Q Angle in Static and Dynamic Postures

NCT05894551 | Completed

• 1 other identifier: IstanbulUC_dynamicqangle
• Study Type: observational
• Target: 130
• Locations: 1 country
• Sites: 2

Brief Summary

The Q angle, also known as the quadriceps angle, is defined as the angle formed between the quadriceps muscles and the patella tendon. It was first described by Brattstrom in 1964 (1). The Q angle is the angle between the line extending from the anterior superior of the spina iliaca to the midpoint of the patella and the line extending from the midpoint of the patella to the tuberositas tibia (2). Normally, this angle is between 8-14 degrees in men and 11-20 degrees in women. Any alignment change that increases the Q angle is thought to increase the lateral force on the patella. The Q angle is generally evaluated in static postures in the literature. The Q angle value varies according to the patient's gender, the contractility of the quadriceps, and the patient's posture (standing or supine) (3). Q angle was evaluated in a static posture with a standard goniometer or computerized biophotogrammetry (4) Q angle changes with the forces applied by dynamic structures. It is insufficient to evaluate only in a static posture. Therefore, the aim of this study is to examine the effect of dynamic structures on the Q angle using 2D gait analysis (video) and to detect the early signs of deviation of changes in the q angle.

Conditions

Quadriceps Muscle; Orthopedic Disorder

Keywords

q angle; dynamic q angle; lower extremity function

Outcome Measures

Primary Outcomes (1)

• Q angle

  Q angle measurement in three different position; in supine, standing and midstance phase during gait. The static and dynamic positions of the participants will be recorded as a photo and frame from video recording, then the measurements will be conducted with 2-dimensions movement analysis software. The unit of measurement will be recorded in angle degree.

  baseline

Secondary Outcomes (7)

• Pelvic width

  baseline

• Thigh length

  baseline

• Femoral anteversion angle

  baseline

• Lower extremity muscle strength

  baseline

• Beighton score

  baseline

Study Arms (1)

healthy participants

Volunteers aged 18-25 years, healthy individuals without any spinal or neurologic injury and any injury leading to ligament, muscle or bone defect in their lower extremities

Other: Evaluation of q angles different positions; Other: Physical examination; Other: Functional mobility assessment

Interventions

Evaluation of q angles different positions OTHER

Q angle evaluation in two different static postures (upright and supine position) and dynamic posture during the midstance phase of the gait

healthy participants

Physical examination OTHER

With goniometric evaluations, the femoral anteversion angle will be measured. Pelvis width and thigh length will be measured with a tape measure. Quadriceps muscle strength, hamstring muscle strength, Hip abduction, adduction, internal and external rotation and extension muscle strength will be measured with hand-held dynamometer. Joint mobility will be assessed with the Beighton score and foot posture will be evaluated with the foot posture index-6 (FPI-6).

healthy participants

Functional mobility assessment OTHER

10-meter walking test will be conducted to understand functional mobility.

healthy participants

Eligibility Criteria

• Age: 18 Years - 25 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)
• Sampling Method: Probability Sample

Study Population

Volunteers aged 18-25 years, healthy individuals without any spinal or neurologic injury and any injury leading to ligament, muscle or bone defect in their lower extremities.

You may qualify if:

• being between the ages of 18-25
• being volunteer
• not have any condition that may affect cooperation

You may not qualify if:

• Individuals with any injury to their lower extremities that cause ligament, muscle or bone defect and any spinal or neurological injury
• individuals diagnosed with any knee disorder such as fracture, acute or chronic knee pain, patella dislocation

Sponsors & Collaborators

• Istanbul University - Cerrahpasa: lead

Study Sites (2)

Istanbul University-Cerrahpaşa

Istanbul, Istanbul, Turkey (Türkiye)

Location

Hatay Mustafa Kemal University

Hatay, Turkey (Türkiye)

Location

Related Publications (17)

• BRATTSTROEM H. SHAPE OF THE INTERCONDYLAR GROOVE NORMALLY AND IN RECURRENT DISLOCATION OF PATELLA. A CLINICAL AND X-RAY-ANATOMICAL INVESTIGATION. Acta Orthop Scand Suppl. 1964;68:SUPPL 68:1-148. No abstract available.

  PMID: 14171734 BACKGROUND

• Merchant AC, Fraiser R, Dragoo J, Fredericson M. A reliable Q angle measurement using a standardized protocol. Knee. 2020 Jun;27(3):934-939. doi: 10.1016/j.knee.2020.03.001. Epub 2020 Apr 12.

  PMID: 32295725 BACKGROUND

• Biedert RM, Warnke K. Correlation between the Q angle and the patella position: a clinical and axial computed tomography evaluation. Arch Orthop Trauma Surg. 2001 Jun;121(6):346-9. doi: 10.1007/s004020000239.

