Developmental Trajectories and Reference Percentiles for the 6-Minute Walk Test for Children With Cerebral Palsy

Feasibility study on a longer side-alternating vibration therapy protocol (15 min per session) in children and adolescents with mild cerebral palsy

Objective

Previous studies on side-alternating vibration therapy (sVT) have usually used a 9 min intervention protocol. We performed a feasibility study aimed at assessing the safety, acceptability, and potential effectiveness of a longer sVT protocol (15 min per session) in children and adolescents with cerebral palsy (CP).

Methods

Fifteen participants aged 5.2-17.4 years (median = 12.4 years) with CP GMFCS level II underwent 20 weeks of sVT consisting of 15 min sessions 4 days/week. Participants were assessed at baseline and after the intervention period, including mobility (six-minute walk-test; 6MWT), body composition (whole-body dual-energy x-ray absorptiometry scans), and muscle function (force plate).

Results

Adherence level to the 15 min VT protocol was 83% on average. There were no adverse events reported. After 20 weeks, there was some evidence for an increase in the walking distance covered in 6MWT (+43 m; p = 0.0018) and spine bone mineral density (+0.032 g/cm2; p = 0.012) compared to baseline.

Conclusions

The 15 min sVT protocol is feasible and well tolerated. The results also suggest potential benefits of this protocol to mobility and bone health. Randomized controlled trials are needed to reliably ascertain the potential effectiveness of a longer sVT protocol on physical function and body composition in young people with CP.

Comparison of the six-minute walk test performed over a 15 and 30 m course by children with cerebral palsy

BACKGROUND

The aim of this study was to compare performance on the six-minute walk test (6MWT) performed over 15 m and 30 m courses by children and youths with cerebral palsy (CP).

METHODS

Children and youths with CP at Gross Motor Function Classification System levels I-IV performed the 6MWT in a straight 15 m-long corridor (first trial) and 30 m-long corridor (second trial). The intraclass correlation coefficient (ICC) and Bland-Altman plots were used to evaluate the agreement between the 6MWT results for the two corridor lengths.

RESULTS

We included 82 children and youths with CP (36 girls, 46 boys), with a mean age of 11.7 years (SD 4.2, range 5-22 years). There was high agreement between the results of the two 6MWTs: ICC 0.93 (95% confidence interval 0.76-0.97). The total walking distance was longer for the 30 m course (median 399 m, range 44-687 m) than the 15 m course (median 357 m, range 24-583 m).

CONCLUSIONS

We observed good agreement for the performance of the 6MWT in the 15 m and 30 m courses, although the total walking distance was greater for the 30 m course. We recommend that the same distance is used when evaluating changes in walking ability for an individual child. Both distances are appropriate when measuring endurance in children and youths with CP.

Desenvolvimento de crianças, adolescentes e jovens adultos com Paralisia Cerebral de acordo com a CIF? Uma revisão do escopo

Estudos sobre o desenvolvimento de indivíduos com PC ajudam terapeutas e pais a planejarem abordagens de tratamento e prognóstico futuro. Os principais desfechos investigados em indivíduos com PC foram atividade e estruturas e funções corporais. Pouco tem sido explorado em desfechos de participação e de fatores contextuais ao longo do tempo.

Development of children, adolescents, and young adults with cerebral palsy according to the ICF: A scoping review

AIM

To identify and provide a descriptive overview of the development of children, adolescents, and young adults with cerebral palsy (CP) in longitudinal studies; and map areas of focus according to the components of the World Health Organization's International Classification of Functioning, Disability, and Health (ICF).

METHOD

Longitudinal studies of the development of children, adolescents, and/or young adults with CP were included in this scoping review. A search for eligible studies was conducted in the databases MEDLINE, PubMed, LILACS, EMBASE, Cochrane, CINAHL, and Scopus, and was restricted to the years 2002 to 2022. All outcome measures of the studies were classified into ICF components.

RESULTS

In the 56 studies included, there were 19 438 participants, involving mainly children, followed by adolescents, and lastly young adults. All components of the ICF were investigated and many studies reported outcomes in more than one component. Activity was the most investigated (67.9%; n = 38 studies), followed by body functions and structures (42.9%; n = 24 studies). Participation (14.2%; n = 8 studies) and environmental factors (3.6%; n = 2 studies) were the least studied. None of the studies investigated personal factors as an outcome.

