Table 3.

Mean difference (±standard deviation) between dental age based on the Demirjian method and chronological age as determined by the different methods in girls.

Age group (n)	French-Canadian (SD)	Belgian (SD)	Kuwaiti (SD)	Saudi (SD)
4-5 (9)	0.90 (0.72)	−0.36 (1.41)	0.62 (0.52)	NA
5-6 (20)	1.26 (0.66)	1.38 (1.36)	0.95 (0.69)	NA
6-7 (22)	1.13 (0.45)	1.96 (0.85)	0.92 (0.62)	NA
7-8 (40)	0.98 (0.65)	2.82 (1.22)	1.24 (0.82)	1.51 (0.57)
8-9 (38)	0.42 (0.69)	2.73 (0.83)	0.76 (0.53)	0.90 (0.57)
9-10 (24)	0.36 (0.83)	2.95 (1.02)	0.56 (0.67)	0.60 (0.65)
10-11 (24)	1.05 (0.70)	3.28 (0.68)	0.50 (0.90)	0.76 (0.56)
11-12 (6)	0.53 (0.42)	2.68 (0.04)	0.15 (0.34)	0.17 (0.27)
12-13 (12)	0.74 (1.05)	2.03 (0.47)	0.25 (1.35)	−0.09 (0.98)
13-14 (10)	1.08 (1.06)	1.79 (0.41)	−0.15 (1.34)	0.88 (1.43)
Total (205)	0.83 (0.78)	2.40 (1.26)	0.74 (0.85)	0.84 (0.84)