Table 2. Comparison of changes in TGF β-1 expression (Unit: %).

	Day 3	Day 5††	Day 7
Control group (n=12)	99.2±8.1	99.0±5.7	99.5±9.7
Experimental group I (n=12)	105.7±8.1	130.2±12.1	101.2±8.8
Experimental group II (n=12)	105.7±7.9	146.6±11.4*	117.0±10.7
F	0.8	22.5	3.8
Post hoc		c>b>a

Values are presented as the mean±SD. Tested by one-way ANOVA (^†p<0.05; ^†† p<0.01) and Duncan's multiple range test. Tested by paired t-test (*p<0.05; **p<0.01). a. Control group: sham group (wound induced). b. Experimental group I: 25–65V, high voltage pulsed current (HVPCS). c. Experimental group II: 40–85V, HVPCS.