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Table 2 Mean, standard deviation, maximum, minimum and p-values of statistical tests (2 sample t-test) of facial proportion indices

From: Frontal facial proportions of 12-year-old southern Chinese: a photogrammetric study

  Male (n = 133) Female (n = 137)  
  Mean SD Min. Max. Mean SD Min. Max. P-value
Upper face-face height index 63.27 2.58 56.73 70.79 63.92 2.36 58.35 70.19 0.031*
Lower face-face height index 56.75 2.44 50.34 62.69 55.25 2.59 48.06 60.95 0.000***
Mandibulo-face height index 36.73 2.58 29.21 43.27 36.08 2.36 29.81 41.65 0.031*
Mandibulo-upper face height index 58.33 6.54 41.25 76.26 56.66 5.80 42.47 71.37 0.028*
Mandibulo-lower face height index 64.69 2.83 57.98 72.07 65.29 2.63 58.64 70.64 0.075
Nasal index 77.12 5.69 64.32 93.83 73.99 6.54 60.70 93.94 0.000***
Upper lip height-mouth width index 52.02 6.47 37.09 71.21 49.36 6.21 36.46 67.05 0.001**
Cutaneous-total upper lip height index 62.16 6.84 40.72 77.17 61.99 6.82 44.58 77.63 0.838
Vermilion-total upper lip height index 37.84 6.84 22.83 59.28 38.01 6.82 22.37 55.42 0.837
Vermilion-cutaneous upper lip height index 63.00 19.83 29.58 145.59 63.30 18.37 28.81 124.32 0.898
Vermilion height index 76.61 12.08 55.26 120.75 82.21 19.80 44.59 175.00 0.005**
Chin-mandible height index 58.12 5.57 42.44 73.39 58.78 6.03 43.22 79.72 0.352
Upper face height-biocular width index 85.33 5.01 73.41 98.37 86.92 4.54 74.69 98.24 0.007**
Intercanthal-nasal width index 95.22 6.70 79.48 112.82 95.37 7.75 77.32 113.96 0.871
Nose -face height index 43.25 2.44 37.31 49.66 44.75 2.59 39.05 51.94 0.000***
Nose-mouth width index 86.22 7.03 68.69 109.87 84.70 7.02 70.98 109.49 0.075
Upper lip-upper face height index 31.65 2.31 25.60 37.19 30.02 2.55 24.28 35.99 0.000***
Upper lip-mandible height index 54.87 6.76 38.75 72.48 53.42 6.22 41.57 70.55 0.067
Upper lip-nose height index 46.46 4.96 34.41 59.21 43.08 5.26 32.07 56.23 0.000***
Lower lip-face height index 27.05 3.43 17.07 35.81 26.87 3.80 12.91 36.22 0.693
Lower lip-mandible height index 41.88 5.57 26.61 57.56 41.22 6.03 20.28 56.79 0.352
Lower lip-chin height index 73.66 17.05 36.25 135.63 71.94 18.03 25.44 131.40 0.421
  1. *P-value<0.05, **P-value<0.01, ***P-value<0.001