Re-assessing the dimensional structure of the Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE): empirical evidence for a shortened Brazilian version

Reichenheim, Michael; dos Santos Sanchez, Maria Angélica; Lourenço, Roberto Alves

doi:10.1186/s12877-015-0098-9

Table 3 Analysis of the bi-dimensional structure of the Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE) using the exploratory structural equation models (Model 1) and confirmatory factor analysis (Model 2)

From: Re-assessing the dimensional structure of the Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE): empirical evidence for a shortened Brazilian version

Item		Model 1		Model 2
Item		factor 1^a	factor 2^a	factor 1^a	factor 2^a
1.	Recognizing the faces of family and friends	0.678^*	0.118	0.788^*
2.	Remembering the names of family and friends	0.834^*	−0.004	0.819^*
3.	Remembering things about family and friends	0.695^*	0.197	0.884^*
4.	Remembering things that have happened recently	0.892^*	0.023	0.904^*
5.	Recalling conversations a few days later	0.887^*	−0.003	0.875^*
6.	Forgetting what he/she wanted to say in the middle of a conversation	0.699^*	0.096	0.788^*
7.	Remembering his/her address and telephone number	0.708^*	0.146	0.845^*
8.	Remembering what day and month it is	0.637^*	0.257	0.886^*
9.	Remembering where things are usually kept	0.815^*	−0.008	0.797^*
10.	Remembering where to find things which have been put in a different place from usual	0.863^*	−0.010	0.842^*
11.	Adjusting to any change in his/her day-to-day routine	0.200	0.483^*		0.673^*
12.	Knowing how to work familiar machines around the house	0.017	0.852^*		0.865^*
13.	Learning to use a new gadget or machine around the house	−0.001	0.861^*		0.857^*
14.	Learning new things in general	0.185	0.690^*		0.864^*
15.	Remembering things that happened to him/her when he/she was young	0.155	0.672^*		0.817^*
16.	Remembering things he/she learned when he/she was young	0.075	0.714^*		0.782^*
17.	Understanding the meaning of unusual words	0.187	0.621^*		0.798^*
18.	Understanding magazine or newspaper articles	−0.083	0.910^*		0.827^*
19.	Following a story in a book or on TV	0.030	0.827^*		0.852^*
20.	Composing a letter to friends or for business purposes	−0.190	0.925^*		0.742^*
21.	Knowing about important historical events of the past	0.136	0.709^*		0.836^*
22.	Making decisions on everyday matters	0.074	0.814^*		0.881^*
23.	Handling money for shopping	−0.113	1.000^*		0.932^*
24.	Handling financial matters, e.g. the pension, dealing with the bank	−0.192	1.000^*		0.914^*
25.	Handling other everyday arithmetic problems	0.059	0.852^*		0.905^*
26.	Using his/her intelligence to understand what's going on and to reason things through	0.180	0.668^*		0.837^*
f1 ↔ f2 ^b		0.866^* (0.820-0.912)		0.897^* (0.875-0.919)
\( \sqrt{\rho_{ve(f1)}} \) ^c		---		0.844^* (0.826-0.862)
\( \sqrt{\rho_{ve(f2)}} \)		---		0.840^* (0.820-0.859)
RMSEA^d		0.062 (0.058-0.067)		0.057 (0.053-0.061)
CFI^e		0.979		0.981
TLI^f		0.975		0.979

*p-value <0.001
^a Factors loadings
^b Correlation factors. 95 % confidence interval estimated using bootstrap (1000 replications)
^c Square root of the average variance extracted; 95 % confidence interval estimated using bootstrap (1000 replications)
^d Root Mean Square Error of Approximation (RMSEA); 90 % confidence interval in brackets
^e Comparative Fit Index (CFI)
^f Tucker-Lewis Index (TLI)

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ISSN: 1471-2318

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