Adaptation and Validation of the Foot Function Index-Revised Short Form into Polish

Table 4

Convergent validity.

FFI-RS	VAS	HAQ	HAQ walking
FFI-RS total	0.54	0.61	0.51
FFI-RS pain	0.50	0.41	0.32
FFI-RS stiffness	0.52	0.50	0.43
FFI-RS difficulty	0.47	0.61	0.52
FFI-RS activity limitation	0.32	0.37	0.31
FFI-RS social issues	0.34	0.52	0.43

Significant correlation ( < 0.01; 2-tailed).