Psychostimulant and other effects of caffeine in 9- to 11-year-old children / Susan V. HEATHERLEY in Journal of Child Psychology and Psychiatry, 47-2 (February 2006)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 47-2 (February 2006) . - p.135–142 Titre : Psychostimulant and other effects of caffeine in 9- to 11-year-old children Type de document : Texte imprimé et/ou numérique Auteurs : Susan V. HEATHERLEY, Auteur ; Katie M.F. HANCOCK, Auteur ; Peter J. ROGERS, Auteur Année de publication : 2006 Article en page(s) : p.135–142 Langues : Anglais (eng) Mots-clés : Caffeine children cognitive-performance alertness headache mood Index. décimale : PER Périodiques Résumé : Background: Recent research on adults suggests that 'beneficial' psychostimulant effects of caffeine are found only in the context of caffeine deprivation; that is, caffeine improves psychomotor and cognitive performance in habitual caffeine consumers following caffeine withdrawal. Furthermore, no net benefit is gained because performance is merely restored to 'baseline' levels. The effects of caffeine in children is an under-researched area, with only a handful of studies being carried out in the US where children's consumption of caffeine appears to be lower on average than in the UK. Method: Twenty-six children aged between 9 and 11 years completed a double-blind, placebo-controlled study. Habitual caffeine consumers (mean daily caffeine intake = 109 mg) and non/low-consumers (12 mg) were tested on two separate days following overnight caffeine abstinence. On each day measures of cognitive performance (a number search task), and self-rated mood and physical symptoms, including alertness and headache, were taken before and after administration of 50 mg of caffeine, or placebo. Results: At baseline (before treatment), the habitual consumers showed poorer performance on the cognitive test than did the non/low-consumers, although no significant differences in mood or physical symptoms were found between the two groups. There were significant habit by treatment (caffeine vs. placebo) interactions for accuracy of performance and headache, and a significant main effect of treatment for alertness. Post hoc comparisons showed that caffeine administration improved the consumers' accuracy on the cognitive test (to near the level displayed by the non/low-consumers at baseline), but that it had no significant effect on the non/low-consumers' performance. In the consumers, caffeine prevented an increase in headache that occurred after placebo, and it increased alertness relative to placebo. Again, however, caffeine did not significantly affect levels of headache or alertness in the non/low-consumers. Conclusions: These results suggest that, like adults, children probably derive little or no benefit from habitual caffeine intake, although negative symptoms associated with overnight caffeine withdrawal are avoided or rapidly reversed by subsequent caffeine consumption. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2005.01457.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=711 [article] Psychostimulant and other effects of caffeine in 9- to 11-year-old children [Texte imprimé et/ou numérique] / Susan V. HEATHERLEY, Auteur ; Katie M.F. HANCOCK, Auteur ; Peter J. ROGERS, Auteur . - 2006 . - p.135–142. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 47-2 (February 2006) . - p.135–142 Mots-clés : Caffeine children cognitive-performance alertness headache mood Index. décimale : PER Périodiques Résumé : Background: Recent research on adults suggests that 'beneficial' psychostimulant effects of caffeine are found only in the context of caffeine deprivation; that is, caffeine improves psychomotor and cognitive performance in habitual caffeine consumers following caffeine withdrawal. Furthermore, no net benefit is gained because performance is merely restored to 'baseline' levels. The effects of caffeine in children is an under-researched area, with only a handful of studies being carried out in the US where children's consumption of caffeine appears to be lower on average than in the UK. Method: Twenty-six children aged between 9 and 11 years completed a double-blind, placebo-controlled study. Habitual caffeine consumers (mean daily caffeine intake = 109 mg) and non/low-consumers (12 mg) were tested on two separate days following overnight caffeine abstinence. On each day measures of cognitive performance (a number search task), and self-rated mood and physical symptoms, including alertness and headache, were taken before and after administration of 50 mg of caffeine, or placebo. Results: At baseline (before treatment), the habitual consumers showed poorer performance on the cognitive test than did the non/low-consumers, although no significant differences in mood or physical symptoms were found between the two groups. There were significant habit by treatment (caffeine vs. placebo) interactions for accuracy of performance and headache, and a significant main effect of treatment for alertness. Post hoc comparisons showed that caffeine administration improved the consumers' accuracy on the cognitive test (to near the level displayed by the non/low-consumers at baseline), but that it had no significant effect on the non/low-consumers' performance. In the consumers, caffeine prevented an increase in headache that occurred after placebo, and it increased alertness relative to placebo. Again, however, caffeine did not significantly affect levels of headache or alertness in the non/low-consumers. Conclusions: These results suggest that, like adults, children probably derive little or no benefit from habitual caffeine intake, although negative symptoms associated with overnight caffeine withdrawal are avoided or rapidly reversed by subsequent caffeine consumption. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2005.01457.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=711

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