Physical therapy musculoskeletal imaging authority: A survey of the World Confederation for Physical Therapy Nations.

OBJECTIVES: Medical evidence largely supports PTs in expanded roles, however, healthcare policy within the United States (USA) typically restricts PTs from ordering musculoskeletal (MSK) imaging. It is unknown how MSK imaging policy in the USA compares to other World Confederation for Physical Therapy (WCPT) member nations. The primary objective of our study was to investigate the authority of PTs to order MSK imaging. A secondary objective was to identify factors associated with the authority for PTs to order MSK imaging. METHODS: 111 WCPT member nations were surveyed over a 2-month period on the authority of PTs ordering MSK imaging within their nation. A secondary analysis utilizing a step-wise binary regression compared member nation demographic statistics to MSK imaging authority. RESULTS: 81 member nations responded to the survey. 31 (38.3%) of member nations reported having some level of PT MSK imaging authority while 50 (61.7%) did not. Member nations with lower per capita healthcare costs were significantly more likely to allow PTs to order MSK imaging (p = 0.02). Those with direct access authority were 7.4 times more likely to authorize PTs to order MSK imaging (p < 0.01). Entry-level clinical degree and years of entry-level collegiate credit were not associated with imaging authority. CONCLUSION: This is the first study to report MSK imaging policy within the WCPT member nations. While many nations within the WCPT allow PTs to order MSK imaging, the majority of nations still restrict PTs from such practice. Lower per capita healthcare costs and direct access authority were significant predictors of MSK imaging authority, however, causation cannot be established within the confines of this study. Future studies should consider issues such as restrictive policy origin (i.e. governmental vs. institutional), insurance reimbursement (i.e. private vs. public sector policy), and limitations on imaging modality.

Feasibility of Automated Mobility Assessment of Older Adults via an Instrumented Cane.

This study explored the feasibility of automated characterization of functional mobility via an Instrumented Cane System (ICS) within an older adult sample of cane users. An off-the-shelf offset cane was instrumented with inertial, force, and ultrasound sensors for noninvasive data collection. Eighteen patients from a neurological out-patient rehabilitation clinic and nine independently mobile controls participated in standard clinical evaluations of mobility using the ICS while under the care of an attending physical therapist. Feasibility of the ICS was gauged through two studies. The first demonstrated the capability of the ICS to reliably collect meaningful usage metrics, and the second provided preliminary support for the discriminability of high and low falls risk from system-reported metrics. Specifically, the cane significantly differentiated patients and controls (p < 0.05), and a measure of the variation in rotational velocity was associated with total scores on the Functional Gait Assessment (partial r = 0.61, p < 0.01). These findings may ultimately serve to complement and even extend current clinical assessment practices.

Examination of the Validity of a Clinical Prediction Rule to Identify Patients With Shoulder Pain Likely to Benefit From Cervicothoracic Manipulation.

Study Design Secondary analysis of a randomized controlled trial. Background Prognostic variables identifying patients with shoulder pain who are likely to respond to cervicothoracic manipulation have been reported; however, they have yet to be validated. Objective To examine the validity of previously reported prognostic variables in predicting which patients with shoulder pain will respond to cervicothoracic manipulation. Methods Participants (n = 140) with a report of shoulder pain were randomly assigned to receive either 2 sessions of range-of-motion exercises plus 6 sessions of stretching and strengthening exercises (exercise group), or 2 sessions of cervicothoracic manipulation and range-of-motion exercises followed by 6 sessions of stretching and strengthening exercise (manipulative-therapy-plus-exercise group). Outcomes of disability (Shoulder Pain and Disability Index, shortened version of the Disabilities of the Arm, Shoulder and Hand Questionnaire) and pain (numeric pain-rating scale) were collected at baseline, 1 week, 4 weeks, and 6 months. Time, treatment group, status of predictor variables, and 2-way and 3-way interactions were analyzed using linear mixed models with repeated measures. Results There were no significant 3-way interactions for either disability (P = .27) or pain scores (P = .70) for time, group, and predictor status for any of the predictor variables. Conclusion The results of the current study did not validate the previously identified prognostic variables; therefore, we cannot support using these in clinical practice. Further updating of the existing prediction rule may be warranted and could potentially result in new prognostic variables and improved generalizability. Limitations of the study were a mean duration of symptoms of greater than 2 years and a loss to follow-up of 19% at 6 months. Level of Evidence Prognosis, level 1b. Trial prospectively registered March 30, 2012 at www.clinicaltrials.gov (NCT01571674). J Orthop Sports Phys Ther 2017;47(4):252-260. Epub 3 Mar 2017. doi:10.2519/jospt.2017.7100.

