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Table 3 Discriminant construct validity: a comparison between the CPQ mean scores of the TMD and control groups

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

   TMD group (n = 141) Control group (n = 106)   
   Mean (SD) Mean (SD) P * ES
CPQ8-10 Overall scale [0-100] 20.6 (17.7) 13.5 (15.4) < 0.0001 0.43
  Subscales     
     Oral symptoms [0-20] 7.2 (4.0) 5.2 (3.9) < 0.0001 0.55
     Functional limitations [0-20] 3.8 (4.2) 2.6 (3.8) 0.001 0.36
     Emotional well-being [0-20] 4.6 (4.7) 2.6 (4.1) < 0.0001 0.52
     Social well-being [0-40] 5.5 (7.4) 3.1 (5.9) 0.009 0.39
   TMD group (n = 176) Control group (n = 124)   
   Mean (SD) Mean (SD) P* ES
CPQ11-14 Overall scale [0-148] 27.6 (20.7) 16.3 (14.8) < 0.0001 0.62
  Subscales     
     Oral symptoms [0-24] 7.0 (4.7) 5.2 (3.5) < 0.0001 0.46
     Functional limitations [0-26] 6.5 (5.6) 3.6 (4.2) < 0.0001 0.62
     Emotional well-being [0-36] 7.9 (7.6) 4.5 (5.6) < 0.0001 0.53
     Social well-being [0-52] 5.9 (6.7) 2.9 (4.0) < 0.0001 0.56
  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