Measurement
(mm)
Group (years) Right Left
N Mean (SD) Median (min; max) P-valuea N Mean (SD) Median (min; max) P-valuea
CS - NCF Group 1 (18 to 30) 26 15.49 (0.47) 15.7 (9.8; 20.7) 0.671 15 14.97 (0.93) 15.3 (6.1; 23) 0.212
Group 2 (31 to 43) 75 15.37 (0.35) 15.4 (4.5; 21.8) 73 15.28 (0.39) 16 (5.5; 23)
Group 3 (44 to 56) 45 15.5 (0.62) 16.4 (4.8; 24) 50 16.36 (0.47) 16.45 (6.3; 22.9)
Group 4 (> 56) 38 14.88 (0.67) 15.85 (5.6; 22.1) 43 16 (0.57) 16 (7.7; 28.8)
CS - ARC Group 1 (18 to 30) 26 7.35 (0.55) 6.6 (4.8; 16.1) 0.407 15 7.54 (0.95) 6.3 (4; 15.8) 0.109
Group 2 (31 to 43) 75 7.51 (0.33) 7 (3.9; 21) 73 7.46 (0.39) 6.6 (3.8; 21.5)
Group 3 (44 to 56) 45 7.24 (0.54) 5.9 (3.7; 18.6) 50 6.74 (0.31) 6.2 (3.6; 14.9)
Group 4 (> 56) 38 8.26 (0.73) 6.3 (3.7; 20.6) 43 6.45 (0.4) 5.8 (3.7; 16.4)
CS - BCB Group 1 (18 to 30) 26 7.21 (0.2) 7.45 (5.1; 10.2) 0.348 15 7.01 (0.3) 6.8 (5; 9.2) 0.092*
Group 2 (31 to 43) 75 7.39 (0.13) 7.4 (5.1; 11) 73 7.53 (0.14) 7.5 (5.5; 12.2)
Group 3 (44 to 56) 45 7.49 (0.22) 7.3 (5.3; 12.5) 50 7.07 (0.16) 7 (4.9; 10)
Group 4 (> 56) 38 7.76 (0.2) 7.65 (6; 10.2) 43 7.08 (0.18) 6.9 (5; 9.6)
CS - NPC Group 1 (18 to 30) 26 5.27 (0.63) 4.35 (1.4; 12.8) 0.183 15 7.65 (0.97) 8.4 (2.3; 14.2) 0.422
Group 2 (31 to 43) 75 6.49 (0.32) 7.2 (2; 14.9) 73 6.42 (0.35) 6.4 (2; 13.5)
Group 3 (44 to 56) 45 6.35 (0.45) 5.7 (2; 14.5) 50 6.42 (0.35) 7.15 (2.2; 13.3)
Group 4 (> 56) 38 7.14 (0.65) 6.5 (2; 17.6) 43 6.36 (0.51) 6.5 (2.5; 13.7)
CS Group 1 (18 to 30) 26 0.71 (0.03) 0.73 (0.4; 1.15) 0.06* 15 0.66 (0.06) 0.7 (0.22; 1.2) 0.731
Group 2 (31 to 43) 75 0.74 (0.02) 0.7 (0.4; 1.4) 73 0.75 (0.03) 0.7 (0.35; 1.65)
Group 3 (44 to 56) 45 0.77 (0.03) 0.8 (0.4; 1.2) 50 0.73 (0.03) 0.7 (0.45; 1.2)
Group 4 (> 56) 38 0.84 (0.04) 0.83 (0.35; 1.2) 43 0.71 (0.03) 0.7 (0.4; 1.25)

®Kruskal-Wallis H test. *Statistically significant at level P < 0.05.
SD = standard deviation; NCF = nasal cavity floor; BCB = buccal cortical bone; ARC = alveolar ridge crest; NPC = nasopalatine canal; N = number.