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. 2021 Mar 1;19:66. doi: 10.1186/s12955-021-01720-0

Table 1.

Comparison of demographic characteristics between pregnant, lactating and Non-pregnant/lactating groups

Variables Pregnant group (P)
N = 200
Lactating group (L)
N = 203
Non-pregnant/non-lactating (N)
N = 201
P value
Age* 29.69 ± 5.85 30.23 ± 5.18 32.59 ± 6.31 < 0.001
Gravid* 1.92 ± 1.33 1.17.86 1.15 ± 1.10 < 0.001
Parity* 1.05 ± 0.90 1.15 ± 0.82 0.99 ± 0.84 0.21
Number of children* 1.13 ± 0.88 1.16 ± 0.82 1.02 ± 0.83 0.24
Education** 0.41
  ≤ 12 years 38 (19.2) 30 (14.5) 35 (18.5)
   > 12 years 160 (80.8) 172 (85.5%) 155 (81.5)
Occupation** < 0.001
 Unemployed 3 (1.6) 2 (1) 5 (2.6)
 Self-employment 144 (75) 151 (75.6) 91 (47.6)
 Student 10 (5.2) 18 (9.1) 26 (13.8)
 Employed 35 (18.2) 29 (14.2) 68 (36)
Income (Tomans) < 0.001
  ≤ 1 Million 137 (72.5) 153 (76.9) 96 (50.8)
 1–3 Million 45 (23.8) 32 (16.4) 56 (29.9)
   > 3 Million 7(3.7) 13 (6.7) 36 (19.3)
Duration of marriage (year)* 7.03 ± 4.66 7.49 ± 4.61 5.16 ± 5.23 < 0.001
Duration of menstruation* 7.16 ± 1.43 7.24 ± 1.33 7.06 ± 2.88 0.67

*Values are given as mean ± SD using t test, **values are given as a number (%) using chi-squared test