{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,14]],"date-time":"2025-05-14T01:56:38Z","timestamp":1747187798304,"version":"3.40.5"},"reference-count":28,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2022,12,13]],"date-time":"2022-12-13T00:00:00Z","timestamp":1670889600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"DOI":"10.13039\/100009633","name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development","doi-asserted-by":"publisher","award":["1R03HD099241"],"award-info":[{"award-number":["1R03HD099241"]}],"id":[{"id":"10.13039\/100009633","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Paediatric Perinatal Epid"],"published-print":{"date-parts":[[2023,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Short interpregnancy interval has been associated with increased risk of preterm delivery; recent studies employing within\u2010sibship designs suggest that this risk may be exaggerated. There are unresolved issues regarding properties of this design.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objectives<\/jats:title><jats:p>To compare directly the results, for short intervals, of between\u2010person and within\u2010sibship analyses when applied to the same target population.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Cross\u2010sectional data are from the National Survey of Family Growth, a statistically representative survey of women and men in the USA, 2006\u20132015. Participants provided a complete pregnancy history including outcome, duration and ending date, enabling calculation of interval. Conventional analysis employed log\u2010linear regression, controlling survey design, early life events, demographic variables, pregnancy intendedness, breastfeeding of the previous birth and obstetric history. Within\u2010sibship analyses, utilising conditional log\u2010linear regression, controlled the same variables, except those remaining static within each participant.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Among participants with at least three live\u2010 or stillbirths, the percentage of pregnancies in each interval, and the percent of deliveries that were preterm following that interval were 9.2%, 14.6% for &lt;6, and 14.7%, 15.4% for 6\u201311, versus 12.2%, 14.7% for 18\u201323\u2009months. Among participants with at least three live\u2010 or stillborn infants, those in the within\u2010sibship analysis had a higher risk profile than comparably parous, ineligible participants. In a between\u2010participant analysis, among those included in within\u2010sibship models, the adjusted risk ratios (vs 18\u201323\u2009months) for preterm delivery for intervals &lt;6 and 6\u201311\u2009months were 0.74 (95% CI 0.63, 0.88) and 0.85 (95% CI 0.74, 0.98). The corresponding risk ratios were 0.56 (95% CI 0.14, 2.30) and 0.49 (95% CI 0.13, 1.80) for those ineligible for the within\u2010sibship models.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>When comparable analyses were employed, the association between interval and preterm delivery was similar between participants included in the within\u2010sibship analysis and those ineligible for the within\u2010sibship analysis, but differed from those in the full cohort, perhaps due to different target populations.<\/jats:p><\/jats:sec>","DOI":"10.1111\/ppe.12946","type":"journal-article","created":{"date-parts":[[2022,12,13]],"date-time":"2022-12-13T11:23:34Z","timestamp":1670930614000},"page":"365-375","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Interpregnancy interval and preterm delivery: An empirical comparison of between\u2010persons and within\u2010sibship designs"],"prefix":"10.1111","volume":"37","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0513-4975","authenticated-orcid":false,"given":"Mark A.","family":"Klebanoff","sequence":"first","affiliation":[{"name":"Center for Perinatal Research The Abigail Wexner Research Institute, Nationwide Children's Hospital  Columbus Ohio USA"},{"name":"Departments of Pediatrics and Obstetrics and Gynecology The Ohio State University College of Medicine  Columbus Ohio USA"},{"name":"Division of Epidemiology The Ohio State University College of Public Health  Columbus Ohio USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8977-6443","authenticated-orcid":false,"given":"Erinn M.","family":"Hade","sequence":"additional","affiliation":[{"name":"Department