Table 7.

Comparison of the serum levels of neurotransmitters between the each groups.

Serum levels of neurotransmitters		Sham-TEAS group (n = 40)	TEAS group (n = 41)	P
5-HT (ng/mL)	Before treatment	21.55 ± 4.58	20.55 ± 4.30	.313
	After treatment	19.65 ± 4.60***	29.90 ± 4.83	<.001
GABA (μmol/L)	Before treatment	13.86 ± 3.09	13.51 ± 3.26	.688
	After treatment	12.93 ± 2.37***	19.23 ± 2.95	<.001
DA (ng/mL)	Before treatment	8.04 ± 1.50	8.47 ± 1.40	.190
	After treatment	7.61 ± 1.28***	11.58 ± 1.93	<.001
NE (μmol/L)	Before treatment	5.37 ± 1.04	5.28 ± 1.02	.716
	After treatment	5.28 ± 1.11***	3.68 ± 1.07	<.001

5-HT = 5-hydroxytryptamine, DA = dopamine, GABA = gamma-aminobutyric acid, NE = noradrenaline.

^***Compared with sham-TEAS group, P < .001.