Background
Methods
Statistical analysis
Results
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% |
Model 1 | Model 2 | ||
---|---|---|---|
Rate ratio | Rate ratio | ||
Age (reference: 12 years) | Age 14 years | 1.15* (1.02, 1.30) | 1.14* (1.01, 1.29) |
Age 17 years | 1.43*** (1.27, 1.62) | 1.43*** (1.27, 1.62) | |
Sex (female) | 1.45*** (1.31, 1.60) | 1.46*** (1.32, 1.61) | |
City (rural) | 1.29*** (1.16, 1.43) | 1.27*** (1.14, 1.42) | |
Ethnicity: (reference: Han) | Ethnicity Zhuang | 1.84*** (1.65, 2.04) | 1.84*** (1.65, 2.05) |
Ethnicity Yao | 0.36*** (0.30, 0.43) | 0.35*** (0.29, 0.42) | |
TV (reference: <30 minutes/day) | 30-60 minutes | 1.03 (0.90, 1.17) | 1.04 (0.91, 1.18) |
60-120 minutes | 1.22** (1.07, 1.40) | 1.23** (1.07, 1.41) | |
120-180 minutes | 1.25* (1.04, 1.49) | 1.25* (1.05, 1.50) | |
>180 minutes | 1.28** (1.06, 1.55) | 1.29** (1.07, 1.55) | |
Drink milk (reference: never) | Sometimes | 0.90 (0.77, 1.05) | |
Every day | 0.94 (0.78, 1.15) | ||
Twice a day | 0.87 (0.67, 1.14) | ||
Breakfast (Have breakfast most days) | 0.96 (0.82, 1.12) |
Model 1 | Model 2 | ||
---|---|---|---|
Rate ratio | Rate ratio | ||
Age (reference: 12 years) | Age 14 years | 1.11 (0.98, 1.27) | 1.09 (0.96, 1.24) |
Age 17 years | 1.28*** (1.12, 1.45) | 1.27*** (1.12, 1.45) | |
Sex (female) | 1.40*** (1.26, 1.56) | 1.42*** (1.28, 1.57) | |
City (rural) | 1.49*** (1.33, 1.66) | 1.47*** (1.31, 1.65) | |
Ethnicity: (reference: Han) | Ethnicity Zhuang | 1.61*** (1.44, 1.80) | 1.60*** (1.43, 1.78) |
Ethnicity Yao | 0.32*** (0.27, 0.39) | 0.31*** (0.26, 0.38) | |
TV (reference: <30 minutes/day) | 30-60 minutes | 1.04 (0.90, 1.19) | 1.04 (0.91, 1.20) |
60-120 minutes | 1.24** (1.07, 1.43) | 1.24** (1.07, 1.43) | |
120-180 minutes | 1.26* (1.04, 1.52) | 1.26* (1.04, 1.52) | |
>180 minutes | 1.26* (1.04, 1.54) | 1.26* (1.04, 1.54) | |
Drink milk (reference: never) | Sometimes | 0.91 (0.77, 1.07) | |
Every day | 0.94 (0.77, 1.17) | ||
Twice a day | 0.84 (0.64, 1.12) | ||
Breakfast (Have breakfast most days) | 0.87 (0.75, 1.03) |