Ultrasound in Prenatal Diagnostics and Its Impact on the Epidemiology of Spina Bifida in a National Cohort from Denmark with a Comparison to Sweden

Table 1

Spina bifida cases and detection divided in years; regression.

Year	Total SB cases	Prenatal diagnosis	Prenatal diagnosis < week 22
2008	15	14 (93.3%)	13 (86.7%)
2009	32	29 (90.6%)	27 (84.4%)
2010	38	35 (92.1%)	34 (89.4%)
2011	33	30 (90.9%)	28 (84.8%)
2012	28	27 (96.4%)	26 (92.9%)
2013	24	21 (87.5%)	21 (87.5%)
2014	35	34 (97.1%)	31 (88.6%)
2015	29	29 (100%)	27 (93.1%)
Total	234	219 (93.6%)	207 (88.5%)
value		0.99	0.99