Psychometric validation of the Self-Care Inventory-Revised (SCI-R) in UK adults with type 2 diabetes using data from the AT.LANTUS Follow-on study

Table 3 Model fit of the SCI-R

Model ¹	χ ² *(DF)*	CFI	TLI	RMSEA
1: unidimensional, 14 items (excluding item 3)	412.49** (77)	.663	.602	.111
2: unidimensional, 13 items (excluding items 3 and 13)	385.36** (65)	.670	.670	.118
3: unidimensional, 12 items (excluding item 3, 13 & 15)	349.02** (54)	.677	.605	.125
4: 2-factor model (active-management & preventative routine), 15 items (including item 3)	427.50** (89)	.662	.601	.104
5: 2-factor model (glycemic control & other items), 15 items (including item 3)	429.53** (89)	.660	.599	.104
6: 2-factor model (glycemic control & other items), 13 items (excluding items 3 & 13)	385.36** (64)	.669	.597	.119

** p < 0.001.
¹As recommended by Weinger et al. (2005) and indicated by substantial missing data, item 3 (check ketones) was excluded from our initial testing of unidimensional models. However, as many people had completed item 3, we tested its inclusion in models 4 and 5.
DF, degrees of freedom, CFI, comparative fit index, TLI, Tucker-Lewis index, RMSEA, root mean squared error of approximation.

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