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Table 1 Demographic characteristics of the study participants in the treatment (Black cohosh) and control (placebo) groups

From: Efficacy of black cohosh (Cimicifuga racemosa L.) in treating early symptoms of menopause: a randomized clinical trial

Variables Treatment Control Statistical results
(n = 42) (n = 42)
  Mean ± SD Mean ± SD  
Age (years) 51.4 ± 4 51.7 ± 4.2 t = 0.78, df = 82, P = 0.43
Length of menopause (months) 35.1 ± 20.6 31.4 ± 21.3 t = 0.82, df = 82, P = 0.41
Systolic blood pressure (mmHg) 115.7 ± 13.5 115.2 ± 8.6 t = 0.19, df = 82, P = 0.84
Diastolic blood pressure (mmHg) 79.2 ± 6.7 77.3 ± 6.6 t = 1.30, df = 82, P = 0.19
Body mass index (kg/m2) 27.6 ± 3.6 26.3 ± 2.9 t = 1.83, df = 82, P = 0.07
n (%) n (%)  
Education    
 Elementary 9 (21) 6 (14) χ2 = 4.49
 Secondary 4 (9) 11 (26) df = 3
 High school 20 (47) 19 (45) P = 0.21
 Academic 9 (21) 6 (14)  
Employment    
 Housewife 33 (78) 33 (78) χ2 = 0.22
 Employed 4 (9) 5 (11) df = 2
 Retired 5 (11) 4 (9) P = 0.89
Income adequacy    
Yes 15 (35) 14 (33) χ2 = 0.17
To some extent 24 (57) 24 (57) df = 2
No 3 (7) 4 (9) P = 0.91
Exercise    
Never 7 (17) 10 (24) χ2 = 0.71
Sometimes 15 (36) 13 (31) df = 3
Often 13 (31) 12 (28) P = 0.87
Always 7 (17) 7 (17)  
Marital status    
Married 40 (95) 36 (86) χ2 = 3.54
Single 1 (2) 2 (4) df = 3
Divorced 1 (2) 1 (2) P = 0.31
Widowed 0 (0) 3 (3)