We assessed the effect of continuity of care (COC) on the frequency of hospitalization for Ambulatory care-sensitive conditions (ACSCs) to estimate the impact of COC and hearing disability relative to the controls. This retrospective cohort study used claim data of Korean National Health Insurance Service – National Sample Cohort 2.0 DB. We used propensity score matching to determine a control group for the hearing disability group by age, sex, and the Charlson Comorbidity Index. The hearing-impaired group included 720 participants, and the non-disabled control group, consisting of individuals without any form of disability, had 1,423 individuals. We used the frequency of hospitalization for ACSCs during one-year follow-up as the dependent variable for Poisson regression. We measured COC with the Bice–Boxerman Continuity of Care Index (COCI); higher COCI values represent better continuity of care, with COCI values ranging from 0 to 1. Poisson regression showed that disability status modifies the effect of COCI on the incidence of hospitalization. COCI = 1 reduced hospitalizations in people with hearing disabilities (adjusted Incidence Rate Ratio [aIRR]: 0.30, 95% CI: 0.20–0.44) but was not statistically significant for controls. In the COCI = 1 group, the effect of disability was not significant(aIRR: 1.10, 95% CI: 0.83–1.44). Compared to people without disabilities, enhanced COC for people with hearing disabilities was more effective in preventing hospitalizations for ACSCs.
Supplementary Information
The online version contains supplementary material available at 10.1038/s41598-024-74470-w.