Additional file 3. Diagnostic characteristics of physical test-hip pathology combinations from methodologically unacceptable study designs Article Title: A systematic review of the diagnostic performance of orthopedic physical examination tests of the hip. Journal: BMC Musculoskeletal Disorders Authors: Labib A. Rahman1; Sam Adie1,2,3 ; Justine M. Naylor 1,2,3; Rajat Mittal1,2,3; Sarah So1; Ian A. Harris1,2,3 1 South West Sydney Clinical School, University of New South Wales, 2Orthopaedic Department, Liverpool Hospital, 3Whitlam Orthopaedic Research Centre Study Test Pathology Reference Sensitivity Specificity Standard (95%CI) (95%CI) TP/ TN/ (TP+FN) (TN+FP) PPV NPV +LR -LR (95%CI) (95%CI) 1 Osteoarthritis Group: Asayama et al. Trendelenburg 2002 [1] Sign Youdas et al. Trendelenburg 2010 [2] Sign (Adduction Osteoarthritis Osteoarthritis Radiography 1.00 1.00 (implied) 0.80-1.00 0.91-1.00 8/8 18/18 0.55 0.70 0.40-0.68 0.55-0.83 11/20 14/20 0.96 0.18 0.92-0.98 0.13-0.21 109/ 114 15/85 0.26 0.92 0.22-0.29 0.88-0.95 41/159 162/177 Radiography 1.00 0.65 1.00 0.61 35.89a 0.06a 5.73 – 0.01 – 212.06a 0.31a 1.83 0.64 0.88-3.96 0.39-1.10 1.16 0.25 1.06-1.24 0.10-0.63 3.04 0.81 1.78-5.28 0.75-0.89 of Pelvis-onFemur Angle) Altman et al. Flexion ROM < Symptomatic 1991 [3] 115o Osteoarthritis Klässbo et al. Passive Flexion Symptomatic 2003 [4] ROM <110og Osteoarthritis Radiography Radiographyb 0.61 0.73 0.75 0.58 2 Altman et al. Internal Rotation Symptomatic 1991 [3] ROM < 15o Osteoarthritis Klässbo et al. Passive Internal Symptomatic 2003 [4] Rotation ROM < Osteoarthritis Radiography Radiographyb 0.66 0.72 0.60-0.71 0.64-0.79 75/114 61/85 0.12 0.95 0.09-0.14 0.92-0.97 19/159 168/177 0.03 0.99 0.02-0.04 0.98-1.00 5/159 176/177 0.01 0.93 0.00-0.04 0.92-0.95 2/159 165/177 0.07 0.99 0.76 0.68 0.61 0.55 2.33 0.48 1.67-3.32 0.37-0.63 2.35 0.93 1.12-5.00 0.88-0.99 5.57 0.97 0.87- 0.96-1.00 20og Klässbo et al. Passive Internal Symptomatic 2003 [4] Rotation ROM < Osteoarthritis Radiographyb 0.83 0.53 20o and Flexion 35.87 ROM <110og Klässbo et al. Passive Symptomatic 2003 [4] Abduction ROM Osteoarthritis Radiographyb 0.14 0.51 0.19 1.06 0.05-0.72 1.01-1.08 12.25 0.94 <20og Klässbo et al. Passive Symptomatic Radiographyb 0.92 0.54 3 2003 [4] Abduction ROM Osteoarthritis <20o, Flexion 0.05-0.07 0.98-1.00 11/159 176/177 0.04 1.00 0.02-0.04 0.99-1.00 6/ 159 177/ 177 0.35 0.90 0.22-0.42 0.77-0.97 7/20 18/20 2.08- 0.93-0.97 73.66 ROM <110o and Internal Rotation ROM < 20og Klässbo et al. Limited Passive Symptomatic 2003 [4] ROM in All 6 Osteoarthritis Radiographyb 1.00 0.54 Planesg Youdas et al. Isometric 2010 [2] Manual Muscle Osteoarthritis Radiography Test < 30% body 0.78 0.58 14.46a 0.96a 1.45 – 0.96 – 147.09a 0.99a 3.50 0.72 0.96- 0.60-1.01 14.17 weight Labral Pathology: 4 Leunig et al. Impingement Acetabular 2004 [5] Test Labral Tears Troelsen et al. Impingement