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Table 1 The demographic and menstrual characteristic of female students who suffered from primary dysmenorrhea in the water intake and control groups

From: The role of water intake in the severity of pain and menstrual distress among females suffering from primary dysmenorrhea: a semi-experimental study

  Control group (n = 70) Water intake group (n = 70) p value
Age (mean, SD) 21.6 (2.31) 22.4 (3.02) 0.10*
Menarche age (mean, SD) 12.8 (1.08) 13.2 (1.65) 0.10*
Age of menstrual pain initiation (mean, SD) 14.4 (2.28) 15.1 (2.29) 0.09*
Body Mass Index (mean, SD) 21.1 (2.47) 20.7 (2.04) 0.24*
Menstrual regularity (number, %)    0.18**
Regular 55 (78.6) 61 (87.1)  
Irregular 15 (21.4) 9 (12.9)  
Marital status (number, %)    0.66**
Single 56 (80) 58 (82.9)  
Married 14 (20) 12 (17.1)  
Faculty (number, %)    0.21**
Medical sciences 50 (71.4) 43 (61.4)  
Non-medical sciences 20 (28.6) 27 (38.6)  
  1. *t-test
  2. **Chi-square test