Table 4.

The differences of chi-square statistical outcome in percentage of MCID cases between each two various follow-up points.

Follow-up	Group A		Group B		Group C
	Chi-Square	P value	Chi-Square	P value	Chi-Square	P value
4th week vs. 8th week	–	–	0.064	0.800	1.538	0.215
4th week vs. 12th week	0.108	0.742	–	–	6.066	0.014*
8th week vs. 12th week	0.108	0.742	0.064	0.800	1.567	0.211

The data of percentages was compared by the Chi-squared test. *P<0.05, there were statistically significant difference.