Table 3.
Discriminant construct validity: a comparison between the CPQ mean scores of the TMD and control groups
| 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 | |
TMD, temporomandibular disorder; CPQ, child perceptions questionnaire
Values in square brackets indicate range of possible scores
* P-values obtained from Mann-Whitney test
† ES = Effect sizes, difference in group means/pooled SD