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Table 2 Known Groups Validity of Lawton IADL Scale According to relevant categories

From: Validation of the Spanish version of the Lawton IADL Scale for its application in elderly people

  Hip + Wrist Hip Wrist
  (n=1965) (n=934) (n=1031)
  n Mean (SD) n Mean (SD) n Mean (SD)
Total 1903 5.56 (2.84) 903 4.32 (2.95) 1000 6.68 (2.22)
Age       
≤75a 582 7.18 (1.82)b,c 118 6.25 (2.60)b,c 464 7.42 (1.48)b,c
76-85b 823 5.58 (2.77)a,c 395 4.64 (2.90)a,c 428 6.45 (2.34)a,c
>85c 498 3.63 (2.75)a,b 390 3.41 (2.75)a,b 108 4.43 (2.62)a,b
p-value   <0.0001   <0.0001   <0.0001
Barthel Index       
≤35a 65 0.42 (0.56)c 52 0.35 (0.48)c 13 0.69 (0.75)b,c
40-55b 99 1.36 (1.61)c 80 1.08 (1.21)c 19 2.58 (2.39)a,c
≥60c 1714 6.00 (2.54)a,b 758 4.94 (2.72)a,b 956 6.84 (2.03)a,b
p-value   <0.0001   <0.0001   <0.0001
SF-12 PCS scale       
<50 1229 4.71 (2.91) 714 3.86 (2.84) 515 5.89 (2.57)
≥50 601 7.43 (1.41) 149 6.83 (2.01) 452 7.63 (1.09)
p-value   <0.0001   <0.0001   <0.0001
WOMAC-SF Function Subscale       
[0–25]a - - 351 6.44 (2.16)b,c - -
(25–50]b - - 261 3.99 (2.59)a,c - -
(50–100]c - - 300 2.18 (2.30)a,b - -
p-value   -   <0.0001   -
QuickDASH       
[0–25]a - - - - 855 7.09 (1.79)b,c
(25–50]b - - - - 98 4.71 (2.77)a,c
(50–100]c - - - - 41 2.88 (2.58)a,b
p-value   -   -   <0.0001
  1. a,b,c Superscript letters indicate differences among the respective categories of a variable by Scheffe test for multiple comparison.
  2. PCS: WOMAC physical component summary.