Dynamic Balance in Spinal and Bulbar Muscular Atrophy: Relationship between Strength and Performance of Forward Lunge, Step Up and Over, and Step Quick Turn

Table 1

Comparisons between SBMA cohort and NeuroCom normative references on forward lunge, step quick turn, and step up and over tests. Right-sided data are presented.

Parameter	Age group (years)	SBMA cohort		Normative		value	Cohen’s
		Forward lunge
Distance (% ht.)	40-59	17		47		<0.001	4.5
	60-69	10		26		<0.001	4.2
Impact index (% wt.)	40-59	17		47		<0.001	2.4
	60-69	10		26		<0.001	1.1
Contact time (sec)	40-59	17		47		<0.001	1.9
	60-69	10		26		0.001	1.1
	40-59	17		47		<0.001	1.4
	60-69	10		26		0.06	0.6
Step quick turn
Turn time (sec)	40-59	20		47		0.009	1.0
	60-69	11		26		0.93	0
Turn sway (deg/sec)	40-59	20		47		0.13	0.5
	60-69	11		26		0.91	0
Step up and over
Lift up index (% wt.)	40-59	17		47		<0.001	1.9
	60-69	8		26		0.006	1.1
Movement time (sec)	40-59	17		47		<0.001	1.5
	60-69	8		26		0.42	0.4
Impact index (% wt.)	40-59	17		47		0.004	0.8
	60-69	8		26		0.22	0.4