The Use of Key Informant Method for Identifying Children with Blindness and Severe Visual Impairment in Developing Countries

References

• World Health Organization. Visual impairment and blindness, Fact Sheet No.282. Geneva: WHO, 2014.
   Google Scholar
• Negretti GS, Ayoub T, Ahmed S, et al. Cataract surgery outcomes in Bangladeshi children. Ophthalmology 2015;122:882–887.
   PubMed Web of Science ®Google Scholar
• Umar MM, Abubakar A, Achi I, et al. Pediatric cataract surgery in National Eye Centre Kaduna, Nigeria: outcome and challenges. Middle East Afr J Ophthalmol 2015;22:92–96.
   PubMedGoogle Scholar
• Bronsard A, Geneau R, Shirima S, et al. Why are children brought late for cataract surgery? Qualitative findings from Tanzania. Ophthalmic Epidemiol 2008;15:383–388.
   PubMed Web of Science ®Google Scholar
• Msukwa G, Njuguna M, Tumwesigye C, et al. Cataract in children attending schools for the blind and resource centers in eastern Africa. Ophthalmology 2009;116:1009–1012.
   PubMed Web of Science ®Google Scholar
• Gilbert C, Foster A. Childhood blindness in the context of VISION 2020–the right to sight. Bull World Health Organ 2001;79:227–232.
   PubMed Web of Science ®Google Scholar
• Gogate P, Kalua K, Courtright P. Blindness in childhood in developing countries: time for a reassessment? PLoS Med 2009;6:e1000177.
   PubMed Web of Science ®Google Scholar
• Muhit MA, Shah SP, Gilbert CE, et al. The key informant method: a novel means of ascertaining blind children in Bangladesh. Br J Ophthalmol 2007;91:995–999.
   PubMed Web of Science ®Google Scholar
• Candidate No: 490258, Kerkulas J. Estimating the magnitude and causes of childhood blindness in Nimba County, Liberia using the key informant method. London: London School of Hygiene and Tropical Medicine, 2009.
   Google Scholar
• Kalua K, Ng’ongola RT, Mbewe F, et al. Using primary health care (PHC) workers and key informants for community based detection of blindness in children in Southern Malawi. Human Resour Health 2012;10:37.
   PubMed Web of Science ®Google Scholar
• EPPI-Centre. EPPI-Centre Methods for Conducting Systematic Reviews. London: EPPI-Centre, Social Science Research Unit, Institute of Education, University of London, 2010.
   Google Scholar
• Jackson N, Waters E. The challenges of systematically reviewing public health interventions. J Public Health (Oxf) 2004;26:303–307.
   PubMed Web of Science ®Google Scholar
• Thorburn MJ, Desai P, Durkin M. A comparison of efficacy of the key informant and community survey methods in the identification of childhood disability in Jamaica. Ann Epidemiol 1991;1:255–261.
   PubMedGoogle Scholar
• Shija F, Shirima S, Lewallen S, et al. Comparing key informants to health workers in identifying children in need of surgical eye care services. Intl Health 2012;4:1–3.
   PubMed Web of Science ®Google Scholar
• Boye J. Validating key informant method in detecting blind children in Ghana. Comm Eye Health/Intl Centre Eye Health 2005;18:131.
   Google Scholar
• Candidate No: 100917. Childhood blindness and its impact: key informant method in Bulambuli district, Eastern Uganda. London: London School of Hygiene and Tropical Medicine, 2011.
   Google Scholar
• Candidate No: 105627. Childhood blindness: magnitude and Causes of blindness/severe visual impairment in Eastern Sierra Leone: Key informant method. London: London School of Hygiene and Tropical Medicine, 2012.
   Google Scholar
• Duke R, Ameh S, Nwagbara E, et al. Key informant perceptions of vision loss in children and implications for their training. Nigerian J Ophthalmol 2014;22:27–29.
   Google Scholar
• Duke R, Otong E, Iso M, et al. Using key informants to estimate prevalence of severe visual impairment and blindness in children in Cross River State, Nigeria. J AAPOS 2013;17:381–384.
   PubMed Web of Science ®Google Scholar
• Kalua K, Patel D, Muhit M, et al. Causes of blindness among children identified through village key informants in Malawi. Can J Ophthalmol 2008;43:425–427.
   PubMed Web of Science ®Google Scholar
• Kalua K, Patel D, Muhit M, et al. Productivity of key informants for identifying blind children: evidence from a pilot study in Malawi. Eye (London, England) 2009;23:7–9.
   PubMed Web of Science ®Google Scholar
• Mackey S, Murthy GV, Muhit MA, et al. Validation of the key informant method to identify children with disabilities: methods and results from a pilot study in Bangladesh. J Trop Pediatr 2012;58:269–274.
