Factor % variance 1 2 3 Psychotic depression Disruptive behaviors Rhythm disturbance 33.6% 20.7% 15.7% Delusions #.812 .223 -.078 Hallucinations #.728 .007 .177 Activity disturbance -.108 #.889 -.120 Aggressiveness #.524 #.665 268 Rhythm disturbance -.003 -.005 .940 Affective disturbance #.494 -.002 .370 Anxiety #.739 -.412 -.193 LP group: Alzheimer’s disease patients whose MMSE scores were <12. AD: Alzheimer’s disease BEHAVE-AD: behavioral pathology in Alzheimer’s disease rating scale delusions: paranoid and delusional ideation, rhythm disturbance: diurnal rhythm disturbances, anxiety: anxieties and phobias #: symptoms with a factor loading≥.400

Table 5: Results of varimax rotation factor analysis of BEHAVE-AD items in the LP group.

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