. Author manuscript; available in PMC: 2016 Sep 24.

Published in final edited form as: J Alzheimers Dis. 2015 Sep 24;48(0 1):S43–S55. doi: 10.3233/JAD-150251

Table 1.

Characteristics of all SCD Items

Domain	Instrument	Specific Query	Comparison group	Response Scale	Endorsement % (n)	SCD Rate %
*Memory*	*GDS*	Do you feel you have more problems with memory than most?	Most others	No	93.3 (140)	6.7
	*GDS*	Do you feel you have more problems with memory than most?	Most others	Yes	6.7(10)	6.7
	*BAS*	Please rate your ability to remember as compared to other people your age	Others of same age	Excellent	12.0 (18)	3.4
				Above average	32.7 (49)
				Average	52.0 (78)
				Below average	2.7 (4)
				Very impaired	0.7 (1)
	*QOL*	How about your memory? How has it been lately?	None	Excellent	14.0 (21)	0.7
				Good	60.7 (91)
				Fair	24.7 (37)
				Poor	0.7 (1)
	OE^a	I’d like you to tell me what you think about your memory abilities	Others of same age^b	No complaint	32.9 (47)	4.9
				Age-related complaints	62.2 (89)
				Significant complaints	4.9 (7)
*Concentration*	*GDS*	Do you have trouble concentrating?	None	No	80.0 (120)	20.0
	*GDS*	Do you have trouble concentrating?	None	Yes	20.0 (30)	20.0
	*BAS*	Please rate your ability to concentrate and attend as compared to other people your age	Others of same, age	Excellent	16.0 (24)	5.3
				Above average	42.7 (64)
				Average	36.0 (54)
				Below average	4.6 (7)
				Very impaired	0.7 (1)
*Decision-* *making*	*GDS*	Is it easy for you to make decisions?	None	Yes	76.0 (114)	24.0
*Decision-* *making*	*GDS*	Is it easy for you to make decisions?	None	No	24.0 (36)	24.0
*Clarity of* *Mind*	*GDS*	Is your mind as clear as it used to be?	Previous Self	Yes	52.7 (79)	47.3
*Clarity of* *Mind*	*GDS*	Is your mind as clear as it used to be?	Previous Self	No	47.3 (71)	47.3
*Speech*	*BAS*	Please rate your ability to speak clearly as compared to other people your age	Others of same age	Excellent	48.0 (72)	0.7
				Above average	32.0 (48)
				Average	19.3(29)
				Below average	0.7 (1)
				Very impaired	0 (0)
*Word-Finding*	*BAS*	Please rate your ability to say the word you are thinking of as compared to other people your age	Others of same age	Excellent	15.3 (23)	13.3
				Above average	22.0 (33)
				Average	49.3 (74)
				Below average	13.3 (20)
				Very impaired	0 (0)

Rates of SCD refer to frequency of responses in bold. aN = 143 for the OE. bAlthough not explicit in the question, answers were scored with reference to expectations based on age. GDS = Geriatric Depression Scale; BAS = Brief Anosognosia Scale; QOL = Quality of Life-AD; OE = Open-Ended question.