{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,20]],"date-time":"2026-03-20T08:50:40Z","timestamp":1773996640253,"version":"3.50.1"},"reference-count":29,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2025,4,30]],"date-time":"2025-04-30T00:00:00Z","timestamp":1745971200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Health Science Reports"],"published-print":{"date-parts":[[2025,5]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background and Aims<\/jats:title>\n                    <jats:p>Inaccurate coding of small for gestational age (SGA) infants in routinely collected health data has implications for research based on those data. We aimed to estimate the sensitivity and specificity of coded SGA diagnoses in New Zealand's routinely collected hospitalisation and mortality data, and determine whether sensitivity and specificity varied by infant, pregnancy, and maternal characteristics.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We estimated birthweight centiles of live and stillborn infants delivered in New Zealand between 2005 and 2020 using the Fenton Population Reference Calculator and the GROW Customised Bulk Centile Calculator (New Zealand version); values of the relevant variables (including gestational age, birthweight, infant sex, and others) were sourced from routinely collected national health data. We compared the SGA status derived from the calculators with coded SGA diagnoses (ICD\u201010\u2010AM P051) in hospitalisation and mortality data. We estimated sensitivity and specificity ratios comparing coded diagnoses with each of the birthweight calculators using a generalised linear model, adjusting for infant, pregnancy, and maternal characteristics.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>This analysis included 887,871 infants, with 15,850 (1.8%) having a coded SGA diagnosis. By contrast, the number and proportion of babies classified as SGA using the Fenton and GROW calculators were 80,541 (9.1%) and 138,866 (15.6%), respectively. Overall, compared with the Fenton calculator, the sensitivity of coded SGA diagnoses was 13.1% (specificity 99.3%). Compared with the GROW calculator, the sensitivity was 9.8% (specificity 99.7%).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>In New Zealand, population\u2010level research involving SGA diagnoses should derive birthweight centiles using an appropriate calculator instead of using ICD\u201010\u2010AM coded diagnoses.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/hsr2.70610","type":"journal-article","created":{"date-parts":[[2025,4,30]],"date-time":"2025-04-30T19:15:37Z","timestamp":1746040537000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Small for Gestational Age Coded Diagnoses in Aotearoa New Zealand's Administrative Health Datasets: A Validation Study"],"prefix":"10.1002","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0728-4598","authenticated-orcid":false,"given":"Mei\u2010Ling","family":"Blank","sequence":"first","affiliation":[{"name":"Department of Preventive and Social Medicine (Te Tari Hauora T\u016bmatanui) University of Otago (\u014ct\u0101kou Whakaihu Waka) Dunedin New Zealand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sarah","family":"Donald","sequence":"additional","affiliation":[{"name":"Department of Preventive and Social Medicine (Te Tari Hauora T\u016bmatanui) University of Otago (\u014ct\u0101kou Whakaihu Waka) Dunedin New Zealand"},{"name":"Pharmacoepidemiology Research Network University of Otago (\u014ct\u0101kou Whakaihu Waka) Dunedin New Zealand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lianne","family":"Parkin","sequence":"additional","affiliation":[{"name":"Department of Preventive and Social Medicine (Te Tari Hauora T\u016bmatanui) University of Otago (\u014ct\u0101kou Whakaihu Waka) Dunedin New Zealand"},{"name":"Pharmacoepidemiology Research Network University of Otago (\u014ct\u0101kou Whakaihu Waka) Dunedin New Zealand"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,4,30]]},"reference":[{"key":"e_1_2_13_2_1","volume-title":"Small for Gestational Age and Fetal Growth Restriction in Aotearoa New Zealand He Aratohu Ritenga Haumanu m\u014d te T\u014dhuatanga K\u014dpiri me te Pakupaku Rawa. A clinical Practice Guideline: Summary of Recommendations","author":"Te Whatu Ora \u2010 Health New