Translational manipulation under anesthesia for patients with frozen shoulder: a case series study with five-year health care utilization and post-manipulative arthroscopic findings.

STUDY DESIGN: Case series study. OBJECTIVES: Although there have been no reported complications from translational manipulation under anesthesia (tMUA) for individuals with adhesive capsulitis (AC) there are no cases reporting surgical findings post tMUA. Also, there are no studies evaluating health care utilization following tMUA. The purpose of this study was to: (1) report clinical outcomes following tMUA, (2) describe relevant health care costs and utilization following tMUA, and (3) summarize findings from two cases receiving joint arthroscopy following tMUA. METHODS: Fourteen Individuals with AC underwent tMUA. Range of motion (ROM) and Shoulder Pain and Disability Index (SPADI) values were collected at baseline and six weeks follow-up. Shoulder-related health care cost and utilization were analyzed for a five-year period following tMUA. Two additional patients with AC underwent tMUA followed by arthroscopic assessment for evidence of iatrogenic injury. RESULTS: Thirteen patients completed the six-week follow-up. Mean change scores for ROM and SPADI values were flexion; +38.5°, abduction; +71.1°, external rotation (shoulder abducted); +49.8°, internal rotation (shoulder abducted); +26.6°, SPADI scores; +44.4. 13 patient records were analyzed for health care utilization. Ten of the 13 patients utilized no additional shoulder-related health care. Surgical evaluation revealed no evidence of iatrogenic injury. DISCUSSION: Clinical outcomes were similar to previous studies. Utilization data indicated that for the majority of patients, little shoulder-related health care was utilized. Surgical evaluation provided further evidence that tMUA performed by a physical therapist is safe. Future research will be required to establish a causal relationship between tMUA and the results observed in this study. LEVEL OF EVIDENCE: Therapy, Level 4.

Association of Physical Inactivity, Weight, Smoking, and Prior Injury on Physical Performance in a Military Setting.

CONTEXT: Although inactivity, being overweight, smoking, and a history of injury are identified as risk factors for poor health and injury, few authors have examined their association on physical performance. Young adults may be more likely to adopt healthier lifestyles if they understand the effect of health behaviors on performance. OBJECTIVE: To determine the association of being overweight, smoking, inactivity, and a history of injury with physical performance. DESIGN: Cross-sectional study. SETTING: Military population. PATIENTS OR OTHER PARTICIPANTS: Active-duty service members (N = 1466; 1380 men, 86 women; age = 24.7 ± 5.0 years; body mass index = 26.7 ± 3.4 kg/m2). MAIN OUTCOME MEASURE(S): Participants performed 8 measures (the triple-crossover hop for distance, the 6-m timed-hop test, the Functional Movement Screen, the Lower Quarter Y-Balance Test, the Upper Quarter Y-Balance Test, and the 3-event Army Physical Fitness Test) for evaluation of endurance, strength, muscular endurance, power, agility, balance, and motor control. Participants were categorized based on the number of health risk factors present. Using an analysis of covariance, we assessed the relationship between risk factors and physical performance with age and sex as covariates. RESULTS: Compared with those who had no risk factors (27.9% of men, 34.9% of women), physical performance was worse in those who had 1, 2, or 3 to 4 risk factors present by 4.3%, 6.7%, and 10.3%, respectively. Decrements in performance for those with 3 to 4 risk factors ranged from 3.3% to 14.4%. CONCLUSIONS: An unhealthy lifestyle habit or a history of injury was negatively associated with physical performance. Physical performance decrements were associated with the number of risk factors present. Understanding how risk factors contribute to decreased physical performance may enable clinicians to improve compliance with injury-prevention programs in occupational settings in which a young and relatively healthy workforce may be more concerned about performance than health.

