Table 2 Age-wise comparison of the mean dental age (using Nolla’s method) and mean chronological age in all the six age groups to understand the trend of growth in boys compared to girls as well as to the entire group
All subjects | Female subjects | Male subjects | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Group | No. of subjects (n) | DA (months) mean±SD | CA (months) mean±SD | DA-CA (months) mean±SD | No. of subjects (n) | DA (months) mean±SD | CA (months) mean±SD | DA-CA (months) mean±SD | No. of subjects (n) | DA (months) mean±SD | CA (months) mean±SD | DA-CA (months) mean±SD |
Group I | 238 | 115.9±7.7 | 122.9±3.3 | − 6.9±5.5 | 58 | 117.9±7.1 | 123.7±3.7 | − 5.9±4.5 | 180 | 115.3±7.9 | 122.6±3.1 | − 7.4±5.9 |
Group II | 95 | 134.2±4.8 | 136.5±2.9 | − 2.3±4.1 | 69 | 133.6±4.4 | 136.3±2.4 | − 2.7±4.2 | 26 | 135.9±5.6 | 137.1±3.9 | − 1.3±3.6 |
Group III | 126 | 148.8±5.1 | 149.4±3.7 | − 0.6±3.3 | 70 | 149.0±5.5 | 149.7±3.7 | − 0.7±3.4 | 56 | 148.7±4.6 | 149.1±3.7 | − 0.4±3.3 |
Group IV | 136 | 162.5±5.6 | 162.3±3.7 | 0.2±3.7 | 109 | 162.7±5.7 | 162.6±3.7 | 0.2±3.6 | 27 | 161.7±5.4 | 161.3±3.4 | 0.4±4.0 |
Group V | 98 | 172.5±5.8 | 173.1±3.6 | − 0.6±3.7 | 39 | 169.2±5.4 | 170.9±2.6 | − 1.7±4.0 | 59 | 174.7±4.6 | 174.6±3.4 | 0.1±3.6 |
Group VI | 207 | 189.9±6.7 | 188.1±3.9 | 1.8±4.1 | 97 | 190.9±2.9 | 189.5±2.4 | 1.4±2.4 | 110 | 189.1±8.8 | 186.9±4.5 | 2.2±5.3 |
Total | 900 | 152.7±28.5 | 154.4±24.9 | − 1.8±5.5 | 442 | 156.9±24.4 | 157.9±22.1 | − 1.1±4.2 | 458 | 148.6±31.5 | 151.1±27.0 | − 2.5±6.4 |