Variable | Caries-free n (%) | Caries experience n (%) | χ 2 | P value |
---|---|---|---|---|
Total | 586 (55.2) | 475 (44.8) | ||
Sex | 14.755 | < 0.001 | ||
Male | 342 (60.7) | 221 (39.3) | ||
Female | 244 (49.0) | 254 (51.0) | ||
Ethnicity | 12.622 | 0.002 | ||
Han | 135 (49.1) | 140 (50.9) | ||
Zhuang | 178 (52.0) | 164 (48.0) | ||
Baikuyao | 273 (61.5) | 171 (38.5) | ||
Parental education level | 3.638 | 0.056 | ||
Primary school and below | 317 (58.1) | 229 (41.9) | ||
Secondary school and above | 269 (52.2) | 246 (47.8) | ||
Frequency of tooth brushing | 5.953 | 0.015 | ||
≤ once/day | 363 (58.4) | 259 (41.6) | ||
> once/day | 223 (50.8) | 216 (49.2) | ||
Frequency of sugary food intake | 10.150 | 0.001 | ||
≤ once/week | 217 (62.2) | 132 (37.8) | ||
> once/week | 369 (51.8) | 343 (48.2) | ||
Regularly eat at school | 7.025 | 0.008 | ||
Yes | 345 (58.9) | 241 (41.1) | ||
No | 241 (50.7) | 234 (49.3) |