Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học đề tài : Prevalence of visual impairment in relation to the number of ophthalmologists in a given area: a nationwide approach | BioMed Central Health and Quality of Life Outcomes Research Open Access Prevalence of visual impairment in relation to the number of ophthalmologists in a given area a nationwide approach Antoine J Lafuma1 Antoine P Brézin2 Francis L Fagnani1 Mounir Mesbah3 and Gilles H Berdeaux 4 5 Address 1Cemka 43 Boulevard du Maréchal Joffre F-92340 Bourg-la-Reine France 2Centre Hospitalier Universitaire Cochin Service d Ophtalmologie 24 rue du Faubourg Saint Jacques F-75014 Paris France 3Université Pierre Et Marie Curie UPMC Laboratoire de Statistique Theorique et Appliquée 175 rue du Chevaleret F-75013 Paris France 4Conservatoire National des Arts et Métiers 292 rue Saint-Martin F-75003 Paris France and 5Alcon France. 4 Rue Henri Sainte Claire Deville F-92563 Rueil-Malmaison France Email Antoine J Lafuma - Antoine P Brézin - Francis L Fagnani - Mounir Mesbah - mesbah@ Gilles H Berdeaux - Corresponding author Published 06 June 2006 Received 16 February 2006 Health and Quality of Life Outcomes 2006 4 34 doi 1477-7525-4-34 Accepted 06 June 2006 This article is available from http content 4 1 34 2006 Lafuma et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Sociological and economic risk factors of visual impairment have never been described in France at a national level as the association between the number of ophthalmologists per inhabitant and visual impairment prevalence. Methods Two national surveys were pooled. First 2075 institutions were selected at random from the French Health Ministry files. Second a random stratified sample of 356 208 citizens living in the