Application of Athletic Movement Tests that Predict Injury Risk in a Military Population: Development of Normative Data.

Performance on movement tests helps to predict injury risk in a variety of physically active populations. Understanding baseline measures for normal is an important first step. OBJECTIVES: Determine differences in physical performance assessments and describe normative values for these tests based on military unit type. METHODS: Assessment of power, balance, mobility, motor control, and performance on the Army Physical Fitness Test were assessed in a cohort of 1,466 soldiers. Analysis of variance was performed to compare the results based on military unit type (Rangers, Combat, Combat Service, and Combat Service Support) and analysis of covariance was performed to determine the influence of age and gender. RESULTS: Rangers performed the best on all performance and fitness measures (p < 0.05). Combat soldiers performed better than Combat Service and Service Support soldiers on several physical performance tests and the Army Physical Fitness Test (p < 0.05). Performance in Combat Service and Service Support soldiers was equivalent on most measures (p < 0.05). CONCLUSIONS: Functional performance and level of fitness varied significantly by military unit type. Understanding these differences will provide a foundation for future injury prediction and prevention strategies.

Cervicothoracic Manual Therapy Plus Exercise Therapy Versus Exercise Therapy Alone in the Management of Individuals With Shoulder Pain: A Multicenter Randomized Controlled Trial.

Study Design Multicenter randomized controlled trial. Background Cervicothoracic manual therapy has been shown to improve pain and disability in individuals with shoulder pain, but the incremental effects of manual therapy in addition to exercise therapy have not been investigated in a randomized controlled trial. Objectives To compare the effects of cervicothoracic manual therapy and exercise therapy to those of exercise therapy alone in individuals with shoulder pain. Methods Individuals (n = 140) with shoulder pain were randomly assigned to receive 2 sessions of cervicothoracic range-of-motion exercises plus 6 sessions of exercise therapy, or 2 sessions of high-dose cervicothoracic manual therapy and range-of-motion exercises plus 6 sessions of exercise therapy (manual therapy plus exercise). Pain and disability were assessed at baseline, 1 week, 4 weeks, and 6 months. The primary aim (treatment group by time) was examined using linear mixed-model analyses and the repeated measure of time for the Shoulder Pain and Disability Index (SPADI), the numeric pain-rating scale, and the shortened version of the Disabilities of the Arm, Shoulder and Hand questionnaire (QuickDASH). Patient-perceived success was assessed and analyzed using the global rating of change (GROC) and the Patient Acceptable Symptom State (PASS), using chi-square tests of independence. Results There were no significant 2-way interactions of group by time or main effects by group for pain or disability. Both groups improved significantly on the SPADI, numeric pain-rating scale, and QuickDASH. Secondary outcomes of success on the GROC and PASS significantly favored the manual therapy-plus-exercise group at 4 weeks (P = .03 and P<.01, respectively) and on the GROC at 6 months (P = .04). Conclusion Adding 2 sessions of high-dose cervicothoracic manual therapy to an exercise program did not improve pain or disability in patients with shoulder pain, but did improve patient-perceived success at 4 weeks and 6 months and acceptability of symptoms at 4 weeks. More research is needed on the use of cervicothoracic manual therapy for treating shoulder pain. Level of Evidence Therapy, level 1b. Prospectively registered March 30, 2012 at www.ClinicalTrials.gov (NCT01571674). J Orthop Sports Phys Ther 2016;46(8):617-628. doi:10.2519/jospt.2016.6319.

