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Table 1 Baseline characteristics of participants by the study groups

From: Internet-based cognitive-behavioral therapy for premenstrual syndrome: a randomized controlled trial

Variable Intervention (n = 46) Control (n = 46) P-value*
Age (years) 22.1 (2.7) 22.3 (2.5) 0.748
Menarche age (years) 12.9 (1.2) 13.0 (1.3) 0.680
PMS Score (assessed by PSST) 32.6 (6.8) 31.5 (6.4) 0.444
Depression score (assessed by Beck) 9.4 (6.9) 8.9 (7.2) 0.757
Body mass index (kg/m2) 22.1 (2.5) 21.6 (2.5) 0.319
Marital status (married) 5 (11%) 4 (9%) 0.726
Educational grade (master and above) 14 (30%) 16 (35%) 0.656
Family history of PMS (yes) 34 (74%) 29 (63%) 0.262
Regular exercise (yes) 10 (22%) 10 (22%) 1.000
Sufficiency of family income    
 Totally 15 (33%) 21 (46%)  
 To some extent 28 (61%) 23 (50%) 0.430
 Not at all 3 (6%) 2 (4%)  
  1. Intervention group received web-based counselling with cognitive-behavioural approach for eight weeks and control group received no intervention
  2. Data present mean (SD) or number (percent)
  3. PMS, premenstrual syndrome; PSST, Premenstrual Symptoms Screening Tool
  4. *T-test for comparison of the means and Chi-squared test for comparison of the frequencies