Table 2.
Subgroup analysis for the association of BMI and risk of childhood dental caries
| Variables | Subgroups | Number of effect sizes | OR* | 95% CI | I2 (%) |
|---|---|---|---|---|---|
| Study location | Asian-countries | 6 | 1.70 | 1.25, 2.32 | 94.6 |
| European-countries | 3 | 0.81 | 0.36, 1.81 | 0.0 | |
| America-countries | 7 | 1.28 | 0.91, 1.81 | 79.6 | |
| Country population | Big country | 9 | 1.56 | 1.09, 2.21 | 85.2 |
| Small country | 7 | 1.31 | 0.95, 1.81 | 92.4 | |
| Participants’ age | Aged <7 years | 9 | 1.59 | 1.22, 2.07 | 85.3 |
| Aged between 7 and 15 years | 7 | 1.25 | 0.87, 1.81 | 84.1 | |
| Adjustment for sex | Yes | 10 | 1.30 | 0.99, 1.71 | 91.2 |
| No | 6 | 1.74 | 1.13, 2.68 | 83.1 | |
| Adjustment for age | Yes | 6 | 1.04 | 0.84, 1.30 | 41.9 |
| No | 10 | 1.68 | 1.29, 2.18 | 87.2 | |
| Study design | Cross-sectional | 9 | 1.58 | 1.20, 2.08 | 92.6 |
| Case control | 4 | 1.31 | 0.77, 2.22 | 82.4 | |
| Cohort | 3 | 1.27 | 1.07, 1.56 | 0.0 | |
| Study sample size | Less than 900 | 8 | 1.25 | 0.77, 2.02 | 75.1 |
| More than 900 | 8 | 1.59 | 1.25, 2.02 | 92.1 |
*Obtained from Fixed-effect model