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 () 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)