Table 2.
Tooth fracture experience in the past 12 months.
| Grade | Total | Male | Female | p-Value * | |||
|---|---|---|---|---|---|---|---|
| N | % | N | % | N | % | ||
| All | 60,040 | 11.4 | 30,463 | 11.8 | 29,577 | 11.1 | 0.023 |
| Middle school | |||||||
| Grade 1 | 9847 | 11.0 | 4960 | 11.8 | 4887 | 10.1 | 0.011 |
| Grade 2 | 10,092 | 11.2 | 5137 | 11.4 | 4955 | 10.9 | 0.505 |
| Grade 3 | 10,290 | 11.5 | 5231 | 11.3 | 5059 | 11.7 | 0.611 |
| High school | |||||||
| Grade 1 | 9260 | 11.4 | 4805 | 12.0 | 4455 | 10.8 | 0.080 |
| Grade 2 | 10,039 | 10.9 | 5110 | 11.2 | 4929 | 10.5 | 0.251 |
| Grade 3 | 10,512 | 12.5 | 5220 | 12.7 | 5292 | 12.4 | 0.626 |
| p-Value * | 0.009 | 0.207 | 0.007 | ||||
* Complex-samples chi-squared test; N: unweighted value, %: tooth fracture experience, weighted value; age of adolescents: grade 1 of middle school, 12 years; grade 3 of high school, 15 years.