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Table 3 Mean values, internal consistency and test–retest analysis of IQualiV–OG-21

From: Development of a new multimedia instrument to measure cancer-specific quality of life in Portuguese-speaking patients with varying literacy skills

IQualiV-OG-21 domains Number of items Mean (SD) Cronbach’s α (95 % CI) ICC (95 % CI)a
Emotional 6 41.7 (24.9) 0.85 (0.82–0.87) 0.88 (0.80–0.93)
Physical 5 33.0 (23.8) 0.79 (0.75–0.82) 0.79 (0.66–0.88)
Financial 2 39.6 (32.4) 0.81 (0.77–0.85) 0.83 (0.72–0.90)
Existential 3 15.2 (22.2) 0.81 (0.77–0.84) 0.96 (0.94–0.98)
Functional 3 28.9 (25.9) 0.77 (0.72–0.81) 0.86 (0.77–0.92)
Personal relationships 2 13.4 (20.7) 0.75 (0.69–0.80) 0.94 (0.90–0.97)
Total score 21 28.7 (17.7) 0.90 (0.89–0.92) 0.95 (0.92–0.97)
  1. SD standard deviation, ICC intraclass correlation coefficient
  2. an = 64