Effectiveness of trigger point dry needling for multiple body regions: a systematic review.

BACKGROUND: Trigger point dry needling (TDN) is commonly used to treat musculoskeletal pain related to myofascial trigger points (MTrPs). To date, no systematic review of high-quality randomised controlled trials (RCTs) investigating TDN to multiple body regions exists. PURPOSE: The aim of this review is to determine the effectiveness of TDN based on high-quality RCTs for all body regions. METHODS: To ensure thorough reporting, Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were followed as the methodological basis for this systematic review. PubMed, Physiotherapy Evidence Database (PEDro), Cinahl, Cochrane and reference lists were searched for the years 2000-2014 and the terms 'TDN', 'dry needling NOT trigger point', 'functional dry needling' and 'intramuscular manual therapy'. INCLUSION CRITERIA: RCTs with PEDro scores 6-10 investigating TDN. EXCLUSION CRITERIA: duplicates, non-human participants, non-English language, exclusive focus on acupuncture or medicinal injections. Three investigators searched databases, applied criteria, read and assigned PEDro scores to every RCT. Nineteen studies met the criteria. As compared to either baseline or control groups, significant differences were found for pain (14 studies), range of motion (ROM) (five studies) and at least one item on function and quality of life measures (six studies). LIMITATIONS: This review was limited by inclusion criteria, timeframe, language and databases searched. CONCLUSION: The majority of high-quality studies included in this review show measured benefit from TDN for MTrPs in multiple body areas, suggesting broad applicability of TDN treatment for multiple muscle groups. Further high-quality research is warranted to standardise TDN methods to determine clinical applicability.

The immediate effects of thoracic transverse mobilization in patients with the primary complaint of mechanical neck pain: a pilot study.

OBJECTIVE: Posterior-to-anterior (PA) vertebral mobilization to the thoracic spine has been studied as an intervention for neck pain. Our purpose was to explore effects of a different mobilization technique, transverse vertebral pressure, on cervical range of motion (ROM) and pain when applied to the thoracic spine among participants with neck pain. METHODS: A single-blinded quasi-experimental study with a one-group pretest-posttest design. A transverse group consisted of 21 participants whose neck pain increased with active movements. A non-intervention group of 20 asymptomatic participants was included simply to ensure rater blinding. The treatment group received Grades IV to IV+ transverse mobilizations at T1 through T4 bilaterally. Measurements taken immediately after intervention included pre/post cervical ROM, distant pressure pain threshold (PPT), and a numerical pain rating scale (NPRS). Analysis utilized t-tests and ordinal counterparts. RESULTS: The transverse group demonstrated significant gains in extension and bilateral rotation (P≤0.005) but not flexion or side-bend. A total of 57% of mobilized participants reported clinically meaningful decreased pain (P<0.001). Seven participants exceeded the PPT MDC95 of 0.36 kg/cm(2). The non-intervention group had no significant changes in ROM or NPRS scores. DISCUSSION: After 8 minutes of transverse mobilization to the upper thoracic spine, significant gains in cervical extension and bilateral rotation, and decreased pain scores were found. There were no adverse effects. Unlike other mobilization studies, PPT changes at a remote site were statistically but not clinically meaningful. Findings suggest that transverse mobilization would be a productive topic for controlled clinical trials.

One-year outcome of subacromial corticosteroid injection compared with manual physical therapy for the management of the unilateral shoulder impingement syndrome: a pragmatic randomized trial.

