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Table 4 Discriminant construct validity: CPQ overall and domain scores by the RDC/TMD diagnosis and "supercontrol" groups

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

   RDC/TMD Diagnosis Group (n = 32) Supercontrol Group (n = 28)   
   Mean (SD) Mean (SD) P * ES
CPQ8-10 Overall scale [0-100] 25.6 (22.3) 7.5 (7.8) < 0.0001 0.61
  Subscales     
     Oral symptoms [0-20] 8.7 (4.6) 3.5 (3.4) < 0.0001 0.87
     Functional limitations [0-20] 4.8 (4.7) 1.3 (1.9) < 0.0001 0.58
     Emotional well-being [0-20] 4.7 (5.2) 1.1 (1.7) 0.000 0.50
     Social well-being [0-40] 7.4 (9.6) 1.7 (3.1) 0.006 0.54
   RDC/TMD Diagnosis Group (n = 69) Supercontrol Group (n = 29)   
   Mean (SD) Mean (SD) P* ES
CPQ11-14 Overall scale [0-148] 35.0 (24.1) 11.7 (9.6) < 0.0001 0.88
  Subscales     
     Oral symptoms [0-24] 8.7 (5.8) 4.2 (2.1) < 0.0001 0.74
     Functional limitations [0-26] 8.8 (7.0) 2.2 (2.9) < 0.0001 0.89
     Emotional well-being [0-36] 10.0 (8.9) 3.1 (4.1) < 0.0001 0.73
     Social well-being [0-52] 7.5 (6.8) 2.1 (3.4) < 0.0001 0.82
  1. TMD, temporomandibular disorder; CPQ, child perceptions questionnaire
  2. Values in square brackets indicate range of possible scores
  3. * P-values obtained from Mann-Whitney test
  4. † ES = Effect sizes, difference in group means/pooled SD