Incidence of registered visual impairment in the Nordic child population
| Autor: | Flage T, Viggosson G, Thomas Rosenberg, Kristina Tornqvist, Egill Hansen, Ruth Riise, Rudanko Sl |
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| Rok vydání: | 1996 |
| Předmět: |
Male
medicine.medical_specialty Pediatrics Adolescent Eye Diseases Visual impairment Iceland Scandinavian and Nordic Countries Blindness Cellular and Molecular Neuroscience Epidemiology Medicine Humans Prospective Studies Registries Prospective cohort study Child Finland business.industry Incidence (epidemiology) Incidence Infant Newborn Infant Retinopathy of prematurity medicine.disease Sensory Systems Ophthalmology El Niño Child Preschool Etiology Female medicine.symptom business Sex ratio Research Article |
| Zdroj: | The British journal of ophthalmology. 80(1) |
| ISSN: | 0007-1161 |
| Popis: | A collaborative, population based, prospective register study on the incidence of visual impairment in children during the year 1993 was carried out in five Nordic countries with a total population of 17 million inhabitants. The child population was 3.8 million individuals aged 0-17 years. The following variables were taken into account: nationality, age, sex, diagnoses, aetiology, degree of visual impairment, and additional impairments. Classification routines from an earlier prevalence study were used. The present study included 304 children corresponding to an incidence of notification of 8/100,000 children, varying from 5.7 to 11.1 in the five countries. Fifty per cent of the visually impaired children were reported before they were 3 years of age. In approximately 45% of the children, visual impairment was due to various brain disorders, with cerebral amblyopia and secondary optic atrophy as the two leading causes. The relative impact of retinopathy of prematurity had decreased from the third most frequent cause (10%) in the prevalence study to seventh place (4%) in the incidence study. Two thirds of the children had additional impairments and these children also suffered from the most severe visual impairments. Among aetiological factors the majority (64%) were prenatal. The overall male:female ratio of 1.4:1 was identical to the sex ratio of the prevalence study. |
| Databáze: | OpenAIRE |
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