Asthma the leading cause of chronic disease in children1

As the leading cause of chronic disease and missed school days in children,1 asthma affected 7.4% of Californian children in 2019-2020.2 Children (0-17-year-olds) are more likely to develop asthma if they have a family history of asthma, environmental allergies, or are exposed to tobacco smoke or air pollution.3,4,5 Children unable to manage their asthma tend to visit emergency departments (ED) at increased rates. Better management of this chronic disease is critical for improving the quality of life for children with asthma and to reducing ED visits.

This indicator tracks the number of ED visits due to asthma among 0-17-year-olds per 10,000 residents.

Childhood Asthma ED Visits

In 2022 (baseline year), there were 55.5 childhood asthma-related ED visits per 10,000 residents. The most recent rate available is 55.5 (2022). We hope to reach a target of 27.8 or lower by 2034.

More Data about Childhood Asthma ED Visits

Baseline

55.5

Current Rate

55.5

Target

27.8

Indicator Highlights

Data Snapshot

Emergency Department Visits Due to Asthma, 0-17 Years, per 10,000 Residents, Over Time

 

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Emergency Department Visits Due to Asthma, 0-17 Years, per 10,000 Residents, by Demographic Category

 

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Emergency Department Visits Due to Asthma, 0-17 Years, per 10,000 Residents, by County

 

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Indicator: Emergency department visits, 0-17 years due to asthma per 10,000 residents

Indicator Description: The number of Emergency Department (ED) visits with asthma as the primary diagnosis, among children age 0-17 in California, expressed as a rate per 10,000 residents. All non-federal hospitals in California are required to submit ED data to the Department of Health Care Access and Information (HCAI) on a quarterly basis. These records are estimated to include 98% of all ED visits in California.

Data Limitations: The California data are based on the universe of records from all licensed hospitals, as submitted to HCAI. Limitations include race/ethnicity data have not been validated; records are visit-based and not person-based; there is a potential for incorrect diagnoses and inconsistent coding.

Indicator Source: Department of Health Care Access and Information (HCAI).

Indicator Calculation Methodology: (Number of Asthma-related ED visits / total county or state population) x 10,000. The numerator is the number of ED visits with a principal diagnosis using ICD-9 code 493 (until October 2015) or ICD-10 codes beginning with J45 (after October 2015). Counts are based on the number of visits, not the number of unique individuals. The denominator consists of the estimated number of residents based on CA Department of Finance estimates (May 2023 version).

Data Source: The HCAI ED Database.

Data Collection Methodology: https://hcai.ca.gov/data-and-reports/request-data/data-documentation/

Program URL Link: https://www.cdph.ca.gov/Programs/CCDPHP/DEODC/EHIB/CPE/Pages/CaliforniaBreathing.aspx 

Reporting Cycle: Annual (December)

1. Lizzo, J.M., Goldin, J., Cotes, S. (2023) Pediatric Asthma. StatPearls. Retrieved on December 9, 2024, https://www.ncbi.nlm.nih.gov/books/NBK551631/

2. Tracking California. (2024).  Tracking California Data Explorer. Retrieved on February 2, 2025. https://data.trackingcalifornia.org/

3. UCLA Health. (2025). Pediatric Pulmonology & Sleep Medicine. Retrieved on February 9, 2025.
https://www.uclahealth.org/medical-services/pedspulmonology/clinical-services/asthma-program

4. Wang, Z., May, S. M., Charoenlap, S., Pyle, R., Ott, N. L., Mohammed, K., & Joshi, A. Y. (2015). Effects of secondhand smoke exposure on asthma morbidity and health care utilization in children: a systematic review and meta-analysis. Annals of Allergy, Asthma & Immunology115(5), 396-401. https://www.annallergy.org/article/S1081-1206(15)00523-2/fulltext

5.California Breathing. (2023) AsMA: Asthma Management Academy. Retrieved on December 9, 2024. Asthma Management Academy Infographic

6. California Department of Public Health. (2023) Asthma in California. Retrieved on December 9, 2024.  Asthma in California

7. California Department of Public Health. (2021) Asthma Inequities in California Children. Retrieved on December 9, 2024. Asthma Inequities in California Children

8. California Department of Public Health, Environmental Health Investigations Branch. (2024). California Breathing: California Asthma Control Strategies Webinar Series. Retrieved on February 9, 2025. https://www.cdph.ca.gov/Programs/CCDPHP/DEODC/EHIB/CPE/Pages/CaliforniaBreathingData.aspx

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