Negative Adaptive Cluster Double Sampling

2021 ◽  
pp. 229-240
Author(s):  
Raosaheb Latpate ◽  
Jayant Kshirsagar ◽  
Vinod Kumar Gupta ◽  
Girish Chandra
Keyword(s):  
Double Sampling

scholarly journals A semiparametric method for the analysis of outcomes during a gap in HIV care under incomplete outcome ascertainment

2020 ◽  
Vol 12 (s1) ◽  
Author(s):  
Giorgos Bakoyannis ◽  
Lameck Diero ◽  
Ann Mwangi ◽  
Kara K. Wools-Kaloustian ◽  
Constantin T. Yiannoutsos
Keyword(s):  
Electronic Health Record ◽  
East Africa ◽  
Sub Saharan Africa ◽  
Hiv Care ◽  
Double Sampling ◽  
Health Record ◽  
Electronic Health Record Data ◽  
Semiparametric Method ◽  
Program Construction ◽  
Electronic Health

AbstractObjectivesEstimation of the cascade of HIV care is essential for evaluating care and treatment programs, informing policy makers and assessing targets such as 90-90-90. A challenge to estimating the cascade based on electronic health record concerns patients “churning” in and out of care. Correctly estimating this dynamic phenomenon in resource-limited settings, such as those found in sub-Saharan Africa, is challenging because of the significant death under-reporting. An approach to partially recover information on the unobserved deaths is a double-sampling design, where a small subset of individuals with a missed clinic visit is intensively outreached in the community to actively ascertain their vital status. This approach has been adopted in several programs within the East Africa regional IeDEA consortium, the context of our motivating study. The objective of this paper is to propose a semiparametric method for the analysis of competing risks data with incomplete outcome ascertainment.MethodsBased on data from double-sampling designs, we propose a semiparametric inverse probability weighted estimator of key outcomes during a gap in care, which are crucial pieces of the care cascade puzzle.ResultsSimulation studies suggest that the proposed estimators provide valid estimates in settings with incomplete outcome ascertainment under a set of realistic assumptions. These studies also illustrate that a naïve complete-case analysis can provide seriously biased estimates. The methodology is applied to electronic health record data from the East Africa IeDEA Consortium to estimate death and return to care during a gap in care.ConclusionsThe proposed methodology provides a robust approach for valid inferences about return to care and death during a gap in care, in settings with death under-reporting. Ultimately, the resulting estimates will have significant consequences on program construction, resource allocation, policy and decision making at the highest levels.

scholarly journals A Double Sampling Scheme for Process Mean Monitoring

IEEE Access ◽  
2017 ◽  
Vol 5 ◽  
pp. 6668-6677 ◽  
Author(s):  
Su-Fen Yang ◽  
Sin-Hong Wu
Keyword(s):  
Sampling Scheme ◽  
Double Sampling ◽  
Process Mean

Predictive Estimation in Double Sampling Procedures

1988 ◽  
Vol 42 (3) ◽  
pp. 184-186
Author(s):  
M. C. Agrawal ◽  
Nirmal Jain
Keyword(s):  
Double Sampling ◽  
Sampling Procedures
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