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Table 8 Discriminant validity of WHOQOL-DIS for people with intellectual disabilities

From: The World Health Organization Quality of Life instrument for people with intellectual and physical disabilities (WHOQOL-Dis): evidence of validity of the Brazilian version

Factor/domain Age (years)   Disability (WHODAS-II)  
18-40 (n = 130) 41-57 (n = 26) df = 154 12-18 (n = 82) 19-51 (n = 74) df = 154
Mean (SD) Mean (SD) t d Mean (SD) Mean (SD) t d
Physical(a) 52,66 (9,13) 55,36 (7,37) −1,41* 0,113 56,49 (7,36) 49,37 (8,99) 5,37** 0,397
Psychological(a) 49,13 (8,39) 50,64 (8,31) −0,84 0,068 51,83 (6,81) 46,68 (9,12) 3,96** 0,304
Social(a) 40,19 (11,71) 38,46 (9,74) 0,71 0,057 44 (9,1) 35,36 (12,01) 5,02** 0,375
Environment(a) 38,15 (9,32) 40,14 (10,33) −0,98 0,079 41,73 (7) 34,88 (10,58) 4,71** 0,355
Overall(a) 80,96 (23,77) 78,37 (23,06) 0,51 0,041 86,89 (17,88) 73,48 (27,05) 3,61** 0,279
Factor 1(b) 76,86 (14,97) 75,32 (15,36) 0,48 0,039 79,88 (14,87) 72,97 (14,39) 2,94* 0,231
Factor 2(b) 31,99 (15,38) 31,41 (13,4) 0,18 0,015 34,65 (14,01) 28,83 (15,62) 2,46* 0,194
Factor 3(b) 39,62 (10,3) 39,74 (10,82) −0,06 0,005 42,99 (7,72) 35,92 (11,62) 4,42** 0,336
Overall(b) 15 (9,42) 16,59 (8,09) −0,8 0,064 17,45 (8,02) 12,84 (9,86) 3,19** 0,249
DISQOL Module 47,02 (8,78) 46,55 (10,05) 0,24 0,019 50,13 (8,06) 43,41 (8,64) 5,02** 0,375
Local Module 38,56 (10,36) 38,7 (11,04) −0,06 0,005 41,54 (8,53) 35,3 (11,4) 3,84** 0,296
  1. (a)WHOQOL-Bref. (b)DISQOL Module: factors congruent to the ones found in the cross-cultural project (global sample).
  2. Levels of significance: *p < 0.05; **p ≤ 0.001. df = degrees of freedom; d = effect size.