Kathryn E. Roach

The Amputee Mobility Predictor: An instrument to assess determinants of the lower-limb amputee's ability to ambulate☆☆☆

OBJECTIVESnTo describe the development of the Amputee Mobility Predictor (AMP) instrument designed to measure ambulatory potential of lower-limb amputees with (AMPPRO) and without (AMPnoPRO) the use of a prosthesis, and to test its reliability and validity.nnnDESIGNnMeasurement study using known groups method and concurrence with existing measures.nnnSETTINGnAcademic medical center.nnnPARTICIPANTSnA convenience sample of 191 lower-limb amputee subjects who had completed prosthetic training, 24 in the reliability study (mean age +/- standard deviation, 68.3+/-17.9y, range, 28-99y) and 167 in the validity study (mean age, 54.8+/-18.6y; range, 18-100y).nnnINTERVENTIONSnNot applicable.nnnMAIN OUTCOME MEASURESnIntra- and interrater reliability; construct validity by known groups method; concurrent validity by comparisons with 6-minute walk test, Comorbidity Index, age, and time since amputation; predictive validity by comparison with 6-minute walk test after controlling for other factors.nnnRESULTSnInterrater reliability was.99 for subjects tested with and without their prosthesis; intrarater reliability was.96 and.97. Both the AMPnoPRO (P<.0001) and the AMPPRO scores (P<.0001) distinguished among the 4 Medicare functional classification levels. The AMP correlated strongly with 6-minute walk scores (AMPnoPRO r=.69, P<.0001; AMPPRO r=.82, P<.0001) and the amputee activity survey (AMPnoPRO r=.67, P<.0001; AMPPRO r=.77, P<.0001), and negatively correlated with age (AMPnoPRO r=-.69, P<.0001; AMPPRO r=.56, P<.0001) and comorbidity (AMPnoPRO r=-.43, P<.0001; AMPPRO r=.38, P<.0001).nnnCONCLUSIONnThe AMP with and without a prosthesis are reliable and valid measures for the assessment of functional ambulation in lower-limb amputee subjects.

Influence of a Locomotor Training Approach on Walking Speed and Distance in People With Chronic Spinal Cord Injury: A Randomized Clinical Trial

Background Impaired walking limits function after spinal cord injury (SCI), but training-related improvements are possible even in people with chronic motor incomplete SCI. Objective The objective of this study was to compare changes in walking speed and distance associated with 4 locomotor training approaches. Design This study was a single-blind, randomized clinical trial. Setting This study was conducted in a rehabilitation research laboratory. Participants Participants were people with minimal walking function due to chronic SCI. Intervention Participants (n=74) trained 5 days per week for 12 weeks with the following approaches: treadmill-based training with manual assistance (TM), treadmill-based training with stimulation (TS), overground training with stimulation (OG), and treadmill-based training with robotic assistance (LR). Measurements Overground walking speed and distance were the primary outcome measures. Results In participants who completed the training (n=64), there were overall effects for speed (effect size index [d]=0.33) and distance (d=0.35). For speed, there were no significant between-group differences; however, distance gains were greatest with OG. Effect sizes for speed and distance were largest with OG (d=0.43 and d=0.40, respectively). Effect sizes for speed were the same for TM and TS (d=0.28); there was no effect for LR. The effect size for distance was greater with TS (d=0.16) than with TM or LR, for which there was no effect. Ten participants who improved with training were retested at least 6 months after training; walking speed at this time was slower than that at the conclusion of training but remained faster than before training. Limitations It is unknown whether the training dosage and the emphasis on training speed were optimal. Robotic training that requires active participation would likely yield different results. Conclusions In people with chronic motor incomplete SCI, walking speed improved with both overground training and treadmill-based training; however, walking distance improved to a greater extent with overground training.

Effect of a Combined Walking and Conversation Intervention on Functional Mobility of Nursing Home Residents With Alzheimer Disease

Assisted walking and walking combined with conversation were compared to a conversation-only intervention in nursing home residents with Alzheimer disease. Sixty-five subjects randomly assigned to treatment group were tested at baseline and end of treatment. Subjects mean Mini-Mental State Examination score was 10.83; mean age was 87. Treatment was given for 30 minutes three times a week for 16 weeks. Subjects in the assisted walking group declined 20.9% in functional mobility; the conversation group declined 18.8%. The combined walking and conversation treatment group declined only 2.5%. These differences in outcome were significant and appear to have been affected by differences in treatment fidelity. Subjects in the conversation treatment group completed 90% of intended treatment compared with 75% in the combined group and only 57% in the assisted walking group. Failure to treat was due to subject refusal and physical illness. The conversation component of the combined walking and conversation treatment intervention appears to have improved compliance with the intervention, thereby improving treatment outcome. Results indicate that assisted walking with conversation can contribute to maintenance of functional mobility in institutionalized populations with Alzheimer disease. Staff assigned to this task should be prepared to use effective communication strategies to gain acceptance of the intervention.

