Auricular Acupressure Combined with an Internet-Based Intervention or Alone for Primary Dysmenorrhea: A Control Study

Table 1

Comparisons of demographic characteristics between the groups.

Variables	AAII (𝑛=50)	AA (𝑛=50)	t
	Mean (SD)	Mean (SD)
Age (years)	16.94 (1.02)	17.94 (0.84)	0.75**
Age at menarche (years)	11.96 (1.21)	12.18 (1.56)	2.46
Menstrual cycle (days)	28.82 (3.74)	29.70 (4.02)	0.29
Menses duration (days)	5.86 (1.16)	5.24 (1.12)	0.002*
	𝑛 (%)	𝑛 (%)	𝜒^2
Menstrual regularity			0.00
Yes	30 (60.0)	30 (60.0)
No	20 (40.0)	20 (40.0)
Initial onset of menstrual pain			0.35
Menarche	13 (26.0)	11 (22.0)
<1 year after menarche	15 (30.0)	15 (30.0)
1-2 years after menarche	10 (20.0)	12 (24.0)
Others	12 (24.0)	12 (24.0)
Time of dysmenorrhea			0.25
Day before menses	11 (22.0)	9 (18.0)
First 2 days in menses	39 (78.0)	41 (82.0)

AAII: auricular acupressure combined with interactive internet; AA: auricular acupressure.
* 𝑃<0.05.
** 𝑃<0.001.