Table 4 Information on the use of prepared infant formula (infant formula and breast milk/infant formula users)^a

(n = 203)

< 6 months

(n = 98)

≥ 6 months

(n = 105)

p value

First-born

(n = 113)

Later-born

(n = 90)

p value

Does the infant formula you use have the label “Infant formula in powdered form " or “Infant formula in liquid form “?

(1) Yes

92.1 (187)^b

91.8 (90)^c

92.4 (97)^d

0.886

94.7(107)^e

88.9 (80)^f

0.128

(2) No

7.9 (16)

8.2 (8)

7.6 (8)

5.3(6)

11.1 (10)

Which of the following do you use most often?

(1) Infant formula in powdered form

96.1 (195)

96.9 (95)

95.2 (100)

0.534

99.1(112)

92.2 (83)

0.012^*

(2) Infant formula in liquid form

3.9 (8)

3.1 (3)

4.8 (5)

0.9(1)

7.8 (7)

Where do you buy most of your infant formula?

(1) Supermarket

6.4 (13)

6.1 (6)

6.7 (7)

0.086

7.1(8)

5.6 (5)

0.309

(2) Drug stores and pharmacies

53.7 (109)

52.0 (51)

55.2 (58)

47.8(54)

61.1 (55)

(3) Online shop

28.1 (57)

34.7 (34)

21.9 (23)

31.9(36)

23.3 (21)

(4) Others

11.8 (24)

7.1 (7)

16.2 (17)

13.3(15)

10.0 (9)

Who among the following has chosen to use infant formula?

(1) Mother

94.1 (191)

91.8(90)

96.2 (101)

0.468

92.9 (105)

95.6 (86)

0.695

(2) Father

3.4 (7)

4.1 (4)

2.9 (3)

3.5(4)

3.3 (3)

(3) Family

0.5 (1)

1.0 (1)

0 (0)

0.9(1)

0 (0)

(4) Friends

0 (0)

0 (0)

0 (0)

0(0)

0 (0)

(5) Health professionals

2.0 (4)

3.1 (3)

1.0 (1)

2.7(3)

1.1 (1)

(6) Others

0 (0)

0 (0)

0 (0)

0(0)

0 (0)

Who among the following is most likely to purchase infant formula?

(1) Mother

75.9 (154)

68.4 (67)

82.9 (87)

0.042^*

70.8(80)

82.2 (74)

0.160

(2) Father

20.2 (41)

25.5 (25)

15.2 (16)

24.8(28)

14.4 (13)

(3) Family

3.9 (8)

6.1 (6)

1.9 (2)

4.4(5)

3.3 (3)

(4) Friends

0 (0)

0 (0)

0 (0)

0(0)

0 (0)

(5) Others

0 (0)

0 (0)

0 (0)

0(0)

0 (0)