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Table 1 Demographic and outcome data

From: Improved outcomes in patients with positive metal sensitivity following revision total knee arthroplasty

  All patients Reactive Non-reactive Significance (p)
Pre-revision variables (n = 46) (n = 39) (n = 7)
 Age (years; mean ± SD) 61.47 ± 9.34 61.36 ± 9.98 62.19 ± 2.84 0.704
 Female 59% 67% 43% 0.438
 Pain duration (months) 8.59 ± 11.73 8.12 ± 11.57 13.67 ± 14.84 0.587
 Pain 6 months prior (1–10) 6.59 ± 2.66 6.82 ± 2.55 4.75 ± 3.3 0.303
 Pain at revision (1–10) 6.93 ± 2.19 7.15 ± 2.06 5.71 ± 2.63 0.209
 Range of motion (degrees) 94.02 ± 26.58 94.74 ± 27.98 90 ± 17.83 0.569
Post-revision #1 variables (6 weeks) (n = 39) (n = 34) (n = 5)
 Duration (weeks) 6.82 ± 2.53 6.95 ± 2.66 5.94 ± 1.08 0.153
 Pain exp 2.97 ± 1.68 2.94 ± 1.7 3.25 ± 1.71 0.748
 Pain 4.46 ± 2.79 4.45 ± 2.69 4.5 ± 3.52 0.972
 Range of motion (degrees) 101.89 ± 22.08 100.95 ± 23.29 107 ± 13.87 0.366
Post-revision #2 variables (5 months) (n = 31) (n = 29) (n = 2)
 Duration (weeks) 21.25 ± 17.19 21.68 ± 17.71 15 ± 1.21
 Pain exp 3.42 ± 1.61 3.52 ± 1.56 1 ± 0
 Pain 4.19 ± 2.35 4.45 ± 2.2 0.5 ± 0.71
 Range of motion (degrees) 105.79 ± 20.63 105.35 ± 21.22 112.5 ± 3.54
Post-revision #3 variables (1 year) (n = 20) (n = 18) (n = 2)
 Duration (weeks) 60.89 ± 24.87 59.53 ± 25.7 73.07 ± 13.84
 Pain exp 3.2 ± 1.86 3.36 ± 1.82 1 ± 0
 Pain 3.63 ± 2.84 3.91 ± 2.84 1.25 ± 1.77
 Range of motion (degrees) 112.09 ± 15.62 112.19 ± 16.01 111 ± 15.56
  1. Demographics of patients (n = 46) who underwent LTT testing prior to hip arthroplasty. Scores from pre- and post-revision assessments of pain and function are reported. Differences between reactive patients and non-reactive patients were compared using unpaired two-tailed t tests or Pearson’s chi-squared test where appropriate