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Table 2 Comparison of different dental arch measurements by age and gender

From: A secondary analysis to determine variations of dental arch measurements with age and gender among Ugandans

Measurement Overall mean (SD) Age group 1 mean (SD) Age group 2 mean (SD) T test (P value) Female mean (SD) Male mean (SD) T test (P value)
Maxillary
 Inter-canine distance 35.93 (2.86) 35.36 (3.10) 36.24 (2.67) −2.19 (0.03) 35.30 (2.86) 36.90 (2.60) 4.19 (<0.01)
 Second inter-premolar distance 42.64 (3.12) 41.98 (2.98) 43.00 (3.14) −2.33 (0.02) 41.84 (2.98) 43.86 (2.94) 4.95 (<0.01)
 First molar distance 48.30 (3.46) 47.52 (3.27) 48.73 (3.50) −2.5 (0.01) 47.32 (3.36) 49.82 (3.07) 5.55 (<0.01)
 Total arch length 32.68 (3.01) 32.32 (2.82) 32.89 (3.10) −1.34 (0.18) 32.24 (3.13) 33.39 (2.67) 2.8 (0.01)
 Anterior segment length 13.36 (2.07) 13.16 (2.20) 13.50 (1.99) −1.16 (0.25) 13.21 (2.11) 13.64 (2.00) 1.51 (0.13)
 Posterior segment length 20.00 (6.55) 19.16 (1.56) 20.46 (8.07) −1.41 (0.16) 19.70 (6.34) 20.47 (6.89) 0.85 (0.40)
Mandibular
 Inter-canine distance 27.06 (2.71) 26.72 (3.01) 27.24 (2.53) −1.35 (0.18) 13.20 (2.11) 27.86 (2.67) 3.58 (<0.01)
 Second inter-premolar distance 36.55 (3.28) 36.04 (3.51) 36.84 (3.13) −1.73 (0.09) 35.60 (2.94) 38.04 (3.25) 5.76 (<0.01)
 First molar distance 41.72 (4.14) 41.14 (3.11) 42.05 (4.62) −1.53 (0.13) 40.72 (4.47) 43.19 (3.09) 4.35 (<0.01)
 Total arch length 29.35 (3.09) 28.73 (2.91) 27.72 (3.15) −2.23 (0.03) 29.88 (3.22) 29.00 (2.95) 2.01 (0.05)
 Anterior segment length 9.26 (2.43) 9.08 (1.93) 9.36 (2.67) −0.82 (0.42) 10.04 (2.97) 8.76 (1.86) 3.97 (<0.01)
 Posterior segment length 25.57 (18.91) 22.37 (13.67) 27.31 (21.06) −1.86 (0.06) 26.62 (20.28) 23.95 (16.55) −1.02 (0.31)