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. 2012 Apr 1;3(1):e5. doi: 10.5037/jomr.2012.3105

Table 1.

Statistical summary of preoperative characteristics of patients undergoing bimaxillary advancement surgery due to sleep apnea syndrome (OSAS)

Group Gender, %
Age, years
M (SD)
Occlusion, %
Male Female Normal Mandibular
retrognathia
Bimaxillary
retrognathia
A (n = 7) 100 66.7 52.2 (8.3) 28.6 57.1 14.3

B (n = 6) 0 33.7 44.0 (4.7) 0 83.3 16.7

P value 0.2a 0.03b χ2 = 2.0; df = 2; P = 0.7c

aBy Fisher's Exact Test.

bBy Mann-Whitney test.

cBy Chi-Square test.

M (SD) = mean (standard deviation).