Table 1 Demographic characteristics of mothers of preterm infants of two groups (n = 80)

Age (year)**

P = 0.06***

F (1.78) = 483.4

 < 25

3

7.5

8

20

 25–30

14

35

17

42.5

 > 30

23

57.5

15

37.5

Mean ± SD

31.58 ± 5.81

28.82 ± 5.80

Education level***

Diploma/middle/high school

26

65

27

67.5

P = 0.549***

F = 1.354

 Bachelor’s/associate

13

32.5

10

25

 Master’s/higher

1

2.5

3

7.3

Income (tomans)

P = 0.160***

F = 3.462

 < 1.500000

20

50

15

37.5

 1.500000– 3.500000

18

45

25

62.5

 > 3.500000

2

5

0

0

Marital status***

P = 1***

F = 1.001

 Single (widow/or, divorced)

1

2.5

0

0

 Married

39

97.5

40

100

Having information about neonatal care*

P = 1*

χ² = 0

 Yes

11

27.5

11

27.5

 No

29

72.5

29

72.5

Informational sources of preterm neonatal care***

P = 0.670***

F = 2.968

 Healthcare providers

6

15

8

20

 Book

3

7.5

3

7.5

 Internet

2

5

0

0

 Others

1

2.5

0

0

 None

28

70

29

72.5

Children no.*

P = 0.540*

χ² = 2.182

 1

10

25

12

30

 2

12

30

16

40

 3

12

30

9

22.5

 > 3

6

15

3

7.5

Live birth no.*

P = 0.075*

χ² = 5.328

 1

10

25

15

37.5

 2

15

37.5

19

47.5

  ≥ 3

15

37.5

6

15

Stillbirth no.***

P = 0.768

Fisher’s exact test = 0.755

 0

27

67.5

28

70

 1

9

22.5

10

25

 ≥ 2

4

10

2

5

Pregnancy no.*

P = 0.153*

χ² = 3.750

 1

9

22.5

10

25

 2

10

25

17

42.5

 ≥ 3

21

52.5

13

32.5

Delivery type*

P = 0.179

χ² = 1.805*

 Vaginal

18

45

24

60

 Cesarean

22

55

16

40

Gestational age (week)****

P = 0.539****

Z = 0.740

 ≤ 34

16

40

11

27.5

 > 34

24

60

29

72.5

Mean ± SD

34.52 ± 1.86

34.32 ± 2.94

Max–Min

30–36

26–36