Table 1 Background characteristics of study population, N = 1251

Mother

Age, years

29.9 (4.8)

30.3^a

Born outside Sweden

102 (8)

27.5^b

University education

701 (56)

49^b

Previous children

662 (53)

56^a

In a relationship

1221 (97)

34.0^a

Pregnancy

Level of pregnancy planning

 Highly planned

640 (51)

^d

 Quite planned

339 (27)

^d

 Neither planned nor unplanned

143 (11)

^d

 Quite unplanned

38 (3)

^d

 Highly unplanned

88 (7)

^d

Single pregnancy

1220 (98)

98^b

Multiple pregnancy

6 (0.5)

1.4^b

Mode of delivery

 Spontaneous vaginal

946 (76)

83^b

 Induced vaginal

198 (16)

16.7^a

 Planned Caesarean

98 (8)

8^b

Complications

 Haemorrhage(> 1000 ml)

90 (7)

7.2^c

 Emergency Caesarean

111 (9)

8^a

 Instrumental delivery

99 (8)

7.2^a

Infant

Birth weight, grams

3579 (548.8)

3565^b

Gestational age, weeks

40 (1.4)

39-40^b

Sex

 Girl

612 (49)

48.6^b

 Boy

636 (51)

51.3^b

Neonatal care

77 (6)

 ~ 10^b,e

Congenital state in need of care

 Malformation

23 (2)

2-3^a

 Injury

5 (0.4)

 Disease

34 (3)

3.7/1000^a