Table 1: Dental age (DA), chronological age (CA), and difference between dental age and chronological age.

Age groupGenderMean (SD)95% CI value
CA (SD)DA (SD)DA − CA (SD)DA–CA

4.00–4.99M (7)4.62 (0.23)5.37 (0.26)0.75 (0.18)0.58–0.930.000
F (9)4.66 (0.14)5.57 (0.68)0.90 (0.72)0.34–1.460.006
5.00–5.99M (12)5.77 (0.10)6.60 (0.80)0.83 (0.79)0.33–1.330.004
F (20)5.63 (0.34)6.90 (0.77)1.26 (0.66)0.95–1.580.000
6.00–6.99M (26)6.46 (0.22)7.50 (0.35)1.04 (0.35)0.90–1.180.000
F (22)6.35 (0.28)7.49 (0.25)1.13 (0.45)0.93–1.330.000
7.00–7.99M (28)7.43 (0.25)8.08 (0.46)0.66 (0.42)0.5–0.820.000
F (40)7.41 (0.29)8.40 (0.83)0.98 (0.69)0.76–1.200.000
8.00–8.99M (26)8.40 (0.24)9.10 (0.83)0.70 (0.98)0.29–1.090.058
F (38)8.38 (0.30)8.80 (0.75)0.42 (0.69)0.19–0.650.001
9.00–9.99M (30)9.43 (0.31)10.40 (0.98)0.97 (0.85)0.65–1.280.000
F (24)9.42 (0.30)9.78 (0.82)0.36 (0.83)0.01–0.710.044
10.00–10.99M (30)10.54 (0.33)11.76 (0.51)1.21 (0.56)1.00–1.420.000
F (24)10.53 (0.35)11.59 (0.61)1.05 (0.70)0.75–1.350.000
11.00–11.99M (16)11.37 (0.17)11.55 (1.09)0.17 (1.05)−0.38–0.730.523
F (6)11.36 (0.12)11.90 (0.46)0.53 (0.42)0.09–0.970.026
12.00–12.99M (30)12.40 (0.31)13.10 (1.27)0.69 (1.18)0.25–1.140.003
F (12)12.45 (0.26)13.20 (1.15)0.74 (1.05)0.07–1.410.033
13.00–13.99M (12)13.62 (0.30)13.50 (0.81)−0.12 (0.69)−0.56–0.320.557
F (10)13.32 (0.30)14.40 (1.17)1.08 (1.06)0.31–1.840.011

TotalM (217)9.27 (2.43)10.04 (2.44)0.76 (0.85)0.65–0.880.000
F (205)8.48 (2.27)9.31 (2.30)0.83 (0.78)0.72–0.940.000

TOTALM + F (422)8.89 (2.38)9.69 (2.40)0.80 (0.82)0.72–0.870.000