| The Effect of Small Class Sizes on Mortality Through Age 29 Years: Evidence From a Multicenter Randomized Controlled Trial. | |
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MedLine Citation:
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PMID: 21540326 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Limiting the number of students per classroom in the early years has been shown to improve educational outcomes. Improved education is, in turn, hypothesized to improve health. The authors examined whether smaller class sizes affect mortality through age 29 years and whether cognitive factors play a role. They used data from the Project Student Teacher Achievement Ratio, a 4-year multicenter randomized controlled trial of reduced class sizes in Tennessee involving 11,601 students between 1985 and 1989. Children randomized to small classes (13-17 students) experienced improved measures of cognition and academic performance relative to those assigned to regular classes (22-25 students). As expected, these cognitive measures were significantly inversely associated with mortality rates (P < 0.05). However, through age 29 years, students randomized to small class size nevertheless experienced higher mortality rates than those randomized to regular size classes (hazard ratio (HR) = 1.58, 95% confidence interval (CI): 1.07, 2.32). The groups at risk included males (HR = 1.73, 95% CI: 1.05, 2.85), whites/Asians (HR = 1.68, 95% CI: 1.04, 2.72), and higher income students (HR = 2.20, 95% CI: 1.06, 4.57). The authors speculate that small classes might produce behavior changes that increase mortality through young adulthood that are stronger than the protective effects of enhanced cognition. |
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Authors:
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Peter Muennig; Gretchen Johnson; Elizabeth Ty Wilde |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-5-3 |
Journal Detail:
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Title: American journal of epidemiology Volume: - ISSN: 1476-6256 ISO Abbreviation: - Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-5-4 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7910653 Medline TA: Am J Epidemiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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