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Table 2 Cronbach’s alpha coefficient for the MMQL-Youth form and adolescent form

From: Psychometric evaluation of a Swedish version of Minneapolis-Manchester quality of life-youth form and adolescent form

Sub-scales of the scale Youth form Adolescent form
  Cronbach’s alpha coefficient Cronbach’s alpha coefficient
Physical functioning .66  
Psychological functioning .81  
Physical Symptoms .68  
Outlook on life/family dynamics .78  
Physical functioning   .69
Cognitive functioning   .86
Psychological functioning   .83
Body image   .78
Social functioning   .85
Outlook on life   .91
Intimate relations   .75
MMQL overall scale .88 .92