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How much we can rely on the specific instability clinical tests to classify low back pain subjects into different instability categories

The Inter-Rater Reliability of Clinical Tests That Best Predict the Sub-classification of Lumbar Segmental Instability: Structural, Functional, and Combined Instability: a cross sectional study

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
ISRCTN
Registry ID
ISRCTN18037677
Enrollment
40
Registered
2015-01-20
Start date
2013-02-04
Completion date
Unknown
Last updated
2023-02-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Subjects with recurrent or chronic low-back pain (LBP) Musculoskeletal Diseases Chronic low-back pain (LBP)

Interventions

There was no intervention at all. Study conducted in the Physical Therapy Research Laboratory at Loma Linda University (USA). Two examiners performed the six most validated clinical lu

Sponsors

Loma Linda University
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Patients who have a new episode of LBP 2. Experienced a similar episode of LBP before, with the first episode of back pain occurring at least three months before the date of recruitment 3. Experienced persistent LBP for at least three months

Exclusion criteria

Exclusion criteria: 1. Patients who have undergone previous spinal-fusion surgery 2. History of traumatic fracture of the spine that resulted in a permanent neurological deficit 3. Scoliosis greater than 20° 4. Pregnancy 5. Inability to actively flex and extend the spine adequately to permit an assessment of segmental motion due to pain or muscle spasm 6. Medical “red flags” such as caudaequina syndrome, tumor, and systemic inflammatory conditions

Design outcomes

Primary

MeasureTime frame
Kappa coefficient values for inter-rater reliability between the two examiners The prevalence-adjusted, bias-adjusted Kappa (PABAK) values

Secondary

MeasureTime frame
The Baseline Measures (patients’ characteristics) were collected at the beginning of the study, which included: • the Numeric Pain Rating Scale (NPRS) • the Modified Oswestry Low-back Pain Disability Questionnaire (OSW) • and the Fear Avoidance Beliefs Questionnaire (FABQ)

Countries

United States of America

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026