BACKGROUND: Corticosteroid injections (CSIs) and physical therapy are used to treat patients with the shoulder impingement syndrome (SIS) but have never been directly compared. OBJECTIVE: To compare the effectiveness of 2 common nonsurgical treatments for SIS. DESIGN: Randomized, single-blind, comparative-effectiveness, parallel-group trial. (ClinicalTrials.gov: NCT01190891). SETTING: Military hospital-based outpatient clinic in the United States. PATIENTS: 104 patients aged 18 to 65 years with unilateral SIS between June 2010 and March 2012. INTERVENTION: Random assignment into 2 groups: 40-mg triamcinolone acetonide subacromial CSI versus 6 sessions of manual physical therapy. MEASUREMENTS: The primary outcome was change in Shoulder Pain and Disability Index scores at 1 year. Secondary outcomes included the Global Rating of Change scores, the Numeric Pain Rating Scale scores, and 1-year health care use. RESULTS: Both groups demonstrated approximately 50% improvement in Shoulder Pain and Disability Index scores maintained through 1 year; however, the mean difference between groups was not significant (1.5% [95% CI, -6.3% to 9.4%]). Both groups showed improvements in Global Rating of Change scale and pain rating scores, but between-group differences in scores for the Global Rating of Change scale (0 [CI, -2 to 1]) and pain rating (0.4 [CI, -0.5 to 1.2]) were not significant. During the 1-year follow-up, patients receiving CSI had more SIS-related visits to their primary care provider (60% vs. 37%) and required additional steroid injections (38% vs. 20%), and 19% needed physical therapy. Transient pain from the CSI was the only adverse event reported. LIMITATION: The study occurred at 1 center with patients referred to physical therapy. CONCLUSION: Both groups experienced significant improvement. The manual physical therapy group used less 1-year SIS-related health care resources than the CSI group. PRIMARY FUNDING SOURCE: Cardon Rehabilitation Products through the American Academy of Orthopaedic Manual Physical Therapists.

Physical therapist practice and the role of diagnostic imaging.

SYNOPSIS: For healthcare providers involved in the management of patients with musculoskeletal disorders, the ability to order diagnostic imaging is a beneficial adjunct to screening for medical referral and differential diagnosis. A trial of conservative treatment, such as physical therapy, is often recommended prior to the use of imaging in many treatment guidelines for the management of musculoskeletal conditions. In the United States, physical therapists are becoming more autonomous and can practice some degree of direct access in 48 states and Washington, DC. Referral for imaging privileges could increase the effectiveness and efficiency of healthcare delivery, particularly in combination with direct access management. This clinical commentary proposes that, given the American Physical Therapy Association's goal to have physical therapists as primary care musculoskeletal specialists of choice, it would be beneficial for physical therapists to have imaging privileges in their practice. The purpose of this commentary is 3-fold: (1) to make a case for the use of imaging privileges by physical therapists, using a historical perspective; (2) to discuss the barriers preventing physical therapists from having this privilege; and (3) to offer suggestions on strategies and guidelines to facilitate the appropriate inclusion of referral for imaging privileges in physical therapist practice. J Orthop Sports Phys Ther 2011;41(11):829-837. doi:10.2519/jospt.2011.3556.

A manual physical therapy approach versus subacromial corticosteroid injection for treatment of shoulder impingement syndrome: a protocol for a randomised clinical trial.

INTRODUCTION: Corticosteroid injections (CSI) are a recommended and often-used first-line intervention for shoulder impingement syndrome (SIS) in primary care and orthopaedic settings. Manual physical therapy (MPT) offers a non-invasive approach with negligible risk for managing SIS. There is limited evidence to suggest significant long-term improvements in pain, strength and disability with the use of MPT, and there are conflicting reports from systematic reviews that question the long-term efficacy of CSI. Specifically, the primary objective is to compare the effect of CSI and MPT on pain and disability in subjects with SIS at 12 months. DESIGN: This pragmatic randomised clinical trial will be a mixed-model 2×5 factorial design. The independent variables are treatment (MPT and CSI) and time with five levels from baseline to 1 year. The primary dependent variable is the Shoulder Pain and Disability Index, and the secondary outcome measures are the Global Rating of Change and the Numeric Pain Rating Scale. For each ANOVA, the hypothesis of interest will be the two-way group-by-time interaction. METHODS AND ANALYSIS: The authors plan to recruit 104 participants meeting established impingement criteria. Following examination and enrollment, eligible participants will be randomly allocated to receive a pragmatic approach of either CSI or MPT. The MPT intervention will consist of six sessions, and the CSI intervention will consist of one to three sessions. All subjects will continue to receive usual care. Subjects will be followed for 12 months. DISSEMINATION AND ETHICS: The protocol was approved by the Madigan Army Medical Center Institutional Review Board. The results may have an impact on clinical practice guidelines. This study was funded in part by the Orthopaedic Physical Therapy Products Grant through the American Academy of Orthopaedic Manual Physical Therapists. Trial Registration http://clinicaltrials.gov/ NCT01190891.

