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Table 4 Construct validity. Spearman’s correlations between the FreKAQ-I and KOOS, PI-NRS, PCS and HADS. Confidence intervals by bootstrap, 1000 repetitions

From: Cross-cultural adaptation, reliability and validity of the Fremantle Knee Awareness Questionnaire in Italian subjects with painful knee osteoarthritis

Measures versus FreKAQ-I

Spearman’s correlation

rho

95% Conf. Interval

KOOS pain

0.51*

0.35

0.66

KOOS symptoms

0.50*

0.34

0.65

KOOS ADLs

0.59*

0.44

0.73

KOOS QoL

0.38*

0.20

0.56

PI-NRS rest

0.35*

0.16

0.54

PI-NRS motion

0.37*

0.19

0.54

PCS

0.47*

0.32

0.63

HADS anxiety

0.36*

0.18

0.54

HADS depression

0.43*

0.28

0.58

  1. *p < .001
  2. FreKAQ-I Fremantle knee awareness questionnaire, Italian version, KOOS Knee injury and osteoarthritis outcome score, ADLs activities of daily living, QoL quality of life, PI-NRS pain intensity numerical rating scale, PCS pain catastrophising scale, HADS Hospital anxiety and depression score