Acetabular 2009 [6] Test Labral Tears Leunig et al. Impingement Acetabular 2004 [5] Test Labral MRA MRA MRA 1.00 0.00 1.00-1.00 0.00-0.00 18/18 0/10 0.59 1.00 0.54-0.59 0.21-1.00 10/17 1/1 1.00 0.00 1.00-1.00 0.00-0.00 12/12 0/16 1.00 0.00 1.00-1.00 0.00-0.00 13/13 0/15 0.41 1.00 0.64 1.00 0.43 - 0.13 - Hypertrophy Leunig et al. Impingement Presence of Soft 2004 [5] Test Tissue Ganglia MRA 0.46 - in the Acetabular 1.02a 0.58a 0.96 – 0.03 – 1.09a 9.95a 2.33a 0.56a 0.66 – 0.40 – 22.57a 2.30a 0.99a 1.31a 0.93 – 0.07 – 1.05a 22.49a 1.00a 1.14a 0.94 – 0.07 – 1.06a 19.65a 1.67a 0.78a Labrum Troelsen et al. FABER Test Acetabular MRA 1.00 0.09 5 Labral Tears 2009 [6] Troelsen et al. Resisted Straight Acetabular 2009 [6] Leg Raise Labral Tears MRA 0.37-0.41 0.21-1.00 7/17 1/1 0.06 1.00 0.02-0.06 0.31-1.00 1/17 1/1 0.33 0.86 0.20-0.39 0.58-0.97 5/15 6/7 0.60 1.00 0.47-0.60 0.72-1.00 1.00 0.06 0.45 – 0.57 – 16.39a 3.09a 0.33a 1.22a 0.04 – 0.92 – 3.95a 3.47a 2.33 0.78 0.48- 0.63-1.38 Gluteal Pathology: Woodley et al. Pain on Active Pathology of the 2008 [7] Hip Internal Gluteus Medius Rotation or Gluteus MRI 0.83 0.38 14.58 Minimus Tendons Woodley et al. Pain on Passive Pathology of the 2008 [7] Hip Abduction Gluteus Medius MRI 1.00 0.54 9.50a 0.43a 1.37 – 0.38 – 6 or Gluteus 9/15 7/7 0.53 0.86 0.39-0.59 0.56-0.97 8/15 6/7 0.47 0.86 0.33-0.52 0.56-0.97 7/15 6/7 0.47 0.86 0.33-0.52 0.56-0.97 7/15 6/7 93.70a 0.81a 3.73 0.54 0.88- 0.42-1.10 Minimus Tendons Woodley et al. Pain on Passive Pathology of the 2008 [7] Hip Internal Gluteus Medius Rotation or Gluteus MRI 0.89 0.46 22.11 Minimus Tendons Woodley et al. Pain on Resisted Pathology of the 2008 [7] Testing of the Gluteus Medius Gluteus or Gluteus Minimus Muscle Minimus MRI 0.88 0.43 3.27 0.62 0.74-19.6 0.49-1.20 3.27 0.62 0.74-19.6 0.49-1.20 Tendons Woodley et al. Pain on Resisted Pathology of the 2008 [7] Tests of Both the Gluteus Medius Gluteus Medius or Gluteus MRI 0.88 0.43 7 and Gluteus Minimus Minimus Muscle Tendons Woodley et al. Trendelenburg Pathology of the 2008 [7] Sign Gluteus Medius MRI 0.20 1.00 0.10-0.20 0.78-1.00 3/15 7/7 1.00 0.95 0.86-1.00 0.89-0.95 16/16 37/39 1.00 0.71 0.45-1.00 0.68-0.71 3/3 37/52 1.00 0.93 1.00 0.37 or Gluteus 3.50a 0.83a 0.39 – 0.76 – 37.07a 1.24a 15.53a 0.03a 6.68 – 0.00 – 19.42a 0.20a 2.99a 0.18a 1.26 - 0.02 - 3.47a 0.88a 11.35a 0.03a Minimus Tendons Lequesne et al. Pain on Single- Anterior Gluteus 2008 [8] Leg Stance Medius Tendon Within 30 Tear MRI 0.89 1.00 Seconds Lequesne et al. Pain on Single- Gluteus 2008 [8] Leg Stance Minimus Tendon Within 30 Tear MRI 0.17 1.00 Seconds Lequesne et al. Pain on Single- Tendinitis of the MRI 0.83 1.00 8 2008 [8] Leg Stance Anterior Gluteus Within 30 Medius and/or Seconds Gluteus 0.85-1.00 0.87-0.93 15/15 37/40 1.00 0.95 0.89-0.95 0.77-0.89 16/16 37/39 5.52 – 0.00 – 13.38a 0.22a 15.53a 0.03a 6.68 – 0.00 – 19.42a 0.20a 0.73 