Continuity of primary care and avoidable hospitalization in a young population with asthma: a population-based cohort study.

Existing evidence regarding the impact of continuity of care (COC) in asthma patients is limited, and its quality is low to moderate. This study aimed to investigate associations between relational COC within primary care and asthma-related hospitalizations in children using a robust methodology. This study is a population-based cohort study that utilized a national claims database in South Korea. The study comprised 136,296 individuals under 20 years old who were newly diagnosed with asthma between 2015 and 2016. These were classified into high, medium, and low continuity groups based on the continuity of care index (COCI). The primary outcome measure was the incidence of asthma-related hospitalizations. During a two-year follow-up period, 10,922 patients (8.01%) were hospitalized: 2520 (5.59%) in the high-continuity group, 3188 (6.98%) in the medium-continuity group, and 3867 (8.48%) in the low-continuity group. After adjusting for confounding covariates, patients in the low- and medium-continuity groups exhibited significantly higher risks of hospital admission (adjusted hazard ratio (aHR) = 1.30 [95% confidence interval = 1.24-1.37] and aHR = 1.14 [1.08-1.20], than those in the high-continuity group. Sensitivity and subgroup analyses findings were consistent. In a young population with asthma increased continuity of primary care was associated with less hospitalization.