  PMID: 11482469 BACKGROUND

• Iunes DH, Castro FA, Salgado HS, Moura IC, Oliveira AS, Bevilaqua-Grossi D. Confiabilidade intra e interexaminadores e repetibilidade da avaliação postural pela fotogrametria. Rev Bras Fisioter. 2005;9(3):327-334.

  BACKGROUND

• Khasawneh RR, Allouh MZ, Abu-El-Rub E. Measurement of the quadriceps (Q) angle with respect to various body parameters in young Arab population. PLoS One. 2019 Jun 13;14(6):e0218387. doi: 10.1371/journal.pone.0218387. eCollection 2019.

  PMID: 31194851 BACKGROUND

• Daneshmandi H, Saki F, Shahheidari S, Khoori A. Lower extremity Malalignment and its linear relation with Q angle in female athletes. 3rd World Conf Educ Sci-2011. 2011;15: 3349-3354.

  BACKGROUND

• Nguyen AD, Boling MC, Levine B, Shultz SJ. Relationships between lower extremity alignment and the quadriceps angle. Clin J Sport Med. 2009 May;19(3):201-6. doi: 10.1097/JSM.0b013e3181a38fb1.

  PMID: 19423972 BACKGROUND

• Almeida GP, Silva AP, Franca FJ, Magalhaes MO, Burke TN, Marques AP. Q-angle in patellofemoral pain: relationship with dynamic knee valgus, hip abductor torque, pain and function. Rev Bras Ortop. 2016 Feb 9;51(2):181-6. doi: 10.1016/j.rboe.2016.01.010. eCollection 2016 Mar-Apr.

  PMID: 27069887 BACKGROUND

• Yilmaz A, Kabadayi M, Mayda M, Çavusoglu G, Tasmektepligi M. Analysis of Q Angle Values of Female Athletes from Different Branches. Sci Mov Heal. 2017;17: 141-146.

  BACKGROUND

• Omololu BB, Ogunlade OS, Gopaldasani VK. Normal Q-angle in an adult Nigerian population. Clin Orthop Relat Res. 2009 Aug;467(8):2073-6. doi: 10.1007/s11999-008-0637-1. Epub 2008 Nov 26.

  PMID: 19034592 BACKGROUND

• Greene CC, Edwards TB, Wade MR, Carson EW. Reliability of the quadriceps angle measurement. Am J Knee Surg. 2001 Spring;14(2):97-103.

  PMID: 11401177 BACKGROUND

• Raveendranath R, Nachiket S, Sujatha N, Priya R, Rema D. Bilateral Variability of the Quadriceps Angle (Q angle) in an Adult Indian Population. Iran J Basic Med Sci. 2011 Sep;14(5):465-71.

  PMID: 23493777 BACKGROUND

• Braz RG, Carvalho GA. Relationship between quadriceps angle (Q) and plantar pressure distribution in football players. Rev Bras Fisioter. 2010 Jul-Aug;14(4):296-302. Epub 2010 Sep 3. English, Portuguese.

  PMID: 20949230 BACKGROUND

• Choudhary R, Malik M, Aslam A, Khurana D, Chauhan S. Effect of various parameters on Quadriceps angle in adult Indian population. J Clin Orthop Trauma. 2019 Jan-Feb;10(1):149-154. doi: 10.1016/j.jcot.2017.11.011. Epub 2017 Nov 23.

  PMID: 30705551 BACKGROUND

• Guerra JP, Arnold MJ, Gajdosik RL. Q angle: effects of isometric quadriceps contraction and body position. J Orthop Sports Phys Ther. 1994 Apr;19(4):200-4. doi: 10.2519/jospt.1994.19.4.200.

  PMID: 8173567 BACKGROUND

• Rosario L.R. What is posture? a review of the literature in search of a definition. EC Orthopaedics. 2017;6(3):111-133.

  BACKGROUND

• Sacco I.C.N., AlIbert S., Queiroz B.W., Pripas D., KlelIng I., Kimura A.A. Reliability of photogrammetry in relation to goniometry for postural lower limb assessment. Rev Bras Fisioterpp. 2007;11(5):411-417.

  BACKGROUND

MeSH Terms

Conditions

Musculoskeletal Diseases

Interventions

Restraint, Physical

Intervention Hierarchy (Ancestors)

Behavior Control; Therapeutics; Immobilization; Investigative Techniques

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Asssistant professor

Study Record Dates

• First Submitted: May 31, 2023
• First Posted: June 8, 2023
• Study Start: May 1, 2022
• Primary Completion: June 1, 2023
• Study Completion: July 15, 2023
• Last Updated: November 28, 2025

Record last verified: 2025-11

Locations

TU (2)