Gestational age and cognitive ability in early childhood: A population-based cohort study
Background Recent studies suggest that children born at late preterm (34-36 weeks gestation) and early term (37-38 weeks) may have poorer developmental outcomes than children born at full term (39-41 weeks). We examined how gestational age is related to cognitive ability in early childhood using the...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2013
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| _version_ | 1826296305460183040 |
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| author | Poulsen, G Wolke, D Kurinczuk, J Boyle, E Field, D Alfirevic, Z Quigley, M |
| author_facet | Poulsen, G Wolke, D Kurinczuk, J Boyle, E Field, D Alfirevic, Z Quigley, M |
| author_sort | Poulsen, G |
| collection | OXFORD |
| description | Background Recent studies suggest that children born at late preterm (34-36 weeks gestation) and early term (37-38 weeks) may have poorer developmental outcomes than children born at full term (39-41 weeks). We examined how gestational age is related to cognitive ability in early childhood using the UK Millennium Cohort Study. Methods Cognitive development was assessed using Bracken School Readiness Assessment at age 3 years, British Ability Scales II at ages 3, 5 and 7 years and Progress in Mathematics at age 7 years. Sample size varied according to outcome between 12 163 and 14 027. Each gestational age group was compared with the full-term group using differences in z-scores and risk ratios for scoring more than -1 SD below the mean. Results Children born at <32 weeks gestation scored lower (P < 0.05) than the full-term group on all scales with unadjusted z-score differences ranging between -0.8 to -0.2 SD. In all groups, there was an increased risk (P < 0.05) of scoring less than -1 SD below the mean compared with the full-term group for some of the tests: those born at < 32 weeks had a 40-140% increased risk in seven tests, those born at 32-33 weeks had a 60-80% increased risk in three tests, those born at 34-36 weeks had a 30-40% increased risk in three tests, and those born at 37-38 weeks had a 20% increased risk in two tests. Conclusions Cognitive ability is related to the entire range of gestational age, including children born at 34-36 and 37-38 weeks gestation. © 2013 John Wiley and Sons Ltd. |
| first_indexed | 2024-03-07T04:14:17Z |
| format | Journal article |
| id | oxford-uuid:c8e39c74-5d14-4497-9c6f-03e3758d2ab2 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:14:17Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:c8e39c74-5d14-4497-9c6f-03e3758d2ab22022-03-27T06:55:11ZGestational age and cognitive ability in early childhood: A population-based cohort studyJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c8e39c74-5d14-4497-9c6f-03e3758d2ab2EnglishSymplectic Elements at Oxford2013Poulsen, GWolke, DKurinczuk, JBoyle, EField, DAlfirevic, ZQuigley, MBackground Recent studies suggest that children born at late preterm (34-36 weeks gestation) and early term (37-38 weeks) may have poorer developmental outcomes than children born at full term (39-41 weeks). We examined how gestational age is related to cognitive ability in early childhood using the UK Millennium Cohort Study. Methods Cognitive development was assessed using Bracken School Readiness Assessment at age 3 years, British Ability Scales II at ages 3, 5 and 7 years and Progress in Mathematics at age 7 years. Sample size varied according to outcome between 12 163 and 14 027. Each gestational age group was compared with the full-term group using differences in z-scores and risk ratios for scoring more than -1 SD below the mean. Results Children born at <32 weeks gestation scored lower (P < 0.05) than the full-term group on all scales with unadjusted z-score differences ranging between -0.8 to -0.2 SD. In all groups, there was an increased risk (P < 0.05) of scoring less than -1 SD below the mean compared with the full-term group for some of the tests: those born at < 32 weeks had a 40-140% increased risk in seven tests, those born at 32-33 weeks had a 60-80% increased risk in three tests, those born at 34-36 weeks had a 30-40% increased risk in three tests, and those born at 37-38 weeks had a 20% increased risk in two tests. Conclusions Cognitive ability is related to the entire range of gestational age, including children born at 34-36 and 37-38 weeks gestation. © 2013 John Wiley and Sons Ltd. |
| spellingShingle | Poulsen, G Wolke, D Kurinczuk, J Boyle, E Field, D Alfirevic, Z Quigley, M Gestational age and cognitive ability in early childhood: A population-based cohort study |
| title | Gestational age and cognitive ability in early childhood: A population-based cohort study |
| title_full | Gestational age and cognitive ability in early childhood: A population-based cohort study |
| title_fullStr | Gestational age and cognitive ability in early childhood: A population-based cohort study |
| title_full_unstemmed | Gestational age and cognitive ability in early childhood: A population-based cohort study |
| title_short | Gestational age and cognitive ability in early childhood: A population-based cohort study |
| title_sort | gestational age and cognitive ability in early childhood a population based cohort study |
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