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Table 3 Confirmatory Factor Analyses for Limitation Domain in Late Life Disability Questionnaire from LIFE-P

From: Evaluation of the late life disability instrument in the lifestyle interventions and independence for elders pilot (LIFE-P) study

16 items from Jette et al.          
Time No. of Factors Chi-Square df p-value Goodness of Fit Index CFI a Non-normed Index NFI b RMSEA c
Baseline 1 512.9 104 < .0001 0.8484 0.8302 0.8313 0.7971 0.0991
  2 321.7 89 < .0001 0.9008 0.9034 0.9046 0.8727 0.0808
Month 6 1 438.3 104 < .0001 0.8499 0.8621 0.8630 0.8278 0.0926
  2 237.4 89 < .0001 0.9205 0.9388 0.9396 0.9067 0.0667
Month 12 1 403.7 104 < .0001 0.8727 0.8832 0.8839 0.8497 0.0872
  2 282.4 89 < .0001 0.9103 0.9246 0.9255 0.8949 0.0757
Original 8 items from McAuley et al.
Time No. of Factors Chi-Square df p-value Goodness of Fit Index CFI Non-normed Index NFI RMSEA
Baseline 1 61.9 20 < .0001 0.9620 0.9534 0.9538 0.9333 0.0710
  2 19.2 13 0.1182 0.9890 0.9932 0.9933 0.9794 0.0337
Month 6 1 140.3 20 < .0001 0.9042 0.8832 0.8841 0.8674 0.1251
  2 40.5 13 0.0001 0.9741 0.9733 0.9736 0.9617 0.0743
Month 12 1 115.5 20 < .0001 0.9219 0.9109 0.9116 0.8950 0.1118
  2 35.8 13 0.0006 0.9777 0.9788 0.9791 0.9675 0.0677
  1. a CFI: comparative fit index
  2. b NFI: normed coefficient
  3. c RMSEA: root mean squared error approximation coefficient