INTERPRETATION

This scoping review provides an overview of studies on the development of children, adolescents, and young adults with CP, using the ICF framework, identifying current areas of focus and gaps in the research. Future studies should target participation, contextual factors, and the transition into adulthood.

Understanding Acceptability, Barriers, and Facilitators to Clinical Implementation of the on Track Developmental Monitoring System for Children with Cerebral Palsy: A Qualitative Study

AIMS

On Track Developmental Monitoring System (DMS) is a novel series of tools to assist in shared-decision making, guide rehabilitation intervention based on functional ability levels, and promote episodic care service models. Further understanding of the acceptability, feasibility, and appropriateness of On Track DMS in clinical settings is critical. The purpose of this study was to understand clinician perspectives of the acceptability of On Track DMS and to identify potential implementation barriers and facilitators within pediatric physical therapist practice.

METHODS

Three, day-long training workshops were conducted with 32 pediatric physical therapists across the US. Focus groups with 21 workshop participants were conducted following training. Results were audio recorded, transcribed verbatim, and coded into themes.

RESULTS

Three themes emerged from the data: (1) Valuing the On Track Approach to Intervention; (2) Setting-Specific Needs and Challenges to Implementation; and (3) Training Material/Tool Strengths and Limitations.

CONCLUSIONS

On Track DMS appears to have initial value and acceptability for pediatric physical therapists across practice settings. Perceived benefits include facilitation of data-driven practice and therapist/family collaboration to improve health outcomes for children with CP. Using this data to understand and assess barriers and facilitators to knowledge use are first steps in successfully implementing On Track DMS.

Ankle Exoskeleton Assistance Increases Six-Minute Walk Test Performance in Cerebral Palsy

OBJECTIVE

To determine the effects of providing battery-powered ankle dorsiflexor and plantar flexor exoskeleton assistance on six-minute walk test performance and efficiency in children and young adults with cerebral palsy by comparing distance walked under exoskeleton assisted (Assisted) and no device (Shod) walking conditions, and explore the acclimation rate to maximal walking with ankle exoskeleton assistance.

RESULTS

Six-minute walk test performance significantly improved under the final Assisted condition test compared to the Shod condition (42 ± 27 m, p = 0.02), surpassing the minimum clinically important difference range for children and young adults with CP. There was no difference in walking efficiency (-0.06 ± 0.1, p = 0.3). Participants had an average acclimation rate of 19.6 m per session.

CONCLUSIONS

Powered ankle assistance can significantly improve six-minute walk test performance in individuals with mild-to-moderate gait impairment from CP, supporting the use of this intervention to improve functional mobility and walking capacity in this patient population.

Neuromuscular Electrical Stimulation to Immobilized Lower Extremities Directly Following Orthopaedic Surgery in Three Children with Cerebral Palsy: A Case Series

Cerebral palsy (CP) is a non-progressive, neurological disorder often resulting in secondary musculoskeletal impairments affecting alignment and function which can result in orthopaedic surgery. Neuromuscular electrical stimulation (NMES) is a modality that can be used for rehabilitation; however, NMES immediately following orthopaedic surgery in children with CP using surface electrodes has not been previously reported. The purpose of this case series is to describe the novel use of NMES in the acute rehabilitation phase directly after orthopaedic surgery. This case series included three children with spastic diplegia CP, Gross Motor Function Classification System level II who underwent Single Event Multi-Level orthopaedic Surgery. Each long leg cast contained window cast cut-outs to allow for surface electrode placement for daily NMES intervention to the quadriceps muscles while immobilized. Children were assessed pre- and post-operatively using the Functional Mobility Scale (FMS), Gross Motor Function Measure (GMFM-66), and 6-Minute Walk Test (6MWT). All children demonstrated no adverse effects using NMES intervention and had improvements in the 6MWT. Most children demonstrated gains in the FMS and GMFM-66. Use of NMES through window cast-cuts in a long leg cast is a novel practice approach for delivery of early rehabilitation following lower extremity orthopaedic surgery.

