The objective of the present study is to analyse the diagnostic validity of 8 neurodynamic and/or orthopedic tension tests using magnetic resonance imaging as the Gold Standard.
Lumbar radiculopathy is a nerve root disorder which affects quality of life of the patient and it is considered as an important health problem. Therefore, its correct diagnosis is essential. The objective of the present study is to analyse the diagnostic validity of 8 neurodynamic and/or orthopedic tension tests using magnetic resonance imaging as the Gold Standard. This is an epidemiological study of randomized consecutive cases which was observational, descriptive, transversal, double blinded and followed the STARD (Standards for Reporting Diagnostic accuracy studies) declaration.
Study Type
OBSERVATIONAL
Enrollment
1,887
The following neurodynamic and/or orthopedic tension tests were done: the Straight Leg Raise test (SLR), the Bragard test (B) and another test which was the combined test of both (SLR+B)
The following neurodynamic and/or orthopedic tension tests were done: the Fajersztajn test (F), the Sicard test (S) and another test which was the combination of both (F+S)
The following neurodynamic and/or orthopedic tension tests were done: the Passive Neck Flexion test (PNF), the Kernig test (K) and another test which was the combination of both (PNF+K)
Sensitivity of the tests
Is is an indicator of the internal validity of the test. The probability that a subject with lumbar or lumbosacral radiculopathy have a positive results in the diagnostic test. It is obtained with the statistical analysis
Time frame: Through study completion, an average of 2 years
Specificity of the tests
Is is an indicator of the internal validity of the test. Indicates the percentage of healthy subjects confirmed with a test with negative results. It is obtained with the statistical analysis
Time frame: Through study completion, an average of 2 years
Positive and negative predictive values (PV+ and PV-)
Is is an indicator of the internal validity of the test. The range of values are interpreted as: 0-10% null, 10-30% very low; 30-60% low; 60-70% low moderate; 70-80% high moderate; 80-90% high; 90-100% very high.
Time frame: Through study completion, an average of 2 years
Likelihood Ratio (LR+ y LR-).
Is is an indicator of the external validity of the test.The range of values and their impact on the clinical utility are: LR+: \> 10 great increase, excellent test; 5-10 moderate increase, good test; 2-5: small increase, bad test; \< 2: minor increase, useless test. LR-: 0.5-1 minor decrease, useless test; 0,5-0,2 small decrease, bad test; 0,1-0,2 moderate decrease, good test; \< 0,1 great decrease, execelent test
Time frame: Through study completion, an average of 2 years
Kappa index (K)
It is used to estimate the reliability or accuracy of the tests. The range of values are interpreted as follows: Poor, \< 0.20; weak, between 0.21 and 0.40; Moderate, between 0.41 and 0.60; Good, between 0.61 and 0.80; Very good, between 0.80 and 1
Time frame: Through study completion, an average of 2 years
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
The following neurodynamic and/or orthopedic tension tests were done: the Slump test (ST), the Dejerine triad (DT) and another test which was the combination of both (ST+DT)
All participants will undergo a MRI scan to compare results between the index tests and the Gold Standard