Another confounding variable could be demography as well. Depending on what town you pick in Long Island you might end up with a population that is predominantl

Another confounding variable could be demography as well. Depending on what town you pick in Long Island you might end up with a population that is predominantly of a group that might hold elevated risk for whatever reason. E.G. among women there is significantly elevated risk of breast cancer if you have some Ashkenazi Jewish heritage. https://www.cdc.gov/cancer/breast/young_women/bringyourbrave/hereditary_breast_cancer/jewish_women_brca.htm https://www.cdc.gov/cancer/breast/young_women/bringyourbrave...