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

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

Patient-reported outcome measure	Baseline score Median (IQR) Range, n	6 months post-op score Median (IQR) Range, n	Change score^a Median (IQR) Range, n	Change score exceeded MIC At group level^b, n (%) For individuals^c, 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

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
^aChange score is the difference between pre-operative baseline score and 6 months post-operative score
^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])
^cFor assessment of individual patients, an MIC of 8 and 7 points was used for the OHS and OKS, respectively (Beard et al. [28])

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