Most of the outcome question naires had a mixed content reflecting various constructs such as pain and symptoms , sleep disturbances , psychological dysfunctions , physical impairments , and social functions .
STUDY DESIGN A systematic literature review of outcome question naires design ed for assessing functional status or disability in patients with low back pain .
OBJECTIVES To provide a comprehensive overview of all functioning/disability question naires used in recent years and to explore how the main concept(s ) was described or defined in the original paper , the content or the domains of disability , and the measurement properties of the question naires .
SUMMARY OF BACKGROUND DATA A number of clinical tools design ed for evaluating the functional status of patients with low back pain have been developed .
Only a few have been review ed earlier , and there has been little focus on the content reflected in the question naires .
The General Function Score: a useful tool for measurement of physical disability. Validity and reliability
Abstract The General Function Score ( GFS ) is a disease-specific instrument consisting of nine items focusing on strict physical activities of daily living . It is intended as an alternative to the more complex scores of disability ( such as the Oswestry Disability Index ) , serving as a complement to the quality of life instruments in the study of low back pain ( LBP ) . It was developed from an original 17-item question naire , of which 11 of the items were tested for criterion validity in an observer-supervised performance test . Two items were excluded from further analysis because of too low a validity . The remaining nine-item GFS was tested for construct validity , reliability , feasibility and responsiveness in six different cohorts : 297 patients with chronic low back pain ( cohort 1 ) , an age- and sex-matched control group of 287 r and omly allocated Swedish citizens ( cohort 2 ) , three separate groups of patients admitted for surgery due to low back disorders ( cohorts 3–5 ) and out patients with spinal disorders ( cohort 6 ) . Correlations were tested with the Spearman Rank correlation coefficient , differences between groups with the Mann-Whitney test and the internal consistency with the Cronbach 's coefficient α . The GFS total scores showed correlations of 0.78 , 0.81 and 0.88 in the three aspects of the performance test . The response rate was 98.3–100 % . The mean time to complete the question naire was 1.2 min . The internal consistency was 0.69 and 0.86 in cohorts 1 and 2 respectively . The test-retest correlation was 0.88 . The GFS showed a high responsiveness to difference and change . The effect size was 0.82–0.96 in surgically treated disc herniation and 0.55–0.85 in spondylolisthesis . The GFS is a highly valid and reliable instrument with good responsiveness and feasibility , useful for evaluation of physical disability
Most of the outcome question naires had a mixed content reflecting various constructs such as pain and symptoms , sleep disturbances , psychological dysfunctions , physical impairments , and social functions .
STUDY DESIGN A systematic literature review of outcome question naires design ed for assessing functional status or disability in patients with low back pain .
OBJECTIVES To provide a comprehensive overview of all functioning/disability question naires used in recent years and to explore how the main concept(s ) was described or defined in the original paper , the content or the domains of disability , and the measurement properties of the question naires .
SUMMARY OF BACKGROUND DATA A number of clinical tools design ed for evaluating the functional status of patients with low back pain have been developed .
Only a few have been review ed earlier , and there has been little focus on the content reflected in the question naires .