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Table 3 Median scores and interquartile ranges for the main study outcomes

From: Efficacy of a progressive walking program and glucosamine sulphate supplementation on osteoarthritic symptoms of the hip and knee: a feasibility trial

   Week
   0 6 12 18 24 6-24
Physical activity (min/week) 25 th 20.00 30.00 150.00 197.50 120.00 z 2.88
  Median 55.00 100.00a 225.00b 352.50c 190.00d P <0.001
  75 th 108.75 221.25 360.00 555.00 405.00 r 0.38
Physical function
Self-paced step test (seconds)
25 th 92.50 75.00 68.25 60.50 58.50 z -4.62
  Median 104.00 90.50a 79.50b 73.50c 70.00d P <0.001
  75 th 129.75 102.50 90.25 81.50 75.75 r 0.62
WOMAC measures         
   Arthritis pain 25 th 11.00 8.00 5.00 5.25 3.25 z -2.61
  Median 15.50 15.00 12.50b 12.00 9.00 P 0.01
  75 th 24.75 24.75 19.00 19.00 14.00 r 0.35
   Stiffness 25 th 7.25 3.50 3.25 4.00 3.25 z -1.87
  Median 10.00 7.00a 7.00 5.50 5.00 P 0.06
  75 th 14.00 12.00 11.00 10.75 9.50 r 0.25
   Physical function 25 th 44.25 26.50 13.00 12.00 15.75 z -3.11
  Median 63.50 58.00a 36.50b 33.00 35.00 P <0.001
  75 th 86.50 78.25 80.50 60.50 57.00 r 0.42
Pain after step test 25 th 9.25 6.25 1.50 1.88 0.25 z -3.11
  Median 15.00 11.50 7.50b 8.50 4.50 P <0.001
  75 th 24.75 22.00 16.00 15.00 13.25 r 0.42
Total index 25 th 61.50 36.50 29.00 23.13 23.50 z -2.95
  Median 89.50 77.50a 53.00b 48.00 51.50 P <0.001
  75 th 123.75 119.00 111.50 85.25 80.00 r 0.39
  1. Note. Z scores, P-values and effect sizes (r) for changes between Weeks 6 and 24 are shown in the right hand column.
  2. a Week 6 significantly different from Week 0.
  3. b Week 12 significantly different from Week 6.
  4. c Week 18 significantly different from Week 12.
  5. d Week 24 significantly different from Week 18.
  6. r = Effect size; WOMAC = Western Ontario and McMaster Universities Osteoarthritis Index.