表4.
5岁及12岁儿童2014年和2016年两次调查结果的比较
Comparison of the two surveys for children aged 5 years and 12 years in 2014 and 2016
| Group | 5-year-old | 12-year-old | ||||||
| Number | dmft, M (P25, P75) |
Caries prevalence rate of deciduous teeth | Number | dmft, M (P25, P75) |
DMFT, M (P25, P75) |
Caries prevalence rate of first permanent molar | ||
| Abbreviations as in Table 2. | ||||||||
| Year 2014 | 173 | 3 (0, 6) | 75.7% | 65 | 1 (0, 2) | 0 (0, 1) | 36.9% | |
| Year 2016 | 179 | 2 (0, 4) | 71.5% | 104 | 1 (0, 2) | 0 (0, 1) | 26.9% | |
| Z or χ2 value | Z=-2.075 | χ2=0.804 | Z=-1.243 | Z=-1.502 | χ2=1.878 | |||
| P value | 0.038 | 0.370 | 0.214 | 0.133 | 0.171 | |||