Table 6.

Regression model for frequent nighttime awakenings^a

Effect	Coefficient	Standard Error	df	t	p
Intercept	0.5798	0.5659	399	1.02	0.306
Age	0.0011	0.0060	256	0.18	0.858
MMSE	0.0013	0.0077	256	0.17	0.865
Blessed	0.0663	0.0125	256	5.31	< 0.0001
Education	0.5798	0.5659	399	1.02	0.306
CSDD	0.0115	0.0065	256	1.78	0.076
CESD	0.0276	0.0042	256	6.58	< 0.0001
CG gender	0.0441	0.1426	256	0.31	0.757
CG age	−0.1707	0.1022	256	−1.67	0.096
Patient gender	0.1477	0.1413	256	1.04	0.297
African Americanb	0.2799	0.1643	256	1.70	0.090c
Hispanicb	−0.1267	0.1067	256	−1.19	0.236

^aMMSE, Mini-mental State Exam; Blessed, Blessed Dementia Rating Scale; CSDD, Cornell Scale for Depression in Dementia for patients; CESD, Center for Epidemiological Studies Depression Scale for caregivers; CG Gender, caregivers' gender coded so that a positive coefficient indicates that women caregivers were more likely to report the behavior; CG age, informant age similar to or younger than the patient, coded so that a negative coefficient indicates that younger caregivers were more likely to report the behavior; Patient gender, patient gender coded so that a positive coefficient indicates that women were more likely to display the behavior.

^bTest associated with these factors reflect difference from base category which was non-Hispanic whites.

^cTests of differences between model-predicted average ratings showed that African Americans were rated significantly higher on this variable than were Hispanics (t(df = 256) = 2.70, p = 0.007), even though the overall effect was not statistically significant.