Table 2.

T Tests for Selected Variables and Presence or Absence of AB

Variables	AB	Mean	SD	t	p
Education	No	3.9325	1.3160	−1.6210	0.108
	Yes	3.4717	1.5872
MMSE	No	9.8881	6.6496	2.1240	0.036*
	Yes	7.1724	6.5374
Comorbidity index	No	4.6667	1.5849	0.1520	0.8800
	Yes	4.6200	1.5894
Past agreeableness	No	47.3645	12.8399	2.0040	0.048*
	Yes	42.3161	13.1784
Past aggression	No	0.3939	0.4948	−0.7860	0.434
	Yes	0.4743	0.5637
Nighttime sleep	No	263.6194	95.9108	−1.6050	0.112
	Yes	294.1689	100.8446
Negative affect PWD	No	0.0759	0.0513	−2.8870	0.005**
	Yes	0.1066	0.0588
Caregiver familiarity	No	41.7344	11.4752	−0.2470	0.805
	Yes	42.2163	8.6535
Caregiver negativity	No	0.0727	0.0482	−1.9430	0.055
	Yes	0.0932	0.0594

Notes: MMSE=Mini-Mental State Examination; AB=aggressive behavior; PWD=person with dementia.

^*p < .05;

^**p < .01.