If smoking during pregnancy causes lower birth weight but not things such as crime, cognitive ability, mental illness, do we really care?
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yes, we probably still care. Those outcomes are not great.
Low birth weight? What's the problem with that if it's unrelated to ADHD, crime, academic achievement etc.?
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lots of health stuff, short term and long term http://www.marchofdimes.org/complications/low-birthweight.aspx …
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and also parents freak out about baby weight. Small picture matters sometimes as much as the big picture.
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