Objective: Patients with 'late presentation' (LP) of chronic hepatitis C infection (HCV) have already developed advanced liver disease before receiving direct-acting antiviral (DAA) treatment. Even after successful treatment, the risk of morbidity and premature death remains elevated, leading to an unnecessary disease burden. This study aimed to assess the prevalence of LP within the prospective observational Swiss Hepatitis C Cohort (SCCS) and evaluate risk factors as determinants of LP.
Methods: Treatment-naïve participants of SCCS who received DAA treatment between 2014 and 2019 were included. Demographic, clinical and behavioural data were compared between the LP and non-LP strata. LP prevalence was calculated over time and by year. LASSO regression was used to identify potential risk factors for LP, and odds ratios were calculated by refitting logistic regression models.
Results: In this explorative, retrospective case-control study using data of n = 5829 SCCS members, a total of 21.3% received their first HCV treatment. The cumulative LP prevalence decreased from mid-2015 and stabilised at 46.5% ( n = 579) by the end of 2019. Male gender, higher age and a history of alcohol overuse were associated with a higher risk of LP.
Conclusion: Despite the study's limitations, LP prevalence was higher than anticipated, considering Switzerland's availability period and universal access to DAAs. Therefore, any HCV LP should be viewed as a healthcare system failure, primarily in high-income economies. As LP is directly linked to the disease burden, it must be included as a mandatory parameter in surveillance response systems of HCV elimination programs.
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