Table 1:
Dental age (DA), chronological age (CA), and difference between dental age and chronological age.
Age group
Gender
Mean (SD)
95% CI
value
CA (SD)
DA (SD)
DA − CA (SD)
DA–CA
4.00–4.99
M (7)
4.62 (0.23)
5.37 (0.26)
0.75 (0.18)
0.58–0.93
0.000
F (9)
4.66 (0.14)
5.57 (0.68)
0.90 (0.72)
0.34–1.46
0.006
5.00–5.99
M (12)
5.77 (0.10)
6.60 (0.80)
0.83 (0.79)
0.33–1.33
0.004
F (20)
5.63 (0.34)
6.90 (0.77)
1.26 (0.66)
0.95–1.58
0.000
6.00–6.99
M (26)
6.46 (0.22)
7.50 (0.35)
1.04 (0.35)
0.90–1.18
0.000
F (22)
6.35 (0.28)
7.49 (0.25)
1.13 (0.45)
0.93–1.33
0.000
7.00–7.99
M (28)
7.43 (0.25)
8.08 (0.46)
0.66 (0.42)
0.5–0.82
0.000
F (40)
7.41 (0.29)
8.40 (0.83)
0.98 (0.69)
0.76–1.20
0.000
8.00–8.99
M (26)
8.40 (0.24)
9.10 (0.83)
0.70 (0.98)
0.29–1.09
0.058
F (38)
8.38 (0.30)
8.80 (0.75)
0.42 (0.69)
0.19–0.65
0.001
9.00–9.99
M (30)
9.43 (0.31)
10.40 (0.98)
0.97 (0.85)
0.65–1.28
0.000
F (24)
9.42 (0.30)
9.78 (0.82)
0.36 (0.83)
0.01–0.71
0.044
10.00–10.99
M (30)
10.54 (0.33)
11.76 (0.51)
1.21 (0.56)
1.00–1.42
0.000
F (24)
10.53 (0.35)
11.59 (0.61)
1.05 (0.70)
0.75–1.35
0.000
11.00–11.99
M (16)
11.37 (0.17)
11.55 (1.09)
0.17 (1.05)
−0.38–0.73
0.523
F (6)
11.36 (0.12)
11.90 (0.46)
0.53 (0.42)
0.09–0.97
0.026
12.00–12.99
M (30)
12.40 (0.31)
13.10 (1.27)
0.69 (1.18)
0.25–1.14
0.003
F (12)
12.45 (0.26)
13.20 (1.15)
0.74 (1.05)
0.07–1.41
0.033
13.00–13.99
M (12)
13.62 (0.30)
13.50 (0.81)
−0.12 (0.69)
−0.56–0.32
0.557
F (10)
13.32 (0.30)
14.40 (1.17)
1.08 (1.06)
0.31–1.84
0.011
Total
M (217)
9.27 (2.43)
10.04 (2.44)
0.76 (0.85)
0.65–0.88
0.000
F (205)
8.48 (2.27)
9.31 (2.30)
0.83 (0.78)
0.72–0.94
0.000
TOTAL
M + F (422)
8.89 (2.38)
9.69 (2.40)
0.80 (0.82)
0.72–0.87
0.000