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Underlying medical conditions in young patients and ethnic differences in retinal vein occlusion
Insights
In young patients with retinal vein occlusion, hyperlipidaemia is more common than hypertension. Ethnic background also plays a role in the development of this condition.
Area of Science:
- Ophthalmology
- Vascular Medicine
Background:
- Retinal vein occlusion (RVO) affects patients of various ages.
- Associated medical conditions and demographic factors may influence RVO.
- Previous studies suggest hypertension as a risk factor, but its prevalence in younger RVO patients needs further investigation.
Purpose of the Study:
- To investigate the prevalence of associated medical conditions in young versus older patients with RVO.
- To explore potential etiological factors, including hyperlipidaemia, hypertension, and oral contraceptive use, in young RVO patients.
- To examine ethnic variations in the occurrence of RVO.
Main Methods:
- Retrospective analysis of 87 patients with RVO, divided into young (<50 years) and older (≥50 years) groups.
- Comparison of the prevalence of hypertension and hyperlipidaemia between the two age groups.
- Analysis of etiological factors in young patients, including oral contraceptive use.
- Examination of ethnic demographics in a larger cohort of 214 RVO patients from two centers.
Main Results:
- Younger RVO patients showed a significantly lower prevalence of hypertension (27%) compared to older patients (62%).
- Hyperlipidaemia was the predominant associated condition in young RVO patients (35%).
- Four young female patients were using oral contraceptives; ethnic variations showed low prevalence of RVO in Asian (3%) and West Indian (2%) populations, with no central RVO cases in West Indians.
Conclusions:
- Hyperlipidaemia, not hypertension, is the primary associated medical condition in young patients with RVO.
- Other etiological factors, such as oral contraceptive use, may contribute to RVO in younger individuals.
- Significant ethnic differences in RVO occurrence suggest a role for genetic or environmental factors in its etiology.
Abstract:
Eighty-seven patients with retinal vein occlusion were investigated for the prevalence of associated conditions, and divided in two groups, young (less than 50 years, n = 40) and an older group (greater than 50 years, n = 47). Young patients had a highly significant decreased prevalence of hypertension compared to the older group (27 per cent versus 62 per cent: P less than 0.001), with hyperlipidaemia being the predominant underlying condition (35 per cent). Four young female patients presenting with retinal vein occlusion were on the contraceptive pill. In the majority of young patients (60 per cent) an underlying medical condition could be identified. Striking ethnic differences in the occurrence of retinal vein occlusion have also been observed in a total of 214 patients referred without prior selection in two major ophthalmological centres over a four year period. Only 3 per cent of patients with retinal vein occlusion were Asian and 2 per cent of West Indian origin. In particular, no West Indian patient has been seen with the central form of venous occlusion. We conclude that hyperlipidaemia, and not hypertension, is the predominant associated medical condition in young patients and that other aetiological factors including the contraceptive pill may be found. Marked ethnic differences have also been observed which may give further insight into the exact aetiology of retinal vein occlusion.
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