Extending cluster lot quality assurance sampling designs for surveillance programs. 2014

Lauren Hund, and Marcello Pagano
Department of Family and Community Medicine, University of New Mexico, 2400 Tucker Avenue Northeast Albuquerque, NM 87131, U.S.A.

Lot quality assurance sampling (LQAS) has a long history of applications in industrial quality control. LQAS is frequently used for rapid surveillance in global health settings, with areas classified as poor or acceptable performance on the basis of the binary classification of an indicator. Historically, LQAS surveys have relied on simple random samples from the population; however, implementing two-stage cluster designs for surveillance sampling is often more cost-effective than simple random sampling. By applying survey sampling results to the binary classification procedure, we develop a simple and flexible nonparametric procedure to incorporate clustering effects into the LQAS sample design to appropriately inflate the sample size, accommodating finite numbers of clusters in the population when relevant. We use this framework to then discuss principled selection of survey design parameters in longitudinal surveillance programs. We apply this framework to design surveys to detect rises in malnutrition prevalence in nutrition surveillance programs in Kenya and South Sudan, accounting for clustering within villages. By combining historical information with data from previous surveys, we design surveys to detect spikes in the childhood malnutrition rate.

UI MeSH Term Description Entries
D011159 Population Surveillance Ongoing scrutiny of a population (general population, study population, target population, etc.), generally using methods distinguished by their practicability, uniformity, and frequently their rapidity, rather than by complete accuracy. Surveillance, Population
D011785 Quality Assurance, Health Care Activities and programs intended to assure or improve the quality of care in either a defined medical setting or a program. The concept includes the assessment or evaluation of the quality of care; identification of problems or shortcomings in the delivery of care; designing activities to overcome these deficiencies; and follow-up monitoring to ensure effectiveness of corrective steps. Quality Assessment, Health Care,Health Care Quality Assessment,Health Care Quality Assurance,Healthcare Quality Assessment,Healthcare Quality Assurance,Quality Assessment, Healthcare,Quality Assurance, Healthcare,Assessment, Healthcare Quality,Assessments, Healthcare Quality,Assurance, Healthcare Quality,Assurances, Healthcare Quality,Healthcare Quality Assessments,Healthcare Quality Assurances,Quality Assessments, Healthcare,Quality Assurances, Healthcare
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012494 Sampling Studies Studies in which a number of subjects are selected from all subjects in a defined population. Conclusions based on sample results may be attributed only to the population sampled. Probability Sample,Probability Samples,Sample, Probability,Samples, Probability,Sampling Study,Studies, Sampling,Study, Sampling
D016000 Cluster Analysis A set of statistical methods used to group variables or observations into strongly inter-related subgroups. In epidemiology, it may be used to analyze a closely grouped series of events or cases of disease or other health-related phenomenon with well-defined distribution patterns in relation to time or place or both. Clustering,Analyses, Cluster,Analysis, Cluster,Cluster Analyses,Clusterings
D019538 Health Care Surveys Statistical measures of utilization and other aspects of the provision of health care services including hospitalization and ambulatory care. Healthcare Surveys,National Ambulatory Medical Care Survey,National Hospital Discharge Survey,Care Survey, Health,Care Surveys, Health,Health Care Survey,Healthcare Survey,Survey, Health Care,Survey, Healthcare,Surveys, Health Care,Surveys, Healthcare

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