Table 3.

Partial correlations among healing time and clinical variables by using surgery time post injury as control variable (n=47)

		Healing time	Age (years)	Gender	GCS	Injury type	Callus volume (cm3)	Density of NGF+ cells (Num/0.01 mm2)	Density of VEGF+ cells	Density of CD31+ cells (positive area/total field area)
Healing time (days)	r	1	0.110	−0.047	0.765**	−0.747**	−0.632**	−0.837**	−0.831**	−0.847**
	P		0.467	0.757	0.000	0.000	0.000	0.000	0.000	0.000
Age (years)	r	0.110	1	0.049	0.089	−0.066	0.043	−0.052	−0.134	−0.057
	P	0.467		0.748	0.558	0.662	0.777	0.729	0.373	0.705
Gender	r	−0.047	0.049	1	−0.043	0.040	0.075	0.063	0.089	0.168
	P	0.753	0.748		0.778	0.790	0.622	0.677	0.557	0.264
GCS	r	0.765**	0.089	−0.043	1	−0.884**	−0.819**	−0.932**	−0.901**	−0.785**
	P	0.000	0.558	0.778		0.000	0.000	0.000	0.000	0.000
Injury type	r	−0.747**	−0.066	0.040	−0.884**	1	0.708**	0.951**	0.966**	0.813**
	P	0.000	0.662	0.790	0.000		0.000	0.000	0.000	0.000
Callus volume (cm3)	r	−0.632**	0.043	0.075	−0.819**	0.708**	1	0.774**	0.726**	0.677**
	P	0.000	0.777	0.622	0.000	0.000		0.000	0.000	0.000
Density of NGF+ cells (Num/0.01 mm2)	r	−0.837**	−0.052	0.063	−0.932**	0.951**	0.774**	1	0.972**	0.879**
	P	0.000	0.729	0.677	0.000	0.000	0.000		0.000	0.000
Density of VEGF+ cells (Num/0.01 mm2)	r	–0.831**	−0.134	0.089	−0.901**	0.966**	0.726**	0.972**	1	0.864**
	P	0.000	0.373	0.557	0.000	0.000	0.000	0.000		0.000
Density of CD31+ cells (positive area/total field area)	r	–0.847**	−0.057	0.168	−0.785**	0.785**	0.677**	0.879**	0.864**	1
	P	0.000	0.705	0.264	0.000	0.000	0.000	0.000	0.000

Notes:

^**Correlation is significant at the level of P<0.01 (two-tailed).

Abbreviations: GCS, Glasgow Coma Scale; NGF, nerve growth factor; VEGF, vascular endothelial growth factor.