TABLE 2.

Clinical and Demographic Characteristics

Characteristic	Controls (n = 146)	SD (n = 128)	P Value
Gender
Female	96 (66)	101 (79)	0.02
Male	50 (34)	27 (21)
Race
White/Caucasian	102 (70)	103 (80)	0.13
Black/African   American	36 (25)	20 (16)
Other	8 (5)	5 (4)
Age, y	55.0 ± 14.9	59.3 ± 12.4	0.009
Duration of disease, y	7.4 ± 12.7	17.4 ± 13.6	<0.001
Depression	42 (29)	36 (28)	0.91
Anxiety	28 (19)	32 (25)	0.25
Depression and/or  anxiety	51 (35)	52 (41)	0.33

Values are represented as mean ± standard deviation or frequency (%).