To analyze the incidence and risk factors of preoperative cervical instability in patients with rheumatoid arthritis undergoing hip or knee arthroplasty

Status

Recruiting

Phases

Early Phase 1

Study type

Observational

Source

ChiCTR

Registry ID

ChiCTR2300071655

Enrollment

Unknown

Registered

2023-05-22

Start date

2023-05-22

Completion date

Unknown

Last updated

2023-06-12

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

Conditions

Rheumatoid arthritis of the knee/rheumatoid arthritis of the hip

Interventions

Rheumatoid arthritis Genu varum cervical spine stable group:None

Rheumatoid arthritis genu varum with cervical instability group:None

Rheumatoid arthritis Knee valgus cervical spine instability group:None

Rheumatoid arthritis Knee valgus cervical spine stability group:None

Rheumatoid arthritis, coxa vara, Cervical spine stability group:None

Rheumatoid arthritis, coxa vara, cervical instability group:None

Rheumatoid arthritis, coxa valgus, stable cervical spine:None

Rheumatoid arthritis, coxa valgus, cervical instability group:None

Rheumatoid arthritis, hip and knee stiffness, cervical spine instability group:None

Rheumatoid arthritis, hip and knee stiffness, cervical spine stability group:None

Eligibility

Sex/Gender

All

Age

30 Years to 90 Years

Inclusion criteria

Inclusion criteria: ? Patients who met the 1987 American College of Rheumatology diagnostic criteria for RA and met the indications for total knee arthroplasty or total hip arthroplasty; ? patients who had completed preoperative cervical spine anteroposterior, flexion and extension functional X-ray film, knee joint anteroposterior and lateral X-ray, pelvic anteroposterior X-ray film; ? patients with complete preoperative data; ? no cervical disc herniation, history of cervical spine surgery, cervical infection, cervical tumor and congenital cervical deformity.

Exclusion criteria

Exclusion criteria: ? Patients with cervical disc herniation, history of cervical spine surgery, cervical infection, cervical tumor and congenital cervical deformity; ? patients with incomplete preoperative data; ? Patients with contraindications to hip or knee replacement.

Design outcomes

Primary

Measure	Time frame
Anterior atlantoaxial space;Posterior atlantoaxial space;Distance between odontoid and McGregor line;Displacement distance between adjacent vertebral bodies of the lower cervical spine;Angle between adjacent vertebral bodies of the lower cervical spine;Angle of cobb;Femorotibial Angle;Hip-knee-ankle Angle;Lateral Angle of the distal femur;Medial Angle of proximal tibia;Lower limb mechanical axis offset distance;Neck shaft Angle;Distance of acetabular retraction;	—

Measure

Time frame

Anterior atlantoaxial space;Posterior atlantoaxial space;Distance between odontoid and McGregor line;Displacement distance between adjacent vertebral bodies of the lower cervical spine;Angle between adjacent vertebral bodies of the lower cervical spine;Angle of cobb;Femorotibial Angle;Hip-knee-ankle Angle;Lateral Angle of the distal femur;Medial Angle of proximal tibia;Lower limb mechanical axis offset distance;Neck shaft Angle;Distance of acetabular retraction;

—

Countries

China

Contacts

Public ContactYi Zeng

West China Hospital, Sichuan University

zengyigd@126.com+86 189 8060 2289

Outcome results

None listed

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