Table 1 Comparison of demographic characteristics between pregnant, lactating and Non-pregnant/lactating groups

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