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Table 4 Internal consistency reliability for Pediatric Quality of Life Inventory™ 4.0 Generic Core Scales child self-report and parent proxy-report

From: Measuring health-related quality of life in Hungarian children with heart disease: psychometric properties of the Hungarian version of the Pediatric Quality of Life Inventory™ 4.0 Generic Core Scales and the Cardiac Module

Scale Total sample Toddler (2-4) Young child (5-7) Child (8-12) Adolescent (13-18)
  Patient group Comparison group Patient group Comparison group Patient group Comparison group Patient group Comparison group Patient group Comparison group
  Cronbach's α
Child Self-report           
   Total scale score 0.90 0.87    0.83 0.78 0.92 0.91 0.90 0.88
   Physical functioning 0.82 0.75    0.67 0.62 0.89 0.80 0.79 0.80
   Psychosocial functioning 0.86 0.82    0.80 0.72 0.87 0.89 0.87 0.84
   Emotional functioning 0.69 0.71    0.55 0.61 0.71 0.77 0.77 0.73
   Social functioning 0.75 0.72    0.60 0.48 0.75 0.79 0.78 0.83
   School functioning 0.68 0.68    0.59 0.51 0.66 0.78 0.74 0.74
Parent Proxy-report           
   Total scale score 0.91 0.89 0.90 0.91 0.90 0.89 0.92 0.88 0.90 0.88
   Physical functioning 0.84 0.82 0.86 0.87 0.76 0.78 0.87 0.80 0.82 0.82
   Psychosocial functioning 0.88 0.84 0.83 0.84 0.87 0.84 0.88 0.85 0.88 0.84
   Emotional functioning 0.77 0.73 0.73 0.75 0.74 0.7 0.80 0.74 0.81 0.74
   Social functioning 0.83 0.76 0.80 0.78 0.88 0.78 0.79 0.70 0.85 0.80
   School functioning 0.75 0.71 0.59 0.43 0.74 0.70 0.79 0.74 0.70 0.75