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Table 1 Intra-group association tests (Pearson’s x2, odds ratio) of the qualitative variables—group n 1 (5 to 12 years of age)

From: Dentofacial characteristics of oral breathers in different ages: a retrospective case–control study

Variables OB (n) OB % NB (n) NB % Total Pearson x 2 p value DF Lilihood x 2 OR CI 95 %
F 152 54 130 63   2.423 1.11 1 2.43   
M 125 46 80 38  
Total 277   210   487       
I 67 28 73 41        
II 156 64 84 48   10.717 0.001* 1 10672 2.02 (1.32:3.09)
III 20 8 20 11   0.057 0.811 1 0.057   
Total 243   177   420       
NMx 25 9 17 8        
PMx 181 66 146 71   0.263 0.608 1 0.264   
RMx 68 25 42 21   0.067 0.795 1 0.067   
Total 274   205   479       
NM 25 9 25 12        
PM 149 54 126 62   0.297 0.586 1 0.297   
RM 100 37 53 26   3.758 0.053* 1 3,693   
Total 274   204   478       
NM 71 26 70 34        
IM 85 32 65 32   1.164 0.281 1 1.165 1.65 (1.06; 2.58)
SM 114 42 68 34   4.898 0.027* 1 4.897   
Total 270   203   473       
NLAFH 70 26 41 20        
ILAFH 168 62 115 57   0.456 0.499 1 0.459 2.31 (1.28; 4.15)
DLAFH 34 12 46 23   7.926 0.005* 1 7.957 0.43 (0.24; 0.78)
Total 272   202   474       
NP 65 24 33 16        
BP 56 21 64 32   8.442 0.004* 1 1.746 0.44 (1.30; 3.90)
DP 146 55 106 52   1.746 0.186 1 1.767 3.25 (0.26; 0.77)
Total 267   203   470       
  1. *Significant values
  2. The values with (*) and in italics represent significant values