Validity of diagnoses, procedures, and birth records in a Japanese administrative claims database for pediatric...

Area of Science:

• Pediatric Health Research
• Health Informatics
• Clinical Epidemiology

Background:

• Administrative claims data, such as the Japanese Diagnosis Procedure Combination (DPC) database, are increasingly used in clinical studies.
• However, the accuracy of recorded diagnoses and procedures in these datasets for pediatric populations remains under-validated.
• Ensuring data integrity is crucial for reliable pediatric research using national health databases.

Purpose of the Study:

• To assess the validity of diagnoses and procedures recorded in the Japanese Diagnosis Procedure Combination (DPC) database for pediatric patients.
• To determine the accuracy of specific diagnoses, in-hospital death records, and critical care procedures in pediatric claims data.
• To evaluate the reliability of birth record data (gestational age, birth weight) for neonates in the DPC database.

Main Methods:

• A validation study comparing medical charts (reference standard) against the Japanese DPC database for patients under 16 years old.
• Inclusion of data from a single academic hospital in Tokyo between 2018 and 2022.
• Assessment of positive predictive values for six key pediatric diagnoses and in-hospital death, and sensitivities/specificities for intubation, mechanical ventilation, and high-flow nasal cannula use. Evaluation of gestational age and birth weight concordance.

Main Results:

• Positive predictive values for diagnoses ranged from 70% (nontraumatic intracranial hemorrhage) to 100% (trisomy 21, in-hospital death).
• Procedure sensitivities varied (36% for high-flow nasal cannula to 89% for mechanical ventilation in NICU), with specificities consistently above 95%.
• High concordance was observed for gestational age and birth weight between chart data and claims data.

Conclusions:

• The Japanese DPC database demonstrates confirmed validity for specific pediatric diagnoses, procedures, and birth records.
• These findings suggest that Japanese administrative claims data can be a valuable resource for pediatric clinical studies.
• Researchers can confidently utilize the DPC database for studies focusing on validated diagnoses, procedures, and neonatal data, enhancing the scope of pediatric research.