Prevalence of Congenital Anomalies: A Community-Based Study in the Northwest of Iran

Table 2

Prevalence rates (per 10 000 live births) of congenital anomalies by type (Tabriz-Iran, 2004–2012).

Congenital anomaly category	Number of anomalies	Rate (per 10 000)	95% confidence intervals
Nervous system anomalies (including NTDs)	60	26.67	(19.92, 33.40)
Neural tube defects (NTDs)	22	9.78	(5.69, 13.86)
Congenital heart diseases	46	20.44	(14.54, 26.34)
Ear and eye anomalies	32	14.22	(9.29, 19.14)
Musculoskeletal and connective tissue anomalies	24	10.67	(6.40, 14.93)
Cleft lip with/without palate	23	10.22	(6.04, 14.39)
Down's syndrome	17	7.6	(3.96, 11.14)
Anomalies of limb	16	7.11	(3.62, 10.59)
Digestive system anomalies	12	5.33	(2.31, 8.35)
Genitourinary tract and kidney	6	2.67	(0.53, 4.82)
Respiratory system anomalies	5	2.22	(0.27, 4.17)
Others	13	5.78	(2.63, 8.91)
Total	254	112.89	(99.08, 126.69)