Table 2.

Percentage of fibrous tissue in the experimental groups and the control group (χ̄±s, CI).

Group	Percentage of fibrosis	Confidence Interval
Control group	4.93±2.410	4.23~5.63
4w	39.61±9.474*,**	33.59~45.63
8w	46.35±6.979*,**	41.93~50.77
12w	49.64±6.909*,**	45.26~54.02
25w	57.05±7.588*,**	52.23~61.87

^*Difference between the experimental group and the control group was statistically significant (p<0.0001);

^**difference between each experimental group was statistically significant (p<0.05), excluding the difference between the 8 week and the 12 week groups (p=0.2576).