Causal Chain for Aspiration Pneumonia with Underlying Conditions

Immediate Cause of Death

• Aspiration pneumonia is the immediate cause of death, with mortality rates ranging from 20% to 65% in patients with dysphagia and weakness, according to the American College of Physicians 1
• The American Thoracic Society notes that aspiration pneumonia is a common terminal event in patients with dysphagia and weakness 2

Intermediate Cause

• Severe malnutrition is the intermediate cause, leading to weakness that directly contributes to aspiration, as stated by the European Society for Clinical Nutrition and Metabolism 3
• The American Society for Parenteral and Enteral Nutrition reports that malnutrition significantly increases mortality risk in patients with dysphagia, with a pooled odds ratio for death of 2.46 among those with pneumonia and moderate malnutrition 5

Underlying Causes

• Leukemia contributes to malnutrition through increased metabolic demands and catabolic effects, according to the American Society of Clinical Oncology 3