Mohammed M Abdull|Mansur Rabiu|Clare Gilbert|Sudhakar Selvaraj|Gudlavalleti Venkata Satyanarayana Murthy|Christian Ezelum|Gabriel Entekume
Prevalence and Risk Factors for Lens Opacities in Nigeria: Results of the National Blindness and Low Vision Survey
Abubakar Tafawa Balewa University|London School of Hygiene & Tropical Medicine|London School of Hygiene & Tropical Medicine|Public Health Foundation of India|Institute of Public Health
purpose investigate prevalence risk factors lens opacities among nationally representative sample nigerians aged 40 years methods across 305 clusters 13591 adults examined every seventh participant n 1722 sampled systematically examined detail including lens opacity grading lenses examined slitlamp pupil dilation graded using world health organization system significant opacities defined nuclear cortical posterior subcapsular opacity grade 1 hypermature cataract category opacity included hypermature opacity aphakiapseudophakiacouching data collected sociodemographic environmental factors including height weight results total 16311722 95 normative subsample lenses graded prevalence opacity 198 95 confidence interval ci 79217 prevalence types increased age higher females literate prevalence nuclear cortical posterior subcapsular 88 95 ci 75101 117 95 ci 100133 29 95 ci 2138 respectively multivariate analysis age independent risk factor types nuclear opacity also associated female sex odds ratio 24 95 ci 1536 lean body mass index bmi 20 95 ci 1135 igbo ethnic group 44 95 ci 2384 cortical opacity also associated female sex 21 95 ci 1530 yoruba 045 95 ci 0308 bmi lens opacities includes couching significantly lower guinea savannah region 04 95 ci 0209 living rain forest areas protective posterior subcapsular cataracts 03 95 ci 0107 conclusions fifth nigerian adults degree lens opacity studies needed investigate role ethnicity climate variables risk factors