Table 5.
Correlation of dental age, chronological age, and the BMI
| Age | BMI | N | Mean | SD | Mean diff | SE of diff | p value | |
|---|---|---|---|---|---|---|---|---|
| 5–6 years | Underweight | Dental age (months) | 89.00 | 3 | 7.550 | 21.67 | 6.960 | 0.090 |
| Age (months) | 67.33 | 3 | 4.509 | |||||
| Normal | Dental age (months) | 69.00 | 2 | 7.071 | 7.50 | 3.500 | 0.278 | |
| Age (months) | 61.50 | 2 | 2.121 | |||||
| Obese | Dental age (months) | 62.00 | 3 | 2.646 | −8.67 | 1.333 | 0.023 | |
| Age (months) | 70.67 | 3 | 0.577 | |||||
| Overweight | Dental age (months) | 0 | ||||||
| Age (months) | 0 | |||||||
| 6–7 years | Underweight | Dental age (months) | 75.67 | 6 | 16.561 | −1.17 | 6.269 | 0.860 |
| Age (months) | 76.83 | 6 | 2.563 | |||||
| Normal | Dental age (months) | 87.75 | 4 | 16.215 | 8.25 | 8.128 | 0.385 | |
| Age (months) | 79.50 | 4 | 1.000 | |||||
| Obese | Dental age (months) | 111.67 | 3 | 34.078 | 37.00 | 19.655 | 0.200 | |
| Age (months) | 74.67 | 3 | 0.577 | |||||
| Overweight | Dental age (months) | 144.00 | 1 | |||||
| Age (months) | 76.00 | 1 | ||||||
| 7–8 years | Underweight | Dental age (months) | 88.33 | 6 | 12.144 | −0.33 | 5.251 | 0.952 |
| Age (months) | 88.67 | 6 | 2.733 | |||||
| Normal | Dental age (months) | 88.00 | 4 | 11.576 | −5.00 | 5.672 | 0.443 | |
| Age (months) | 93.00 | 4 | 2.582 | |||||
| Obese | Dental age (months) | 109.67 | 3 | 36.529 | 23.00 | 21.127 | 0.390 | |
| Age (months) | 86.67 | 3 | 1.155 | |||||
| Overweight | Dental age (months) | 0 | ||||||
| Age (months) | 0 | |||||||
| 8–9 years | Underweight | Dental age (months) | 115.67 | 3 | 4.619 | 11.00 | 4.509 | 0.135 |
| Age (months) | 104.67 | 3 | 3.215 | |||||
| Normal | Dental age (months) | 96.17 | 6 | 15.381 | −9.00 | 5.820 | 0.183 | |
| Age (months) | 105.17 | 6 | 3.371 | |||||
| Obese | Dental age (months) | 79.00 | 1 | |||||
| Age (months) | 107.00 | 1 | ||||||
| Overweight | Dental age (months) | 0 | ||||||
| Age (months) | 0 | |||||||
| 9–10 years | Underweight | Dental age (months) | 103.40 | 5 | 23.458 | −11.20 | 9.573 | 0.307 |
| Age (months) | 114.60 | 5 | 4.879 | |||||
| Normal | Dental age (months) | 109.00 | 13 | 24.590 | −5.54 | 6.976 | 0.443 | |
| Age (months) | 114.54 | 13 | 2.904 | |||||
| Obese | Dental age (months) | 0 | ||||||
| Age (months) | 0 | |||||||
| Overweight | Dental age (months) | 88.00 | 1 | |||||
| Age (months) | 120.00 | 1 | ||||||
| 10–11 years | Underweight | Dental age (months) | 113.00 | 9 | 14.124 | −10.89 | 4.238 | 0.033 |
| Age (months) | 123.89 | 9 | 2.147 | |||||
| Normal | Dental age (months) | 111.20 | 5 | 18.458 | −18.00 | 8.367 | 0.098 | |
| Age (months) | 129.20 | 5 | 3.114 | |||||
| Obese | Dental age (months) | 0 | ||||||
| Age (months) | 0 | |||||||
| Overweight | Dental age (months) | 0 | ||||||
| Age (months) | 0 | |||||||
| 11–12 years | Underweight | Dental age (months) | 131.00 | 3 | 19.313 | −6.00 | 12.166 | 0.671 |
| Age (months) | 137.00 | 3 | 2.646 | |||||
| Normal | Dental age (months) | 134.33 | 9 | 18.775 | −4.44 | 6.904 | 0.538 | |
| Age (months) | 138.78 | 9 | 3.734 | |||||
| Obese | Dental age (months) | 123.00 | 1 | |||||
| Age (months) | 137.00 | 1 | ||||||
| Overweight | Dental age (months) | 0 | ||||||
| Age (months) | 0 | |||||||
| 12–13 years | Underweight | Dental age (months) | 144.60 | 5 | 38.501 | −6.40 | 16.024 | 0.710 |
| Age (months) | 151.00 | 5 | 3.808 | |||||
| Normal | Dental age (months) | 137.69 | 13 | 28.271 | −14.92 | 7.704 | 0.077 | |
| Age (months) | 152.62 | 13 | 2.399 | |||||
| Obese | Dental age (months) | 127.00 | 1 | |||||
| Age (months) | 156.00 | 1 | ||||||
| Overweight | Dental age (months) | 162.67 | 3 | 22.546 | 10.00 | 12.423 | 0.505 | |
| Age (months) | 152.67 | 3 | 1.155 | |||||
| 13–14 years | Underweight | Dental age (months) | 138.00 | 3 | 22.650 | −24.00 | 13.279 | 0.212 |
| Age (months) | 162.00 | 3 | 2.646 | |||||
| Normal | Dental age (months) | 152.22 | 9 | 19.117 | −8.56 | 6.589 | 0.230 | |
| Age (months) | 160.78 | 9 | 2.635 | |||||
| Obese | Dental age (months) | 0 | ||||||
| Age (months) | 0 | |||||||
| Overweight | Dental age (months) | 87.00 | 1 | |||||
| Age (months) | 160.00 | 1 | ||||||
| 14–15 years | Underweight | Dental age (months) | 147.50 | 2 | 17.678 | −23.50 | 11.500 | 0.290 |
| Age (months) | 171.00 | 2 | 1.414 | |||||
| Normal | Dental age (months) | 154.25 | 4 | 12.816 | −19.25 | 7.409 | 0.081 | |
| Age (months) | 173.50 | 4 | 4.359 | |||||
| Obese | Dental age (months) | 0 | ||||||
| Age (months) | 0 | |||||||
| Overweight | Dental age (months) | 141.00 | 1 | |||||
| Age (months) | 180.00 | 1 |
Statistical significance among underweight children was observed in the age range of 10–11 years and among obese children in the age range of 5–6 years (p < 0.05)