TABLE 4.

Clinical outcome measures in each group.

	TA (n = 24)	SA (n = 20)	p b	p c
Outcome Measure	Mean ± SD	Mean ± SD
SAS
Baseline	49.95 ± 10.82	49.96 ± 10.72	0.998	pT = 0.000
4 weeks	45.29 ± 7.97	46.68 ± 11.92	0.639	pT*G = 0.641
8 weeks	42.52 ± 6.94	45.64 ± 10.19	0.639	pG = 0.521
12 weeks	42.81 ± 8.28	45.16 ± 12.28	0.460	–
pa	<0.001	0.016	–	–
SDS
Baseline	51.19 ± 12.32	50.36 ± 12.92	0.826	pT = 0.000
4 weeks	48.19 ± 11.90	48.24 ± 14.11	0.990	pT*G = 0.359
8 weeks	46.09 ± 12.14	47.04 ± 10.45	0.778	pG = 0.777
12 weeks	44.29 ± 12.57	46.20 ± 11.41	0.591	–
pa	0.003	0.005	–	–
Attack frequency (times)
Baseline	3.76 ± 2.35	3.29 ± 1.59	0.436	pT = 0.002
4 weeks	3.44 ± 2.18	4.95 ± 3.58	0.085	pT*G = 0.204
8 weeks	3.00 ± 2.04	3.62 ± 3.12	0.424	pG = 0.313
12 weeks	2.64 ± 2.89	3.29 ± 1.77	0.378	–
pa	0.025	0.149	–	–
VAS score
Baseline	6.40 ± 1.55	5.60 ± 1.57	0.095	pT = 0.000
4 weeks	5.44 ± 1.63	4.81 ± 2.16	0.266	pT*G = 0.590
8 weeks	4.52 ± 2.38	4.05 ± 2.06	0.480	pG = 0.346
12 weeks	3.16 ± 2.24	3.33 ± 1.90#	0.782	–
pa	<0.001	<0.001	–	–
Intensity of the migraine
Baseline	2.00 ± 0.54	2.04 ± 0.67	0.829	pT = 0.000
4 weeks	1.43 ± 0.926	1.96 ± 0.539	0.019	pT*G = 0.144
8 weeks	1.38 ± 0.740	1.64 ± 0.995	0.330	pG = 0.112
12 weeks	1.38 ± 0.669	1.60 ± 0.913	0.367	–
pa	0.006	0.019	–	–

Values are expressed as (Mean ± SD).SA, sham acupuncture; SAS, Zung self-rating anxiety scale; SDS, Zung self-rating depression scale; TA, true acupuncture; VAS, visual analog scale.

*The p^a based on a paired-t test within-group comparisons; The p^b based on t-test between the two groups; p^c based on repeated measures; p^T, values for comparison between different time points; p^T*G based on Time*Group interaction; p^G based on comparison between different groups.