We further conducted factor analyses for the
other 14 symptoms and obtained four clusters,
named as ‘‘loss of energy’’ (LE), ‘‘poor intake’’
(PI), ‘‘autonomic dysfunction’’ (AD), and
‘‘aerodigestive impairment’’ (AI). LE included
fatigue and weakness. PI included anorexia,
taste alteration, dysphagia, constipation, and
dry mouth/thirst. AD included restlessness/
heat, dizziness, insomnia, and night sweats.
AI included nausea/vomiting, abdominal fullness,
and dyspnea (Table 3).
Based on the factor scores of five symptom
factors, we further conducted cluster analysis
on 394 patients with complete data selected
from 427 participants. We decided to divide
the 394 patients into six groups after