Negative Effect of Smoking

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Smoking in pregnancy tied to lower reading scores in children Share This Tags Babies exposed to their mother’s cigarette smoke in the womb later perform more poorly on reading comprehension tests, according to a new study. “It’s not a little difference – it’s a big difference in accuracy and comprehension at a critical time when children are being assessed, and are getting a sense of what it means to be successful,” lead author Dr. Jeffrey Gruen of Yale University told Reuters Health. In the study, researchers found that children born to mothers who smoked more than one pack per day struggled on tests specifically designed to measure how accurately a child reads aloud and if she understands what she read. On average, children exposed to high levels of nicotine in utero — defined as the minimum amount in one pack of cigarettes per day — scored 21 percent lower in these areas than classmates born to non-smoking mothers. The difference remained even when researchers took other factors — such as if parents read books to their children, worked in lower-paying jobs or were married — into account. Put another way, among students who share similar backgrounds and education, a child of a smoking mother will on average be ranked seven places lower in a class of 31 in reading accuracy and comprehension ability, said co-author Jan Frijters of Brock University in Ontario, Canada. Previous studies have found smoking during pregnancy is linked to lower IQ scores and academic achievement, and more behavioral disorders. The authors found no reports so far that zeroed in on specific reading tasks like accuracy and comprehension in a large population. The team, which published their results in The Journal of Pediatrics, pulled data from more than 5,000 children involved in the Avon Longitudinal Study of Parents and Children (ALSPC) study that began in the
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