Table 4.

Influencing factors of using non-medical ANC 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	0.40	0.24–0.65	0.0002	− 0.099 (− 0.105 to − 0.094)	0.33	0.21–0.50	< 0.0001	− 0.178 (− 0.180 to − 0.178)
2nd generation women	0.71	0.36–1.42	0.3322	− 0.037 (0 − .039 to − 0.035)	1.17	0.50–2.74	0.7117	0.025 ( 0.0.25 to 0.026)
Age (ref: 25–29)
18–24	0.42	0.17–1.03	0.0507	− 0.094 (− 0.100 to − 0.089)	0.81	0.67–0.97	0.0194	− 0.035 (− 0.035 to − 0.034)
30–34	0.64	0.34–1.17	0.1475	− 0.049 (− 0.052 to − 0.046)	1.04	0.88–1.23	0.0504	0.006 ( 0.006 to 0.006)
35+	0.46	0.24–0.88	0.0194	− 0.084 (− 0.089 to − 0.079)	1.06	0 88–1.28	0.5310	.009 (0.009 to − 0.010)
Educational attainment (ref: high)
Low	0.15	0.07–0.32	< 0.0001	− 0.204 (− 0.216 to − 0.193)	0.43	0.29–0.63	< 0.0001	− 0.137 (− 0.139 to − 0.136)
Medium	0.22	0.12–0.42	< 0.0001	− 0.161 (− 0.170 to − 0.152)	0.58	0.43–0.78	0.0003	− 0.088 (− 0.089 to − 0.087)
Household net income (ref: (900–1500 €)
< 900€	1.27	0.49–3.28	0.6267	− 0.013 (− 0.014 to − 0.012)	0.89	0.64–1.24	0.4903	− 0.019 (− 0.019 to − 0.018)
> 1500–2600€	1.43	0.67–3.04	0.3557	− 0.038 (− 0.040 to − 0.036)	1.26	0.95–1.67	0.1107	0.037 ( 0.036 to 0.037)
> 2600€	1.95	0.92–4.15	0.0838	0.033 ( 0.032 to 0.035)	1.77	1.29–2.43	0.0005	0.091 ( 0.090 to 0.092)
Parity (ref = primiparous)
Multiparous	0.20	0.11–0.38	< 0.0001	− 0.171 (− 0.181 to − 0.161)	0.36	0.31–0.41	< 0.0001	− 0.166 (− 0.167 to − 0.164)
Interaction terms
		1st gen. migrant women * low education			1.88	1.18–2.99	0.0078	0.101 ( 0.100 to 0.102)
		1st gen. migrant women * medium education			1.76	1.18–2.63	0.0053	0.091 ( 0.090 to 0.092)
		2nd gen. women * low education			0.87	0.36–2.08	0.7479	− 0.023 (− 0.023 to − 0.023)
		2nd gen. women * medium education			0.83	0.37–1.86	0.6428	− 0.031 (− 0.031 to − 0.030)
		1st gen. migrant women * income < 900€			0.78	0.58–1.20	0.2043	− 0.041 (− 0.041 to − 0.040)
		1st gen. migrant women * income > 1500–2600€			0.83	0.58–1.20	0.3274	− 0.030 (− 0.030 to − 0.029)
		1st gen. migrant women * income > 2600€			0.64	0.41–1.02	0.0598	− 0.071 (− 0.072 to − 0.070)
		2nd gen. women * income < 900€			1.16	0.67–1.99	0.6006	0.023 ( 0.023 to 0.024)
		2nd gen. women * income > 1500–2600€			0.42	0.36–0.67	0.0003	− 0.140 (− 0.141 to − 0.139)
		2nd gen. women * income > 2600€			0.24	0.13–0.45	< 0.0001	− 0.227 (− 0.230 to − 0.225)