Our findings show strong positive evidence for structural validity and internal consistency in patients with SP and LBP .
The current evidence shows that the FRI is comparable with both the Oswestry Disability Index and the Neck Disability Index in responsiveness .
To assess the measurement properties of the Functional Rating Index ( FRI ) and determine whether its measurement properties are comparable with other region-specific question naires .
In addition to low back pain ( LBP ) and neck pain ( NP ) , multiregion spinal pain ( SP ) is a common problem with a considerable prevalence in the general population .
The FRI was built to assess physical functioning in patients with SP .
However , a systematic review assessing evidence of its measurement properties in separated population s and a comparison with other question naires regarding each measurement property is lacking .
The validity and reliability of the functional rating index for evaluating low back pain in athletes.
The purpose of the present study was to determine the reliability and validity of the Functional Rating Index ( FRI ) for athletes with low back pain ( LBP ) . In this cross-sectional and prospect i ve cohort study , the vali date d Persian FRI ( PFRI ) was tested in 100 athletes with LBP and 50 healthy athletes . From the athletes with LBP , data were recollected among 50 athletes with a 7-day interval to examine test-retest reliability . The content validity was excellent , and the athletes with LBP responded to all items with no floor or ceiling effects . The discriminative validity was supported by a statistically significant difference in PFRI total scores between the athletes with LBP and healthy athletes . The concurrent criterion validity was good ( rho = 0.72 ) . The construct , convergent validity was good ( r = 0.83 ) . The internal consistency reliability estimate was high ( Cronbach 's α = 0.90 ) . Factor analysis demonstrated a single-factor structure with an explained variance of 52.22 % . The test-retest reliability was excellent , indicated by an ICC(agreement ) of 0.97 , and the agreement observed in the Bl and and Altman plot demonstrated no systematic bias . It is concluded that the PFRI has excellent psychometric properties for assessing athletes with LBP
Our findings show strong positive evidence for structural validity and internal consistency in patients with SP and LBP .
The current evidence shows that the FRI is comparable with both the Oswestry Disability Index and the Neck Disability Index in responsiveness .
To assess the measurement properties of the Functional Rating Index ( FRI ) and determine whether its measurement properties are comparable with other region-specific question naires .
In addition to low back pain ( LBP ) and neck pain ( NP ) , multiregion spinal pain ( SP ) is a common problem with a considerable prevalence in the general population .
The FRI was built to assess physical functioning in patients with SP .
However , a systematic review assessing evidence of its measurement properties in separated population s and a comparison with other question naires regarding each measurement property is lacking .