Table 1.

Descriptive characteristics for patients with pregnancies complicated by neural tube defects before and after initiation of folate fortification of corn masa flour in 2016

	Before NTD/total pregnancies n = 3509/794,491	After NTD/total pregnancies n = 10,989/1,789,875	p-value
Age n (%)			0.129/ < .001*
15–19	198 (5.6)/66,144 (8.3)	604 (5.5)/171,937 (9.6)
20–24	782 (22.3)/179,610 (22.6)	2541 (23.1)/378,327 (21.1)
25–29	941 (26.8)/204,455 (25.7)	2975 (27.1)/432,085 (24.1)
30–34	954 (27.2)/177,772 (22.4)	2745 (25)/385,454 (21.5)
35–39	493 (14)/107,084 (13.5)	1642 (14.9)/253,734 (14.2)
40–44	141 (4)/41,084 (5.2)	441 (4)/112,162 (6.3)
45–50	0 (0)/18,342 (2.3)	41 (0.4)/56,176 (3.1)

*Significant values P < 0.05