Adverse birth outcomes among native-born and foreign-born mothers in Taiwan: A population-based birth cohort study

Table 4 The association between family income and birth outcomes by maternal nativity: Taiwan Birth Cohort Study, 2005

Nativity	Income	Low birth weight								Preterm birth
		n	%	OR		95% CI	AOR^c		95% CI	n	%	OR	95% CI	AOR^d	95% CI
Taiwan-born	<NT$30,000	131	9.7	1.00			1.00			128	9.5	1.00		1.00
n = 17441	NT$30,000–69,999	685	7.1	0.71	***	0.59–0.87	0.75	*	0.60–0.94	835	8.7	0.91	0.74–1.10	1.01	0.81–1.27
	NT$70,000+	395	6.1	0.61	***	0.50–0.75	0.59	***	0.46–0.77	505	7.9	0.81	0.66–1.00	0.90	0.70–1.15
Foreign-born	<NT$30,000	33	4.0	1.00			1.00			52	6.2	1.00		1.00
n = 2649	NT$30,000–69,999	94	5.6	1.43		0.95–2.15	1.41		0.89–2.25	122	7.2	1.17	0.84–1.64	1.16	0.80–1.68
	NT$70,000+	6	5.0	1.28		0.53–3.12	1.24		0.41–3.77	8	6.7	1.08	0.50–2.33	1.04	0.42–2.60

*p<0.05, **p<0.01, ***p<0.001.
AOR^cd : Adjusted odds ratio for infant sex, birth order, maternal age, singleton, place of residence, maternal education, smoking during pregnancy, pregnancy complications, first-time prenatal care, and number of prenatal visits.
1 US dollar equaled 32.167 New Taiwan dollars in 2005 [21].

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