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Table 3 Mean and Quartile Scores of the Performance Measures across Time

From: Assessing stability and change of four performance measures: a longitudinal study evaluating outcome following total hip and knee arthroplasty

Measure Preop
Mean, SD
Quartiles
n = 150
Postop 1
<16 Days Postop
Mean, SD, n
Quartiles
Postop 2
>20 Days From Postop 1
Mean, SD, n
Quartiles
Self-paced Walk Time (seconds) 31.7, 9.2
25, 30, 36
85.7, 62.7, 115
53, 66, 93
33.7, 10.9, 92
26, 32, 38
Stair Time (seconds) 17.1, 8.2
11, 15, 22
40, 12, 87
29, 39, 48
20.0, 9.7, 91
12, 18, 27
Timed Up and Go Time (seconds) 9.8, 3.2
7, 9, 11
24.7, 14.2, 116
15, 21, 31
10.3, 4.2, 91
7, 9, 12
Six minute Walk Test Distance (meters) 412, 123
329, 412, 508
193, 87, 82
120, 194, 263
408, 116, 91
328, 393, 477
  1. SD, Standard Deviation
  2. n, Number of subjects