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Table 4 Worst and best responses to selected capability and performance items by using the identical response set a

From: Better assessment of physical function: item improvement is neglected but essential

  Capability:
(Present tense --
"Are you able to ...)
Performance:
(Past tense --
"Did you ...)
  Number Unable
to do
[Worst]
(%)
Without any difficulty
[Best]
(%)
Number Unable
to do
[Worst]
(%)
Without any difficulty
[Best]
(%)
Get in and out of bed 75 0 84 75 0 87
Walk outdoors on flat ground 78 8 65 81 4 60
Walk a block 78 9 56 81 10 59
Use a hammer to pound a nail 81 7 72 78 8 50b
Climb several flights of stairs 78 18 35 81 19 37
Run or jog 2 miles 81 78 5 78 71 8
Mean percentage, all items   20.0 52.8   18.7 50.2
Ratio of worst/best function response    38%    37%
  1. aWithout any difficulty; With a little difficulty; With some difficulty; With much difficulty; Unable to do
  2. bP < 0.01 difference between capability and performance item.