The seed planted by efforts of the APTA's Foundation for Physical Therapy and its recipients may represent the foundation for the future of our profession.

J Orthop Sports Phys Ther. 2006; 36(3):128-129. doi:10.2519/jospt.2006.0103

During APTA's Combined Sections Meeting in San Diego last month, the JOSPT recognized for the second time the most outstanding research manuscript and clinical practice papers published in the Journal within a calendar year.

J Orthop Sports Phys Ther. 2006; 36(3):130. doi:10.2519/jospt.2006.0104

Study Design: Case control study. Objectives: The objectives of this study are: (1) to perform factor analyses on data from the 8 components of the star excursion balance test (SEBT) in subjects with and without chronic ankle instability (CAI) in an effort to reduce the number of components of the SEBT, (2) to assess the relationships between performance of the different reach directions using correlation analyses, and (3) to determine which components of the SEBT are most affected by CAI. Background: The SEBT is a series of 8 lower-extremity–reaching tasks purported to be useful in identifying lower extremity functional deficits. Methods and Measures: Forty-eight young adults with unilateral CAI (22 males, 26 females; mean ± SD age, 20.9 ± 3.2 years; mean ± SD height, 173.6 ± 11.1 cm; mean ± SD mass, 80.1 ± 22.1 kg) and 39 controls (23 males, 16 females; mean ± SD age, 20.7 ± 2.4 years; mean ± SD height, 174.1 ± 12.9 cm; mean ± SD mass, 75.1 ± 18.6 kg) performed 3 trials of the 8 tasks with each of their limbs. Separate exploratory factor analyses were performed on data for involved limbs of the CAI group, uninvolved limbs of the CAI and control groups, and both limbs of the CAI and control groups. Pearson product moment correlations were calculated to identify the relationships between the different reach directions. A series of eight 2 × 2 analyses of variance were calculated to determine the influence of group (CAI, control) and side (involved, uninvolved) on performance of the 8 tasks. Results: For all 3 factor analyses, only 1 factor in each analysis produced an eigenvalue greater than 1 and the posteromedial reach score was the most strongly correlated task with the computed factor (α>.90), although all 8 tasks produced alpha scores greater than .67. Bivariate correlations between specific reach directions ranged from .40 to .91. Subjects with CAI reached significantly less on the anteromedial, medial, and posteromedial directions when balancing on their involved limbs compared to their uninvolved limbs and the side-matched limbs of controls. Conclusions: The posteromedial component of the SEBT is highly representative of the performance of all 8 components of the test in limbs with and without CAI. There is considerable redundancy in the 8 tasks. The anteromedial, medial, and posteromedial reach tasks may be used clinically to test for functional deficits related to CAI in lieu of testing all 8 tasks. There is a need for a hypothesis-driven study to confirm the results of this exploratory study.

J Orthop Sports Phys Ther. 2006;36(3):131-137. doi:10.2519/jospt.2006.2103 

Key Words: dynamic postural control, functional testing, lower extremity

Study Design: Psychometric evaluation of a cross-sectional survey. Objectives: The purpose of this study was to examine the psychometric properties of reliability and validity of the Penn Shoulder Score (PSS). Background: Shoulder outcome measures are used to assess patient self-report levels of pain, satisfaction, and function. The PSS is a 100-point shoulder-specific self-report questionnaire consisting of 3 subscales of pain, satisfaction, and function. This scale has been utilized in the literature. However, the measurement properties of reliability and validity, including responsiveness, of the PSS subscales and overall scale need to be established. Methods and Measures: Patients (n = 40) with shoulder disorders undergoing a course of outpatient physical therapy completed the PSS at initial visit and again within 72 hours to assess test-retest reliability. The Constant Shoulder Score (CSS) and the American Shoulder and Elbow Surgeons Shoulder Score (ASES) were also completed at the initial visit and compared to the PSS to assess convergent construct validity. A separate cohort of patients (n = 109) completed the PSS at initial visit and 4 weeks later. These scores were used to assess internal consistency and responsiveness. Results: Reliability analysis revealed a test-retest ICC _2,1 of 0.94 (95% CI, 0.89-0.97). Internal consistency analysis revealed a Cronbach alpha of 0.93. The standard error of measurement (SEM) was ± 8.5 scale points (based on a 90% CI) and the minimal detectable change (MDC) was ± 12.1 scale points (based on a 90% CI). The minimal clinically important difference (MCID) for improvement was 11.4 points. Pearson product moment correlation coefficients between the PSS and the CSS and ASES were 0.85 and 0.87, respectively. Responsiveness analysis revealed an effect size of 1.01 and a standardized response mean of 1.27. Conclusions: This study has demonstrated that the PSS is a reliable and valid measure for reporting outcome of patients with various shoulder disorders.

