Long-term chronic diseases and 1-year use of healthcare services by children under 18 years of age during 2018–2019: A French nationwide observational study

Among children younger than 18 years, the prevalence of long-term chronic diseases (LTDs) is not well known in France, nor the frequency of the use of healthcare services. This nationwide observational study focused on both topics over a 1-year period following the birth or birthday of French children in 2018 and compared the LTD status and use of healthcare. We selected children living in mainland France from the national health data system (SNDS). It includes data concerning the LTD status, which guarantees 100% reimbursement for related healthcare expenditures. We calculated the median and interquartile range (IQR) for the prevalence of LTDs and the rate of children using healthcare services at least once during the year. We included 13.211 million children (51.2% boys), of whom 4% had at least one LTD (boys: 4.6%, girls: 3.3%). Mental and behavioral disorders were the most frequent cause (1.6%). At least one visit to a general practitioner (GP) or pediatrician was found for 88% of children (median: 3, IQR: 2–6): 98% for children under 1 year of age and 81% for children aged 14–17 years. A pediatrician was visited by 17% of children, another specialist by 39%, a dentist by 37%, with peaks of about 60% at the ages of 6, 9, and 12 years; 8% visited a nurse and 7% visited a physiotherapist. At least one emergency department visit was recorded for 24% of children (42%