Table 1 Distribution of explanatory variables within groups by caries experience
Percentage | ||||
|---|---|---|---|---|
Total | Within caries groups (DMFT = 1 or more) | |||
Yes | No | |||
Sex | Females | 49.9% | 55.1% | 44.0% |
Males | 50.1% | 44.9% | 56.0% | |
Age | 12 years | 32.8% | 31.1% | 34.6% |
14 years | 33.2% | 32.6% | 33.9% | |
17 years | 34.0% | 36.4% | 31.5% | |
Ethnicity | Han | 50.9% | 45.1% | 57.2% |
Zhuang | 34.2% | 46.1% | 21.2% | |
Yao | 14.9% | 8.8% | 21.6% | |
Area of residence | Rural | 57.7% | 56.1% | 59.5% |
Urban | 42.3% | 43.9% | 40.5% | |
Watch TV | <30 minutes/day | 36.0% | 34.1% | 38.0% |
30-60 minutes/day | 25.0% | 24.9% | 25.2% | |
60-120 minutes/day | 21.3% | 21.5% | 21.1% | |
120-180 minutes/day | 9.3% | 10.5% | 8.0% | |
>180 minutes/day | 8.4% | 9.0% | 7.7% | |
Eat breakfast | Everyday | 85.6% | 86.6% | 84.7% |
Less often | 14.3% | 13.4% | 15.3% | |
Milk consumption | Never | 12.6% | 11.7% | 13.6% |
Sometimes | 65.1% | 66.4% | 63.6% | |
Once/day | 17.0% | 16.8% | 17.1% | |
More than once/day | 5.3% | 5.0% | 5.7% | |