Table 1. Prevalence of dental caries in an elderly population aged 65–74 years old in northeast China.
| Urban areas | Rural areas | Both areas | |||||||
| Men | Women | Both | Men | Women | Both | Men | Women | Both | |
| Number of subjects | 583 | 594 | 1177 | 591 | 596 | 1187 | 1174 | 1190 | 2364 |
| DT | |||||||||
| Mean ± S.D. | 2.3±3.28 | 2.42±3.16 | 2.36±3.22 | 2.23±3.46 | 2.6±3.28 | 2.42±3.37 | 2.27±3.37 | 2.51±3.22 | 2.39±3.29 |
| Percentage (%) | 18.39 | 16.7 | 17.47 | 16.51 | 16.76 | 16.92 | 17.73 | 16.73 | 17.19 |
| MT | |||||||||
| Mean ± S.D. | 9.78±8.39 | 11.52±9.55 | 10.66±9.02 | 10.76±9.68 | 12.8±10.57 | 11.78±10.18 | 10.28±9.06 | 12.16±10.08 | 11.22±9.63 |
| Percentage (%) | 78.18 | 79.5 | 78.9 | 82.26 | 82.59 | 82.38 | 80.31 | 81.07 | 80.72 |
| FT | |||||||||
| Mean ± S.D. | 0.42±0.98 | 0.55±1.27 | 0.49±1.14** | 0.09±0.37 | 0.11±0.47 | 0.10±0.42 | 0.25±0.76 | 0.33±0.98 | 0.29±0.88 |
| Percentage (%) | 3.4 | 3.79 | 3.6 | 0.69 | 0.71 | 0.70 | 1.95 | 2.20 | 2.08 |
| DMFT | |||||||||
| Mean ± S.D. | 12.51±8.84 | 14.49±9.40 | 13.51±9.17 | 13.08±9.79 | 15.51±10.22 | 14.30±10.07 | 12.80±9.32 | 15.00±9.82 | 13.90±9.64 |
| DFT | |||||||||
| Mean ± S.D. | 2.72±3.42 | 2.97±3.40 | 2.85±3.41* | 2.32±3.47 | 2.71±3.29 | 2.52±3.38 | 2.52±3.44 | 2.84±3.34 | 2.68±3.40 |
| Prevalence (%) | 69.5 | 72.6 | 71.0* | 62.1 | 65.8 | 63.9 | 65.8 | 69.2 | 67.5 |
*
P<0.05 and
**
P<0.01, compared with rural areas.
Abbreviations: DT, decayed tooth; MT, missing tooth; FT, filled tooth; DMFT, decayed, missing, and filled tooth; DFT, decayed and filled tooth; S.D., standard deviation.