Table 5.

Prevalence of microtia-anotia reported in the literature from 1960–2010.

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

^(a)Excluded cases with known chromosomal anomalies

^(b)Argentina, Brazil, Chile, Ecuador, Peru, Uruguay, and Venezuela

^(c)According to Marx Classification