Table 3.

Profile analysis results for Numeric Rating Scale.

Variable	Estimate	Standard Error	95% Confidence Intervals		t Value	P value
Intercept	50.63	3.02	44.74	56.53	16.76	<0.01
Week 1	−5.87	2.51	−10.76	−0.98	−2.34	0.02
Week 2	−7.43	2.51	−12.32	−2.54	−2.96	<0.01
Week 3	−1.08	2.51	−5.97	3.81	−0.43	0.67
active tDCS	4.42	4.27	−3.92	12.76	1.03	0.30
Week 1: active tDCS	−3.25	3.55	−10.17	3.67	−0.92	0.36
Week 2: active tDCS	−9.63	3.55	−16.55	−2.72	−2.71	<0.01
Week 3: active tDCS	−22.98	3.55	−29.90	−16.07	−6.48	<0.0001

Note. The baseline is used as the reference level for the time factor, and the sham tDCS group is used as the reference level for the intervention factor. “Week 1: active tDCS” denotes the interaction between the time factor and the treatment.