Table 4. Seronegativity for anti-rubella IgG in pregnant women of Italian and foreign origin by age (2008-2010).

Age (years)	Origin
	Italian		Foreign		P	Total
	No.	% (95% CI)	No.	%(95% CI)		No.	% (95% CI)
		8.0		11.4			10.0
≤20	2/25	(0.00-18.63)	4/35	(0.87-21.93)	NS	6/60	(2.41-17.59)
		6.1		13.5			9.5
21-30	30/490	(3.98-8.22)	56/415	(10.21-16.79)	<0.01	86/905	(7.59-11.41)
		6.0		9.2			6.7
31-40	63/1050	(4.56-7.44)	26/282	(5.83-12.57)	NS	89/1332	(5.36-8.04)
		10.0		11.1			10.2
>40	7/70	(2.97-17.03)	2/18	(0.00-25.61)	NS	9/88	(3.88-16.52)
		6.2		11.7			8.0
Total	102/1635	(5.03-7.37)	88/750	(9.40-14.00)	<0.01	190/2385	(6.91-9.09)

NS, not significant