. Author manuscript; available in PMC: 2021 Apr 1.

Published in final edited form as: Neuromuscul Disord. 2020 Feb 20;30(4):277–282. doi: 10.1016/j.nmd.2020.02.007

Table 5.

Quantitative muscle testing (QMT) and accelerometry change over time

Measure	N	Baseline mean ± SD and Visit 2 mean ± SD	p-value	N	Baseline mean ± SD and Visit 3 mean ± SD	p-value
Arm QMT (lbs)	40	24 ± 12	0.002	28	26 ± 12	<0.001
Arm QMT (lbs)		21 ± 11			19 ± 9
Indexed arm QMT (lbs/year)	40	2.0 ± 1.2	<0.001	28	2.2 ± 1.2	<0.001
Indexed arm QMT (lbs/year)		1.6 ± 1.0			1.4 ± 0.8
Leg QMT (lbs)	40	44 ± 26	<0.001	28	48 ± 21	<0.001
Leg QMT (lbs)		37 ± 17			36 ± 16
Indexed leg QMT (lbs/year)	40	3.7 ± 2.2	<0.001	28	4.1 ± 2.3	<0.001
Indexed leg QMT (lbs/year)		2.9 ± 1.6			2.6 ± 1.3
Total QMT (lbs)	40	67 ± 31	<0.001	28	74 ± 32	<0.001
Total QMT (lbs)		58 ± 27			55 ± 24
Indexed total QMT (lbs/year)	40	5.7 ± 3.3	<0.001	28	6.3 ± 3.4	<0.001
Indexed total QMT (lbs/year)		4.5 ± 2.5			4.0 ± 2.1
Total wrist VM (counts/min)	36	1240 (644, 2000)	0.040	20	1210 (648, 1760)	0.004
Total wrist VM (counts/min)		1210 (598, 1680)			967 (436, 1350)
Awake wrist VM (counts/min)	33	2010 (1140, 2590)	0.020	22	1860 (1090, 2410)	0.009
Awake wrist VM (counts/min)		1710 (1050, 2290)			1360 (1060, 1730)
Total ankle VM (counts/min)	27	77 (30, 471)	0.080	16	202 (51, 563)	0.049
Total ankle VM (counts/min)		94 (46, 250)			73 (38, 160)
Awake ankle VM (counts/min)	24	102 (52, 692)	0.068	14	253 (61, 716)	0.016
Awake ankle VM (counts/min)		130(52, 356)			73 (38, 160)

SD = standard deviation

IQR = interquartile range

lbs = pounds

VM = vector magnitude