Table 1.
Mean and proportion of characteristics (n = 600).
Fig 1.
Final path diagrams of one-factor models for the PDI-J and PDI-5-J in chronic low back pain and chronic daily headache.
One-factor models of the PDI-J and PDI-5-J with factor loadings and error terms (e1-e7 in PDI-J and e1-e5 in PDI-5-J) are indicated. The left side represents the chronic low back pain, and the right side represents the chronic daily headache. Abbreviation: PDI-J; Japanese version of the Pain Disability Index, PDI-5-J; Japanese version of the 5-item Pain Disability Index.
Table 2.
Goodness-of-fit indices (one-factor solution) for the confirmatory factor analyses of PDI-J and PDI-5-J.
Table 3.
Pearson’s correlations coefficient (95% confidence interval).