Table 6.

Subgroup analyses by type of healthcare costs

	Primary care (N = 457,221)		Secondary care (N = 215,000)		Paramedical care (N = 53,834)		Other care (N = 346,598)
	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI
Preterm birth	1,26	0,82 – 0,90	3,20	3,10 – 3,31	1,94	1,82 – 2,06	1,99	1,93 – 2,05
Small for gestational age	1,02	0,99 – 1,04	1,52	1,47 – 1,57	1,31	1,23 – 1,40	1,14	1,11 – 1,17
Maternal age	0,97	0,97 – 0,97	0,99	0,99 – 1,00	1,01	1,00 – 1,01	0,99	0,99 – 0,99
Children’s year of birth: 2012	1,32	1,30 – 1,34	1,18	1,14 – 1,22	0,40	0,37 – 0,42	0,85	0,83 – 0,86
Children’s year of birth: 2013	2,06	2,02 – 2,10	1,45	1,41 – 1,50	0,38	0,36 – 0,40	1,17	1,15 – 1,20
Children’s year of birth: 2014	0,69	0,67 – 0,71	3,36	3,26 – 3,46	0,33	0,31 – 0,35	0,90	0,87 – 0,92
Multiparous	0,87	0,86 – 0,88	1,09	1,07 – 1,12	1,10	1,05 – 1,15	1,10	1,08 – 1,12
Immigrant	1,11	1,10 – 1,13	0,94	0,92 – 0,97	1,03	0,98 – 1,08	1,17	1,15 – 1,19
Monthly household income	0,99	0,99 – 0,99	0,99	0,99 – 0,99	0,99	0,99 – 0,99	0,99	0,99 – 0,99
Neighborhood deprivation	1,03	1,03 – 1,03	1,01	1,01 – 1,02	1,01	1,00 – 1,02	1,02	1,02 - 1,02

High primary healthcare costs: €197.37 and higher

High secondary healthcare costs: €1731.53 and higher

High paramedical healthcare costs: €438.38 and higher

High other healthcare costs: €102.37 and higher