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Table 7 Confirmatory factor analysis – goodness of fit (n = 756)

From: Reliability and validity of Oswestry Disability Index among patients undergoing lumbar spinal surgery

Fit statistic

Value

Likelihood ratio

98.154

 chi2_bs(45)

2828.010

 p > chi2

0.000

Population error

 Root mean squared error of approximation (RMSEA)

0.053

 RMSEA 90% CI, lower bound

0.042

 RMSEA 90% CI, upper bound

0.066

 Probability RMSEA < = 0.05

0.298

Information criteria

 Akaike’s information criterion (AIC)

22320.515

 Bayesian information criterion (BIC)

22478.003

Baseline comparison

 Comparative fit index (CFI)

0.976

 Tucker-Lewis index (TLI)

0.965

Size of residuals

 Standardized root mean squared residual (SRMR)

0.034

 Coefficient of determination (CD)

0.874