Table 5.

Influencing factors of using antenatal classes in the BaBi study and Berlin perinatal study, adjusted for age and parity

	BaBi study				Berlin perinatal study
	OR	95% CI	p value	Marginal probability difference	OR	95% CI	p value	Marginal probability difference
Migration status (ref: women without migration background)
1st generation migrant women	0.42	0.28–0.65	< 0.0001	− 0.149 (− 0.153 to − 0.145)	0.37	0.31–0.44	< 0.0001	− 0.123 (− 0.125 to − 0.121)
2nd generation women	0.69	0.39–1.23	0.2056	− 0.065 (− 0.067 to − 0.063)	0.34	0.27–0.44	< 0.0001	− 0.130 (− 0.132 to − 0.128)
Age (ref 25–29)
18–24	0.19	0.08–0.43	< 0.0001	− 0.289 (− 0.297 to − 0.281)	0.53	0.42–0.66	< 0.0001	− 0.079 (− 0.080 to − 0.077)
30–34	0.91	0.57–1.43	0.6666	− 0.017 (− 0.018 to − 0.017)	1.15	0.95–1.40	0.1476	0.017 ( 0.017 to 0.018)
35+	1.07	0.64–1.79	0.7954	0.012 (0.011 to 0.012)	1.03	0.83–1.28	0.7736	0.004 ( 0.004 to 0.004)
Educational attainment (ref: high)
Low	0.37	0.20–0.69	0.0018	− 0.174 (− 0.179 to − 0.169)	0.23	0.17–0.30	< 0.0001	− 0.182 (− 0.185 to − 0.179)
Medium	0.53	0.36–0.78	0.0012	− 0.111 (− 0.114 to − 0.108)	0.69	0.58–0.82	< 0.0001	− 0.046 (− 0.046 to − 0.045)
Household net income (ref: (900–1500 €)
< 900 €	0.75	0.31–1.82	0.5281	− 0.049 (− 0.051 to − 0.048)	0.63	0.49–0.81	0.0004	− 0.056 (− 0.057 to − 0.055)
> 1500–2600 €	1.03	0.51–2.06	0.9370	0.005 ( 0.005 to 0.005)	1.59	1.30–1.94	< 0.0001	0.056 ( 0.055 to 0.057)
> 2600 €	1.22	0.63–2.35	0.5573	0.034 ( 0.033 to 0.035)	1.45	1.17–1.79	0.0006	0.045 (0.044 to 0.046)
Parity (ref = primiparous)
Multiparous	0.11	0.07–0.16	< 0,0001	− 0.389 (− 0.399 to − 0.378)	0.09	0.08–0.11	< 0.0001	− 0.292 (− 0.297 to − 0.287)