J Orthop Sports Phys Ther. 2006;36(3):138-151. doi:10.2519/jospt.2006.2090

Key Words: outcome assessment, psychometrics, reliability, validity

Study Design: Case series. Objectives: To describe an established method of diagnosing cervical radiculopathy (CR) using a clinical prediction rule (CPR), and to describe the management of 6 patients using intermittent cervical traction (ICT), thoracic thrust joint manipulation (TJM), and exercise. Background: Many patients present with unilateral arm pain without having undergone magnetic resonance imaging (MRI) of the cervical spine. Using a CPR has demonstrated high levels of specificity to rule in cervical radiculopathy. ICT and manual therapy (including thoracic TJM) are widely used in clinical settings to treat cervical radiculopathy. Case description: Six patients (3 men, 3 women) were diagnosed with cervical radiculopathy using the CPR. All patients were treated with ICT, thoracic TJM, and exercise. The Northwick Park Neck Questionnaire served as the outcome measure. Outcomes: The CPR accurately identified CR (secondary to a disc herniation) in 4 out of 4 patients when compared to the results of a reference standard (MRI). Six patients were seen from 5 to 18 sessions over a 19- to 56-day period. Reduction in Northwick Park Neck Questionnaire scores ranged from 13% to 88%. One patient did not improve significantly and underwent neck surgery. Discussion: Using the CPR may be beneficial in diagnosing CR, so the clinician can devise a plan of care and assess treatment outcomes in a relatively homogenous group of patients. It is possible that a treatment regimen of ICT, thoracic TJM, and exercise will aid in centralizing radicular symptoms and improving functional outcomes in patients with CR.

J Orthop Sports Phys Ther. 2006;36(3):152-159. doi:10.2519/jospt.2006.2056

Key Words: cervical spine, intermittent traction, thoracic thrust joint manipulation

Study Design: Literature review of quality of clinical trials. Objective: To determine the methodological quality of published randomized controlled trials in the last decade that used spinal manipulation and/or mobilization to treat patients with tension-type headache (TTH), cervicogenic headache (CeH), and migraine (M). Background: TTH, CeH, and M are the most prevalent types of headaches seen in adults. Individuals who have headaches frequently use physical therapy, manual therapy, or chiropractic care. Randomized controlled trials are considered an optimal method with which to assess the efficacy of any intervention. Methods: Computerized literature searches were performed in MEDLINE, EMBASE, COCHRANE, AMED, MANTIS, CINHAL, and PEDro databases. Randomized controlled trials in which spinal manipulation and/or mobilization was used for TTH, CeH, and M that were published in a peer-reviewed journal as full text and included at least 1 clinically relevant outcome measure (ie, headache intensity, duration, or frequency) were reviewed. Two reviewers using a set of predefined criteria independently assessed the methodological quality of the studies. Results: Only 8 studies met all the inclusion criteria. One clinical trial evaluated spinal manipulation and mobilization together, and the remaining 7 assessed spinal manipulative therapy. No controlled trials that analyzed exclusively the effects of spinal mobilization were found. Methodological scores ranged from 35 to 56 points out of a theoretical maximum of 100 points, indicating an overall poor methodology of the studies. Only 2 studies obtained a high-quality score (greater than 50 points). No significant differences in quality scores were found based on the type of headache investigated. Methodological quality was neither associated with the year of publication (before 2000, or later) nor with the results (positive, neutral, negative) reported in the studies. The most common flaws were a small sample size, the absence of a placebo control group, lack of blinded patients, and no description of the manipulative procedure. Conclusions: There are few published randomized controlled trials analyzing the effectiveness of spinal manipulation and/or mobilization for TTH, CeH, and M in the last decade. In addition, the methodological quality of these papers is typically low. Clearly, there is a need for high-quality randomized controlled trials assessing the effectiveness of these interventions in these headache disorders.

J Orthop Sports Phys Ther. 2006;36(3):160-169. doi:10.2519/jospt.2006.2126

Key Words: cervical spine, head, manual therapy, neck

Study Design: Semiexperimental study. Objective: To investigate the effect of an external wrist extension force on extensor muscle activity during hand gripping in patients with lateral epicondylalgia. Background: Lateral epicondylalgia or ‘‘tennis elbow’’ is a common, often disabling ailment affecting millions of people. An optimal treatment strategy remains to be identified. The use of an external wrist extension force may reduce the extensor muscle activity during gripping in these patients. Methods: Muscle activity of the extensor carpi radialis brevis (ECRB), extensor digitorum communis (EDC), and extensor carpi radialis longus (ECRL) was measured using surface EMG. Subjects gripped at an intensity of 10%, 20%, and 30% of the maximum voluntary contraction (MVC) force with and without the dynamic extensor brace and with and without an applied external wrist extension force of 1%, 2%, and 3% of MVC. Results: At all levels of MVC gripping, the EMG signal of the ECRB and EDC were significantly lower for gripping with than without brace. An extension force of 3% of the MVC force significantly reduced the EMG signal of all muscles in almost all measurement conditions. Conclusions: The results of this study indicate that the dynamic extensor brace as well as the external extension force significantly reduced the EMG signal of the wrist extensor muscles during gripping in patients with lateral epicondylalgia. Based on these results, the dynamic extensor brace could be a promising new intervention for lateral epicondylalgia.

J Orthop Sports Phys Ther. 2006;36(3):170-178. doi:10.2519/jospt.2006.2165

Key Words: electromyography, hand grip, isometric force, tennis elbow