Alternative exercise methods for children with cerebral palsy: effects of virtual vs. traditional golf training

Aim: Sport activities can increase the number of motor tasks performed by children with disabilities, helping to motivate these children to sustain life-long exercise. The aim of this study was to investigate the effects of virtual and traditional golf training on balance, muscle strength, lower extremity flexibility and aerobic endurance in children with cerebral palsy. Methods: 19 children with unilateral cerebral palsy were divided into two groups, each of them received either virtual (n = 9) or traditional (n = 10) golf training, for over 12 weeks with three days of a 60-minute session/day. The effect of golf training was assessed with the Gross Motor Function Measure-88, the Modified Ashworth Scale and Lateral Step Up, Curl Up, Six-Minute Walk, Sit and Reach, Modified Thomas, and balance tests. Results: Both training methods were associated with improved lower extremity flexibility and muscle strength, aerobic endurance and Gross Motor Function Measure-88 compared with the pre-training baseline values (p < 0.05). There was no difference found between virtual and traditional golf training groups except for balance and lateral step up tests (p > 0.05). Conclusions: Both virtual and traditional golf training applied for 12 weeks on children with unilateral cerebral palsy improved lower extremity functions and physical performance. The use of virtual and traditional training as a complementary application to reduce motor problems in children with cerebral palsy could enhance the sustainability of this type of training because of its edutainment features. Virtual golf has an important advantage over traditional golf in that (a) the latter can be expensive and inaccessible for people with disabilities, and (b) making virtual golf a safer activity.

Reference Centiles to Monitor the 6-minute-walk Test in Ambulant Children with Cerebral Palsy and Identification of Effects after Rehabilitation Utilizing Whole-body Vibration

Background: Children with cerebral palsy present age-driven development in gross motor skills and walking capacity. Aims: To precisely monitor the 6-minute walk test (6MWT) in children with CP, GMFCS levels 1 and 2 over 6 months and to assess the effect of a 6-month rehabilitation program including whole-body vibration. Methods: Retrospective analysis of data of 157 children with CP who received standardized rehabilitation (DRKS00011331). 6MWT was assessed at the start (M0) and end of the training (M6), as well as at a 6-month follow-up (M12). Centiles were created using the lambda-mu-sigma (LMS) method. Results: We created 6MWT percentiles using data of all 157 children (M0 data). A medium treatment effect size (Cohen's d = 0.69) was found (M6 and M12 data). Conclusions: The generated centiles may help monitor 6MWT changes over 6 months. Combining WBV and conventional physiotherapy can significantly improve 6MWT in children with CP. Abbreviations: 6MWT: 6-Minute Walk Test; CP: Cerebral palsy; ES: effect size; GMFCS: Gross Motor Function Classification System; GMFM-66: Gross Motor Function Measure 66; LOESS: locally weighted scatterplot smoothing; LMS: lambda-mu-sigma; MCID: minimal clinical important difference; SD: standard deviation; SRM: standardized response mean; WBV: whole-body vibration.

Self-perceived gait quality in young adults with cerebral palsy

AIM

To explore how patients with cerebral palsy (CP) perceive their gait and evaluate associations between subjective gait perception and: objective gait parameters, endurance, pain, and fatigue.

METHOD

Sixty-two patients (21 females and 41 males; mean [SD] age 20y [5y 1mo], range 15-29y) performed a clinical gait analysis. Self-selected walking speed, Gait Profile Score, and Gait Variable Score were calculated. Subjective gait perception was assessed with a visual analogue scale using the question: 'On a scale from 0 (worst) to 10 (optimal), how would you describe your walking today?'. A 6-minute walk test (6MWT) measured endurance; the 36-Item Short Form Health Survey (SF-36) evaluated quality of life. T-tests, Pearson correlations, and univariate and multiple linear regression models were used to compare and find associations between the data.

