{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,9]],"date-time":"2026-07-09T13:46:50Z","timestamp":1783604810341,"version":"3.55.0"},"reference-count":32,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2022,9,1]],"date-time":"2022-09-01T00:00:00Z","timestamp":1661990400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Ultrasound in Obstet &amp;amp; Gyne"],"published-print":{"date-parts":[[2022,9]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To determine the extent to which the detection rate of small\u2010for\u2010gestational age (SGA) and large\u2010for\u2010gestational age (LGA) at birth is influenced by the use of different combinations of estimated\u2010fetal\u2010weight (EFW) and birth\u2010weight (BW) charts.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This was a cohort study of all pregnant women with a singleton term birth receiving care in a university hospital during a 3\u2010year period. All participants underwent a universal 36\u2010week ultrasound scan for EFW measurement and had BW recorded at delivery. Five different reference charts were used for EFW and BW centile calculation. Two\u2010by\u2010two contingency tables were constructed using EFW as the screening test variable and BW as the outcome variable in order to calculate sensitivity, specificity, positive predictive value (PPV) and negative predictive value for all possible chart combinations.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The cohort included 17\u2009678 pregnancies. The sensitivity of EFW &lt;\u200910<jats:sup>th<\/jats:sup> centile for the detection of BW &lt;\u200910<jats:sup>th<\/jats:sup> centile ranged from 10.8% to 66.8% and the sensitivity of EFW &lt;\u20093<jats:sup>rd<\/jats:sup> centile for the detection of BW &lt;\u20093<jats:sup>rd<\/jats:sup> centile ranged from 4.1% to 66.8%, depending on the charts used. The sensitivity of EFW &gt;\u200990<jats:sup>th<\/jats:sup> centile for BW &gt;\u200990<jats:sup>th<\/jats:sup> centile ranged between 22.9% and 68.3%. When locally derived charts for EFW and BW were used, the sensitivity of detection of BW &lt;\u200910<jats:sup>th<\/jats:sup> centile using EFW &lt;\u200910<jats:sup>th<\/jats:sup> centile was 43.7% (PPV, 45.5%); for the detection of BW &lt;\u20093<jats:sup>rd<\/jats:sup> centile using EFW &lt;\u20093<jats:sup>rd<\/jats:sup> centile, the sensitivity was 25.6% (PPV, 26.7%) and, for the detection of BW &gt;\u200990<jats:sup>th<\/jats:sup> centile using EFW &gt;\u200990<jats:sup>th<\/jats:sup> centile, it was 49.6% (PPV, 49.0%).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Different combinations of EFW and BW charts can yield vastly different detection rates (sensitivity) in the same population cohort and time period. If SGA and LGA detection rates are to be used as a meaningful performance indicator, healthcare systems should follow a clear and predefined methodology that includes explicit definitions of common reference standards. \u00a9 2022 International Society of Ultrasound in Obstetrics and Gynecology.<\/jats:p><\/jats:sec>","DOI":"10.1002\/uog.24971","type":"journal-article","created":{"date-parts":[[2022,6,16]],"date-time":"2022-06-16T14:19:15Z","timestamp":1655389155000},"page":"373-380","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Detection of small\u2010 and large\u2010for\u2010gestational age using different combinations of prenatal and postnatal charts"],"prefix":"10.1002","volume":"60","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1609-3654","authenticated-orcid":false,"given":"S.","family":"Mathewlynn","sequence":"first","affiliation":[{"name":"Fetal Medicine Unit John Radcliffe Hospital  Oxford 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