. Author manuscript; available in PMC: 2020 Sep 1.

Published in final edited form as: Am J Geriatr Psychiatry. 2019 Mar 27;27(9):908–917. doi: 10.1016/j.jagp.2019.03.016

Table 1.

Characteristics of subjects

Variable	AD-P, N=367	AD+P, N=256	df	p value^*
Follow-up, years	2.5 (3.6)	3.3 (3.1)	595	0.003
Baseline MMSE	21.8 (4.5)	20.5 (5.3)	490	<0.001
Age at baseline	76.9 (6.9)	76.6 (6.4)	576	0.54
Sex
female	214 (58 %)	164 (64 %)	1	0.15
male	153 (42 %)	92 (36 %)	1	0.15
Race
Asian	2(1%)	0(0%)	2	0.48
African-American	23 (6 %)	20 (8 %)
Caucasian	342 (93 %)	236 (92 %)
Number of drugs taken	9.7 (4.5)	8.6 (4)	587	0.002
Education, years
<12	162 (44 %)	152 (59 %)	1	<0.001
>=12	205 (56 %)	104 (41 %)	1	<0.001

AD-P: Alzheimer Disease without psychosis; AD+P: Alzheimer disease with psychosis; MMSE:

Mini-mental State Examination.

Results for AD-P and AD+P are mean (SD) for continuous variables and total (%) for categorical variables.

T-test for continuous variables (Follow-up, years; Baseline MMSE, Age at baseline), Chi-square test for sex and education, and Fisher exact test for race.