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Table 1 Health-related quality of life measures: definitions and the consistency of multi-item measures

From: Self-reported health-related quality of life in persons with HIV infection: results from a multi-site interview project

Measures Definition Number of Items Cronbachs's Alphaa
Overall Health Perception of current health 1
Pain Perception of overall pain 1
Physical Functioning Extent to which health interferes with a variety of activities 6 0.84
Role Functioning Extent to which health interferes with usual daily activities 2 0.89
Social Functioning Extent to which health interferes with normal social activities 1
Mental Health General mood or affect, including depression, anxiety, well-being 5 0.85
Energy/Fatigue Extent to which patient felt fatigued 4 0.87
Cognitive Functioning Extent to which reasoning or concentration was impaired 4 0.88
  1. a measure of internal consistency reliability for multi-item scales