Table 5. The associations of relevant variables with caries risk in different tooth location.
| Teeth | Variable | Total (n = 1222842) | Boy (n = 644248) | Girl (n = 578494) | |
|---|---|---|---|---|---|
| OR (95% CI) | p | OR (95% CI) | OR (95% CI) | ||
| #16 | Gender | ||||
| Boy | Ref | -- | -- | -- | |
| Girl | 1.35 (1.34~1.37) | <0.0001 | -- | -- | |
| Calendar year | |||||
| 2013 | Ref | -- | -- | -- | |
| 2014 | 1.29 (1.26~1.33) | <0.0001 | 1.31 (1.25~1.36) | 1.28 (1.23~1.33) | |
| 2015 | 1.2 (1.17~1.24) | <0.0001 | 1.21 (1.16~1.27) | 1.2 (1.15~1.25) | |
| 2016 | 1.41 (1.37~1.45) | <0.0001 | 1.42 (1.36~1.48) | 1.4 (1.35~1.46) | |
| 2017 | 1.66 (1.61~1.71) | <0.0001 | 1.64 (1.56~1.72) | 1.68 (1.61~1.75) | |
| Region | |||||
| Middle | Ref | -- | -- | -- | |
| East | 1.7 (1.67~1.74) | <0.0001 | 1.74 (1.69~1.79) | 1.67 (1.63~1.72) | |
| South | 1.53 (1.5~1.56) | <0.0001 | 1.55 (1.51~1.6) | 1.51 (1.47~1.56) | |
| West | 0.74 (0.72~0.76) | <0.0001 | 0.76 (0.73~0.8) | 0.72 (0.69~0.75) | |
| North | 0.84 (0.82~0.86) | <0.0001 | 0.86 (0.83~0.89) | 0.83 (0.8~0.86) | |
| Urban/rural | |||||
| Urban | Ref | -- | -- | -- | |
| Rural | 1.11 (1.1~1.13) | <0.0001 | 1.12 (1.1~1.15) | 1.11 (1.09~1.13) | |
| #26 | Gender | ||||
| Boy | Ref | -- | -- | -- | |
| Girl | 1.35 (1.34~1.37) | <0.0001 | -- | -- | |
| Calendar year | |||||
| 2013 | Ref | -- | -- | -- | |
| 2014 | 1.3 (1.26~1.33) | <0.0001 | 1.29 (1.24~1.35) | 1.3 (1.25~1.35) | |
| 2015 | 1.22 (1.18~1.26) | <0.0001 | 1.21 (1.16~1.26) | 1.23 (1.18~1.28) | |
| 2016 | 1.41 (1.37~1.45) | <0.0001 | 1.4 (1.34~1.46) | 1.41 (1.36~1.47) | |
| 2017 | 1.66 (1.61~1.72) | <0.0001 | 1.64 (1.57~1.72) | 1.69 (1.62~1.76) | |
| Region | |||||
| Middle | Ref | -- | -- | -- | |
| East | 1.71 (1.68~1.74) | <0.0001 | 1.74 (1.7~1.79) | 1.68 (1.63~1.72) | |
| South | 1.56 (1.53~1.59) | <0.0001 | 1.57 (1.53~1.62) | 1.55 (1.51~1.59) | |
| West | 0.73 (0.7~0.75) | <0.0001 | 0.75 (0.72~0.79) | 0.7 (0.68~0.73) | |
| North | 0.86 (0.84~0.88) | <0.0001 | 0.86 (0.83~0.89) | 0.85 (0.82~0.88) | |
| Urban/rural | |||||
| Urban | Ref | -- | -- | -- | |
| Rural | 1.11 (1.09~1.12) | <0.0001 | 1.11 (1.09~1.14) | 1.1 (1.08~1.12) | |
| #36 | Gender | ||||
| Boy | Ref | -- | -- | -- | |
| Girl | 1.42 (1.41~1.43) | <0.0001 | -- | -- | |
| Calendar year | |||||
| 2013 | Ref | -- | -- | -- | |
| 2014 | 1.29 (1.26~1.31) | <0.0001 | 1.3 (1.26~1.34) | 1.27 (1.23~1.31) | |
| 2015 | 1.22 (1.19~1.24) | <0.0001 | 1.22 (1.18~1.26) | 1.22 (1.18~1.25) | |
| 2016 | 1.43 (1.4~1.46) | <0.0001 | 1.44 (1.39~1.49) | 1.42 (1.38~1.47) | |
| 2017 | 1.61 (1.57~1.65) | <0.0001 | 1.61 (1.55~1.67) | 1.61 (1.56~1.66) | |
| Region | |||||
| Middle | Ref | -- | -- | -- | |
| East | 1.79 (1.76~1.82) | <0.0001 | 1.81 (1.77~1.85) | 1.77 (1.73~1.81) | |
| South | 1.55 (1.52~1.57) | <0.0001 | 1.56 (1.53~1.6) | 1.53 (1.5~1.57) | |
| West | 0.75 (0.74~0.77) | <0.0001 | 0.76 (0.73~0.79) | 0.75 (0.73~0.77) | |
| North | 0.88 (0.86~0.9) | <0.0001 | 0.88 (0.85~0.9) | 0.88 (0.86~0.91) | |
| Urban/rural | |||||
| Urban | Ref | -- | -- | -- | |
| Rural | 1.13 (1.12~1.14) | <0.0001 | 1.14 (1.12~1.16) | 1.12 (1.1~1.14) | |
| #46 | Gender | ||||
| Boy | Ref | -- | -- | -- | |
| Girl | 1.41 (1.4~1.42) | <0.0001 | -- | -- | |
| Calendar year | |||||
| 2013 | Ref | -- | -- | -- | |
| 2014 | 1.29 (1.26~1.32) | <0.0001 | 1.33 (1.28~1.37) | 1.27 (1.23~1.31) | |
| 2015 | 1.23 (1.2~1.26) | <0.0001 | 1.25 (1.21~1.29) | 1.21 (1.17~1.25) | |
| 2016 | 1.45 (1.42~1.49) | <0.0001 | 1.48 (1.43~1.53) | 1.43 (1.39~1.48) | |
| 2017 | 1.62 (1.58~1.66) | <0.0001 | 1.64 (1.59~1.71) | 1.6 (1.55~1.66) | |
| Region | |||||
| Middle | Ref | -- | -- | -- | |
| East | 1.81 (1.78~1.83) | <0.0001 | 1.82 (1.78~1.86) | 1.79 (1.75~1.83) | |
| South | 1.57 (1.54~1.59) | <0.0001 | 1.58 (1.55~1.62) | 1.55 (1.52~1.58) | |
| West | 0.77 (0.75~0.79) | <0.0001 | 0.77 (0.75~0.8) | 0.76 (0.74~0.79) | |
| North | 0.88 (0.87~0.9) | <0.0001 | 0.88 (0.86~0.9) | 0.88 (0.86~0.91) | |
| Urban/rural | |||||
| Urban | Ref | -- | -- | -- | |
| Rural | 1.12 (1.11~1.13) | <0.0001 | 1.14 (1.12~1.16) | 1.1 (1.08~1.12) | |
*Multiple logistic regression model included all the variables above.