RESULTS

Overall mean (SD) subjective gait perception was 7.5 (1.8) and was significantly higher for patients in Gross Motor Function Classification System (GMFCS) level I (7.9 [1.5]) than for patients in GMFCS levels II and III (5.9 [2.0]). Positive correlations were found between subjective gait perception and gait scores, walking speed, 6MWT distance, and SF-36 score. Only walking speed was a significant predictor of subjective gait perception.

INTERPRETATION

Subjective gait perception was influenced by GMFCS level and linked partially with the walking speed. The gait quality did not explain subjective gait perception. It is important to combine subjective and objective gait scores to develop personalized therapeutic goals.

WHAT THIS PAPER ADDS

Subjective gait perception is influenced by the physical impairment levels of patients with cerebral palsy. Subjective gait perception and objective gait scores are associated. Walking speed is the only predictor of gait perception.

The Effect of Vibration Therapy on Walking Endurance in Children and Young People With Cerebral Palsy: Do Age and Gross Motor Function Classification System Matter?

Objective

To investigate the effect of age and Gross Motor Function Classification System (GMFCS) level on walking endurance after 20 weeks of vibration therapy in children and young people with cerebral palsy (CP).

Design

The study was a clinical trial without control group comparing baseline and postintervention outcomes within participants.

Setting

Vibration therapy was performed at school or at home. Assessments took place in a clinical research unit.

Participants

Children and young people (N=59) with CP, aged 5-20 years, GMFCS level II, III, or IV, recruited through schools, physiotherapy services, and District Health Board clinics, Auckland, New Zealand.

Interventions

Participants performed side-alternating whole-body vibration therapy (WBVT) at 20 Hz and 3-mm amplitude, 9 minutes per day, 4 times per week for 20 weeks.

Main Outcome Measures

Distance walked in the 6-minute walk test (6MWT) was recorded before and after the intervention.

Results

Participants baseline results for the 6MWT were lower, independent of age or GMFCS, when compared to non-CP literature. On average, participants walked 12% further in the 6MWT after the intervention (P<.001). There was significant improvement in 6MWT distance in all age groups (5-10y: 16%, P<.001; 11-15y: 10%, P=.001; 16-20y: 13%, P<.001) and all GMFCS levels (level II: 10%, P<.001, level III: 40%, P=.013, level IV: 57%, P=.007). There was a greater percentage improvement in the distance walked in those with GMFCS level III and level IV than level II (P=.049 and P<.001, respectively).

Conclusions

WBVT had a beneficial effect on walking endurance in children and young people with CP, independent of age and GMFCS.

Physical, occupational, and speech therapy for children with cerebral palsy

AIM

To explore the relationship between rehabilitation therapies and development in children with cerebral palsy (CP).

METHOD

We conducted a prospective, longitudinal study involving 656 children with CP (mean age [SD] 6y [2y 8mo] at study entry; 1y 6mo-11y 11mo; 287 females, 369 males), and their parents. Children were assessed two to five times over 2 years by therapists using standardized measures of balance and walking endurance. Parents completed questionnaires on demographics, rehabilitation therapies, and their children's performance in self-care and participation in recreation. Therapists and parents collaboratively classified children's Gross Motor Function Classification System (GMFCS) levels. We created longitudinal graphs for each GMFCS level, depicting change across time using centiles. Using multinomial models, we analyzed the relationship between therapies (amount, focus, family-centeredness, and the extent therapies met children's needs) and whether change in balance, walking endurance, and participation was 'more than' and 'less than' the reference of 'as expected'.

RESULTS

Children were more likely to progress 'more than expected' when participating in recreation when therapies were family-centered, met children's needs, and focused on structured play/recreation. A focus on health and well-being was positively associated with participation and self-care. The amount of therapy did not predict outcomes.

INTERPRETATION

Therapy services that are family-centered, consider the needs of the child, and focus on structured play/recreational activities and health/well-being may enhance the development of children with CP.

WHAT THIS PAPER ADDS

Family-centered rehabilitation therapies were positively associated with greater participation in family/recreation activities and walking endurance. Parental perception that rehabilitation therapies met children's needs was associated with greater participation in family/recreation activities. Structured play, recreational activities, and health/well-being are important for self-care and participation when planning rehabilitation therapy. The amount of rehabilitation therapy was not related to developmental outcomes.