. Author manuscript; available in PMC: 2012 Dec 5.

Published in final edited form as: Phys Ther. 2008 Sep 26;88(12):1482–1491. doi: 10.2522/ptj.20080117

Table 3.

Pearson product moment coefficient matrix between composite PPA score, PPA key components, Trail Making Test (Part B), Verbal Digit Span Backward Test, and Stroop Colour-Word Test (N = 158).

Variable	Trail Making Test (Part B) (s)	Verbal Digit Span Backward Test (max. 14 pts)	Stroop Colour-Word Test (s)
Composite PPA Score	0.37 ^**	− 0.36 ^**	0.23 ^**
Postural Sway(mm)	0.15	− 0.13	0.11
Quadriceps Strength (kg)	− 0.14	0.08	− 0.08
Hand Reaction Time (s)	0.19 ^*	− 0.12	0.28 ^**
Proprioception (deg)	0.08	0.13	− 0.003
Edge Contrast Sensitivity (dB)	− 0.08	0.06	0.04

P < 0.05

^**

P < 0.01.