Rate: Number of hospitalizations per 100,000 children under 5 years old.

Definition: Rate of hospitalizations due to asthma (primary diagnosis of asthma, defined by ICD-9 code 493 for January 2000 through September 2015; and ICD-10 codes J44 and J45 for the last quarter of 2015).

Source: New Jersey Uniform Billing Patient Summary Data (Hospital Discharges), Office of Health Care Quality and Assessment, New Jersey Department of Health

Rate: Number of emergency room visits per 100,000 children age 0 - 4 years old.

Definition: Rate of emergency room visits due to asthma (primary diagnosis of asthma, defined by ICD-9 code 493 for January 2000 through September 2015; and ICD-10 codes J44 and J45 for the last quarter of 2015).

Source: New Jersey Uniform Billing Patient Summary Data (Hospital Discharges), Office of Health Care Quality and Assessment, New Jersey Department of Health