Table 2 Sociodemographic characteristics and caries experience of participants from the original CARIES-QC validation study (dataset used to undertake Rasch analysis and classical psychometric testing in the present study) and the qualitative validation of the preliminary classification system derived from CARIES-QC
|  | CARIES-QC validation dataset used for Rasch and classical psychometric analyses (n = 200) | Qualitative validation of preliminary classification system (n = 20) | ||
|---|---|---|---|---|
Age (years) | Mean: 8.1 | Range: 5–16 | Mean: 10.1 | Range: 6–15 |
Gender | ||||
 Male | 95 | (47.5%) | 6 | (30.0%) |
 Female | 105 | (52.5%) | 14 | (70.0%) |
Ethnicity | ||||
 Asian background | 31 | (15.5%) | 2 | (10.0%) |
 Black background | 5 | (2.5%) | 1 | (5.0%) |
 Mixed background | 9 | (4.5%) | 2 | (10.0%) |
 White British background | 130 | (65.0%) | 14 | (70.0%) |
 Other background | 9 | (4.5%) | 1 | (5.0%) |
 Unknown background | 16 | (8.0%) | 0 | (0.0%) |
Socioeconomic status | ||||
 Most deprived | 119 | (59.5%) | 10 | (50.0%) |
 More deprived | 37 | (18.5%) | 0 | (0.0%) |
 Average | 20 | (10.0%) | 3 | (15.0%) |
 Less deprived | 13 | (6.5%) | 3 | (15.0%) |
 Least deprived | 11 | (5.5%) | 4 | (20.0%) |
Total dmft | Mean: 6.24 (SD: 3.45) | Range: 0–16 | Mean: 2.85 (SD: 3.05) | Range: 0–12 |
Total DMFT | Mean: 1.57 (SD: 2.18) | Range: 0–13 | Mean: 1.7 (SD: 2.88) | Range: 0–11 |