Symptom cluster: the Kaiser-Meyer Olkin
measure of sampling adequacy showed a factorable
(KMO= .904). Clusters of symptom distress were
formed into seven clusters, labeled as: emotional
problems, memory function decline, respiration
difficulty, fatigue related disease, sleep alteration,
pain and unpleasant sensation, and respiratory
muscle weakness. The three remainder clusters
could not be detected in the interrelationship between
symptoms since they included less than three
symptoms within their clusters