Table 2.
Characteristics of the study samples: mean (range) or percentage, %
| sample | N | female sex | age, years | caries prevalencea | dft/DMFTb | fluoridated water (%) | daily tooth brushing | tooth brushing per day |
|---|---|---|---|---|---|---|---|---|
| children | ||||||||
| COHRA1 whites | 608 | 46.7 | 7.3 (3.0-12.0) | 55.4 | 2.3 (0-17) | 60.2 | 92.8 | 1.6 (0-4) |
| COHRA1 blacks | 81 | 46.9 | 7.6 (3.2-11.8) | 49.4 | 1.8 (0-8) | 86.8 | 95.1 | 1.6 (0-3) |
| IHS whites | 41 | 58.5 | 4.1 (3.2-5.3) | 80.5 | 6.3 (0-20) | - | - | - |
| IHS blacks | 23 | 52.2 | 4.3 (3.4-5.6) | 82.6 | 5.7 (0-17) | - | - | - |
| IFS whites | 136 | 48.5 | 5.2 (4.4-6.8) | 37.8 | 1.2 (0-16) | 73.6 | 88.6 | 1.4 (0-3) |
| adults | ||||||||
| COHRA1 whites | 994 | 62.8 | 34.3 (18.0-75.0) | 96.5 | 10.5 (0-28) | 58.8 | 89.3 | 1.5 (0-2) |
| COHRA1 blacks | 86 | 70.9 | 36.2 (18.2-60.8) | 94.2 | 9.3 (9-28) | 88.0 | 92.3 | 1.5 (0-2) |
| Dental SCORE whites | 277 | 63.2 | 64.0 (48.0-78.0) | 100.0 | 16.4 (2-28) | - | - | - |
| Dental SCORE blacks | 225 | 72.9 | 61.6 (47.0-79.0) | 100.0 | 14.8 (1-28) | - | - | - |
| DRDR whites | 702 | 50.0 | 43.0 (18.0-74.8) | 97.9 | 16.6 (0-28) | - | - | - |
| DRDR blacks | 173 | 57.8 | 44.5 (18.0-74.4) | 98.3 | 16.5 (0-28) | - | - | - |
| CEDAR whites | 173 | 31.2 | 20.4 (15.7-28.6) | 82.1 | 5.4 (0-21) | - | - | - |
| CEDAR blacks | 68 | 44.3 | 20.2 (15.6-27.8) | 88.6 | 6.4 (0-16) | - | - | - |
a
caries prevalence was defined as dfs ≥ 1 in children or DMFT ≥ 1 in adults
b
dft was the measure of caries experience of the primary dentition in child samples; DMFT was the measure of caries experience of the permanent dentition in adult samples