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Table 3 Construct validity, given as Spearman correlations of the five KOOS subscales and the eight SF-36 subscales in subjects following anterior cruciate ligament reconstruction (ACLR) (n = 72)

From: Cross-cultural translation and measurement properties of the Polish version of the Knee injury and Osteoarthritis Outcome Score (KOOS) following anterior cruciate ligament reconstruction

   KOOS subscales
   Pain Symptoms ADL Sport/Rec QOL
SF-36 subscales PF 0.68 0.45 0.65* 0.67* 0.64
RP 0.56 0.29 0.47 0.50 0.43
  BP 0.66* 0.41 0.54 0.51 0.51
  GH 0.38 0.18 0.38 0.33 0.39
  VT 0.38 0.21 0.35 0.32 0.36
  SF 0.38 0.23 0.38 0.33 0.25
  RE 0.22 0.12 0.20 0.25 0.17
  MH 0.17 0.08 0.12 0.10 0.14
  1. Abbreviations: ADL Activities of daily living, QOL Quality of life, PF Physical functioning, RP Role-physical, BP Bodily pain, GH General health, VT Vitality, SF Social functioning, RE Role-emotional, MH Mental health.
  2. * As hypothesized, expected correlations were above 0.35 for a priori hypotheses 1-3.
  3. As hypothesized, correlations between KOOS subscales and SF-36 subscales better representing Mental Health (bolded in table) were lower than between KOOS subscales and SF-36 subscales better representing Physical Health (a priori hypothesis 4).