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Table 6 Knee – the SRM, SES, and RI (with 95% CIs) for the OKS and the EQ-5D-3L (by the transition)

From: Assessing responsiveness of the EQ-5D-3L, the Oxford Hip Score, and the Oxford Knee Score in the NHS patient-reported outcome measures

  Total Much better A little better About the same A little worse Much worse
OKS [0, 48] Change N 191,379 138,407 31,650 8985 7029 4610
(Post-op. mean) 34.9 38.8 28.0 22.7 20.2 13.7
(Pre-op. mean) 19.1 19.6 18.1 17.7 18.3 16.7
Mean (SD) 15.8 (9.8) 19.2 (8.0) 9.9 (7.1) 5 (6.8) 1.9 (6.7) − 3.0 (7.0)
Meanchange score/SDchange score 1.6 (1.6, 1.6) 2.4 (2.4, 2.4) 1.4 (1.4, 1.4) 0.7 (0.7, 0.8) 0.3 (0.3, 0.3) − 0.4 (− 0.5, − 0.4)
SRM [Eq. 1] 1.4 (1.4, 1.4) 2.1 (2.1, 2.1) 1.5 (1.5, 1.5) 0.8 (0.8, 0.9) 0.3 (0.3, 0.4) − 0.5 (− 0.5, − 0.4)
SES [Eq. 2] 2.5 (2.5, 2.5) 2.7 (2.7, 2.7) 1.7 (1.7, 1.7) 1.2 (1.2, 1.2) 1.0 (1.0, 1.0) 0.9 (0.8, 0.9)
RI [Eq. 3] 0.7 (0.7, 0.7)      
EQ-5D-3L [− 0.59, 1] Change N 180,546 130,838 29,888 8434 6569 4243
(Post-op. mean) 0.7 0.8 0.6 0.5 0.4 0.2
(Pre-op. mean) 0.4 0.4 0.4 0.4 0.4 0.3
Mean (SD) 0.3 (0.3) 0.4 (0.3) 0.2 (0.3) 0.1 (0.3) 0.1 (0.3) − 0.1 (0.4)
Meanchange score/SDchange score 1.0 (0.9, 1.0) 1.2 (1.2, 1.2) 0.8 (0.8, 0.8) 0.4 (0.4, 0.5) 0.2 (0.1, 0.2) − 0.4 (− 0.4, − 0.4)
SRM [Eq. 1] 0.8 (0.8, 0.9) 1.0 (1.0, 1.1) 0.8 (0.7, 0.8) 0.5 (0.4, 0.5) 0.2 (0.1, 0.2) − 0.4 (− 0.4, − 0.4)
SES [Eq. 2] 1.3 (1.3, 1.3) 1.4 (1.4, 1.4) 1.2 (1.2, 1.2) 1.3 (1.3, 1.3) 1.2 (1.2, 1.2) 1.2 (1.2, 1.3)
RI [Eq. 3] 0.3 (0.3, 0.3)