Impact of transcranial electrical stimulation on serum neurotrophic factors and language function in patients with speech disorders

Table 1 Comparison of serum neurofactors between the two groups before and after intervention (mean ± SD, pg/mL)

Group		Control group (n = 40)	Observation group (n = 41)	t	P value
GDNF	Before the intervention	365.22 ± 39.84	369.71 ± 41.25	0.4981	0.6198
	After the intervention	378.65 ± 40.57a	433.28 ± 48.71a	5.4776
BDNF	Before the intervention	21.88 ± 3.87	20.98 ± 3.65	1.077	0.2848
	After the intervention	23.05 ± 3.54a	30.96 ± 4.15a	9.2186
CNTF	Before the intervention	18.83 ± 3.35	18.91 ± 3.42	0.1063	0.9156
	After the intervention	19.92 ± 3.21a	23.17 ± 3.14a	4.6063
NGF	Before the intervention	19.79 ± 3.11	19.92 ± 3.08	0.189	0.8506
	After the intervention	22.54 ± 3.25a	33.48 ± 4.02a	13.4492

^aP < 0.05, comparison before and after intervention in the group.

CNTF: Ciliary neurotrophic factor; GDNF: Glial cell-derived neurotrophic factor; BDNF: Brain-derived neurotrophic factor; NGF: Nerve growth factor.