Table 5.
Registry | Age of Ascertainment | Prevalence Microtia-Anotia | Prevalence Anotia | Prevalence Microtia | Types of microtia included (c) | Authors | Year |
---|---|---|---|---|---|---|---|
Navajo (USA) | > 21 years old | 9.7 | nr | nr | nr | Jaffe et al | 1967 |
New Mexico (USA) | Any age | 1.3 | nr | nr | I–IV | Aase et al | 1977 |
Navajo (USA) | 4–14 years old | 12.0 | nr | nr | nr | Nelson et al | 1984 |
South America(b) | LB | 3.2 | nr | nr | I–IV | Castilla et al | 1986 |
Italy | LB+SB | 1.5 | 0.3 | 1.2 | I–IV | Mastroiacovo et al | 1995 |
Central East France | LB+SB | 0.8 | 0.4 | 0.4 | I–IV | Harris et al (a) | 1996 |
California (USA) | LB+SB | 2.0 | 0.2 | 1.8 | I–IV | Harris et al (a) | 1996 |
Sweden | LB+SB | 2.4 | 0.2 | 2.1 | I–IV | Harris et al (a) | 1996 |
China | LB+SB | 1.4 | nr | nr | nr | Zhu et al | 2000 |
California (USA) | LB+SB | 2.2 | nr | nr | nr | Shaw et al (a) | 2004 |
Hawaii (USA) | LB+SB+ETOP | 3.8 | 0.3 | 3.5 | II–IV | Forrester et al | 2005 |
Chile | LB+SB | 8.8 | 0.5 | 8.3 | I–IV | Nazer et al | 2006 |
Finland | LB+SB | 4.3 | 0.2 | 4.1 | I–IV | Suurtala et al | 2007 |
Texas (USA) | LB+SB+ETOP | 2.8 | nr | nr | nr | Husain et al | 2008 |
Texas (USA) | LB+SB+ETOP | 2.9 | 0.2 | 2.7 | II–IV | Canfield et al | 2009 |
All prevalence rates are per 10,000 births
LB=Livebirth, SB=Stillbirth, ETOPFA=Elective termination of pregnancy for fetal anomalies
nr= not reported
Excluded cases with known chromosomal anomalies
Argentina, Brazil, Chile, Ecuador, Peru, Uruguay, and Venezuela
According to Marx Classification