{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T22:55:27Z","timestamp":1792191327827,"version":"4.4.0"},"reference-count":51,"publisher":"Springer Science and Business Media LLC","issue":"1","content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Int J Health Geogr"],"published-print":{"date-parts":[[2010,12]]},"abstract":"<jats:title>Abstract<\/jats:title>\n          <jats:sec>\n            <jats:title>Background<\/jats:title>\n            <jats:p>Irregularly shaped spatial clusters are difficult to delineate. A cluster found by an algorithm often spreads through large portions of the map, impacting its geographical meaning. Penalized likelihood methods for Kulldorff's spatial scan statistics have been used to control the excessive freedom of the shape of clusters. Penalty functions based on cluster geometry and non-connectivity have been proposed recently. Another approach involves the use of a multi-objective algorithm to maximize two objectives: the spatial scan statistics and the geometric penalty function.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results &amp; Discussion<\/jats:title>\n            <jats:p>We present a novel scan statistic algorithm employing a function based on the graph topology to penalize the presence of under-populated disconnection nodes in candidate clusters, the <jats:italic>disconnection nodes cohesion function<\/jats:italic>. A disconnection node is defined as a region within a cluster, such that its removal disconnects the cluster. By applying this function, the most geographically meaningful clusters are sifted through the immense set of possible irregularly shaped candidate cluster solutions. To evaluate the statistical significance of solutions for multi-objective scans, a statistical approach based on the concept of attainment function is used. In this paper we compared different penalized likelihoods employing the geometric and non-connectivity regularity functions and the novel disconnection nodes cohesion function. We also build multi-objective scans using those three functions and compare them with the previous penalized likelihood scans. An application is presented using comprehensive state-wide data for Chagas' disease in puerperal women in Minas Gerais state, Brazil.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusions<\/jats:title>\n            <jats:p>We show that, compared to the other single-objective algorithms, multi-objective scans present better performance, regarding power, sensitivity and positive predicted value. The multi-objective non-connectivity scan is faster and better suited for the detection of moderately irregularly shaped clusters. The multi-objective cohesion scan is most effective for the detection of highly irregularly shaped clusters.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1186\/1476-072x-9-55","type":"journal-article","created":{"date-parts":[[2010,10,29]],"date-time":"2010-10-29T18:14:26Z","timestamp":1288376066000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":37,"title":["Penalized likelihood and multi-objective spatial scans for the detection and inference of irregular clusters"],"prefix":"10.1186","volume":"9","author":[{"given":"Andr\u00e9 LF","family":"Can\u00e7ado","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anderson R","family":"Duarte","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luiz H","family":"Duczmal","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sabino J","family":"Ferreira","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carlos M","family":"Fonseca","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eliane CDM","family":"Gontijo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2010,10,29]]},"reference":[{"key":"388_CR1","volume-title":"Disease Mapping and Risk Assessment for Public Health","author":"A Lawson","year":"1999","unstructured":"Lawson A, Biggeri A, BVohning D, Lesare E, Viel JF, Bertollini R: Disease Mapping and Risk Assessment for Public Health. 1999, London: Wiley"},{"key":"388_CR2","doi-asserted-by":"publisher","first-page":"143","DOI":"10.1093\/oxfordjournals.epirev.a017993","volume":"21","author":"DA Moore","year":"1999","unstructured":"Moore DA, Carpenter TE: Spatial analytical methods and geographic information systems: use in health research and epidemiology. 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