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Table 9 Differences in pre-operative and longer-term (6 months post-operative) patient-reported outcome measures

From: Patient and surgical prognostic factors for inpatient functional recovery following THA and TKA: a prospective cohort study

Patient-reported outcome measure Baseline score
Median (IQR)
Range, n
6 months post-op score
Median (IQR)
Range, n
Change scorea
Median (IQR)
Range, n
Change score exceeded MIC
At group levelb, n (%)
For individualsc, n (%)
OHS 22.0 (17.25, 29.0)
5–39, n = 60
46.0 (44.0, 48.0)
22–48, n = 61
22.5 (16.0, 28.75)
1–42, n = 60
60 (100%)
56 (93.3%)
OKS 25.0 (19.0, 32.0)
7–42, n = 117
43.0 (38.75, 46.0)
26-48, n = 118
16.0 (9.5, 23.0)
− 4.0–41.0, n = 117
117 (100%)
97 (82.9%)
EQ-5D VAS 80.0 (70.0, 90.0)
25–100, n = 178
85.0 (75.0, 90.0)
10–100, n = 179
1.0 (− 5.0, 12.5)
− 75–50, n = 178
N/A
  1. EQ-5D VAS EuroQol-5 Dimension Visual Analogue Scale, IQR inter-quartile range, MIC minimal important change, OHS Oxford Hip Score, OKS Oxford Knee Score
  2. aChange score is the difference between pre-operative baseline score and 6 months post-operative score
  3. bFor assessment at the group level, an MIC of 11 and 9 points was used for the OHS and OKS, respectively (Beard et al. [28])
  4. cFor assessment of individual patients, an MIC of 8 and 7 points was used for the OHS and OKS, respectively (Beard et al. [28])