Fig. 6
Longitudinal agreement between the 95% MDCs from the reduced tests and the reference method for assessing the patient’s change in time. Reference method: “all five repetitions better than the best” method. Novel method: 95% MDC from linear mixed-effects models run on Trial2 − 3 and Trial3 − 4 data from T0 and T1 sessions. (A) participants are classified as unimproved, improved or worsened, and Cohen’s K (squared weights) is used as the agreement index. (B) participants are classified as stable or changed (i.e. worsened or improved), and Youden’s J is calculated as the agreement index. Measures are ranked according to their agreement with the reference method (the higher the index, the better the agreement). Grey bars, i.e. instrumental measures, are from the TUG instrumented with inertial sensors. White bars, i.e. manual measures, are from a stopwatch. TTD: TUG test duration; GS: gait speed; ω: peak vertical angular velocity during the first turning phase; Turning: duration of the first turning phase; STW: sit-to-walk duration. Youden’s J of STW was negative (-0.04) and plotted as zero for graphical reasons