Rob van Hest Capture-recapture Methods in Surveillance - RePub ...
Rob van Hest Capture-recapture Methods in Surveillance - RePub ...
Rob van Hest Capture-recapture Methods in Surveillance - RePub ...
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Chapter 9<br />
Abstract<br />
Truncated models are <strong>in</strong>direct methods to estimate the size of a hidden population which,<br />
<strong>in</strong> contrast to the capture-<strong>recapture</strong> method, can be used on a s<strong>in</strong>gle <strong>in</strong>formation source.<br />
We estimated the coverage of a tuberculosis screen<strong>in</strong>g programme among illicit drug<br />
users and homeless persons with a mobile digital X-ray unit between 1 January 2003 and<br />
31 December 2005 <strong>in</strong> Rotterdam, the Netherlands, us<strong>in</strong>g truncated models. The screen<strong>in</strong>g<br />
programme reached approximately two-third of the estimated target population at least<br />
once yearly. The <strong>in</strong>tended coverage (at least two chest X-rays per person per year) was<br />
approximately 23%. We conclude that simple truncated models can be used relatively<br />
easily on available s<strong>in</strong>gle source rout<strong>in</strong>e data to estimate the size of a population of illicit<br />
drug users and homeless persons. We assume the most likely overall bias <strong>in</strong> this study to<br />
be overestimation and therefore the coverage of the targeted mobile tuberculosis<br />
screen<strong>in</strong>g programme would be higher.<br />
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