Prevalence of Gastrointestinal Symptoms, Severity of Dysphagia, and Their Correlation with Severity of Amyotrophic Lateral Sclerosis in a Mexican Cohort

Objectives: Our study aimed to identify the prevalence and severity of gastrointestinal (GI) symptoms and dysphagia in patients with amyotrophic lateral sclerosis (ALS) and to assess whether a correlation exists between these symptoms and the severity of ALS progression. Methods: The presence and severity of GI symptoms and dysphagia were identified by means of the Gastrointestinal Symptom Rating Scale (GSRS) and the Functional Outcome Swallowing Scale (FOSS). The Revised ALS Functional Rating Scale (ALSFRS-R) was utilized to determine the severity of ALS. Analysis of data was performed with Spearman correlations in semi-qualitative variables of clinical scales. ALSFRS-R scores were divided into 2 categories: those with mild to moderate ALS (≥40–30 points) and patients with moderate to advanced ALS (29–≤20 points). Results: We studied 43 patients with definite ALS. The most frequent GI symptoms were constipation (60.5%), rectal tenesmus (57.5%), hard stools (55.0%), and borborygmus (42.5%). The moderate to advanced ALS stage was correlated with constipation (r = 0.334; p = 0.028), acid regurgitation (r = 0.384; p = 0.013), eructation (r = 0.334; p = 0.032), rectal tenesmus (r = 0.498; p = 0.001), and functional dysphagia (r = 0.656; p = <0.001). Conclusions: Early detection of these GI symptoms can guide timely therapeutic decisions to avoid weight loss, a predictor for worse prognosis. This study highlights the relevance of the detection of these symptoms in ALS patients who score ≤29 points in the ALSFRS-R scale to establish an appropriate treatment, prevent systemic complications, provide more comfort, and improve quality of life.