Hip Osteoarthritis

Lower Limb

Overview

Hip osteoarthritis is a progressive degenerative joint disease characterized by cartilage loss, osteophyte formation, and joint space narrowing in the hip joint. It results in pain, stiffness, and functional limitation, predominantly affecting middle-aged and older adults. The condition significantly impacts mobility and quality of life, requiring multimodal conservative management.

Pathophysiology

Hip osteoarthritis develops through progressive breakdown of articular cartilage due to mechanical stress, inflammatory processes, and biomechanical dysfunction. Risk factors include age, obesity, previous trauma, femoroacetabular impingement, dysplasia, and repetitive high-impact activities. Cartilage degradation triggers synovial inflammation, osteophyte formation at joint margins, subchondral bone sclerosis, and eventual joint space narrowing. This leads to altered joint mechanics, muscle atrophy, reduced proprioception, and compensatory movement patterns throughout the kinetic chain.

Patient Education

Hip osteoarthritis is a long-term condition requiring active participation in strengthening, flexibility work, and activity modification; while progressive, conservative management can significantly improve function and delay surgical intervention.

Typical Presentation

Site

Hip joint, often unilateral initially; may present in groin, anterior hip, lateral hip, or buttock; pain may refer to knee or lower back

Quality

Deep, aching pain with mechanical characteristics; grinding or clicking sensations; morning stiffness described as 'gelling'

Intensity

Variable 3-8/10, typically worse with activity and improving with rest; morning symptoms often severe but improve with movement

Aggravating

Prolonged sitting or hip flexion, stairs (ascending more than descending), walking long distances, standing from low chairs, internal rotation movements, heavy lifting, lying on affected side

Relieving

Rest, heat application, gentle movement after warm-up, anti-inflammatory medication, hip flexor stretching, sitting with hip supported

Associated

Morning stiffness 30-60 minutes, limited hip internal rotation and flexion, hip muscle weakness (gluteus medius, quadriceps), altered gait with antalgic pattern, clicking/clunking, occasional night pain, compensatory lower back pain

Orthopaedic Tests

FABER Test (Flexion-Abduction-External Rotation)

Procedure

Patient supine. Flex the affected hip and knee, place the lateral ankle on the opposite knee, then gently apply overpressure to the bent knee toward the table. Pain in the groin or anterior hip suggests positive finding.

Positive Finding

Groin pain or anterior hip pain, or inability to achieve full range of motion with overpressure

Sensitivity / Specificity

72% / 93%

Reiman et al., 2013, International Journal of Sports Physical Therapy

Interpretation

Positive result suggests intra-articular hip pathology including osteoarthritis, labral pathology, or capsular irritation. High specificity makes it useful for ruling in hip joint involvement.

FADIR Test (Flexion-Adduction-Internal Rotation)

Procedure

Patient supine. Hip flexed to 90°, knee flexed to 90°. Adduct the hip across the midline while internally rotating. Apply gentle overpressure at the end of range.

Positive Finding

Groin pain or anterior hip pain with this movement pattern

Sensitivity / Specificity

94% / 6%

Reiman et al., 2013, International Journal of Sports Physical Therapy

Interpretation

High sensitivity but very low specificity; positive result is common in hip osteoarthritis but does not rule out other conditions. Useful for initial screening but must be combined with other tests.

Log Roll Test (Internal Rotation in Prone or Supine)

Procedure

Patient supine, hip flexed to 90° and knee flexed to 90°. Internally rotate the hip by rolling the lower leg medially. Assess for pain and range of motion restriction.

Positive Finding

Groin or anterior hip pain; restriction of internal rotation ROM (normally 30–45°)

Sensitivity / Specificity

68% / 71%

Interpretation

Loss of internal rotation is a cardinal finding in hip osteoarthritis. Pain and loss of range suggest capsular restriction and intra-articular pathology. Good combined sensitivity and specificity when integrated with clinical presentation.

EFORT (Encapsular Fibrosis and Osteoarthritis Restriction Test)

Procedure

Patient prone or sidelying. Hip flexed to 90° and internally rotated maximally. Assess end-feel and compare to contralateral side.

Positive Finding

Firm or hard end-feel with pain; reduced internal rotation ROM compared to opposite hip

Sensitivity / Specificity

77% / 81%

Beumer et al., 2006, Arthritis and Rheumatism

Interpretation

Loss of internal rotation with capsular end-feel is highly suggestive of hip osteoarthritis and capsular contracture. Strong evidence for distinguishing OA from other causes of hip pain.

Thomas Test

Procedure

Patient supine at end of table. Flex one knee to chest to eliminate lumbar lordosis. Assess hip flexion contracture of opposite hip; measure angle between thigh and horizontal plane.

Positive Finding

Hip cannot extend fully to neutral; thigh remains elevated above the table (positive Thomas angle)

Sensitivity / Specificity

See current literature / See current literature

Interpretation

Hip flexion contracture is common in hip osteoarthritis due to capsular tightness and pain-avoidance posturing. Not diagnostic of OA alone but confirms loss of hip extension and may contribute to gait abnormality and functional limitation.

Trendelenburg Test and Gait Analysis

Procedure

Patient standing on one leg (affected side) for 20–30 seconds, or observe during single-leg stance and gait. Look for ipsilateral pelvic drop or trunk lean toward the stance leg.

