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Table 5 Known-group validation according to the performance status

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

ECOG performance status

P a

ES

Mean (SD)

0–1

2–4

(n = 220)

(n = 100)

Emotional

37.6 (24.7)

50.9 (23.3)

<0.001

13.22

0.53

Physical

25.9 (22.0)

48.6 (20.2)

<0.001

22.71

0.95

Financial

33.7 (31.8)

51.6 (30.5)

<0.001

17.87

0.55

Existential

11.6 (20.6)

23.4 (23.5)

<0.001

11.87

0.53

Functional

19.6 (20.4)

49.8 (24.7)

<0.001

30.27

1.16

Personal relationships

13.5 (20.8)

13.4 (20.8)

0.952

−0.14

−0.00

Total score

23.6 (16.3)

39.6 (15.6)

<0.001

17.67

0.90

  1. SD standard deviation, difference between the two groups, ES effect size
  2. a T test