   PubMed Web of Science ®Google Scholar
• Muhit MA, Shah SP, Gilbert CE, et al. Causes of severe visual impairment and blindness in Bangladesh: a study of 1935 children. Br J Ophthalmol 2007;91:1000–1004.
   PubMed Web of Science ®Google Scholar
• Murthy GV, Mactaggart I, Mohammad M, et al. Assessing the prevalence of sensory and motor impairments in childhood in Bangladesh using key informants. Arch Dis Childhood 2014;99:1103–1108.
   PubMed Web of Science ®Google Scholar
• Candidate No. 105861. Prevalence and causes of childhood blindness using key informants method and situational analysis of pediatric eye services in Jakarta. London: London School of Hygiene and Tropical Medicine, 2012.
   Google Scholar
• Bulgan T, Gilbert CE. Prevalence and causes of severe visual impairment and blindness in children in Mongolia. Ophthalmic Epidemiol 2002;9:271–281.
   PubMed Web of Science ®Google Scholar
• Cama AT, Sikivou BT, Keeffe JE. Childhood visual impairment in Fiji. Arch Ophthalmol 2010;128:608–612.
   PubMedGoogle Scholar
• Muhammad N, Maishanu NM, Jabo AM, et al. Tracing children with blindness and visual impairment using the key informant survey in a district of north-Western Nigeria. Middle East Afr J Ophthalmol 2010;17:330–334.
   PubMedGoogle Scholar
• Razavi H, Kuper H, Rezvan F, et al. Prevalence and causes of severe visual impairment and blindness among children in the Lorestan province of Iran, using the key informant method. Ophthalmic Epidemiol 2010;17:95–102.
   PubMed Web of Science ®Google Scholar
• Xiao B, Fan J, Deng Y, et al. Using key informant method to assess the prevalence and causes of childhood blindness in Xiu’shui County, Jiangxi Province, Southeast China. Ophthalmic Epidemiol 2011;18:30–35.
   PubMed Web of Science ®Google Scholar
• Candidate No: 471909 (Parkar). Evaluating the role of key informants to identify blind/SVI children in Pune slums. London: London School of Hygiene and Tropical Medicine, 2007.
   Google Scholar
• Candidate No: 476745. Causes of childhood blindness in Zimbabwe: a comparison between blind school and key informant technique. London: London School of Hygiene and Tropical Medicine, 2007.
   Google Scholar
• Candidate No: 490196, Demissie BS. Magnitude and causes of childhood blindness and severe visual impairment in Sekoru District of Jimma Zone, South West Ethiopia: The Key Informant Method. London: London School of Hygiene and Tropical Medicine, 2009.
   Google Scholar
• Demissie BS, Solomon AW. Magnitude and causes of childhood blindness and severe visual impairment in Sekoru District, Southwest Ethiopia: a survey using the key informant method. Trans Roy Soc Trop Med Hygiene 2011;105:507–511.
   PubMed Web of Science ®Google Scholar
• Candidate No: 490338 (Xian). Using key informant method to detect childhood blindness & severe visual impairment in Xiu’shui County, Jiangxi Province, South East of China. London: London School of Hygiene and Tropical Medicine, 2009.
   Google Scholar
• Duke R, Ameh S, Nwagbara E, et al. Challenges faced by key informants practicing case finding for vision loss in children: the experience in Cross River State, Nigeria. Intl Health 2013;5:259–265.
   PubMed Web of Science ®Google Scholar
• Parkar TH. Evaluating the role of Anganwadi workers as key informants to identify blind children in Pune, India. Comm Eye Health/Intl Centre Eye Health 2007;20:72.
   PubMedGoogle Scholar
• Shirima S, Lewallen S, Kabona G, et al. Estimating numbers of blind children for planning services: findings in Kilimanjaro, Tanzania. Br J Ophthalmol 2009;93:1560–1562.
   PubMed Web of Science ®Google Scholar
• Kalua K. Use of key informants in determining the magnitude and causes of childhood blindness in Chikwawa district, southern Malawi. Comm Eye Health/Intl Centre Eye Health 2007;20:8.
   PubMedGoogle Scholar
• Candidate No: 6165 (Kalua). Use of key informants in determining the magnitude and causes of childhood blindness in Chikwawa district, southern Malawi. London: London School of Hygiene and Tropical Medicine, 2006.
   Google Scholar
• Candidate No: 480517, (Razavi). Prevalence and causes of severe visual impairment and blindness among children in the Lorestan province of Iran, using the key informant method. London: London School of Hygiene and Tropical Medicine, 2006.
   Google Scholar
• Gilbert C, Foster A. Childhood blindness in the context of VISION 2020–the right to sight. Bull World Health Organ 2001;79:227–232.
   PubMed Web of Science ®Google Scholar
• Gogate P, Kalua K, Courtright P. Blindness in childhood in developing countries: time for a reassessment? PLoS Med 2009; 6:e1000177.
   PubMed Web of Science ®Google Scholar