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Cataract extraction rates in Olmsted County, Minnesota, 1980 through 1994
K H Baratz1, D T Gray, D O Hodge
1Department of Ophthalmology, Mayo Clinic, Rochester, Minn., USA. baratz.keith@mayo.edu
Archives of Ophthalmology (Chicago, Ill. : 1960)
|November 21, 1997
Summary
Cataract extraction rates in Olmsted County, Minnesota, significantly increased from 1980 to 1992. After peaking in 1992, these rates for cataract surgery appear to have plateaued or slightly declined by 1994.
Area of Science:
- Ophthalmology
- Public Health
- Epidemiology
Background:
- Cataract extraction is a common surgical procedure to restore vision.
- Understanding population-based trends in cataract surgery is crucial for healthcare planning.
Purpose of the Study:
- To analyze population-based trends in the incidence of primary cataract extractions.
- To examine changes in cataract surgery rates over time in a defined geographic area.
Main Methods:
- Retrospective cohort analysis of the Rochester Epidemiology Project databases (1980-1994).
- Inclusion of all primary cataract extractions performed on residents of Olmsted County, Minnesota.
- Age- and sex-adjusted incidence rates were calculated using Poisson regression.
Main Results:
- Overall annual age-adjusted rates increased from 133 per 100,000 in 1980 to a peak of 507 per 100,000 in 1992.
- Rates for females were 404 per 100,000 and for males were 320 per 100,000 annually.
- Rates slightly decreased to 470 per 100,000 by 1994, with an estimated overascertainment of 0.9%.
Conclusions:
- Cataract surgery rates generally increased annually from 1980 to 1992, with a plateau or slight decline observed in 1993-1994.
- These trends suggest a potential shift in utilization patterns for cataract surgery.
- Sustained changes in these rates could significantly impact future ophthalmologic resource allocation.