Table 1.
Birth Defects surveillance networks | Number of surveillance programs | Microtia-Anotia reporting | Ascertainment | Years considered | Pregnancy outcome ascertained |
---|---|---|---|---|---|
EUROCAT | 26 | Anotia only registered | Population-based | Longest available period up to 2007 | LB, SB, ETOPFA (b) |
ICBDSR | 39 | Microtia and Anotia are differentiated (a) | Mostly population-based | Longest available period up to 2007 | LB, SB, ETOPFA (c) |
NBDPN | 27 | Microtia and Anotia are not differentiated | Population-based | 2002–2006 | LB, SB, ETOPFA (d) |
LB = Livebirth, SB = Stillbirth, ETOPFA = Elective termination of pregnancy for fetal anomalies
Anotia and microtia are not differentiated in China CBDMN, Finland, Japan JAOG, and Mexico RYVEMCE
ETOPFA are not reported in Poland and Poland Wielkopolska
ETOPFA are not reported in Canada British Columbia, Canada National, China Beijing, China CBDMN, Italy Sicily, Japan JAOG, Spain ECEMC, and Ukraine
ETOPFA are not reported in Alaska, Arizona, Colorado, Florida, Illinois, Indiana, Kentucky, Massachusetts, Michigan, Mississippi, Nebraska, New Jersey, New York, Rhode Island, Tennessee, Virginia, and Wisconsin