2.20 0.56-1.07 0.86-6.07 Minimus Tendons Lequesne et al. Pain on Single- Bursitis of the 2008 [8] Leg Stance Trochanteric, Within 30 Sub-Gluteus Seconds Medius and/or MRI 0.89 1.00 sub-Gluteus Minimus Bursae Intra-articular Hip Pathology: Martin et al. 2008 [9] FABER Test Intra-articular Diagnostic / 0.60 0.18 Hip Pathology Therapeutic 0.51-0.72 0.08-0.32 0.45 0.29 9 Intra-articular 15/25 4/22 0.59 0.32 0.45-0.74 0.21-0.44 13/22 9/28 0.78 0.10 0.73-0.87 0.03-0.22 21/27 2/21 Hip Injection Maslowski et FABER Test al. 2010 [10] Intra-articular Diagnostic / Hip Pathology Therapeutic 0.41 0.50 0.87 1.27 0.57-1.30 0.61-2.61 0.86 2.33 0.75-1.11 0.60-9.78 1.11 0.51 0.89-1.26 0.12-2.08 0.87 1.27 Intra-articular Hip Injectionc Martin et al. Impingement Intra-articular Diagnostic / 2008 [9] Test Hip Pathology Therapeutic Intra-articular Hip Injection Maslowski et Impingement Intra-articular Diagnostic / 0.91 0.18 al. 2010 [10] Test (Internal Hip Pathology Therapeutic 0.80-0.97 0.10-0.23 20/22 5/28 0.68 0.32 Rotation Over Pressure ) Stinchfield 0.47 0.25 0.71 Intra-articular e Maslowski et 0.53 Hip Injection Intra-articular Diagnostic / c 0.41 0.50 10 al. 2010 [10] Maneuvre Hip Pathology Therapeutic Intra-articular 0.54-0.82 0.21-0.43 15/22 9/28 0.69-1.42 0.43-2.18 2.63 0.53 1.25-6.59 0.43-0.81 2.34 0.73 0.94-6.92 0.62-1.04 Hip Injectionc Other Pathologies: Brown et al. Pain on Internal Pathology Local Radiography for 0.58 0.78 2004 [11] Rotation to the Hip Hips; and MRI or 0.54-0.62 0.57-0.91 45/77 14/18 0.39 0.83 0.34-0.42 0.63-0.94 30/77 15/18 0.92 0.30 Radiography for the Spine Brown et al. 2004 [11] Antalgic Gait Pathology Local Radiography for to the Hip Hips; and MRI or 0.91 0.24 Radiography for the Spine 11 Brown et al. List 2004 [11] Pathology Local Radiography for to the Hip Hips; and MRI or 0.08 0.83 0.04-0.10 0.69-0.94 6/77 15/18 0.29 0.94 0.25-0.30 0.77-0.99 22/77 17/18 0.67 1.00 0.57-0.67 0.85-1.00 16/24 16/16 0.67 0.17 0.47 1.11 0.14-1.64 0.96-1.39 5.14 0.76 1.06- 0.71-0.98 Radiography for the Spine Brown et al. Testing for Pathology Local Radiography for 2004 [11] Fixed Flexion to the Hip Hips; and MRI or Cantini et al. 2005 [12] Contraction of Radiography for the Hipd the Spine FABER Test Hip Synovitis MRI 0.96 0.24 29.78 1.00 0.67 22.44a 0.35a 3.01 - 0.32 – 218.51a 0.55a 12 Cantini et al. Lateral Hip Pain Inflammation of 2005 [12] on External the Trochanteric Rotation and Bursa MRI 0.97 1.00 0.94-0.97 0.39-1 37/38 2/2 1.00 0.48 0.84-1.00 0.38-0.48 15/15 12/25 0.00 0.99 0.00-0.13 0.99-0.99 0/16 326/331 0.19 0.92 0.07-0.41 0.91-0.93 3/16 303/331 1.00 0.67 Abduction Cantini et al. Pain Aggravated Inflammation of 2005 [12] by Extension, the Iliopsoas Relieved by Bursa MRI 0.54 1.00 5.77a 0.05a 1.42 – 0.03 – 52.85a 0.22a 1.87a 0.07a 1.30 – 0.01 – 1.99a 0.51a 1.78a 0.99a 0.17 – 0.85 – 16.68a 1.02a 2.22 0.89 0.74-5.56 0.64-1.03 Flexion Joe et al. 2002 Passive Flexion Asymptomatic [13] ROM < 100o. AVN of the Patient Supine. Femoral Head Joe et al. 2002 Passive Asymptomatic [13] Extension ROM AVN of the < 15o. Patient Femoral Head MRI MRI 0.00 0.10 0.95 0.96 Supine. 