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Table 1 Frequency and percentage of demographic and reproductive data of the study groups

From: The association between reproductive history and menopausal symptoms: an evidence from the cross-sectional survey

Characteristics   Menopausal status (n, %) p value
Premenopause Perimenopause Postmenopause
Age \(\overline{X}\) ± S.D 41.24 ± 5.31 42.51 ± 5.35 55.57 ± 5.93 0.001*
BMI \(\overline{X}\) ± S.D 29.11 ± 4.56 31.76 ± 5.45 28.99 ± 4.77 0.001*
Age of menarche \(\overline{X}\) ± S.D 13.07 ± 1.66 13.03 ± 2.01 12.87 ± 1.67 0.59**
Age of first pregnancy \(\overline{X}\) ± S.D 22.63 ± 5.29 20.35 ± 3.57 21.64 ± 5.12 0.132**
Parity \(\overline{X}\) ± S.D 1.27 ± 1.08 1.67 ± 1.18 3.44 ± 2.13 0.001*
Number of abortions \(\overline{X}\) ± S.D 0.33 ± 0.67 0.44 ± 0.81 0.55 ± 0.95 0.387*
Number of children 0 23 (32.9%) 20 (27.8%) 32 (44.4%) 0.018*
1 29 (41.4%) 23 (31.9%) 17 (23.6%)  
2 18 (25.7%) 22 (30.6%) 17 (23.6%)  
3 0 (0.0%) 7 (9.7%) 6 (8.3%)  
Age of menopause \(\overline{X}\) ± S.D 47.68 ± 5.57
Type of delivery No delivery 20 (28.6%) 18 (25%) 2 (2.8%) 0.001*
Cesarean section (CS) 28 (40%) 23 (31.9%) 11 (15.3%)  
Natural childbirth (NC) 18 (25.7%) 23 (31.9%) 45 (62.5%)  
CS + NC 4 (5.7%) 8 (11.1%) 14 (19.4%)  
Gynecological surgery history Yes 35 (50%) 47 (65.3%) 41 (56.9%) 0.195**
No 35 (50%) 25 (34.7%) 31 (43.1%)  
History of using hormonal contraception Yes 33 (47.1%) 39 (54.2%) 46 (63.9%) 0.134**
No 37 (52.9%) 33 (45.8%) 26 (36.1%)  
  1. BMI: body mass index; \(\overline{X}\) ± S.D: Mean ± Standard deviation. The p value is a test for a difference between the mean of continuous variables, and for a difference between the categorical variables. The asterisk by the p values indicates which tests are ''*Kruskal-Wallis'' or ''**Mann-Whitney''