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Table 3 Menstrual bleeding interval before and after intervention in 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

  Length of menstruation cycle* Control group (n = 70) Water intake group (n = 70) p value**
Number (%) Number (%)
Before intervention     0.112
Short 16 (22.9) 22 (31.4)  
Normal 53 (75.7) 45 (64.3)  
Long 1 (1.4) 3 (4.3)  
The first menstrual cycle after intervention     0.321
Short 15 (21.4) 18 (25.7)  
Normal 55 (78.6) 52 (74.3)  
Long 0 (0.0) 0 (0.0)  
The second menstrual cycle after intervention     0.149
Short 16 (22.9) 22 (31.4)  
Normal 54 (77.1) 45 (64.3)  
Long 0 (0.0) 3 (4.3)  
  1. *Short: ≤ 21 days, Normal: 22–35 days, Long: ≥ 36 days
  2. **Chi-square test
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BMC Women's Health

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