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Table 5 The known groups' comparison (controlled for confounders)

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

  Healthy individuals (n = 906) Ill individuals (n = 258) P value
  Mean* (SD) Mean* (SD)  
Physical health 14.7 (2.3) 12.9 (2.7) < 0.001
Psychological health 13.7 (2.5) 12.5 (2.6) < 0.001
Social relationships 14.1 (2.4) 13.4 (2.9) 0.001
Environmental health 12.7 (2.4) 11.5 (2.4) < 0.001
  1. * Adjusted mean. The higher score represents a better condition (scores range from 4 to 20).