Risk Factors, Diagnostics, and Radiological Changes of the Sacroiliac Joint After Lumbar Fusion: A Prospective Cohort Study

Risk Factors, Diagnostics, and Radiological Changes of the Sacroiliac Joint After Lumbar Fusion: A Prospective Cohort Study - The SILF Study: A Prospective Risk Factor and Imaging Study of Sacroiliac Joint Morbidity after Lumbar Fusion

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00039301

Enrollment

420

Registered

2026-03-10

Start date

2026-03-10

Completion date

Unknown

Last updated

2026-03-30

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

Conditions

Postoperative sacroiliac joint (SIJ) pain following lumbar spinal fusion

Interventions

Group 1: Arm 1 includes all patients scheduled for lumbar fusion surgery who meet the inclusion and exclusion criteria. This is a prospective, non-interventional observational cohort, in which only as

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: • Planned degenerative lumbar fusion surgery • Ability to provide informed consent

Exclusion criteria

Exclusion criteria: • Contraindications to imaging • Previous sacroiliac joint (SIJ) fusion • Pre-existing fibromyalgia syndrome • Ankylosing spondylitis (Morbus Bechterew) • Known sacroiliitis • Known bone or skeletal metastases

Design outcomes

Primary

Measure	Time frame
• Incidence of sacroiliac joint (SIJ) pain within 3 and 12 months postoperatively, defined by: o positive clinical provocation tests, and o clinically relevant pain intensity (NRS > 5)	—

Secondary

Measure	Time frame
• Radiological sacroiliac joint (SIJ) changes (CT- and MRI-based degeneration) • Changes in sagittal and spinopelvic parameters • Muscle morphology (paraspinal and gluteal muscles) • Patient-reported outcome measures (PROMs): ODI, COMI Back, NRS pain • Diagnostic accuracy of clinical provocation tests • Development of a predictive risk score	—

Countries

Germany

Contacts

Public ContactGabriele Rotter

Charité Universitätsmedizin

gabriele.rotter@charite.de030 450 615144

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Apr 4, 2026