The Nigerian national blindness and visual impairment survey: Rationale, objectives and detailed methodology
نویسندگان
چکیده
منابع مشابه
The Nigerian national blindness and visual impairment survey: Rationale, objectives and detailed methodology
BACKGROUND Despite having the largest population in Africa, Nigeria has no accurate population based data to plan and evaluate eye care services. A national survey was undertaken to estimate the prevalence and determine the major causes of blindness and low vision. This paper presents the detailed methodology used during the survey. METHODS A nationally representative sample of persons aged 4...
متن کاملCauses of blindness and visual impairment in Nigeria: the Nigeria national blindness and visual impairment survey.
PURPOSE Determine causes of blindness and visual impairment among adults aged >or=40 years. METHODS Multistage, stratified, cluster random sampling with probability proportional to size procedures were used to identify a nationally representative sample of 15,027 persons >or=40 years of age. Distance vision was measured with a reduced logMAR tumbling E-chart. Clinical examination included a b...
متن کاملPrevalence of blindness and visual impairment in Pakistan: the Pakistan National Blindness and Visual Impairment Survey.
PURPOSE To determine the prevalence of blindness and visual impairment in adults aged 30 years and older in Pakistan and to assess socio-demographic risk factors. METHODS Multistage, stratified (rural/urban), cluster random sampling, with probability proportional-to-size procedures, was used to select a nationally representative, cross-sectional sample of adults 30 years of age or older. Each...
متن کاملPoverty and blindness in Pakistan: results from the Pakistan national blindness and visual impairment survey.
OBJECTIVE To explore the association between blindness and deprivation in a nationally representative sample of adults in Pakistan. DESIGN Cross sectional population based survey. SETTING 221 rural and urban clusters selected randomly throughout Pakistan. PARTICIPANTS Nationally representative sample of 16 507 adults aged 30 or above (95.3% response rate). MAIN OUTCOME MEASURES Associat...
متن کاملPrevalence of blindness and visual impairment in Nigeria: the National Blindness and Visual Impairment Study.
PURPOSE To determine the prevalence of blindness and visual impairment among adults aged > or = 40 years in Nigeria. METHODS Multistage, stratified, cluster random sampling with probability proportional to size procedures was used to identify a cross-sectional nationally representative sample of 15,027 persons > or = 40 years of age from all 36 states in Nigeria and the Federal Capital Territ...
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ژورنال
عنوان ژورنال: BMC Ophthalmology
سال: 2008
ISSN: 1471-2415
DOI: 10.1186/1471-2415-8-17