Trends in sudden cardiac death mortality in Italy, 2013-2019.

We sought to analyse the incidence of sudden cardiac deaths (SCDs) amongst subjects aged less than 39 years in Italy and its time trend between 2013 and 2019. Data regarding cause-specific mortality and population size by sex in 5-year age groups were extracted from the World Health Organization (WHO) mortality database. Decedents reporting the codes I46.1, I45.6, I47.2, I41.9, R09.2 and R96.0 of the International Classification of Disease-10 (ICD-10) coding system, were extracted. The age-adjusted mortality rates (AAMRs), with relative 95% confidence intervals (CIs) stratified by sex, were determined using the direct method. Joinpoint regression analyses were used to identify periods with statistically distinct log linear trends in SCD-related death rates. To calculate nationwide annual trends in SCD-related mortality, we assessed the annual and average annual per cent change (AAPC) and relative 95% CIs. Over the study period, 314 deaths [220 males (70.0%) and 94 females] were due to SCD corresponding to a 0.06 per 100,000 per year (0.10 per 100,000 in males and 0.04 per 100,000 in females, respectively). Proportional mortality slightly increased, without reaching the statistical significance (p = 0.82) from 3.06 to 3.56 per 100 deaths, with a similar trend in both sexes. Joinpoint regression analysis revealed a plateau in age-standardised SCD-related mortality over the period [AAPC: -4.2 (95% CI: -24.0 to 20.8, p = 0.71], which was consistent between males and females. In Italy, SCD remains a public health issue of concern in the last decade after adjusting for age.