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QingningZhou101222
(05 Oct 2022,
JenaAltstatt
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%HEAD{ NAME="Qingning Zhou, !PhD" AFFILIATION="Assistant Professor of Statistics</br>Dept. of Mathematics and Statistics, UNC Charlotte" TITLE="Two-phase sampling with interval-censored data" IMAGELINK="https://math.charlotte.edu/sites/math.charlotte.edu/files/styles/directory-list/public/fields/directory/field_directory_image/Qingning%20photo.jpg?itok=6j6FDuz7" }% Abstract: Epidemiologic studies and disease prevention trials often seek to relate an exposure variable to a failure time that suffers from interval-censoring. When the failure rate is low and the time intervals are wide, a large cohort is often required so as to yield reliable precision on the exposure-failure-time relationship. However, large cohort studies with simple random sampling could be prohibitive for investigators with limited budget, especially when the exposure variable is expensive to obtain. Alternative cost-effective sampling designs are thus desirable. We propose two-phase sampling designs with interval-censored data, where the phase II sample is enriched by selectively including more informative subjects based on the phase I information. We develop semiparametric inference procedures that properly handle interval-censoring, biased-sampling and missing data. We establish their large sample properties using empirical process theory and semiparametric theory. We also develop an R package that implements the proposed methods. %TAIL{DATE="12 October 2022"}% <!-- * Set HEAD = <div class="w3-card-2" id="task" style="max-width:750px; margin-left: 0px;"> <header class="w3-container w3-blue" style="padding:40px"><h1>Biostatistics Weekly Seminar</h1><br><h2 style="color:white;">%TITLE%<br><br>%NAME%<br>%AFFILIATION%</h2></header><div class="w3-container" style="padding:40px"><IMG SRC=%IMAGELINK% align="left" id="mug"/> * Set TAIL = <br><h3>Zoom Link to Follow<br>%DATE%<br>1:30pm</h3></div></div><br>[[%TOPIC%Itinerary][Speaker Itinerary]] --> <style> .w3-card-2,.w3-example{box-shadow:0 2px 4px 0 rgba(0,0,0,0.16),0 2px 10px 0 rgba(0,0,0,0.12)!important} .w3-blue,.w3-hover-blue:hover{color:#fff!important;background-color:#2196F3!important} .w3-container{padding:0.01em 16px} .foswikiTopic {font-family: 'Open Sans', sans-serif;} /* Removes location hierarchy (usually written in grey text) */ .patternHomePath {display:none;} /* Removes bar with edit and attach buttons and location hierarchy */ .patternTop{display:none;} h1, h2, h3, h4, h5, h6{font-family: 'Montserrat','Open Sans', sans-serif;font-weight:700;} h1, h2, h3, h4, h5, h6{color:#bf1735;} h1:first-of-type{color:#2a3e6e;margin-bottom:25px;margin-top:5px;} .foswikiImage{margin-left:-9px;} img#mug{padding-right: 40px; padding-bottom:25px; height:250px;} </style>
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Topic revision: r1 - 05 Oct 2022,
JenaAltstatt
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