. Author manuscript; available in PMC: 2010 Jan 8.

Published in final edited form as: Am J Geriatr Psychiatry. 2008 Oct;16(10):813–818. doi: 10.1097/JGP.0b013e31817c6aab

Table 1.

Clinical and demographic characteristics of the subjects

	GAD Elderly Subjects (group A) (N=134)	Comparison Elderly Subjects (group B) (N=33)	GAD General Adult Subjects (group C) (N=186)	t Test (¹)/chi Square (²)	One way ANOVA (F-test)	df	p value	Pairwise comparison (Tukey post-hoc test)
Demographic
Age – Mean (SD)	72.1 (8.0)	74.3 (6.2)	43.4 (10.4)		439.98	2,350	0.0001	C<B, A
%Men	35%	33%	27%		2.59	2	0.27
%White	81%	100%	83%	7.10(²)		2
Other Anxiety disorders N (%)	50 (37%)	-	103 (55%)
Education - Mean (SD)	13.8 years (3.0)	14.2 years (2.9)	80% ≥ 12^th grade	^#	^#	^#	^#
Clinical measures – Mean (SD)
GADSS	12.4 (3.1)	1.6 (2.1)	15.3 (3.4)		260.21	2,350	0.0001	A≠B≠C
HRSA	23.0 (4.7)	5.1 (3.9)	28.6 (6.8)		230.78	2,350	0.0001	A≠B≠C
PHQ9	^*	^*	13.5 (5.3)
HRSD	12.2 (4.1)	1.8 (2.1)	^**	14.18 (¹)		165	0.0001
MMSE	28.1 (2.0)	29.0 (1.3)	^**	2.22 (¹)		160	0.028
PSWQ	57.4 (12.2)	29.0 (7.6)	^**	11.90 (¹)		159	0.0001
CIRS	9.1 (3.9)	9.3 (3.1)		1.13 (¹)		160	0.26
MOS MCS	40.8 (8.8)	59.4 (3.7)	28.3 (11.0)		168.12	2,348	0.0001	A<B<C
MOS PCS	41.1 (11.3)	47.5 (7.2)	46.6 (11.8)		10.38	2,348	0.0001	A<B, C

GADSS= Generalized Anxiety Disorder Severity Scale; HRSA= Hamilton Rating Scale for Anxiety; PHQ9= Patient Health Questionnaire, 9-item depression scale; HRSD= Hamilton Rating Scale for Depression; MMSE=Mini Mental State Examination; PSWQ=Penn State Worry Questionnaire; CIRS-G=Cumulative Illness Rating Scale for Geriatrics; MOS MCS= Medical Outcome Stud, mental component scale; MOS PCS= Medical Outcome Study, physical component scale; df= degrees of freedom;

not compared due to different scales used for assessment;

measure unavailable for the elderly subjects;

^**

measure unavailable for the younger subjects.