Factors Associated With Ambulation in Myelomeningocele: A Longitudinal Study From the National Spina Bifida Patient Registry

Accuracy in reporting incontinence in adults with spina bifida: A pilot study

BACKGROUND

The accuracy of self-reported urinary incontinence (UI) and fecal incontinence (FI) among adults with spina bifida (SB) is unknown. We aimed to quantify the accuracy of self-reported recall incontinence in the last 4 weeks using prospective diary data.

METHODS

Adults with SB were enrolled via patient advocacy groups in a larger 30-day smartphone-based ecological momentary assessment study of daily well-being and incontinence. We examined agreement between yes/no questions on exit questionnaires ("In the last 4 weeks, did you leak any urine and get your underwear, pads, pull-ups or disposable underwear wet?") and 30-day diaries. Collected data included a non-validated 4-item UI Negativity scale (UIN: 0-100, 0 = no impact). Inter-rater reliability was assessed with Cohen's kappa (>0.60 = substantial). FI was analyzed similarly. Sub-groups were too small for statistical analysis.

RESULTS

Median age of 88 adults was 35 years old (70% female, 53% shunted, 71% community ambulators). Among 81 adults reporting UI in the last month, 79 (98%) had diary-documented UI (UI agreement), 2 (2%) did not (Summary Table). Among 7 adults reporting no UI in the last month, 5 (71%) did not record UI in their diaries (agreement in no UI), 2 (29%) did. Both adults reporting no UI on exit questionnaires, despite contrary diary data, experienced single UI episodes (negativity: 0 and 6). In contrast, the UI agreement group recorded UI on median 18 days (median negativity: 22). Sensitivity of the recall UI question was 0.98 (specificity 0.71, kappa 0.69). Among 66 adults reporting FI in the last month, 65 (98%) had diary-documented FI (FI agreement), 1 (2%) did not. Among 22 adults reporting no FI in the last month, 17 (77%) did not record FI in their diaries (agreement in no FI), 5 (23%) did. Five adults reporting no FI on exit questionnaires, despite contrary diary data, experienced a median single episode (median negativity: 8). In contrast, the FI agreement group recorded FI on median 5 days (median negativity: 31). Sensitivity of the recall FI question was 0.93 (specificity 0.94, kappa 0.81). Results were unchanged when analyzing the first and last 28 days of data.

COMMENT

Sensitivity/specificity of single incontinence questions approach those reported for women with UI but without SB. Diaries may best serve SB adults with bothersome incontinence.

CONCLUSIONS

Self-reported incontinence accurately and reliably captures UI and FI among adults with SB. It may minimize less bothersome incontinence, supporting its use in screening for clinical practice and research.

Orthosis use and ambulation in adults with myelomeningocele after orthotic management from childhood

BACKGROUND

Orthotic devices are required for walking in many individuals with myelomeningocele. Evidence concerning orthosis use is sparse, partly because of heterogeneity among groups and different definitions of the neurological level.

OBJECTIVES

The objective of this study was to investigate ambulation regarding orthosis use and satisfaction with orthoses after intense orthotic management during childhood.

STUDY DESIGN

The study design is a retrospective follow-up with a cross-sectional study at adult age.

METHODS

Participants comprised 59 persons born in 1985 or later. Ambulation was categorized as community (Ca), household (Ha), nonfunctional (N-f), and nonambulation (N-a) groups. Orthosis use was registered at approximately 5 (Age5) and 12 (Age12) years of age and in adulthood (AdultAge). Satisfaction with orthoses was evaluated at AdultAge.

RESULTS

At Age5, Age12, and AdultAge, orthoses were used by 100%, 98%, and 78% of participants, respectively. Ambulation deteriorated between Age5 and Age12 in 17% of participants and between Age12 and AdultAge in 46%. At AdultAge, 63% maintained their ambulatory function; and muscle function and hip and knee flexion contractures were strongly correlated with ambulation. The ambulation groups did not differ regarding satisfaction with device or services, except in 2 single items where the Ha group differed in ratings from the N-f and N-a groups.

CONCLUSION

The high frequency of orthosis use and similar satisfaction in all ambulation groups emphasize that early planning and follow-up of orthosis treatment during growth are important for mobility in adulthood. Our results also underline the importance of a close assessment of each individual's condition.

Ambulation after in-utero fetoscopic or open neural tube defect repair: predictors for ambulation at 30 months

OBJECTIVES

To compare the ambulatory status of a cohort of children who had undergone prenatal repair of an open neural tube defect (ONTD) using one of two different methods (fetoscopic or open hysterotomy) with that of a cohort who had undergone postnatal repair, and to identify the best predictors of ambulation at 30 months of age.

METHODS

This was a retrospective review of a cohort of children who underwent ONTD repair either prenatally (n = 110), by fetoscopic surgery (n = 73) or open hysterotomy surgery (n = 37), or postnatally (n = 51), in a single tertiary hospital between November 2011 and May 2023. The cohort comprised a consecutive sample of cases who had undergone ONTD repair in-utero following Management of Myelomeningocele Study (MOMS) trial criteria and cases who had undergone postnatal repair, meeting the same criteria, which were also followed up after birth at the same institution. Motor function assessment by ultrasound was recorded at referral, 6 weeks after prenatal repair, or after referral in postnatally repaired cases, and at the last ultrasound scan before delivery. Clinical examinations to assess motor function at birth and at 12 months were retrieved from records. Intact motor function was defined as first sacral myotome (S1) motor function. Ambulatory status data at each follow-up visit were collected. The proportion of children who were able to walk independently after 30 months of age was compared between those who had undergone fetoscopic vs open prenatal surgery and between prenatal (by either fetoscopic or open surgery) and postnatal ONTD repair. Logistic regression analyses were performed to identify predictors for independent ambulation.

