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Table 2 Studies that provide Oxford Knee change scores at 12 months for patients undergoing knee replacement

From: What is the optimal time point to assess patient-reported recovery after hip and knee replacement? a systematic review and analysis of routinely reported outcome data from the English patient-reported outcome measures programme

Study reference Location Description of surgery Study design Number of patients Baseline OKS 12-month OKS OKS change
Kamat (2008) [13] England TKA: computer assisted Prospective cohort 263 19.6 35.6 16.0
Kamat (2008) [13] England TKA: standard instrumentation Prospective cohort 302 20.1 34.2 14.1
Unitt (2008) [14] England TKR Prospective cohort 394 17.3 36.1 18.8
KAT Group (2009) [15] UK TKA RCT 2352 18.0 34.2 16.2
O’Brien (2009) [10] Northern Ireland TKA Prospective cohort 253 12.9 33.9 21.0
Smith (2010) [16] Scotland TKA: computer navigated by novice Prospective Cohort 50 18.0 37.0 19.0
Smith (2010) [16] Scotland TKA: computer navigated by expert Prospective Cohort 50 17.0 40.0 23.0
Hanusch (2010) [17] England TKA: fixed-bearing RCT 55 19.6 38.6 19.0
Hanusch (2010) [17] England TKA: rotating-platform RCT 50 19.8 39.0 19.2
Reddy (2010) [18] England TKA Prospective cohort 379 18.9 39.0 20.1
Hossein (2011) [19] England TKA: Press Fit Condylar prosthesis RCT 40 18.3 30.5 12.2
Hossein (2011) [19] England TKA: Medial Rotation prosthesis RCT 40 18.4 34.1 15.7
Naylor (2011) [20] Australia TKR Prospective cohort 141 21.1 39.3 18.2