Comparison of Cataract Prevalence Over 6 Years
Author Information
Author(s): Tan Ava Grace, Wang Jie Jin, Rochtchina Elena, Mitchell Paul
Primary Institution: Centre for Vision Research, Westmead Millennium Institute, Department of Ophthalmology, University of Sydney, Westmead Hospital, Westmead, NSW, Australia
Hypothesis
This study aimed to compare age-specific cataract prevalence in two surveys conducted 6 years apart.
Conclusion
The study found that the prevalence of cortical and posterior subcapsular cataract remained stable, while nuclear cataract prevalence increased over the 6-year period.
Supporting Evidence
- The prevalence of cortical cataract was 23.8% in the first survey and 23.7% in the second survey.
- The prevalence of nuclear cataract increased from 18.7% to 23.9% over the 6 years.
- Age and gender distributions were similar between the two populations.
Takeaway
The researchers looked at how many people had different types of cataracts in two surveys done 6 years apart and found that most types stayed the same, but one type got a bit more common.
Methodology
The study involved two cross-sectional surveys of residents aged 49 and older, assessing cataract prevalence through lens photographs and grading.
Potential Biases
There may be risks of bias due to selective survival among participants without cataract.
Limitations
Possible selection bias and measurement error could have influenced the results.
Participant Demographics
Participants were permanent residents aged 49 years and older from two postcode areas in the Blue Mountains, Australia.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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