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

From: 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

   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)   
  1. β standerdized regression coefficient, IEQ Injustice Experiences Questionnaire
  2. HADS Hospital Anxiety and Depression Scale
  3. p <0.001