Dental Maturity in Saudi Children Using the Demirjian Method: A Comparative Study and New Prediction Models

Table 1

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

Age group	Gender	Mean (SD)			95% CI	𝑃 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