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Table 2 Comparison of WOMAC index score change (percentage) from baseline

From: Effectiveness of moxibustion treatment as adjunctive therapy in osteoarthritis of the knee: a randomized, double-blinded, placebo-controlled clinical trial

Endpoint Week Active group n = 55; (%) Sham group n = 55; (%) Z value P value
x ¯ ± SD Median (P25, P75) x ¯ ± SD Median (P25, P75)
Pain 3 24.65 ± 43.42 32.56 (9.74, 51.91) 2.63 ± 57.87 3.61 (-19.23, 44.44) -2.513 0.012a
  6 52.87 ± 31.57 60.50 (33.70, 77.70) 24.43 ± 50.03 29.38 (3.28, 59.21) -3.806 <0.001a
  12 57.90 ± 31.77 59.77 (38.46, 86.08) 18.37 ± 62.38 30.12 (-2.78, 65.15) -3.052 0.001a
  24 50.75 ± 35.03 61.31 (31.08, 74.73) 20.47 ± 57.30 39.86 (-5.71, 75.00) -3.111 0.002a
Function 3 21.71 ± 79.25 40.76 (9.89, 61.87) -7.23 ± 96.90 15.93 (-11.44, 34.81) -3.080 0.002a
  6 39.03 ± 71.26 54.37 (30.52, 73.65) 13.14 ± 111.49 34.50 (4.57, 65.97) -2.423 0.015a
  12 50.84 ± 43.67 60.61 (32.82, 78.83) 14.51 ± 89.63 32.68 (-5.5, 64.20) -3.543 <0.001a
  24 43.58 ± 53.51 58.32 (23.32, 74.11) 11.28 ± 114.82 39.86 (-5.71, 75.00) -1.898 0.058
  1. Western Ontario and McMaster Universities’ Osteoarthritis Index (WOMAC) score reduction change (post-treatment - baseline)/baseline × 100%. a P <0.05 for purpose of comparison. SD, standard deviation.