Downloaded from bjo.bmj.com on November 12, 2010 - Published by group.bmj.com
Rapid assessment of avoidable blindness in three counties, Jiangxi Province, China Baixiang Xiao, Hannah Kuper, Chunhong Guan, et al. Br J Ophthalmol 2010 94: 1437-1442 originally published online September 18, 2010
doi: 10.1136/bjo.2009.165308
Updated information and services can be found at: http://bjo.bmj.com/content/94/11/1437.full.html
These include:
References
This article cites 11 articles http://bjo.bmj.com/content/94/11/1437.full.html#ref-list-1
Email alerting service
Receive free email alerts when new articles cite this article. Sign up in the box at the top right corner of the online article.
Notes
To request permissions go to: http://group.bmj.com/group/rights-licensing/permissions
To order reprints go to: http://journals.bmj.com/cgi/reprintform
To subscribe to BMJ go to: http://journals.bmj.com/cgi/ep
Downloaded from bjo.bmj.com on November 12, 2010 - Published by group.bmj.com
Global issues
Rapid assessment of avoidable blindness in three counties, Jiangxi Province, China Baixiang Xiao,1 Hannah Kuper,1 Chunhong Guan,2 Kirsten Bailey,3 Hans Limburg1 1
London School of Hygiene & Tropical Medicine, London, UK 2 The Fred Hollows Foundation, Nanchang, PR China 3 The Fred Hollows Foundation, Sydney, Australia Correspondence to Dr Xiao Baixiang, London School of Hygiene & Tropical Medicine, Keppel Street, London WC1E 7HT, UK;
[email protected] Accepted 16 September 2009 Published Online First 18 September 2010
ABSTRACT Background A survey was undertaken in 2007 to assess the prevalence and causes of blindness and visual impairment in people aged $50 years in three different counties in Jiangxi, South East China (Gao’an, Xin’gan and Wan’zai). The counties were purposively selected to assess the impact of established non-governmental organisation activities in two counties (Gao’an and Xin’gan) compared with a third county (Wan’zai) without such a programme. Methods Clusters of 50 people aged $50 years were sampled with a probability proportional to the size of the population. Because of differences in expected prevalence and resources available for conducting the surveys, the total sample size varied from 4699 in Gao’an (94.0% response rate) to 3834 in Xin’gan (95.9%) and 2861 (95.4%) in Wan’zai. Households within clusters were selected through random walk sampling. Visual acuity (VA) was measured with a tumbling ‘E’ chart. Ophthalmologists examined people with VA
