Hip scores and calculators
16 hip instruments, grouped by what they do. Each carries its scoring formula in full, published clinically important thresholds where they exist, and its copyright status.
Conditions covered
Acetabular labral tear · Acetabular undercoverage · Ankle sprain · Avascular necrosis · Avascular necrosis of the hip · Bone metastasis · Cam morphology · Chondral injury of the hip · Congenital hip dislocation · Corticosteroid-associated osteonecrosis · Developmental dysplasia of the hip · FAI syndrome · Femoral neck fracture · Femoroacetabular impingement · Groin pain · Hip dysplasia · Hip fracture · Hip instability · Hip osteoarthritis · Hip pain · Impending pathological fracture · Intracapsular hip fracture · Irritable hip · Knee osteoarthritis · Labral tear · Loose femoral stem · Lower limb musculoskeletal disorder · Metastatic bone disease · Multiple myeloma · Osteoarthritis · Osteonecrosis of the femoral head · Paediatric limp · Periprosthetic femoral fracture · Periprosthetic fracture after hemiarthroplasty · Periprosthetic fracture after total hip arthroplasty · Post-operative lower limb rehabilitation · Post-traumatic hip arthritis · Secondary hip osteoarthritis · Septic arthritis · Transient synovitis · Vertical femoral neck fracture
Patient-reported outcome measure4
- HOOS40 itemsHip disability and Osteoarthritis Outcome ScoreThe HOOS is a 40-item patient-reported questionnaire that scores hip function as five separate subscales — Symptoms, Pain, Activities of Daily Living, Sport and Recreation, and Hip-related Quality of Life — each from 0 (extreme problems) to 100 (no problems).
- HOS26 itemsHip Outcome ScoreThe Hip Outcome Score is a 28-item patient-reported questionnaire for non-arthritic hip conditions that yields two independent percentage scores — an Activities of Daily Living subscale, administered as 19 questions of which 17 are scored, and a 9-item Sports subscale — each running from 0% (unable to perform the listed activities) to 100% (no difficulty at all).
- LEFS20 itemsLower Extremity Functional ScaleThe LEFS is a 20-item patient-reported questionnaire that measures difficulty with everyday lower limb activities on a single 0 to 80 scale, where 80 indicates no difficulty and a change of 9 points is the smallest difference patients reliably notice.
- Oxford Hip Score12 itemsOxford Hip ScoreThe Oxford Hip Score is a 12-item patient-reported questionnaire about hip pain and everyday function over the past four weeks, each item scored 0 to 4 and summed to a total of 0 to 48 in which 48 represents the best possible hip — it is licensed by Oxford University Innovation, so the item wording is not reproduced here.
Clinical calculator6
- Alpha Angle1 itemsAlpha Angle for Cam MorphologyThe alpha angle quantifies loss of sphericity at the femoral head-neck junction, the imaging marker of cam-type femoroacetabular impingement, with published thresholds for cam morphology ranging from 50 to 60 degrees depending on the imaging view used.
- Harris Hip ScoreHarris Hip ScoreThe Harris Hip Score is a 100-point clinician-administered hip assessment combining 44 points for pain, 47 for function, 4 for absence of deformity and 5 for range of motion, where 90 or above is graded excellent and below 70 poor.
- LCEA1 itemsLateral Centre-Edge Angle of WibergThe lateral centre-edge angle measures how far the acetabulum covers the femoral head laterally on an anteroposterior pelvis radiograph, where below 18 degrees indicates frank dysplasia, 18 to 25 degrees is borderline, 25 to 39 degrees is normal, and 40 degrees or more indicates overcoverage.
- Mirels4 itemsMirels' Score for Pathological Fracture RiskMirels' score estimates the risk of pathological fracture through a long bone metastasis by scoring four variables — site, pain, radiographic appearance and lesion size — from 1 to 3 each, giving a total from 4 to 12, where 9 or more is the conventional threshold for prophylactic fixation.
- Pauwels1 itemsPauwels Classification of Femoral Neck FracturesThe Pauwels classification grades an intracapsular femoral neck fracture by the angle between the fracture line and the horizontal plane on an anteroposterior radiograph — type I below 30°, type II from 30° to 50°, and type III above 50° — because the more vertical the fracture, the greater the shear component across it and the higher the risk of fixation failure.
- Tönnis Angle1 itemsTönnis Angle (Acetabular Index of the Weight-Bearing Zone)The Tönnis angle measures the slope of the acetabular weight-bearing zone on an anteroposterior pelvis radiograph, where 0 to 10 degrees is normal, above 10 degrees indicates a steep upsloping roof associated with dysplasia and instability, and a negative angle indicates overcoverage.
Classification system5
- Crowe2 itemsCrowe Classification of Developmental Dysplasia of the HipThe Crowe classification grades developmental dysplasia of the hip in adults by how far the femoral head has migrated proximally, expressed as a percentage of the femoral head height and estimated from the pelvic height, giving four types: under 50%, 50–75%, 75–100% and over 100% subluxation.
- Ficat-Arlet2 itemsFicat and Arlet Classification of Osteonecrosis of the Femoral HeadThe Ficat and Arlet classification stages osteonecrosis of the femoral head from 0 to IV by the most advanced imaging finding present — normal imaging, an abnormal MRI with a normal radiograph, sclerosis or cysts with a round head, subchondral collapse, and finally joint space narrowing — with stage III marking the point at which the head has collapsed and head-preserving surgery stops working.
- Garden2 itemsGarden Classification of Femoral Neck FracturesThe Garden classification grades intracapsular femoral neck fractures into four types by the completeness of the fracture line and the degree of displacement on an anteroposterior radiograph, where types I and II are non-displaced and types III and IV are displaced.
- Kellgren-Lawrence1 itemsKellgren-Lawrence Classification of OsteoarthritisThe Kellgren-Lawrence classification grades radiographic osteoarthritis from 0 to 4 based on osteophyte formation, joint space narrowing, subchondral sclerosis and bone contour deformity, with grade 2 conventionally taken as the threshold for definite radiographic osteoarthritis.
- Vancouver4 itemsVancouver Classification of Periprosthetic Femoral FracturesThe Vancouver classification sorts a periprosthetic femoral fracture occurring after hip arthroplasty into type A at the trochanters, type B around or just below the stem — subdivided by whether the stem is well fixed (B1), loose with adequate bone stock (B2), or loose with deficient bone stock (B3) — and type C well distal to the stem, and it is the system that decides whether the fracture is fixed or the stem is revised.