Impacts of foot orthoses on pain and disability in rheumatoid arthritics

Rheumatoid arthritis (RA) frequently causes foot pain and swelling that affect ambulation. Pharmaceutical management of pain and disability is standard in clinical practice. The use of functional posted foot orthoses, as an adjunct to pharmaceutical treatment, is a promising treatment for managing foot pain and disability in RA. Its effectiveness, however, has not been rigorously evaluated. We performed a double-blind clinical trial using foot orthoses vs. placebo orthoses in the management of the rheumatoid arthritic foot, while subjects continued customary treatment. On the basis of findings of no effect on disability and pain measures, this study indicates no benefit of functional posted foot orthoses over placebos.

Can foot orthoses prevent hallux valgus deformity in rheumatoid arthritis? A randomized clinical trial.

Hallux valgus deformity is the most commonly observed forefoot deformity in patients with rheumatoid arthritis. This 5-year, double-blind, randomized clinical trial compared treatment orthoses with placebo orthoses for the prevention of hallux valgus deformity in the rheumatoid arthritic foot.One hundred and two subjects with active rheumatoid arthritis and with foot pain and minimal radiographic changes of the feet participated in the study. They were recruited from five arthritis clinics in the Chicago metropolitan area that are affiliated with or are teaching clinics of area medical schools. Patients were followed for 3 years.Eighty-one subjects completed the study. In a logistic regression analysis, the treatment group was 73% less likely to develop hallux valgus deformity compared with the control group (adjusted odds ratio 0.27, 95% confidence interval 0.078, 0.916 p = .04). These findings suggest that foot orthoses can prevent or slow the progression of hallux valgus deformity.

Validation of the Revised Physical Therapist Clinical Performance Instrument (PT CPI): Version 2006

Background Based on changes in core physical therapy documents and problems with the earlier version, the Physical Therapist Clinical Performance Instrument (PT CPI): Version 1997 was revised to create the PT CPI: Version 2006. Objective The purpose of this study was to validate the PT CPI: Version 2006 for use with physical therapist students as a measure of clinical performance. Design This was a combined cross-sectional and prospective study. Methods A convenience sample of physical therapist students from the United States and Canada participated in this study. The PT CPI: Version 2006 was used to collect CPI item–level data from the clinical instructor about student performance at midterm and final evaluation periods in the clinical internship. Midterm evaluation data were collected from 196 students, and final evaluation data were collected from 171 students. The students who participated in the study had a mean age of 24.8 years (SD=2.3, range=21–41). Sixty-seven percent of the participants were from programs in the United States, and 33% were from Canada. Results The PT CPI: Version 2006 demonstrated good internal consistency, and factor analysis with varimax rotation produced a 3-factor solution explaining 94% of the variance. Construct validity was supported by differences in CPI item scores between students on early compared with final clinical experiences. Validity also was supported by significant score changes from midterm to final evaluations for students on both early and final internships and by fair to moderate correlations between prior clinical experience and remaining course work. Limitations This study did not examine rater reliability. Conclusion The results support the PT CPI: Version 2006 as a valid measure of physical therapist student clinical performance.

Operant conditioning to increase ankle control or decrease reflex excitability improves reflex modulation and walking function in chronic spinal cord injury

Ankle clonus is common after spinal cord injury (SCI) and is attributed to loss of supraspinally mediated inhibition of soleus stretch reflexes and maladaptive reorganization of spinal reflex pathways. The maladaptive reorganization underlying ankle clonus is associated with other abnormalities, such as coactivation and reciprocal facilitation of tibialis anterior (TA) and soleus (SOL), which contribute to impaired walking ability in individuals with motor-incomplete SCI. Operant conditioning can increase muscle activation and decrease stretch reflexes in individuals with SCI. We compared two operant conditioning-based interventions in individuals with ankle clonus and impaired walking ability due to SCI. Training included either voluntary TA activation (TA↑) to enhance supraspinal drive or SOL H-reflex suppression (SOL↓) to modulate reflex pathways at the spinal cord level. We measured clonus duration, plantar flexor reflex threshold angle, timed toe tapping, dorsiflexion (DF) active range of motion, lower extremity motor scores (LEMS), walking foot clearance, speed and distance, SOL H-reflex amplitude modulation as an index of reciprocal inhibition, presynaptic inhibition, low-frequency depression, and SOL-to-TA clonus coactivation ratio. TA↑ decreased plantar flexor reflex threshold angle (-4.33°) and DF active range-of-motion angle (-4.32°) and increased LEMS of DF (+0.8 points), total LEMS of the training leg (+2.2 points), and nontraining leg (+0.8 points), and increased walking foot clearance (+ 4.8 mm) and distance (+12.09 m). SOL↓ decreased SOL-to-TA coactivation ratio (-0.21), increased nontraining leg LEMS (+1.8 points), walking speed (+0.02 m/s), and distance (+6.25 m). In sum, we found increased voluntary control associated with TA↑ outcomes and decreased reflex excitability associated with SOL↓ outcomes.

