Table 3 Sensitivity analyses with extended sample, including non-singleton pregnancies and siblings of an earlier included child in the study cohort (N = 586,011)

Preterm birth

3,14

3,07 – 3,22

< 0,001

Small for gestational age

1,48

1,45 – 1,51

< 0,001

Maternal age

1,00

0,99 – 1,00

0,58

Children’s year of birth: 2012

0,94

0,92 – 0,96

< 0,001

Children’s year of birth: 2013

1,48

1,45 – 1,51

< 0,001

Children’s year of birth: 2014

7,52

7,38 – 7,66

< 0,001

Multiparous

0,88

0,87 – 0,89

< 0,001

Immigrant

1,01

0,99 – 1,02

0,36

Monthly household income

0,99

0,99 – 0,99

< 0,001

Neighborhood deprivation

1,02

1,01 – 1,02

< 0,001