Table 1.

Demographic and clinical characteristic of the sample.

	Non-Anxious Comparison Group		Generalized Anxiety Group		Group comparison* (t/Χ2/W, p)
	Old (n=21)	Young (n=10)	Old (n=15)	Young (n=9)
Age (mean, SD)	70.76±7.33	33.6±10.49	67.4±6.52	31.67±10.06	t(53)=0.90, p=0.37
Gender (F)	12	6	11	8	Χ2(1)=1.86, p=0.17
Race **(W/AA/A)	18/3/0	9/1/0	14/1/0	6/2/1	Fisher’s exact p=0.82
Duration of Illness (median (min, max), years)	n/a	n/a	8 (1,49)	11(4,31)	W#=90.5 p=0.80
Mini Mental State Examination [median, (min, max)]##	30 (28, 30) (n=12)	n/a	29 (27,30) (n=9)		W#=69, p=0.25
HARS (mean, SD)	3.05±1.88	2±1.63	19.6±2.5	22.22±3.49	t(53)=−26.49 p<0.001
PSWQ (mean, SD)	31.81±7.73	29.5±8.49	56.27±11.8	65.89±10.04	t(53)=−10.74, p<0.001
GADSS (mean, SD)	2.71±2.37	2.2±1.99	10.33±2.82	14.44±3.84	t(53)=−11.46 p<0.001

^*Non-Anxious Comparison vs. GAD (young and old together), except for duration of illness (old vs. young GAD). HARS=Hamilton Anxiety Rating Scale; PSWQ=Penn State Worry Questionnaire. GADSS= Generalized Anxiety Disorder Severity Scale.

^**W=White, AA=African American, A=Asian.

^#Wilcoxon’s rank sum test.

^##Anxious old vs. control old only