a real change in performance beyond measurement error, with 95% confidence. It comes from the test’s reliability and measurement error: MDC95 = SEM × sqrt(2) × 1.96, where SEM = SD × sqrt(1 − ICC). In practice, studies on the 6-meter timed hop report MDC95 values around 0.17 seconds, so this value best reflects the threshold beyond normal variability. That means if a patient’s hop time changes by about 0.17 seconds or more, you can be reasonably confident the change is real. Smaller changes could be due to timing variability, day-to-day fluctuation, or tester technique. The other numbers don’t align with the commonly reported MDC95 for this test.

Minimal detectable change for the 6M timed hop is the smallest time difference that shows a real change in performance beyond measurement error, with 95% confidence. It comes from the test’s reliability and measurement error: MDC95 = SEM × sqrt(2) × 1.96, where SEM = SD × sqrt(1 − ICC). In practice, studies on the 6-meter timed hop report MDC95 values around 0.17 seconds, so this value best reflects the threshold beyond normal variability. That means if a patient’s hop time changes by about 0.17 seconds or more, you can be reasonably confident the change is real. Smaller changes could be due to timing variability, day-to-day fluctuation, or tester technique. The other numbers don’t align with the commonly reported MDC95 for this test.