of Population Health, Division of Biostatistics New York University Grossman School of Medicine  New York New York USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2022,12,13]]},"reference":[{"volume-title":"Infant Mortality\u2010 Results of a Field Study in Gary, Ind Based on Births in One Year [1916]","year":"1923","author":"Hughes E.","key":"e_1_2_11_2_1"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/ppe.12503"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1001\/jama.295.15.1809"},{"volume-title":"Report of a WHO Technical Consultation on Birth Spacing, Geneva Switzerland 13\u201315 June 2005","year":"2006","author":"Marston C","key":"e_1_2_11_5_1"},{"key":"e_1_2_11_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/ppe.12512"},{"key":"e_1_2_11_7_1","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.g4333"},{"key":"e_1_2_11_8_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0000000000002358"},{"key":"e_1_2_11_9_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0000000000001891"},{"key":"e_1_2_11_10_1","doi-asserted-by":"publisher","DOI":"10.1111\/1471-0528.14165"},{"key":"e_1_2_11_11_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0255000"},{"key":"e_1_2_11_12_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41372-019-0402-1"},{"key":"e_1_2_11_13_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0000000000001913"},{"key":"e_1_2_11_14_1","doi-asserted-by":"publisher","DOI":"10.1097\/EDE.0b013e31825fa230"},{"key":"e_1_2_11_15_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10654-022-00844-x"},{"key":"e_1_2_11_16_1","doi-asserted-by":"publisher","DOI":"10.1097\/EDE.0000000000000541"},{"key":"e_1_2_11_17_1","unstructured":"Centers for Disease Control and Prevention (U.S).About the National Survey of Family Growth.2022; Available from:https:\/\/www.cdc.gov\/nchs\/nsfg\/about_nsfg.htm"},{"key":"e_1_2_11_18_1","doi-asserted-by":"publisher","DOI":"10.1111\/ppe.12716"},{"key":"e_1_2_11_19_1","doi-asserted-by":"publisher","DOI":"10.1111\/ppe.12458"},{"key":"e_1_2_11_20_1","doi-asserted-by":"publisher","DOI":"10.1111\/ppe.12668"},{"key":"e_1_2_11_21_1","doi-asserted-by":"publisher","DOI":"10.2307\/2531734"},{"key":"e_1_2_11_22_1","doi-asserted-by":"publisher","DOI":"10.1097\/EDE.0b013e3181e09b0b"},{"key":"e_1_2_11_23_1","doi-asserted-by":"publisher","DOI":"10.1093\/aje\/kwn411"},{"key":"e_1_2_11_24_1","doi-asserted-by":"publisher","DOI":"10.1093\/ije\/dyr218"},{"key":"e_1_2_11_25_1","doi-asserted-by":"publisher","DOI":"10.1515\/em-2013-0005"},{"key":"e_1_2_11_26_1","first-page":"221","article-title":"Interpregnancy interval following miscarriage and adverse pregnancy outcomes: systematic review and meta\u2010analysis","volume":"23","author":"Kangatharan C","year":"2017","journal-title":"Hum Reprod Update"},{"key":"e_1_2_11_27_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(18)32266-9"},{"key":"e_1_2_11_28_1","unstructured":"MichasF.Percentage of preterm births in the United States from 1990 to 2020.2022. Available from:https:\/\/www.statista.com\/statistics\/276075\/us\u2010preterm\u2010birth\u2010percentage\/"},{"key":"e_1_2_11_29_1","doi-asserted-by":"publisher","DOI":"10.1111\/1471-0528.17223"}],"container-title":["Paediatric and Perinatal Epidemiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/ppe.12946","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1111\/ppe.12946","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/ppe.12946","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,8,18]],"date-time":"2023-08-18T05:10:11Z","timestamp":1692335411000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/ppe.12946"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,12,13]]},"references-count":28,"journal-issue":{"issue":"5","published-print":{"date-parts":[[2023,7]]}},"alternative-id":["10.1111\/ppe.12946"],"URL":"https:\/\/doi.org\/10.1111\/ppe.12946","archive":["Portico"],"relation":{},"ISSN":["0269-5022","1365-3016"],"issn-type":[{"type":"print","value":"0269-5022"},{"type":"electronic","value":"1365-3016"}],"subject":[],"published":{"date-parts":[[2022,12,13]]},"assertion":[{"value":"2022-05-06","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2022-11-21","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2022-12-13","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}