Advance Care Planning in Amyotrophic Lateral Sclerosis: a retrospective population-based study.

BACKGROUND: . In recent decades, autonomy and self-determination in Amyotrophic Lateral Sclerosis (ALS), have gained increasing attention, and Advance Care Planning (ACP) has been incorporated into ALS guidelines. In Italy, Law 219 emphasizes the role of ACP in respecting patients' healthcare preferences. However, longitudinal data on ACP prevalence and impact remain limited. AIM: . To assess the prevalence of ACP discussions in a population of ALS patients, their effectiveness in end-of-life management, and the impact of Law 219/2017. METHODS: . Demographic and clinical data from the PARALS Register (2008-2020) were retrospectively examined, with particular focus on ACP discussions, tracheostomy preferences, and end-of-life outcomes. RESULTS: . Of 1219 ALS patients, 655 (53.7%) had ACP discussions, with 90.8% concordance between expressed choices and outcomes. The ACP prevalence increased over time from 51.6% to 61.94% (p = 0.025). Cognitive impairment, including fronto-temporal dementia and intermediate cognitive-behavioural impairment, and absence of NIMV use were negatively associated with ACP (p = 0.029 and p < 0.001). Older age was associated with tracheostomy placement (p < 0.001). ACP discussion was positively associated with gastrostomy placement, Palliative Care activation, and home death. CONCLUSIONS: . ACP plays a crucial role in ALS care, with high alignment between expressed choices and outcomes. Cognitive impairment reduced ACP participation, highlighting the need for earlier, tailored interventions. The ACP increase over the last decade reflects a growing emphasis on patient autonomy in Italy. Further efforts are needed to expand ACP adoption in ALS care, to support self-determination despite cognitive decline and disease progression.