Table 7.

Comparison of the correlation levels of various versions of FFI

Study	Cronbach’s α	ICC
French	0.85–0.97	0.77–0.97
Taiwanese	0.94	0.82
German	0.98	0.97-0.99
Spanish	0.69–0.96
Italian (17-IFFI)	0.95	0.90-0.92
Italian	0.98	0.86-0.98
Italian (18-IFFI)	0.95	0.91-0.94
Chinese	0.996-0.998	0.985-0.996
Korean	0.91-0.95	0.812-0.814
Korean	0.943	0.814
Turkish	0.821-0.938	0.960-0.985
Brazilian-Portuguese	0.61–0.80	0.97–0.99
Danish	0.97	0.95