13 Joe et al. 2002 Passive Asymptomatic [13] Adduction ROM AVN of the < 20o. Patient Femoral Head MRI 0.00 0.95 0-0.17 0.95-0.96 0/16 314/331 0.31 0.86 0.14-0.55 0.85-0.87 5/16 283/331 0.50 0.67 0.28-0.72 0.66-0.68 8/16 223/331 0.38 0.73 0.19-0.61 0.72-0.74 6/16 240/331 0.00 0.95 0.56a 1.02a 0.06 – 0.83 – 4.68a 1.05a 2.15 0.80 0.94-4.07 0.53-1.01 1.53 0.74 0.84-2.27 0.42-1.08 1.36 0.86 0.66-2.30 0.53-1.14 Supine. Joe et al. 2002 Passive Asymptomatic [13] Abduction ROM AVN of the < 45o. Patient Femoral Head MRI 0.09 0.96 Supine. Joe et al. 2002 Passive Internal Asymptomatic [13] Rotation ROM < AVN of the 15o. Patient Femoral Head MRI 0.07 0.97 Supine. Joe et al. 2002 Passive External Asymptomatic [13] Rotation ROM < AVN of the 60o. Patient Femoral Head MRI 0.06 0.96 Supine. 14 Joe et al. 2002 Any Abnormal Asymptomatic [13] ROM Test in the AVN of the 6 Planes Femoral Head MRI 0.69 0.46 0.45-0.86 0.45-0.47 11/16 153/331 0.00 0.97 0-0.15 0.97-0.98 0/16 322/331 0.00 0.99 0-0.08 0.99-1 0/16 329/331 0.00 0.98 0-0.14 0.98-0.99 0/16 324/331 0.06 0.97 1.28 0.68 0.82-1.62 0.30-1.22 1.03a 1.00a 0.10 – 0.83 – 9.09a 1.03a 3.91a 0.98a 0.35 – 0.88 – 41.89a 1.01a 1.30a 0.99a 0.13 – 0.84 – 11.82a 1.02a Described Above. Patient Supine. Joe et al. 2002 Pain on Passive Asymptomatic [13] Flexion. Patient AVN of the Supine. Femoral Head Joe et al. 2002 Pain on Passive Asymptomatic [13] Extension. AVN of the Patient Supine. Femoral Head Joe et al. 2002 Pain on Passive Asymptomatic [13] Adduction. AVN of the Patient Supine. Femoral Head MRI MRI MRI 0.00 0.00 0.00 0.95 0.95 0.95 15 Joe et al. 2002 Pain on Passive Asymptomatic [13] Abduction. AVN of the Patient Supine. Femoral Head Joe et al. 2002 Pain on Passive Asymptomatic [13] Internal AVN of the Rotation. Patient Femoral Head MRI MRI 0.00 0.97 0-0.16 0.97-0.98 0/16 321/331 0.1250 0.86 0.04-0.35 0.86-0.88 2/16 286/331 0.00 0.91 0-0.18 0.91-0.92 0/16 301/331 0.13 0.71 0.04-0.35 0.70-0.72 2/16 234/331 0.00 0.04 0.95 0.95 0.93a 1.00a 0.09 – 0.83 – 8.14a 1.03a 0.92 1.01 0.25-2.78 0.75-1.12 0.32a 1.07a 0.03 – 0.86 – 2.60a 1.10a 0.43 1.24 0.12-1.25 0.90-1.37 Supine. Joe et al. 2002 Pain on Passive Asymptomatic [13] External AVN of the Rotation. Patient Femoral Head MRI 0.00 0.95 Supine. Joe et al. 2002 Pain on Any Asymptomatic [13] Passive Motion AVN of the Test in the 6 Femoral Head MRI 0.02 0.94 Planes Described Above. Patient 16 Supine. Joe et al. 2002 Pain Complexf Asymptomatic MRI AVN of the [13] 0.25 0.71 0.10-0.49 0.70-0.72 4/16 235/331 0.88 0.34 0.65-0.97 0.33-0.35 14/16 113/331 0.00 0.79 0.00-0.60 0.79-0.87 0/2 11/14 0.07 0.98 0.02-0.18 0.98-0.98 2/30 675/ 690 0.00 0.98 0.04 0.95 0.86 1.06 