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Table 3 Construct validity of Malocclusion Impact Questionnaire total score based on known groups

From: Cross-cultural adaptation and validation in spanish of the malocclusion impact questionnaire (MIQ)

Variables n Median [IQR] Mean
[SD]
p
Overall, how much do your teeth bother you?
 Not at all or A little 164 6 [6] 7.0 [5.0] < 0.01
 Somewhat 40 9 [5.5] 10.3 [5.6]  
 Quite a bit or Very much 15 20 [15] 16.9 [8.8]  
Overall, how much do your teeth affect your life?
 Not at all or A little 151 6 [7] 6.9 [5.2] < 0.01
 Somewhat 37 9 [6] 10.1 [4.3]  
 Quite a bit or Very much 31 12 [18] 12.8 [8.4]  
Malocclusion
 Moderate 56 6 [6.5] 6.7 [5.1] 0.03
 Definitive-Severe 91 7 [8] 8.5 [6.0]  
 Very severe 72 8 [8] 9.4 [6.5]  
  1. IQR Interquartile range, SD standard deviation