Table 3. Odds of the association between discrepant ultrasound-LMP information affecting the determination of gestational age outcomes and birth characteristics among foreign-born and Swedish-born mothers.

	Foreign-born			Swedish-born
	OR	95%CI	p value	OR	95%CI	p value
Year of birth
1991–1995 (ref)	1			1
1996–1999	0.99	[0.95,1.04]	0.742	0.98	[0.96,1.00]	0.016
2000–2004	0.98	[0.94,1.02]	0.372	0.95	[0.94,0.97]	<0.001
2005–2008	0.99	[0.95,1.03]	0.601	0.95	[0.93,0.97]	<0.001
2009–2012	0.98	[0.94,1.02]	0.254	0.92	[0.90,0.94]	<0.001
Newborn’s sex
Male (ref)	1			1
Female	1.11	[1.08,1.13]	<0.001	1.12	[1.11,1.13]	<0.001
Parity
Primiparous (ref)	1			1
Multiparous	1.04	[1.00,1.08]	0.007	0.95	[0.94,0.96]	<0.001
Maternal Height (linear)	1.04	[1.01,1.06]	0.043	0.99	[0.95,1.03]	0.655
Mother’s BMI
Normal weight (ref)	1			1
Underweight	0.95	[0.90,1.01]	0.094	0.98	[0.95,1.01]	0.214
Overweight	1.13	[1.10,1.16]	<0.001	1.08	[1.07,1.09]	<0.001
Obese	1.33	[1.28,1.38]	<0.001	1.26	[1.24,1.28]	<0.001
Maternal age
25–29 (ref)	1			1
< = 24	1.12	[1.08,1.15]	<0.001	1.19	[1.17,1.20]	<0.001
30–34	0.88	[0.85,0.90]	<0.001	0.87	[0.86,0.88]	<0.001
> = 35	0.75	[0.73,0.78]	<0.001	0.74	[0.73,0.76]	<0.001
Mother’s education attaintment
High (ref)	1			1
Low	1.19	[1.15,1.23]	<0.001	1.11	[1.09,1.13]	<0.001
Middle	1.09	[1.06,1.13]	<0.001	1.04	[1.03,1.05]	<0.001
Household disposable income
Botton (ref)	1			1
2	0.99	[0.96,1.02]	0.351	0.96	[0.94,0.98]	<0.001
3	0.95	[0.92,0.99]	0.014	0.92	[0.91,0.94]	<0.001
4	0.96	[0.92,1.01]	0.103	0.90	[0.88,0.91]	<0.001
Top	0.94	[0.90,0.98]	0.009	0.89	[0.87,0.90]	<0.001
Marital status
Married/cohabiting	1			1
Other	1.11	[1.06,1.15]	<0.001	0.99	[0.97,1.02]	0.262
Father’s origin
Swedish-born (ref)	1			1
Foreign-born	1.00	[0.97,1.03]	0.988	0.96	[0.94,0.98]	<0.001
Smoking during pregnancy
No (ref)	1			1
1 to 9 cig/per day	1.01	[0.96,1.05]	0.710	1.07	[1.05,1.09]	<0.001
10 + cig/per day	0.96	[0.89,1.03]	0.235	0.98	[0.96,1.01]	0.262

OR = Odd Ratios; CI = Confidence Intervals.