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 4 Confirmatory factor analysis of the unidimensional structure of IQCODE adjusted with residual correlations

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 3^a	Model 4^a
1.	Recognizing the faces of family and friends	0.746^*	---
2.	Remembering the names of family and friends	0.783^*	0.785^*
3.	Remembering things about family and friends	0.860^*	0.861^*
4.	Remembering things that have happened recently	0.858^*	0.860^*
5.	Recalling conversations a few days later	0.824^*	---
6.	Forgetting what he/she wanted to say in the middle of a conversation	0.767^*	0.759^*
7.	Remembering his/her address and telephone number	0.823^*	0.825^*
8.	Remembering what day and month it is	0.862^*	0.863^*
9.	Remembering where things are usually kept	0.737^*	---
10.	Remembering where to find things which have been put in a different place from usual	0.795^*	0.795^*
11.	Adjusting to any change in his/her day-to-day routine	0.667^*	0.667^*
12.	Knowing how to work familiar machines around the house	0.840^*	0.833^*
13.	Learning to use a new gadget or machine around the house	0.818^*	---
14.	Learning new things in general	0.841^*	0.842^*
15.	Remembering things that happened to her/him when she was young	0.773^*	0.779^*
16.	Remembering things he/she learned when he/she was young	0.720^*	---
17.	Understanding the meaning of unusual words	0.791^*	0.793^*
18.	Understanding magazine or newspaper articles	0.823^*	0.825^*
19.	Following a story in a book or on TV	0.847^*	0.851^*
20.	Composing a letter to friends or for business purposes	0.737^*	0.742^*
21.	Knowing about important historical events of the past	0.830^*	0.834^*
22.	Making decisions on everyday matters	0.878^*	0.871^*
23.	Handling money for shopping	0.896^*	0.896^*
24.	Handling financial matters, e.g. the pension, dealing with the bank	0.877^*	---
25.	Handling other everyday arithmetic problems,	0.902^*	0.900^*
26.	Using his/her intelligence to understand what's going on and to reason things through	0.829^*	0.830^*
iq 01 ↔ iq 02^b		0.450^*	---
iq 04 ↔ iq 05		0.537^*	---
iq 09 ↔ iq 10		0.610^*	---
iq 12 ↔ iq 13		0.501^*	---
iq 13 ↔ iq 14		0.432^*	---
iq 15 ↔ iq 16		0.609^*	---
iq 23 ↔ iq 24		0.628^*	---
RMSEA^c		0.050 (0.046-0.055)	0.058 (0.053-0.064)
CFI^d		0.985	0.983
TLI^e		0.983	0.981

*p-value <0.001
^a Factors loadings
^b Freely estimated residual correlations
^c Root Mean Square Error of Approximation (RMSEA); 90 % confidence interval in brackets
^d Comparative Fit Index (CFI)
^e Tucker-Lewis Index (TLI)

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