Cross-Cultural Adaptation and Clinimetric Testing of Functional Rating Index (FRI) Outcome Measure into the Arabic Language

Table 1

Psychometric properties of Arabic instruments used in this study.

Instruments	ODI	RMDQ	PSFS
Study	Algarni et al. [32]	Maki et al. [30]	Alnahdi et al. [33]
Internal consistency	0.886	0.729	0.75
Test-retest reliability
Construct validity	^a; ^b	^b	—

^aCorrelated with the Roland-Morris Disability Questionnaire. ^bCorrelated with the Visual Analogue Scale. Abbreviations: : Cronbach alpha: ICC: intraclass correlation coefficients; RMDQ: Roland-Morris Disability Questionnaire; ODI: Oswestry Disability Index; PSFS: Patient-Specific Functional Scale.