Table 2.

Validity of the AOS-Fr

Comparison	ICC
Test–retest validity*
AOS-Fr v. AOS-Fr 1-wk	0.922 (95% CI 0.800–0.970)
AOS-Fr v. AOS-Fr 1-wk, pain subscale	0.895 (95% CI 0.729–0.960)
AOS-Fr v. AOS-Fr 1-wk, disability subscale	0.915 (95% CI 0.779–0.967)
Criterion validity†
AOS-Fr v. WOMAC	0.709§
AOS-Fr/PAIN vs WOMAC	0.677§
AOS-Fr, disability subscale v. WOMAC	0.698§
AOS-Fr v. SF-36	−0.654§
AOS-Fr, pain subscale v. SF-36	−0.620§
AOS-Fr, disability subscale v. SF-36	−0.618§
Construct validity‡
AOS-Fr v. single heel-lift ratio	−0.664§
AOS-Fr, pain subscale v. single heel-lift ratio	−0.542§
AOS-Fr, disability subscale v. single heel-lift ratio	−0.628§

AOS-Fr = Ankle Osteoarthritis Scale, French version; CI = confidence interval; ICC = intraclass correlation coefficient; WOMAC = Western Ontario and McMaster Universities Arthritis Index.

^*Calculated using ICC.

^†Measured using the Pearson correlation coefficient comparing the WOMAC and SF-36 to the AOS-Fr at the same visit.

^‡Calculated using the Pearson correlation coefficient between the AOS-Fr and the single heel-lift ratio at the same visit.

^§Significant at p < 0.01, 2-tailed.