Table 2.
Demographic and Clinical Characteristics of Participants in 8 Cohorts Contributing to Dental Caries Clusters Harmonization.
| Cohort | N | Demographics | Natural Teeth | Binary Caries Case Status | Quantitative Caries Experience, Mean (SD) | Tooth Surface–Level Caries Clusters (Shaffer, Feingold, Wang, Weeks, et al. 2013), Mean (SD) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Age, Mean (SD), y | Women, % | Edentulous, % | No. of Teeth, Mean (SD) | DMTFS/T >0, n (%) | DMTFT | DMTFS | Cluster 1 | Cluster 2 | Cluster 3 | Cluster 4 | Cluster 5 | ||
| SIMPLER | 19,052 | 73.6 (8.0) | 33.7 | 1.4 | 23.2 (6.3) | 17,416 (91.4) | 14.8 (8.8) | 55.0 (35.4) | 0.65 (0.35) | 0.14 (0.28) | 0.58 (0.33) | 0.39 (0.38) | 0.38 (0.32) |
| TWINGENE/STR | 16,849 | 48.7 (19.0) | 58.2 | 0.3 | 26.0 (3.9) | 15,893 (94.3) | 12.3 (7.9) | 35.7 (31.4) | 0.56 (0.35) | 0.06 (0.18) | 0.40 (0.33) | 0.21 (0.30) | 0.22 (0.27) |
| MDC/MOS | 11,176 | 67.9 (17.9) | 63.4 | 0.9 | 23.6 (5.9) | 10,874 (97.3) | 17.8 (7.5) | 62.9 (34.2) | 0.74 (0.31) | 0.17 (0.28) | 0.65 (0.32) | 0.45 (0.38) | 0.46 (0.33) |
| VIKING | 3,823 | 63.8 (8.0) | 63.4 | 0.9 | 24.7 (4.9) | 3,772 (98.7) | 17.3 (7.8) | 55.9 (31.7) | 0.73 (0.31) | 0.13 (0.23) | 0.60 (0.31) | 0.38 (0.34) | 0.37 (0.30) |
| CCDG: COHRA1/Dental SCORE | 1,810 | 43.8 (15.7) | 64.6 | 5.1 | 23.1 (7.2) | 1,763 (97.4) | 13.7 (7.3) | 44.1 (34.3) | 0.73 (0.28) | 0.10 (0.25) | 0.46 (0.34) | 0.29 (0.37) | 0.26 (0.31) |
| CCDG: COHRA2/COHRA Smile | 1,185 | 32.4 (6.2) | 100 | 0.7 | 26.4 (3.7) | 1,109 (93.6) | 8.7 (6.4) | 22.7 (23.7) | 0.53 (0.33) | 0.03 (0.12) | 0.24 (0.46) | 0.13 (0.25) | 0.11 (0.20) |
| Periogene North | 995 | 49.0 (13.1) | 57.6 | 0 | 25.6 (3.8) | 951 (95.6) | 12.0 (7.5) | 34.1 (29.8) | 0.58 (0.32) | 0.07 (0.18) | 0.38 (0.31) | 0.20 (0.30) | 0.19 (0.26) |
| IFS | 253 | 22.7 (1.8) | 56.5 | 0 | 24.7 (2.9) | 243 (96.0) | 4.0 (3.3) | 7.1 (8.9) | 0.23 (0.24) | 0.01 (0.04) | 0.05 (0.09) | 0.03 (0.09) | 0.05 (0.12) |
Mean and standard deviation (SD) of caries experience are presented for each cluster, computed as the cluster-specific decayed, missing, and filled surfaces (DMFS) divided by the number of tooth surfaces in the cluster. The labeling of caries clusters corresponds to the nomenclature of Shaffer, Feingold, Wang, Weeks, et al. (2013) as follows: cluster 1, molar pits and fissures; cluster 2, lower anterior teeth; cluster 3, molar smooth surfaces, premolar pits, and proximal surfaces; cluster 4, maxillary incisors; and cluster 5, maxillary canines and premolar smooth surfaces. A visual representation of surfaces contributing to these clusters is presented in Figure 2, and the exact derivation is presented in Appendix Table 2. DMTFS, surface level tooth morbidity index; DMTFT, tooth level tooth morbidity index.