Why the study?
Does social environment (area educational achievement) influence individual diastolic blood pressure levels?
Does social environment (area educational achievement) influence individual diastolic blood pressure levels?
Social environment has a marginal but detectable effect on individual diastolic blood pressure, and ecological analyses may overestimate these geographical differences compared to multilevel models.
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Marginal area-level BP association cautions against ecological overestimation; leaves open social environment's influence on individual diastolic BP.
Juan Merlo (2001) studied this question.
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