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Table 2 Internal consistency of EORTC QLQ-C30 (1A) and QLQ-BN20 (1B)

From: Translation and validation of the Urdu version of the European organization for research and treatment of cancer core quality of life questionnaire (EORTC QLQ-C30) and brain module (QLQ-BN20) in primary brain tumor patients

1A: QLQ-C30
  Cronbach's alpha (p value)
Overall 0.86 (< 0.001*)
Global
Global status 0.80 (< 0.001*)
Functional
Physical functioning 0.83 (< 0.001*)
Role functioning 0.82 (< 0.001*)
Emotional functioning 0.75 (< 0.001*)
Cognitive functioning 0.63 (< 0.001*)
Social functioning 0.79 (< 0.001*)
Symptoms
Fatigue 0.36 (< 0.001*)
Nausea and vomiting 0.40 (< 0.001*)
Pain 0.46 (< 0.001*)
1B: QLQ-BN20
Overall 0.88 (< 0.001)*
Future uncertainty 0.801 (< 0.001*)
Symptoms
Visual disorder 0.790 (< 0.001*)
Motor dysfunction 0.703 (< 0.001*)
Communication deficit 0.868 (< 0.001*)
  1. *Significant at p-value < 0.05 by reliability analysis