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Table 3 Descriptive and reliability statistics for the WHOQOL-BREF

From: Psychometric properties of the Iranian interview-administered version of the World Health Organization's Quality of Life Questionnaire (WHOQOL-BREF): A population-based study

  Descriptive statistics Alpha coefficients
Domains Number of items All (n = 1164) Mean score (SD)* Healthy individuals (n = 906) Ill individuals (n = 258)
Physical health 7 14.3 (2.6) 0.70 0.74
Psychological health 6 13.4 (2.6) 0.73 0.70
Social relationships 3 13.9 (2.6) 0.55 0.61
Environmental health 8 12.3 (2.4) 0.84 0.72
  1. * The higher score represents a better condition (scores range from 4 to 20).