Table 1.

Comparison of Baseline Characteristics Between the 2 Groups (Mean ± SD)

Characteristics	Group A (N = 13)	Group B (N = 13)	P-value
Age (years)	26.62 ± 4.65	25.00 ± 4.42	0.373*
BMI (kg/m2)	21.66 ± 2.29	21.45 ± 2.69	0.830*
Age at menarche (years)	12.46 ± 1.45	12.92 ± 1.18	0.383*
Age at disease onset (years)	15.84 ± 3.36	16.53 ± 2.90	0.579*
Menstrual cycle (days)	28.15 ± 3.13	28.76 ± 1.74	0.542*
Menstrual days (days)	5.61 ± 1.71	5.61 ± 0.96	0.990*
Menstrual pain (VAS-P scores)	51.54 ± 10.08	46.92 ± 7.51	0.264**

Group A = perpendicular needling with De Qi.

Group B = transverse needling without De Qi.

^*P-value from between-groups comparisons using an independent sample test; ^**P-value from between-groups comparisons using a Mann–Whitney-U test.

SD, standard deviation; BMI, body mass index; VAS-P, visual analogue scale for pain.