Zealand","year":"2023"},{"key":"e_1_2_13_3_1","doi-asserted-by":"publisher","DOI":"10.1055\/s-0036-1586502"},{"key":"e_1_2_13_4_1","doi-asserted-by":"publisher","DOI":"10.1210\/er.2018-00083"},{"key":"e_1_2_13_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.11112"},{"key":"e_1_2_13_6_1","doi-asserted-by":"publisher","DOI":"10.1038\/nrendo.2016.127"},{"key":"e_1_2_13_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/ajo.12016"},{"key":"e_1_2_13_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1440-1754.2012.02534.x"},{"key":"e_1_2_13_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2017.12.004"},{"key":"e_1_2_13_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2019.02.060"},{"key":"e_1_2_13_11_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41372-020-0631-3"},{"key":"e_1_2_13_12_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1479-828X.2004.00272.x"},{"key":"e_1_2_13_13_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.2012.03313.x"},{"key":"e_1_2_13_14_1","unstructured":"J.GardosiandA.Francis.Customised Weight Centile Calculator. GROW v6.7.8 (NZ). Gestation Network 2016 https:\/\/www.gestation.net\/index.htm."},{"key":"e_1_2_13_15_1","unstructured":"Perinatal and Maternal Mortality Review Committee. Perinatal and Maternal Mortality in New Zealand 2006 \u2010 Second Report to the Minister of Health July 2007 to June 2008. Wellington: Ministry of Health 2009 https:\/\/ourarchive.otago.ac.nz\/esploro\/outputs\/report\/Perinatal-and-Maternal-Mortality-in-New\/9926480009801891."},{"key":"e_1_2_13_16_1","volume-title":"Guideline for the Management of Suspected Small for Gestational Age Singleton Pregnancies and Infants After 34 Weeks\u2019 Gestation","author":"New Zealand Maternal Fetal Medicine Network","year":"2014"},{"key":"e_1_2_13_17_1","doi-asserted-by":"publisher","DOI":"10.1111\/ajo.13299"},{"key":"e_1_2_13_18_1","doi-asserted-by":"publisher","DOI":"10.1111\/ajo.13283"},{"key":"e_1_2_13_19_1","doi-asserted-by":"publisher","DOI":"10.1002\/pds.4671"},{"key":"e_1_2_13_20_1","unstructured":"S.Donald K.Sharples D.Barson et al. Exposure to SSRI and SNRI Antidepressants During late Pregnancy and the Risk of Small for Gestational Age infants. 7th Pharmacoepidemiology Research Network Symposium. Online presentation 2022. Abstract available athttps:\/\/www.otago.ac.nz\/__data\/assets\/pdf_file\/0021\/326910\/7th-pharmacoepidemiology-research-network-symposium-abstracts-0237211.pdf."},{"key":"e_1_2_13_21_1","unstructured":"T. R.Fenton. Fenton Preterm Growth Chart site Calgary University of Calgary accessed August 3 2024 https:\/\/ucalgary.ca\/resource\/preterm-growth-chart\/calculators-apps."},{"key":"e_1_2_13_22_1","volume-title":"HISO 10001:2017 Ethnicity Data Protocols","author":"Ministry of Health","year":"2017"},{"key":"e_1_2_13_23_1","unstructured":"Te Whatu Ora \u2010 Health New Zealand. Report on maternity web tool 2024 accessed February 2 2025 https:\/\/www.tewhatuora.govt.nz\/for-health-professionals\/data-and-statistics\/maternity\/report-on-maternity-web-tool#:~:text=Most%20people%20gave%20birth%20at to%202020%20and%202021%20percentages."},{"key":"e_1_2_13_24_1","volume-title":"National Minimum Dataset (Hospital Events) Data Dictionary","author":"Ministry of Health","year":"2021"},{"key":"e_1_2_13_25_1","volume-title":"Mortality Collection Data Dictionary","author":"Ministry of Health","year":"2021"},{"key":"e_1_2_13_26_1","unstructured":"J.Atkinson C.Salmond andP.CramptonNZDep2018 Index of Deprivation Interim Research Report December 2019. Te Whanganui\u2010a\u2010Tara\/P\u014dneke: Te Whare W\u0101nanga o \u014ct\u0101kou \u2010 \u014ct\u0101kou Whakaihu Waka 2019."},{"key":"e_1_2_13_27_1","volume-title":"Stata Statistical Software: Release 17","author":"StataCorp","year":"2021"},{"key":"e_1_2_13_28_1","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.h5527"},{"key":"e_1_2_13_29_1","doi-asserted-by":"publisher","DOI":"10.1002\/pds.3740"},{"key":"e_1_2_13_30_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2007.06.038"}],"container-title":["Health Science Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/hsr2.70610","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,11,21]],"date-time":"2025-11-21T12:04:50Z","timestamp":1763726690000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/hsr2.70610"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,4,30]]},"references-count":29,"journal-issue":{"issue":"5","published-print":{"date-parts":[[2025,5]]}},"alternative-id":["10.1002\/hsr2.70610"],"URL":"https:\/\/doi.org\/10.1002\/hsr2.70610","archive":["Portico"],"relation":{},"ISSN":["2398-8835","2398-8835"],"issn-type":[{"value":"2398-8835","type":"print"},{"value":"2398-8835","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,4,30]]},"assertion":[{"value":"2024-10-06","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-03-11","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-04-30","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"e70610"}}