Doucette A, Hedgeman E, Fryzek J. Assessing the Agreement of Hospitalization Estimates Between Three Nationally Representative US Hospital Discharge Databases, the Nationwide Inpatient Sample (NIS), the National Hospital Discharge Survey (NHDS) and the Kid’s Inpatient Database (KID). Presented at the International Conference of Pharmacoepidemiology, August 24-26 2015, Boston, MA.