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Less is known about school grades of those born preterm in mainstream education (ME), and how these grades predict later educational attainment. This population-based register-linkage study assessed (1) attendance in SE, and then focused on those in ME by assessing (2) school grades at 16\u00a0year, (3) completed educational level at 25\u00a0year, and (4) school grades as predictors for completed education by gestational age (GA) with full-term birth (39\u201341 completed weeks) as reference. The sample comprised 223,744 individuals (10,521 preterm, 4.7%) born in Finland (1\/1987\u20139\/1990). Of the sample, 4.9% attended SE. Those born preterm had up to 5.5-fold rates for SE. In ME, those born extremely preterm (EPT) had marginally lower mathematics grades compared with full-term counterparts, whilst those born late preterm or early term had slightly higher grades. Those born EPT or very preterm had lower physical education grades in ME. However, the minor differences in school grades according to GA appear not to translate into educational differences in young adulthood. The associations between school grades at 16\u00a0year and completed education at 25\u00a0year did not vary by GA.<\/jats:p>","DOI":"10.1038\/s41598-022-27295-4","type":"journal-article","created":{"date-parts":[[2023,1,5]],"date-time":"2023-01-05T13:04:24Z","timestamp":1672923864000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["School grades and educational attainments of adolescents and young adults born preterm"],"prefix":"10.1038","volume":"13","author":[{"given":"Suvi","family":"Alenius","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eero","family":"Kajantie","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Reijo","family":"Sund","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Markku","family":"Nurhonen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peija","family":"Haaramo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pieta","family":"N\u00e4s\u00e4nen-Gilmore","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sakari","family":"Lemola","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Katri","family":"R\u00e4ikk\u00f6nen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel D.","family":"Schnitzlein","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dieter","family":"Wolke","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mika","family":"Gissler","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Petteri","family":"Hovi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2023,1,5]]},"reference":[{"key":"27295_CR1","doi-asserted-by":"publisher","first-page":"e37","DOI":"10.1016\/S2214-109X(18)30451-0","volume":"7","author":"S Chawanpaiboon","year":"2019","unstructured":"Chawanpaiboon, S. et al. 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