The short-term effects of treating plantar fasciitis with a temporary custom foot orthosis and stretching.

STUDY DESIGN: Prospective single-group cohort study. OBJECTIVES: To identify the effectiveness of a temporary custom foot orthosis (TCFO), followed by a stretching program, for the treatment of plantar fasciitis (PF). BACKGROUND: PF, a common cause of heel pain, often leads to disability. Optimal treatment for this often challenging clinical condition is still unknown. METHODS: Fifteen individuals with PF were recruited from the general public. All participants received a TCFO and were instructed to wear it for 2 weeks while weight bearing. Following the initial 2 weeks, participants were weaned off of the TCFO and instructed to begin a daily stretching program. Follow-up appointments occurred at 2, 4, and 12 weeks. The primary outcome measures included first-step heel pain via numeric pain rating scale (NPRS), the Foot and Ankle Ability Measure activities of daily living subscale (FAAM-A), and the Foot and Ankle Ability Measure sports subscale (FAAM-S). Secondary outcome included the global rating of change (GRC) score. RESULTS: Individuals with a primary complaint of plantar foot pain entered and completed this study. Repeated-measures ANOVAs for the NPRS, FAAM-A, and FAAM-S showed statistically significant changes (P<.001). Post hoc analysis using paired t tests demonstrated statistically and clinically significant change at all follow-up times, compared to the initial intervention (P<.001). Mean GRC scores at 2, 4, and 12 weeks were 4.4, 4.5, and 4.2, respectively. CONCLUSION: In treating PF, a TCFO used for 2 weeks, followed by a stretching program, provided preliminary evidence that first-step heel pain and foot and ankle function improve in the short term and up to 12 weeks. LEVEL OF EVIDENCE: Therapy, level 2b.

Effectiveness of manual physical therapy in the treatment of cervical radiculopathy: a systematic review.

STUDY DESIGN: Systematic review of randomized clinical trials. OBJECTIVE: Review of current literature regarding the effectiveness of manual therapy in the treatment of cervical radiculopathy. BACKGROUND: Cervical radiculopathy (CR) is a clinical condition frequently encountered in the physical therapy clinic. Cervical radiculopathy is a result of space occupying lesions in the cervical spine: either cervical disc herniations, spondylosis, or osteophytosis. These affect the pain generators of bony and ligamentous tissues, producing radicular symptoms (i.e. pain, numbness, weakness, paresthesia) observed in the upper extremity of patients with cervical nerve root pathology. Cervical radiculopathy has a reported annual incidence of 83·2 per 100 000 and an increased prevalence in the fifth decade of life among the general population. RESULTS: Medline and CINAHL via EBSCO, Cochrane Library, and Google Scholar were used to retrieve the randomized clinical trial studies for this review between the years of 1995 and February of 2011. Four studies met inclusion criteria and were considered to be high quality (PEDro scores of ⩾5). Manual therapy techniques included muscle energy techniques, non-thrust/thrust manipulation/mobilization of the cervical and/or thoracic spine, soft-tissue mobilization, and neural mobilization. In each study, manual therapy was either a stand-alone intervention or part of a multimodal approach which included therapeutic exercise and often some form of cervical traction. Although no clear cause and effect relationship can be established between improvement in radicular symptoms and manual therapy, results are generally promising. CONCLUSION: Although a definitive treatment progression for treating CR has not been developed a general consensus exists within the literature that using manual therapy techniques in conjunction with therapeutic exercise is effective in regard to increasing function, as well as AROM, while decreasing levels of pain and disability. High quality RCTs featuring control groups are necessary to establish clear and effective protocols in the treatment of CR.

