Developing a Japanese version of the Injustice Experience Questionnaire-chronic and the contribution of perceived injustice to severity of menstrual pain: a web-based cross-sectional study

Table 4 Multivariable regression analysis examining the association between sample characteristics and severity of menstrual pain (n = 120)

		β (95%CI)	R ²	F
Dependent = maximum menstrual pain			0.11	0.38
	log IEQ-chr	0.22 (−0.03–0.48)
	log HADSanxiety	0.14 (− 0.13–0.41)
	log HADSdepression	−0.08 (− 0.36–0.19)
	Age	−0.08 (− 0.27–0.11)
	Body mass index	0.04 (−0.14–0.22)
	Irregular menstruation	−0.08 (− 0.27–0.10)
	Diagnosed as endometriosis	0.12 (−0.06–0.30)
Dependent = average menstrual pain			0.11	0.33
	log IEQ-chr	0.22 (−0.03–0.48)
	log HADSanxiety	0.19 (−0.08–0.46)
	log HADSdepression	−0.14 (− 0.41–0.14)
	Age	0.01 (−0.19–0.19)
	Body mass index	0.03 (−0.16–0.21)
	Irregular menstruation	−0.04 (− 0.22–0.14)
	Diagnosed as endometriosis	0.13 (−0.05–0.31)
Dependent = impairment due to menstrual pain			0.35	0.22
	log IEQ-chr	0.36 (0.14–0.58)‡
	log HADSanxiety	0.22 (−0.1–0.46)
	log HADSdepression	0.06 (−0.18–0.29)
	Age	−0.04 (− 0.21–0.12)
	Body mass index	−0.06 (− 0.22–0.09)
	Irregular menstruation	−0.01 (− 0.16–0.15)
	Diagnosed as endometriosis	−0.05 (− 0.20–0.10)

β standerdized regression coefficient, IEQ Injustice Experiences Questionnaire
HADS Hospital Anxiety and Depression Scale
‡ p <0.001

ISSN: 1751-0759