0.35-1.75 0.71-1.28 1.33 0.37 0.97-1.48 0.10-1.07 0.71a 1.09a 0.07 – 0.43 – 4.49a 1.33a 3.07 0.95 0.79- 0.83-1.01 Femoral Head Joe et al. 2002 Exam Complex h Asymptomatic MRI AVN of the [13] 0.06 0.98 Femoral Head Robb et al. Impingement Acetabular 2009 [14] Test Retroversion Röder et al. Flexion ROM < Uncemented 2003 [15] 70o Acetabular Cup Radiography Radiography 0.00 0.12 0.85 0.96 Loosening Röder et al. Flexion ROM < Uncemented Radiography 11.05 0.00 0.98 0.83a 1.00a 17 2003 [15] 70o Acetabular Cup Loosening Röder et al. Flexion ROM < Cemented 2003 [15] 70o Acetabular Cup Radiography 0.00-0.10 0.98-0.99 0/33 1641/ 1670 0.00 0.96 0.00-0.34 0.96-0.96 0/7 712/ 745 0.08 0.94 0.04-0.16 0.94-0.95 5/61 410/ 435 0.14 0.97 0.05-0.31 0.96-0.98 3/21 428/ 442 0.15 0.99 0.05-0.22 0.99-1.00 0.00 0.99 Loosening Röder et al. Flexion ROM < Cemented 2003 [15] 70o Acetabular Cup Radiography 0.17 0.88 0.09 – 0.90 – 7.41a 1.02a 1.39a 0.98a 0.14 – 0.64 – 9.43a 1.04a 1.43 0.97 0.57-3.41 0.88-1.03 4.51 0.89 1.43- 0.71-0.98 Loosening Röder et al. Flexion ROM < Uncemented 2003 [15] 70o Femoral Stem Radiography Loosening Röder et al. Flexion ROM < Uncemented 2003 [15] 70o Femoral Stem Radiography 0.18 0.96 12.90 0.67 0.94 25.69 0.85 3.48- 0.78-0.96 18 Loosening Röder et al. Flexion ROM < Cemented 2003 [15] 70o Femoral Stem Radiography Loosening Röder et al. Flexion ROM < Cemented 2003 [15] 70o Femoral Stem Radiography 2/13 166/ 167 0.03 0.95 0.01-0.08 0.95-0.95 2/80 1819/ 1912 0.07 0.96 0.04-0.11 0.96-0.97 9/138 863/ 898 0.55 1.00 0.53-0.55 0.98-1.00 193.36 0.04 0.20 0.96 0.87 0.51 1.03 0.14-1.81 0.96-1.05 1.67 0.97 0.83-3.33 0.92-1.01 155.00a 0.45a 17.25 – 0.45 – 1490.98a 0.49a Loosening Zeren et al. Active Range of Biceps Femoris 2006 [16] Motion Test Muscle-Strain (Pain on Active Injuries Hip Extension Ultrasonography with an 77/ 140 1.00 0.69 140/ 140 Extended Knee; Active Pain on Knee Flexion) 19 Zeren et al. Passive Range of Biceps Femoris 2006 [16] Motion Test Muscle-Strain (Pain on Passive Injuries Ultrasonography 0.57 1.00 0.55-0.57 0.98-1.00 80/ 140 140/ 140 0.61 1.00 0.58-0.61 0.98-1.00 1.00 0.70 161.00a 0.43a 17.96 – 0.43 – 1548.37a 0.47a 171.00a 0.40a 19.16 – 0.39 – 1643.85a 0.43a Hip Flexion; Pain on Passive Knee Extension) Zeren et al. Resisted Range Biceps Femoris 2006 [16] of Motion Tests Muscle-Strain (Pain on Injuries Ultrasonography Resisted Hip Extension with 85/ 140 1.00 0.72 140/ 140 an Extended Knee, Pain on Resisted Hip Rotation in the Neural Position; Pain on Knee 20 Flexion) Zeren et al. Taking Off the Biceps Femoris 2006 [16] Shoe Test Muscle-Strain Ultrasonography 1.00 1.00 0.99-1.00 0.99-1.00 Injuries 140/ 140 1.00 1.00 281.00a 0.00a 49.48 – 0.00 – 1595.80a 0.02a 140/ 140 Table Legend: Positive Predictive Value (PPV), Negative Predictive Value (NPV), Positive Likelihood Ratio (+LR), Negative Likelihood Ratio (-LR), 95% Confidence Interval (95%CI), True Positives (TP), False Positives (FP), True Negatives (TN), False Negatives (FN), Range of Motion (ROM). All values rounded to 2 decimal places. b Klässbo & Harms-Ringdahl [4] reported multiple thresholds for a positive index test result. We elected to use the definition based on the mean for symptom-free hips in their study. 