Positive Finding

Pelvis drops on non-stance side; trunk leans toward stance side to maintain balance

Sensitivity / Specificity

See current literature / See current literature

Interpretation

Indicates gluteal weakness or pain avoidance in hip osteoarthritis. Often associated with lateral hip pain and gait dysfunction. Suggests hip abductor insufficiency secondary to pain or muscle inhibition.

⚠ Red Flags

  • •Sudden onset with severe pain and inability to bear weight suggesting acute fracture or dislocation
  • •Systemic symptoms (fever, night sweats, unintentional weight loss) suggesting inflammatory arthropathy or infection
  • •Progressive neurological deficit or cauda equina symptoms suggesting spinal involvement
  • •Signs of septic arthritis (severe pain, warmth, effusion, constitutional symptoms)
  • •Rapid progression of pain with acute functional loss suggesting acute exacerbation or occult fracture
  • •History of cancer with new hip pain suggesting metastatic disease

⚡ Yellow Flags

  • •High pain catastrophizing and fear-avoidance beliefs reducing activity levels
  • •Severe obesity limiting treatment options and prognosis
  • •Significant psychological distress or depression affecting recovery motivation
  • •Unrealistic expectations about treatment outcomes or complete resolution
  • •Social isolation or lack of support for rehabilitation compliance
  • •Work-related factors limiting activity modification capability
  • •Sleep disturbance due to nocturnal pain affecting healing and mood

Osteopathic Techniques

Region

Hip joint and acetabular region

Technique

Articulation

Rationale

Gentle oscillatory mobilization of the hip joint improves synovial fluid distribution, reduces pain through gate control mechanisms, and maintains joint mobility within pain-free ranges; particularly effective in early to moderate osteoarthritis

Region

Hip flexors (iliopsoas, rectus femoris)

Technique

Soft Tissue

Rationale

Hip flexor tightness increases anterior hip capsule compression and alters pelvic mechanics; soft tissue release reduces compensatory tension and improves hip extension range, reducing load on arthritic joint

Region

Piriformis and deep hip rotators

Technique

MET

Rationale

Muscle energy technique addressing external rotator tightness restores hip internal rotation, improves hip stability through better muscle balance, and reduces compensatory forces through the joint

Region

Lumbar spine and sacroiliac joints

Technique

Articulation

Rationale

Hip osteoarthritis commonly causes compensatory stress through the lumbar spine and sacroiliac joints; addressing these areas reduces referred pain and improves global pelvic mechanics

Region

Gluteal region and hip extensors

Technique

Soft Tissue

Rationale

Soft tissue release of gluteus maximus and medius addresses myofascial restrictions and improves neuromuscular activation patterns essential for pain-free hip function

Region

Whole pelvis and lower limb

Technique

Functional

Rationale

Functional technique allows joints to find neutral positions, reducing mechanical stress through the arthritic hip joint while maintaining muscle activation; reduces pain and improves proprioception

Add-On Approaches

Chinese Medicine

TCM approaches focus on Kidney and Liver meridian deficiency causing joint stagnation; acupuncture to GB34, LV3, and local points (GB29, GB30) combined with warming moxibustion may reduce pain and improve circulation

Chiropractic

Chiropractic care may address sacroiliac joint dysfunction and lumbar spine restrictions contributing to hip compensation; diversified adjustments to lumbar and sacroiliac joints may provide adjunctive relief

Physiotherapy

Progressive resistance training for hip abductors and extensors, proprioceptive training, aquatic therapy for pain-free strengthening, and functional movement retraining are evidence-based for improving strength and function

Remedial Massage

Deep tissue massage and myofascial release targeting hip flexors, adductors, and gluteal muscles reduce muscle guarding; trigger point therapy addresses referral patterns contributing to pain perception

Rehabilitation Exercises

Supine Hip Flexor Stretch (Modified Thomas Position)

Range of MotionBeginner

Piriformis Stretch (Supine Figure-4)

StretchingBeginner

Adductor Longus Stretch (Supine Butterfly)

StretchingBeginner

Supine Glute Bridges

StrengtheningBeginner

Sidelying Hip Abduction (Clamshells)

StrengtheningBeginner

Quadruped Hip Extension

StrengtheningIntermediate

Standing Single-Leg Hip Abduction with Support

StrengtheningIntermediate

Single-Leg Stance with Counter Support

BalanceIntermediate

Hip Hinge Movement Pattern Training

PosturalIntermediate

Sit-to-Stand from Elevated Surface

StrengtheningIntermediate

Aquatic Walking or Swimming

CardiovascularIntermediate

Standing Hip Flexion with Resistance Band

StrengtheningAdvanced

Referral Criteria

  • •Persistent severe pain unresponsive to 8-12 weeks of conservative management suggesting need for imaging or orthopedic evaluation
  • •Functional limitation affecting activities of daily living or employment requiring specialist assessment for joint replacement consideration
  • •Suspected septic arthritis or acute inflammatory process requiring urgent medical investigation
  • •Signs of systemic disease or polyarticular involvement suggesting rheumatological condition requiring rheumatology referral
  • •Significant obesity limiting treatment efficacy; referral to dietitian and exercise physiologist for weight management
  • •Progressive neurological signs or referred pain suggesting lumbar spine or nerve involvement requiring medical imaging and appropriate specialist review
  • •Chronic pain with significant psychological component or fear-avoidance behavior requiring psychologist or pain management specialist
  • •Failure to progress despite appropriate exercise and manual therapy; consideration for corticosteroid injection or orthopedic surgical consultation