New York City Health Atlas

Low Birthweight Births

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Percent of infants born weighing less than 2,500 grams.


Sum of births of infants weighing less than 2,500 grams per 1,000 live births.


NYC Department of Health and Mental Hygiene, Bureau of Vital Statistics, Epiquery Birth Data Module, 2009-2013.

Years of Data


Additional Resources

City Wide Average


3810 (Districts 101 & 102) Average


Correlation Is Not Causation

In statistics, correlation is a measure of association between two numeric variables. The strength of correlation between two variables is represented by the correlation coefficient, represented by the abbreviation r. Correlation coefficients range between -1 to 1.

Though the correlation coefficient indicates the strength of an association, it does not provide information about whether the change in one variable is caused by the other.

For example, if the correlation between adult smoking prevalence and child poverty is 0.7—a strong correlation—we cannot say either that adult smoking causes child poverty or, inversely, that child poverty causes smoking. We only know that as one of these variables increases, the other tends to increases.