21 c Maslowski et al [10] measured pain relief following intra-articular hip injection using two separate methods, one involving a visual analog scale and the other based on patient estimation. Our data is based on the measurement using the visual analog scale. d The patient lies supine. The testing knee and hip are flexed as far as possible. The contralateral hip is observed for an inability to extend flat. e Original test description f Pain complex was defined as: pain on any passive motion test in 6 planes; or pain on provocative tests including Patrick's test, Thomas test, Ober's test, straight leg raise, axial loading maneuver, femoral head compression test and distraction in the supine position with leg extended; or single leg stand for 2 minutes or single leg hip for 10-20 repetitions g Used reliability precautions described by Stratford et al [17] and Gajdosik and Bohannon [18]. h Exam complex was defined as: restricted passive range of motion in any of 6 planes (flexion < 100o, extension < 15o, adduction < 20o, abduction < 45o, internal rotation <15o or external rotation < 60o) or pain complex, which was defined as: pain on any passive motion test in 6 planes; or pain on provocative tests including Patrick's test, Thomas test, Ober's test, straight leg raise, axial loading maneuver, femoral head compression test and distraction in the supine position with leg extended; or single leg stand for 2 minutes or single leg hip for 10-20 repetitions References: 22 1. Asayama I, Naito M, Fujisawa M, Kambe T: Relationship between radiographic measurements of reconstructed hip joint position and the Trendelenburg sign. The Journal of arthroplasty 2002, 17:747-751. 2. Youdas JW, Madson TJ, Hollman JH: Usefulness of the Trendelenburg test for identification of patients with hip joint osteoarthritis. Physiotherapy theory and practice 2010, 26:184-194. 3. Altman R, Alarcon G, Appelrouth D, Bloch D, Borenstein D, Brandt K, Brown C, Cooke TD, Daniel W, Feldman D, et al.: The American College of Rheumatology criteria for the classification and reporting of osteoarthritis of the hip. Arthritis and rheumatism 1991, 34:505-514. 4. Klassbo M, Harms-Ringdahl K, Larsson G: Examination of passive ROM and capsular patterns in the hip. Physiotherapy research international : the journal for researchers and clinicians in physical therapy 2003, 8:1-12. 5. Leunig M, Werlen S, Ungersbock A, Ito K, Ganz R: Evaluation of the acetabular labrum by MR arthrography. The Journal of bone and joint surgery British volume 1997, 79:230-234. 