Trends in Adverse Drug Reactions Among Children: Evidence from Jiangsu Province of China, 2010-2019.

Abstract

Medication safety among children represents an underrecognized public health concern worldwide, yet little evidence was found in China. This study aimed to examine trends in rates of pediatric adverse drug reaction (ADR) reports in Jiangsu Province of China with a catchment population of more than 11 million children. Data for children aged under 15 years were extracted from the spontaneous reporting system of ADR surveillance in Jiangsu Province. Suspected therapeutic agents for ADRs were coded using the Anatomical Therapeutic Chemical classification system. We used the Chinese modification of the International Classification of Diseases, Tenth Revision, to group primary diseases, and the Medical Dictionary for Regulatory Activities to classify the manifestation of ADRs. We used Joinpoint to estimate age-adjusted ADR rates stratified by sex from July 2010 to June 2019, and further by specific features, including patient characteristics, main suspected therapeutic medications, primary diseases, and ADRs. We used the percentage change annualized estimator to evaluate trends over time. A total of 79,903 ADR reports were identified among children aged under 15 years, which accounted for 11.4% of all ADRs reported in Jiangsu Province during the same period. The age-adjusted ADR report rates increased significantly from 66.20 to 96.76 per 100,000 children during the period July 2010-June 2019, with an annual increase of 4.9% (95% confidence interval 1.3-8.5%; p value 0.014). Of all ADR reports, there were 47,774 (59.8%) boys and 32,129 (40.2%) girls. Children aged 0-4 years accounted for more than half of the ADR reports (n=47,680, 59.7%). Skin and subcutaneous tissue disorders were the most frequently reported ADRs (45,773, 57.3%). Respiratory diseases were the most commonly observed medical conditions in relation to pediatric ADRs, accounting for 68.8% (n=54,940) of all ADR reports, and anti-infectives for systemic use consistently represented over time the most common medication group, contributing to 69.8% of all reports. A reduction in ADR report rates was observed for vaccines, with an annual decrease of 19% in children. ADRs remain a public health challenge among the vulnerable pediatric populations. Findings from the present study call for continuing efforts in ADR prevention and medication safety improvement in children.