Table 2.
Test-retest reliability (ICC(3,2) with 95% confidence interval) and minimal detectable change (MDC95) for the motor dual task effect, cognitive dual task effect, modified attention allocation index, and combined dual task effect for each groups (PD, AD, and healthy). Test-retest reliability (Cohen’s κ with 95% confidence interval) for task prioritization category for each group.
| PD (n=37) | AD (n=34) | Healthy (n=34) | |
|---|---|---|---|
| mDTE | ICC=.825 (.687 to .906)** MDC= 21.0 | ICC=.841 (.705 to .917)** MDC= 18.9 | ICC=.815 (.710 to .885)* MDC= 8.9 |
| CogDTE | ICC=.887 (.792 to .940)** MDC= 42.5 | ICC=.827 (.681 to .910)** MDC= 40.9 | ICC=.658 (.416 to .813)** MDC= 10.9 |
| Task prioritization category | κ=.236 (−.089 to.561) | κ=.171 (−.201 to.543) | κ=.457 (.126 to.788)** |
| mAAI | ICC=.776 (.607 to .878)** MDC= 42.1 | ICC=.690 (.462 to .832)** MDC= 40.8 | ICC=.353 (.022 to .641)* MDC= 13.1 |
| cDTE | ICC=.968 (.940 to .984)** MDC= 92.4 | ICC=.938 (.880 to .969)** MDC= 80.5 | ICC=.945 (.892 to .972)** MDC= 18.2 |
*
=p value <.05
**
=p value<.001
PD – Parkinson’s disease, AD – Alzheimer’s disease, mDTE – motor dual task effect, cogDTE – cognitive dual task effect, mAAI – modified attention allocation index, cDTE – combined dual task effect