The addition of cervical thrust manipulations to a manual physical therapy approach in patients treated for mechanical neck pain: a secondary analysis.

STUDY DESIGN: Secondary analysis of a randomized clinical trial (RCT). OBJECTIVES: To perform a secondary analysis on the treatment arm of a larger RCT to determine differences in treatment outcomes, adverse reactions, and effect sizes between patients who received cervical thrust manipulation and those who received only nonthrust manipulation as part of an impairment-based, multimodal treatment program of manual physical therapy (MPT) and exercise for patients with mechanical neck pain. BACKGROUND: A treatment regimen of MPT and exercise has been effective in patients with mechanical neck pain. Limited research has compared the effectiveness of cervical thrust manipulations and nonthrust mobilizations for this patient population, and no studies have investigated the added benefit of cervical thrust manipulations as part of an overall MPT treatment plan. METHODS: Treatment outcomes from 47 patients in the treatment arm of a larger RCT, with a primary complaint of mechanical neck pain, were analyzed. Twenty-three patients (49%) received cervical thrust manipulations as part of their MPT treatment, and 24 patients (51%) received only cervical nonthrust mobilizations. All patients received up to 6 clinic sessions, twice weekly for 3 weeks, and a home exercise program. Primary outcome measures were the Neck Disability Index (NDI), 2 visual analog scales for cervical and upper extremity pain, and a 15-point global rating of change scale. Blinded outcome measurements were collected at baseline and at 3-, 6- and 52-week follow-ups. RESULTS: Consistent with the larger RCT, both subgroups in this secondary analysis demonstrated improvement in short- and long-term pain and disability scores. Low statistical power (beta< or =.28) and the resultant small effect size indices (-0.21 to 0.17) preclude the identification of any between-group differences. No serious adverse reactions were reported by patients in either subgroup. CONCLUSIONS: Clinically meaningful and statistically significant improvements in both subgroups of patients over time suggest that cervical thrust manipulation, as part of the MPT treatment plan, did not influence the results of the treatment arm of the larger RCT from which this study was drawn. Although no between-group differences can be identified, the small observed effect sizes in this study may benefit future studies with sample size estimation for larger RCTs and indicate the need to incorporate clinical prediction rule criteria as a means to improve statistical power. LEVEL OF EVIDENCE: Therapy, level 4.

Responsiveness of the Neck Disability Index in patients with mechanical neck disorders.

PURPOSE: Report the test-retest reliability, construct validity, minimum clinically important difference (MCID), and minimal detectable change (MDC) for the Neck Disability Index (NDI). STUDY DESIGN/SETTING: Cohort study of patients presenting to outpatient physical therapy clinics. PATIENT SAMPLE: Ninety-one subjects with a primary complaint of neck pain, with or without concomitant upper extremity (UE) symptoms, who were participants in a randomized clinical trial. OUTCOME MEASURES: NDI and the 15-point Global Rating of Change (GRC) self-report measures. METHODS: All subjects completed the NDI at baseline and at a 3-week follow-up. Additionally, subjects completed the GRC scale, which was used to dichotomize patients into improved or stable groups. Changes in the NDI were used to assess test-retest reliability, construct validity, MCID, and MDC. RESULTS: Test-retest reliability was moderate for the NDI (intraclass correlation coefficient, 0.64; 95% confidence interval, 0.19-0.84). For the NDI, the MCID was 7.5 points and the MDC was 10.2 points. CONCLUSIONS: The NDI appears to demonstrate adequate responsiveness based on statistical reference criteria when used in a sample that approximates the high percentage of patients with neck pain and concomitant UE referred symptoms. Because the MCID is within the bounds of measurement error, a 10-point change (the MDC) should be used as the MCID.