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Table 4 Responsiveness of the IKDC-SKF for the total population as well as each patient subgroup

From: Measurement properties of the German version of the IKDC subjective knee form (IKDC-SKF)

  IKDC-SKF
Δ total Δ ACL Δ Meniscus Δ Cartilage Δ Mix
Δ Lysholm 0.74 (≥ 0.4) 0.69 (≥ 0.4) 0.79 (≥ 0.4) 0.75 (≥ 0.4) 0.72 (≥ 0.4)
Δ PCS-12 0.60 (≥ 0.4) 0.57 (≥ 0.4) 0.54 (≥ 0.4) 0.68 (≥ 0.4) 0.59 (≥ 0.4)
GTO −0.55 (≤ − 0.6) −0.45 (≤ − 0.6) −0.56 (≤ − 0.6) −0.66 (≤ − 0.6) −0.51 (≤ − 0.6)
ES 1.04 (≥ 0.8) 1.11 (≥ 0.8) 1.39 (≥ 0.8) 0.75 (≥ 0.8) 1.06 (≥ 0.8)
SRM 0.96 (≥ 0.8) 0.84 (≥ 0.8) 1.23 (≥ 0.8) 0.71 (≥ 0.8) 0.99 (≥ 0.8)
  1. Correlation estimates in parentheses indicate a priori formulated hypotheses
  2. Correlation estimates in bold indicate confirmed hypotheses
  3. Δ = change score
  4. IKDC-SKF = International Knee Documentation Committee Subjective Knee Form, PCS-12 = 12-item short-form health survey (SF-12) physical component summary scale, GTO = global treatment outcome, ES = effect size, SRM = standardised response mean, Total = all eligible study patients, ACL = anterior cruciate ligament surgery patients only, Meniscus = meniscal surgery patients only, Cartilage = articular cartilage surgery only, Mix = patients from a combination of the three surgery types (mixed surgery subgroup)