Table 3.
Dental injuries in high school students
| Variable | n (%) | Dental injury | Injury rate* | RR1† (95% CI) | P-value |
|---|---|---|---|---|---|
| Boys | |||||
| Total number of students‡ | 244,804 (100) | 212§ | 0.87 | 1 | |
| Members of school sports clubs | 140,696 (57.5) | 318¶ | 2.26 | 2.6 (2.2–3.1) | <0.001 |
| Girls | |||||
| Total number of students‡ | 240,735 (100) | 90§ | 0.37 | 1 | |
| Members of school sports clubs | 69,250 (28.8) | 71¶ | 1.03 | 2.7 (2.0–3.7) | <0.001 |
95% CI, 95% confidence interval; n, number of students; RR1, rate ratio.
*
Per 1,000 students.
†
[(total number of dental injuries incurred during participation in school sports clubs / total number of members of school sports clubs) × 1,000] ÷ [(total number of dental injuries occurring outside school sports clubs / total number of students) × 1,000].
‡
Students who had and had not joined the school sports club.
§
Outside school sports clubs.
¶
During school sports clubs.