TABLE 1—

Pooled Period Prevalence of Spina Bifida per 100 000 Births by Birth Population and Fortification Status (Meta-Analysis): World Population, 1985–2010

	Fortification Mandatory		Fortification Not Mandatory
Birth Population	No. of Studies	Prevalence (95% CI)	No. of Studies	Prevalence (95% CI)
Live births	14	33.86 (31.05, 36.92)	34	48.35 (41.07, 56.93)
Live births and stillbirths	13	30.37 (27.42, 33.63)	37	47.74 (43.66, 52.20)
Live births, stillbirths, and terminations of pregnancy	14	35.22 (32.18, 38.56)	49	52.29 (46.28, 59.08)

Note. CI = confidence interval.