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Table 5 Model fit Exploratory Factor Analysis for WURSS-44 using 3 to 10 dimensions

From: Validation of a short form Wisconsin Upper Respiratory Symptom Survey (WURSS-21)

Dimensions Chi-square df χ2/df CFI TLI RMSEA SRMR
3 6902.7 738 9.35 .974 .970 .192 .076
4 5114.1 699 7.31 .982 .977 .167 .061
5 3946.8 661 5.97 .986 .982 .148 .050
6 2922.0 624 4.68 .990 .987 .127 .041
7r 2054.4 489 4.20 .993 .989 .119 .034
8 1785.5 553 3.22 .995 .992 .099 .029
8r 1625.9 457 3.55 .995 .992 .106 .028
9 1430.5 519 2.75 .996 .994 .088 .024
10 1165.6 486 2.39 .997 .995 .078 .021
  1. 7r and 8r = Dimensions restricted to exclude headache, loss of appetite, and sleep well,
  2. items which did not
  3. CFI = Comparative Fit Index
  4. TLI = Tuker-Lewis Index
  5. RMSEA = Root Mean Square Error of Approximation
  6. SRMR = Standardized Root Mean Square Residual
  7. Hu and Bentler (1999)[58] suggest the following cut off values for good fit, CFI > .95, TLI > .95, RMSEA < .06, and SRMR < .08