Lot Quality Assurance Sampling to Monitor Supplemental Immunization Activity Quality: An Essential Tool for Improving Performance in Polio Endemic Countries

Author: Brown AE1, Okayasu H1, Nzioki MM2, Wadood MZ3, Chabot-Couture G4, Quddus A5, Walker G1, Sutter RW1.


Monitoring the quality of supplementary immunization activities (SIAs) is a key tool for polio eradication. Regular monitoring data, however, are often unreliable, showing high coverage levels in virtually all areas, including those with ongoing virus circulation. To address this challenge, lot quality assurance sampling (LQAS) was introduced in 2009 as an additional tool to monitor SIA quality. Now used in 8 countries, LQAS provides a number of programmatic benefits: identifying areas of weak coverage quality with statistical reliability, differentiating areas of varying coverage with greater precision, and allowing for trend analysis of campaign quality. LQAS also accommodates changes to survey format, interpretation thresholds, evaluations of sample size, and data collection through mobile phones to improve timeliness of reporting and allow for visualization of campaign quality. LQAS becomes increasingly important to address remaining gaps in SIA quality


Type Journal article
Language English
Country Not Specified
PubMed URL http://www.ncbi.nlm.nih.gov/pubmed/25316852
Journal Journal of Infectious Diseases
Volume 2014 Nov 1;210 Suppl 1:S333-40. doi: 10.1093/infdis/jit816.
Year 2014
Added by Hemanthi
Added on 28 April 2017 07:41:11
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