The Reliability of the Vestibular autorotation test (VAT) in patients with dizziness

Objective: To establish intrarater and interrater reliability of the Vestibular Autorotation Test (VAT) (Western Systems Research Inc., Pasadena, CA) in a clinical sample of individuals reporting dizziness. Study Design: Ninety-eight patients with reports of dizziness referred for vestibular function testing performed repeated trials of horizontal VAT. A subsample of 49 individuals repeated the test for a second rater. Results: Approximately 66% of subjects were unable to meet the performance criterion of six consecutive trials where data was displayed at frequencies ≥3.9 Hz with coherence values held constant trial to trial. There was a good level of intrarater reliability for gain independent of the effects of practice (intraclass correlation coefficient [ICC] = 0.78 [95% confidence interval [CI]: 0.69–0.87] to 0.95 [(95% CI: 0.93–0.97]). A significant difference in intrarater reliability was found when the first three trials were compared to the last three trials for phase (ICC ranged from 0.04 [95% CI: 0.00–0.31] to 0.96 [95% CI: 0.93–0.97]) and asymmetry (ICC ranged from 0.39 [95% CI: 0.17–0.56] to 0.73 [95% CI: 0.32–0.81]) particularly at frequencies ≥4.3 Hz. Interrater reliability was good to excellent across all variables at frequencies ≤3.9 Hz. Conclusions: Many patients had difficulty performing the VAT. The reliability estimates for phase and asymmetry, but not gain, were significantly affected by practice. Careful attention to patient preparation, instruction, and test monitoring including sufficient patient practice before data collection are likely to be critical factors to ensure quality data.

Spanish version of SPADI (shoulder pain and disability index) in musculoskeletal shoulder pain: a new 10-items version after confirmatory factor analysis

BackgroundThe Shoulder Pain and Disability Index (SPADI) is a tool designed to evaluate the impact of shoulder pathology. The aim of this study was to cross culturally adapt a Spanish version of the SPADI for Spanish population with a musculoskeletal shoulder pain, and to determine the psychometric properties of this instrument using confirmatory factor analysis (CFA).MethodsCross-cultural adaptation was performed according to the international guidelines. To assess factor structure, a confirmatory factor analysis was done. Internal consistency was measured using Cronbach’s alpha. Item-total and inter-item correlations were assessed. Pearson and Spearman correlations were calculated to assess the convergent validity between SPADI and quick-DASH.ResultsA new Spanish version of SPADI was achieved. The original SPADI factor structure was tested by CFA, obtaining a poor fit: relative chi-square (χ2/df) 3.16, CFI 0.89, NFI 0.92, and RMSEA 0.10 (90xa0% CI 0.08 to 0.12). An additional model was tested, after deleting items which have had a poor adjustment in the model (1, 11, and 12), obtaining the best fit: relative chi-square (χ2/df) of 1.94, CFI 0.98, NFI 0.95, GFI 0,95, and RMSEA 0.06 (90xa0% CI 0.04 to 0.09). The analysis confirmed the bidimensional structure (pain and disability subscales). A correlation Spearman’s Rho coefficient of 0.752 (pu2009<u20090.0001) and a Cronbach’s alpha of 0.90 were obtained.ConclusionsThis study validated a new 10-items version of SPADI for Spanish population with musculoskeletal shoulder pain providing a patient reported outcome measure that could be used in both clinical practice and research.

Program-Level Factors Influencing Positive Graduate Outcomes of Physical Therapy Residency Programs

BackgroundnPhysical therapist clinical residency programs vary widely in administrative structure, instructional characteristics, and program design. The impact of program-level factors on resident outcomes such as graduation and board certification is unknown.nnnObjectivenThe objective of this study was to examine the influence of program-level factors on participant outcomes of physical therapist residency programs.nnnDesignnThis was a retrospective cohort study using data from accredited programs from 2010 to 2013.nnnMethodsnData were collected on program characteristics such as administrative structure, size, salary, tuition, full- or part-time options, didactic format, and clinical-site structure. The odds ratios were calculated to examine the impact of program characteristics on graduation, board certification, and passing the exam. A logistic regression analysis to determine the combined contribution of these characteristics on the 3 outcomes was performed.nnnResultsnData from 183 residency programs and 1589 residents were analyzed. Participants attending programs that were single site or multifacility, provided live didactic instruction, did not charge tuition, and paid residents ≥ 70% full-time equivalent salary were 9.8 times more likely to graduate, 5.1 times more likely to become board certified, and 3.2 times more likely to pass the specialty board examination.nnnLimitationsnThis study did not examine the impact of program location, resident attributes, or resident exposure to patient diagnostic volume and variety.nnnConclusionsnThis study has identified some program-level factors that appear to influence the odds of graduating, becoming board-certified, and passing the specialty board examination. This information could inform existing and developing residency programs, as well as applicants, on program-level factors that might influence participant outcomes.