Skip to main content

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

From: Dental age assessment of North Indian origin children using Nolla’s method in mandibular second molar

  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