Table 5.

Sensitivity analyses with ethnicity categorized into 3 groups (native Dutch background as reference group)

	OR	95% CI	p
Preterm birth	2,83	2,75 – 2,91	< 0,001
Small for gestational age	1,44	1,41 – 1,48	< 0,001
Maternal age	0,99	0,99 – 0,99	< 0,001
Children’s year of birth: 2012	0,92	0,90 – 0,94	< 0,001
Children’s year of birth: 2013	1,38	1,35 – 1,41	< 0,001
Children’s year of birth: 2014	7,67	7,52 – 7,83	< 0,001
Multiparous	0,97	0,96 – 0,99	< 0,001
Western immigrant	0,88	0,86 – 0,91	< 0,001
Non-western immigrant	1,07	1,04 – 1,09	< 0,001
Monthly household income	0,99	0,99 – 0,99	< 0,001
Neighborhood deprivation	1,01	1,01 – 1,02	< 0,001