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Comparison of Two Protocols for Patellofemoral Pain Syndrome (PFPS)

This study has been completed.
Information provided by (Responsible Party):
Gabriel Peixoto Leão Almeida, PT, University of Sao Paulo Identifier:
First received: September 16, 2012
Last updated: September 21, 2012
Last verified: September 2012
The patellofemoral pain syndrome (PFPS) is defined as a painful complaint in the anterior aspect of the knee, although peripatellar pain and / or retropatellar are also common. In general, conservative treatment is the initial option of choice for patients with PFPS, however, the lack of a specific causal factor makes it difficult to choose the best treatment so early. This way, the purpose of this study is investigate the effects of the quadriceps femoris strengthening versus hamstring stretching in patients with pattellofemoral pain.

Condition Intervention Phase
Patellofemoral Pain Syndrome Other: Stretching Hamstring Other: Quadriceps Strengthening Phase 1 Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Quadriceps Femoris Strengthening Versus Hamstring Stretching for Patellofemoral Pain Syndrome: A Randomized Clinical Trial.

Further study details as provided by Gabriel Peixoto Leão Almeida, PT, University of Sao Paulo:

Primary Outcome Measures:
  • Numeric Pain Rating Scale [ Time Frame: Participants will be followed for the duration of 8 weeks. ]
    Pain was assessed using an 11-point numeric pain rating scale (NPRS), on which 0 denoted an absence of pain and 10 denoted unbearable pain.

Secondary Outcome Measures:
  • Lysholm Scale [ Time Frame: Participants will be followed for the duration of 8 weeks. ]
    This questionnaire is made up of eight items with objective response options. The final score is expressed in nominal and ordinal form, as follows: 95 to 100 points - excellent; 84 to 94 points - good; 65 to 83 points - fair; and 64 or fewer points - poor.

Enrollment: 20
Study Start Date: March 2008
Study Completion Date: September 2011
Primary Completion Date: February 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Quadriceps Strengthening Other: Quadriceps Strengthening
Active Comparator: Stretching Hamstring Other: Stretching Hamstring


Ages Eligible for Study:   18 Years to 40 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Symptoms of anterior knee pain for at least 1 moth;
  • Average pain level of 3 or more on a 10-cm visual analogue scale during stepping up and down a 25-cm height;
  • Anterior or retropatellar knee pain on at least 2 of the following activities: prolonged sitting, climbing stairs, squatting, running, kneeling, and hopping/jumping;
  • Presence of 2 of the following clinical criteria on assessment: pain during apprehension test, pain during the patellar compression test, and crepitation during the compression test.

Exclusion Criteria:

  • Previous knee surgery or arthritis;
  • History of patellar dislocation or subluxation, malalignment, or ligament laxity;
  • Patellar tendon pathology or chondral damage;
  • Spinal referred pain;
  • History of other abnormalities such as leg length inequalities (>2 cm);
  • Medication as a part of the treatment;
  • Previous physical therapy or acupuncture treatment for the knee within the previous 30 days.
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Please refer to this study by its identifier: NCT01691170

Physical Therapy, Speech and Occupational Therapy Department, University of São Paulo.
São Paulo, Brazil, 05360-000
Sponsors and Collaborators
University of Sao Paulo
  More Information

Responsible Party: Gabriel Peixoto Leão Almeida, PT, Principal Investigator, University of Sao Paulo Identifier: NCT01691170     History of Changes
Other Study ID Numbers: USP01
Study First Received: September 16, 2012
Last Updated: September 21, 2012

Keywords provided by Gabriel Peixoto Leão Almeida, PT, University of Sao Paulo:
Pattelofemoral pain syndrome

Additional relevant MeSH terms:
Somatoform Disorders
Patellofemoral Pain Syndrome
Pathologic Processes
Mental Disorders
Joint Diseases
Musculoskeletal Diseases processed this record on September 21, 2017