Congenital esotropia in Olmsted County, Minnesota1☆,
Section snippets
Source of data
A population-based study of the prevalence of congenital esotropia combined with a nested case-control study is possible in Olmsted County, Minnesota because the city and county are relatively isolated from other urban centers and because the population is served by a largely unified medical care system that has accumulated comprehensive clinical records for many years. Rochester, Minnesota (1990 population, 69,995) is located 90 miles southeast of Minneapolis and St. Paul. Approximately 70% of
Results
The population-based study ascertained 47 cases of congenital esotropia from 17,536 live births during the 10-year study period from 1980 through 1989. These findings correspond to a birth prevalence of 27 per 10,000 (95% CI, 20–35), or 0.27%. All 47 children (24 males and 23 females) were white, a reflection of the racial composition of this geographic area.
Ninety-four Olmsted County children (49 males and 45 females) born during the period 1980 through 1989 were selected as gender- and birth
Discussion
Our population-based birth prevalence of 0.27% for congenital esotropia is lower than most previous studies, which reported a prevalence of 0.67% to 2%.9, 15, 18, 23, 24 Previous reports may have overestimated the prevalence of congenital esotropia for various reasons. First, many studies either included all forms of strabismus8, 9, 10, 24, 25, 26, 27, 28 or evaluated all esodeviations without distinguishing among individual entities, including congenital, acquired, or accommodative esotropia.6
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Cited by (0)
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This study was supported in part by a grant from the National Institutes of Health (AR30582), Bethesda, Maryland; an unrestricted grant from Research to Prevent Blindness, Inc., New York, New York; and Mayo Foundation, Rochester, Minnesota.
- 1
The authors have no commercial or proprietary interest in any products or instruments mentioned in this article.
- 2
Dr. Mohney is currently affiliated with the Division of Ophthalmology, East Tennessee State University, Johnson City, Tennessee.