6. Troelsen A, Mechlenburg I, Gelineck J, Bolvig L, Jacobsen S, Soballe K: What is the role of clinical tests and ultrasound in acetabular labral tear diagnostics? Acta orthopaedica 2009, 80:314-318. 7. Woodley SJ, Nicholson HD, Livingstone V, Doyle TC, Meikle GR, Macintosh JE, Mercer SR: Lateral hip pain: findings from magnetic resonance imaging and clinical examination. The Journal of orthopaedic and sports physical therapy 2008, 38:313328. 23 8. Lequesne M, Mathieu P, Vuillemin-Bodaghi V, Bard H, Djian P: Gluteal tendinopathy in refractory greater trochanter pain syndrome: diagnostic value of two clinical tests. Arthritis and rheumatism 2008, 59:241-246. 9. Martin RL, Irrgang JJ, Sekiya JK: The diagnostic accuracy of a clinical examination in determining intra-articular hip pain for potential hip arthroscopy candidates. Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association 2008, 24:1013-1018. 10. Maslowski E, Sullivan W, Forster Harwood J, Gonzalez P, Kaufman M, Vidal A, Akuthota V: The diagnostic validity of hip provocation maneuvers to detect intra-articular hip pathology. PM & R : the journal of injury, function, and rehabilitation 2010, 2:174-181. 11. Brown MD, Gomez-Marin O, Brookfield KF, Li PS: Differential diagnosis of hip disease versus spine disease. Clinical orthopaedics and related research 2004:280-284. 12. Cantini F, Niccoli L, Nannini C, Padula A, Olivieri I, Boiardi L, Salvarani C: Inflammatory changes of hip synovial structures in polymyalgia rheumatica. Clinical and experimental rheumatology 2005, 23:462-468. 13. Joe GO, Kovacs JA, Miller KD, Kelly GG, Koziol DE, Jones EC, Mican JM, Masur H, Gerber L: Diagnosis of avascular necrosis of the hip in asymptomatic HIV-infected patients: Clinical correlation of physical examination with magnetic resonance imaging. Journal of back and musculoskeletal rehabilitation 2002, 16:135-139. 24 14. Robb CA, Datta A, Nayeemuddin M, Bache CE: Assessment of acetabular retroversion following long term review of Salter's osteotomy. Hip international : the journal of clinical and experimental research on hip pathology and therapy 2009, 19:8-12. 15. Roder C, Eggli S, Aebi M, Busato A: The validity of clinical examination in the diagnosis of loosening of components in total hip arthroplasty. The Journal of bone and joint surgery British volume 2003, 85:37-44. 16. Zeren B, Oztekin HH: A new self-diagnostic test for biceps femoris muscle strains. Clinical journal of sport medicine : official journal of the Canadian Academy of Sport Medicine 2006, 16:166-169. 17. Stratford P, Agostino V, Brazeau C, Gowitzke BA: Realibility of joint angle measurement: discussion of methodology issues. Physiotherapy Canada 1984, 36:5-9. 18. Gajdosik RL, Bohannon RW: Clinical measurement of range of motion. Review of goniometry emphasizing reliability and validity. Physical therapy 1987, 67:1867-1872. 25