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Table 3 Model fit of the SCI-R

From: 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

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
  1. ** p < 0.001.
  2. 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.
  3. DF, degrees of freedom, CFI, comparative fit index, TLI, Tucker-Lewis index, RMSEA, root mean squared error of approximation.