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Table 3 Hypothesis testing for evaluating validity 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

Total

ACL

Meniscus

Cartilage

Mix

Lysholm

0.80 (≥ 0.6)

0.75 (≥ 0.6)

0.79 (≥ 0.6)

0.81 (≥ 0.6)

0.8 (≥ 0.6)

Tegner

0.34 (0.1–0.49)

0.39 (0.1–0.49)

0.37 (0.1–0.49)

0.42 (0.1–0.49)

0.25 (0.1–0.49)

PCS-12

0.70 (≥ 0.6)

0.71 (≥ 0.6)

0.67(≥ 0.6)

0.68 (≥ 0.6)

0.72 (≥ 0.6)

MCS-12

0.17 (0.1–0.29)

0.13 (0.1–0.29)

0.23 (0.1–0.29)

0.30 (0.1–0.29)

0.09 (0.1–0.29)

  1. Correlation estimates in parentheses indicate a priori formulated hypotheses
  2. Correlation estimates in bold indicate confirmed hypotheses
  3. IKDC-SKF = International Knee Documentation Committee Subjective Knee Form, Lysholm = Lysholm Score, Tegner = Tegner Activity Scale, PCS-12 = 12-item short-form health survey (SF-12) physical component summary scale, MCS-12 = 12-item short-form health survey (SF-12) mental component summary scale, 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)