Vitamin D deficiency could play a role in the prevention and treatment of several medical conditions including bone strength, some types of cancers, certain autoimmune diseases, cardiovascular disease and more. This project reviewed and assessed patient factors such as demographics and diagnoses that would correlate with a demonstrated low Vitamin D level in serum testing.

The most common risk factors were used including race, gender, comordbid diagnoses and time of year to create a model that improved on the yield of blood testing to better identify those patients with low 25-OH Vitamin D levels.

Race/ethnicity and insurance type were the most significant factors for not opening lab results.

No relationship was found between not opening the communication and the type of test performed or whether the results were normal or abnormal.


The aim of the project was to better understand how Vitamin D deficiencies may impact NorthShore patients.


A total of 37,827 patient cases were analyzed through the use of the Enterprise Data Warehouse (EDW).

Project Leader

Steven Eisenstein, M.D., Family Medicine in cooperation with Ari Robicsek, M.D., Internal Medicine and Infectious Disease.

Project Duration

This project began and was completed in 2011.