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• W2000659790 abstract "In Brief Study Design. Repeated measures study design. Objective. Determine a meaningful change in low back functional impairment as measured with the lumbar motion monitor. Summary of Background Data. A quantitative functional performance probability (P(n)) measure has been developed and is scored from 0.00 to 1.00. Previous research has shown that a 0.5 cut-off provides excellent sensitivity and specificity for identifying impaired and healthy low back function. However, a meaningful change in the P(n) measure has not been defined. Methods. The lumbar motion monitor was used to repeatedly measure P(n) in 3 groups of subjects including (1) asymptomatic, (2) recovering low back pain (LBP) and, (3) nonrecovering LBP. The asymptomatic group had 20 subjects. The recovering and nonrecovering LBP had 18 and 8 subjects, respectively. The asymptomatic group was tested 5 times at 1-week intervals. The 2 LBP groups were tested every 2 weeks for 3 months (6 evaluations). Results. The P(n) in the asymptomatic group did not significantly change over the observed period. On the basis of the variability in the asymptomatic group it was hypothesized that a meaningful change in P(n) was 0.14. The defined meaningful change was evaluated in 2 patient with LBP populations. The P(n) in the recovered LBP group significantly improved during the 3 month observation period and there was a corresponding reduction of symptoms. In the recovering LBP group the within subject standard deviation was 0.14 and all patients had at least 1 visit to visit change greater than 0.14. Furthermore, 11 of the 18 recovering patients with LBP had a meaningful change between the first 2 visits. In contrast, none of the nonrecovering LBP group had a meaningful change between the first 2 visits. Conclusion. A meaningful change in P(n) was defined as 0.14. A probability of normal (P(n)) low back functional performance has been developed. Based on the variability in an asymptomatic group a meaningful change in P(n) has been defined as 0.14. In group of recovering patients with low back pain, all had at least 1 visit to visit change greater than 0.14." @default.
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• W2000659790 date "2009-09-01" @default.
• W2000659790 modified "2023-10-16" @default.
• W2000659790 title "Quantification of a Meaningful Change in Low Back Functional Impairment" @default.
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• W2000659790 doi "https://doi.org/10.1097/brs.0b013e3181b34764" @default.
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