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Table 2 Criterion validity: correlations between the CPQ scores and variable pain (Question 3, RDC/TMD Axis II) for TMD groups

From: Evaluating oral health-related quality of life measure for children and preadolescents with temporomandibular disorder

TMD groups   Pain variable
   r a P
CPQ8-10 Total scale 0.14 0.089
n = 141 Subscales   
     Oral symptoms 0.13 0.106
     Functional limitations 0.18 0.024
     Emotional well-being 0.06 0.476
     Social well-being 0.09 0.278
CPQ11-14 Total scale 0.32 < 0.0001
n = 176 Subscales   
     Oral symptoms 0.33 < 0.0001
     Functional limitations 0.26 0.000
     Emotional well-being 0.24 0.001
     Social well-being 0.27 0.000
  1. TMD, temporomandibular disorder; CPQ, child perceptions questionnaire
  2. a Spearman's correlation coefficient