Table 2.

Single and dual-task gait performance according to pain distribution, 302 older adults, MOBILIZE Boston Study II.

Number of Pain Sites		No Pain		Single Site Pain		Multisite Pain
		(n=96)		(n=75)		(n=131)
Variables		Mean	SD	Mean	SD	Mean	SD
Gait Speed (m/sec)	Single-Task	1.00	0.23	0.87	0.27	0.84	0.24†
	Easy Dual-Task	0.85	0.23	0.72	0.25	0.71	0.24†
	Hard Dual-Task	0.78*	0.24	0.68*	0.25	0.67*	0.24†
Stride Length (cm)	Single-Task	113.33	21.34	104.05	23.50	100.18	20.47†
	Easy Dual-Task	105.53	22.40	95.45	24.41	93.41	21.30†
	Hard Dual-Task	102.18*	23.34	92.89*	24.39	90.86*	21.27†
Swing Time (%)	Single-Task	0.34	0.02	0.32	0.01	0.32	0.03†
	Easy Dual-Task	0.33	0.03	0.31	0.05	0.31	0.04†
	Hard Dual-Task	0.32*	0.04	0.30*	0.06	0.30*	0.04†
Double Support Time (%)	Single-Task	0.33	0.05	0.37	0.10	0.37	0.07†
	Easy Dual-Task	0.35	0.06	0.40	0.11	0.39	0.08†
	Hard Dual-Task	0.36*	0.07	0.42*	0.16	0.40*	0.09†
Stride Length Variability (CV)a	Single-Task	4.15	2.02	4.78	2.64	4.94	2.57†
	Easy Dual-Task	4.98	2.46	6.38	3.51	5.94	3.16†
	Hard Dual-Task	5.75*	3.24	7.09*	4.22	6.64*	3.58†
Swing Time Variability (CV)a	Single-Task	5.25	2.04	6.72	2.87	6.79	2.70†
	Easy Dual-Task	7.90	4.83	9.86	4.90	9.20	4.35†
	Hard Dual-Task	9.07*	6.09	11.35*	6.76	10.65*	5.78†

^*Test for column trend, according to dual-task difficulty within pain groups (ANOVA) p<0.05

^†test for row trend, for linear relationship across pain categories within gait test dual-task conditions (General Linear Model) p<0.05.

^aCV= coefficient of variation