The relationship between lower limb muscle volume and body mass in ambulant individuals with bilateral cerebral palsy

Table 2 Linear regression coefficients and gradients

Muscle	Subject group	Linear regression of muscle volume vs. body mass		CP Percentage difference in gradient to TD group
Muscle	Subject group	R²	Gradient	CP Percentage difference in gradient to TD group
Combined	TD	0.77**	62.57	40.6*
Combined	CP	0.75**	37.18	40.6*
Gluteus Maximus	TD	0.72**	15.82	38.7*
Gluteus Maximus	CP	0.80**	9.69	38.7*
Rectus Femoris	TD	0.56**	4.64	45.9^†
Rectus Femoris	CP	0.56**	2.51	45.9^†
Vastus lateralis and intermedius composite	TD	0.69**	20.2	35.0^†
Vastus lateralis and intermedius composite	CP	0.75**	13.12	35.0^†
Semi-membranosus	TD	0.64**	3.4	39.1
Semi-membranosus	CP	0.50**	2.07	39.1
Semi-tendinosis	TD	0.44**	3.33	57.4^†
Semi-tendinosis	CP	0.40**	1.42	57.4^†
Tiblias Anterior	TD	0.61**	2.05	55.6*
Tiblias Anterior	CP	0.70**	0.91	55.6*
Medial Gastrocnemius	TD	0.59**	3.44	45.9*
Medial Gastrocnemius	CP	0.49**	1.86	45.9*
Lateral Gastrocnemius	TD	0.76**	2.52	79.8*
Lateral Gastrocnemius	CP	0.48**	0.51	79.8*
Soleus	TD	0.72**	7.15	36.1^†
Soleus	CP	0.53**	4.57	36.1^†

Linear regression coefficients and gradients of the best-fit line for muscle volume against body mass for all of the muscles investigated together with the percentage difference in gradient of the CP group relative to the TD group. ** denotes p-value <0.001. *denotes p-value <0.05. ^†denotes p < 0.1

ISSN: 1471-2377