Table 1 Characteristics of participating infants (N = 838) in Part 1 and mothers (N = 42) and fathers (N = 38) in Part 2

Demographic variables

n (%) median [IQR] mean ± SD

n (%) median [IQR] mean ± SD

Numbers

n = 162

n = 332

n = 344

n = 42

n = 38

Age, years

30.5 ± 5.5

30.7 ± 5.4

31 ± 5.2

32 ± 4.9

34 ± 6.9

Educational level

n = 42

n = 36

 Higher education

31 (74)

17 (47)

 Upper secondary school

9 (21)

19 (53)

 Compulsory school

2 (4.8)

0

Work

n = 85

n = 172

n = 184

 Unemployed

5 (5.9)

34 (20)

30 (16)

 Part time

45 (53)

71 (41)

76 (41)

 Full time

35 (41)

67 (39)

78 (42)

Cohabitation status

n = 161

n = 317

n = 327

 Cohabitation

148 (93.1)

293 (92.4)

296 (90.5)

 Single/another living situation

11 (6.9)

24 (7.6)

31 (9.5)

Birth country

 Sweden

39 (92.9)

36 (94.7)

 Other

3 (7.1)

2 (5.3)

Parity

n = 160

n = 324

n = 336

n = 42

n = 37

 Primipara

60 (38)

129 (40)

125 (37)

20 (48)

18 (49)

 Multipara

100 (62)

195 (60)

211 (63)

22 (52)

19 (51)

Delivery mode

n = 160

n = 329

n = 337

n = 42

n = 38

 Vaginal birth

138 (85)

279 (84)

297 (88)

32 (76)

29 (76)

 C-section

22 (14)

45 (14)

40 (12)

10 (24)

9 (24)

Infant variables

 Gestational age at birth, weeks

39 [2]

39 [2]

39 [2]

39 [2]

39 (2.25]

Sex

 Female

74 (46)

155 (47)

169 (49)

26 (62)

22 (58)

 Male

88 (54)

177 (53)

175 (51)

16 (38)

16 (42)

Length of hospital stay, days

2 [2]

2 [2]

2 [2]

Breastfeeding at discharge from maternity unit

n = 156

n = 319

n = 329

 Exclusive

141 (90.4)

297 (93.1)

309 (89.8)

 Partial

13 (8.3)

19 (6)

20 (6.1)

 No

2 (1.3)

3 (0.9)

0