RESULTS

After 30 months, the proportion of infants who were able to walk independently was higher in prenatally vs postnatally repaired cases (51.8% vs 15.7%, P < 0.01), and there was no difference between those with fetoscopic (52.1%) vs open (51.4%) prenatal repair (P = 0.66). In the prenatally repaired group, having intact motor function at 12 months (adjusted odds ratio (aOR), 9.14 (95% CI, 2.64-31.63), P < 0.01) and at birth (aOR, 4.50 (95% CI, 1.21-16.80), P = 0.02) were significant predictors of independent walking at 30 months; an anatomical level of lesion below L2 at referral (aOR, 1.83 (95% CI, 1.30-2.58), P = 0.01) and female gender (aOR, 3.51 (95% CI, 1.43-8.61), P < 0.01) were also predictive for this outcome.

CONCLUSIONS

Prenatally repaired cases of ONTD have a better chance of being able to walk independently at 30 months than do those who undergo postnatal repair. In patients with prenatally repaired ONTD, ambulatory status at 30 months can be predicted by observing a low lesion level at referral (below L2) and intact motor function postnatally. These results have implications for parental counseling and planning for supportive therapy in pregnancies affected by ONTD. © 2024 International Society of Ultrasound in Obstetrics and Gynecology.

Age-Specific Probability of 4 Major Health Outcomes in Children with Spina Bifida

OBJECTIVE

This study aimed to estimate the age-specific probability of 4 health outcomes in a large registry of individuals with spina bifida (SB).

METHODS

The association between age and 4 health outcomes was examined in individuals with myelomeningocele (MMC, n = 5627) and non-myelomeningocele (NMMC, n = 1442) from the National Spina Bifida Patient Registry. Sixteen age categories were created, 1 for each year between the ages of 5 and 19 years and 1 for those aged 20 years or older. Generalized linear models were used to calculate the adjusted probability and 95% prediction intervals of each outcome for each age category, adjusting for sex and race/ethnicity.

RESULTS

For the MMC and NMMC groups, the adjusted coefficients for the correlation between age and the probability of each outcome were -0.933 and -0.657 for bladder incontinence, -0.922 and -0.773 for bowel incontinence, 0.942 and 0.382 for skin breakdown, and 0.809 and 0.619 for lack of ambulation, respectively.

CONCLUSION

In individuals with SB, age is inversely associated with the probability of bladder and bowel incontinence and directly associated with the probability of skin breakdown and lack of ambulation. The estimated age-specific probabilities of each outcome can help SB clinicians estimate the expected proportion of patients with the outcome at specific ages and explain the probability of the occurrence of these outcomes to patients and their families.

Physical function and activity, pain, and health status in adults with myelomeningocele after orthotic management from childhood: a descriptive study

BACKGROUND

Individuals with myelomeningocele (MMC) exhibit neurological deficits below the lesion level involving both motor and sensory functions. Ambulation and functional outcomes in patients offered orthotic management since childhood were investigated.

METHODS

Physical function, physical activity, pain, and health status were assessed in a descriptive study.

RESULTS

Of 59 adults with MMC, aged 18-33 years, 12 were in the community ambulation (Ca), 19 in the household ambulation (Ha), six in the non-functional (N-f), and 22 in the non-ambulation (N-a) groups. Orthoses were used by 78% (n = 46), i.e., by 10/12 in the Ca, 17/19 in the Ha, 6/6 in the N-f, and 13/22 in the N-a groups. In the ten-metre walking test, the non-orthosis group (NO) walked faster than those wearing ankle-foot orthoses (AFOs) or free-articulated knee-ankle-foot orthoses (KAFO-Fs), the Ca group faster than the Ha and N-f groups, and the Ha group faster than the N-f group. In the six-minute walking test, the Ca group walked farther than the Ha group. In the five times sit-to-stand test, the AFO and KAFO-F groups required longer than the NO group, and the KAFO-F group longer than the foot orthosis (FO) group. Lower extremity function with orthoses was higher in the FO than the AFO and KAFO-F groups, higher in the KAFO-F than the AFO group, and higher in the AFO group than in those using trunk-hip-knee-ankle-foot orthoses. Functional independence increased with ambulatory function. Time spent in physical recreation was higher in the Ha than the Ca and N-a groups. There were no differences between the ambulation groups in rated pain or reported health status.

CONCLUSION

The physical function results in persons with MMC improve our understanding of this population's heterogeneity and shed light on the importance of individualized orthotic management. The similarities between the various ambulatory levels in physical activity, pain, and health status may mirror opportunities to achieve equal results regardless of disability level. A clinical implication of the study is that orthotic management is likely to be beneficial for the patient with MMC of which the majority used their orthoses for most time of the day.

Risk factors for unanticipated hospitalizations in children and youth with spina bifida at an urban children's hospital: A cross-sectional study

BACKGROUND

Spina bifida (SB) is a condition resulting from the improper closure of the neural tube and vertebral column during fetal development. While patients' life expectancy and quality of life have improved dramatically due to medical advances, children continue to experience health-related issues that often require hospitalizations.

OBJECTIVE

The association among sociodemographic and clinical characteristics with potentially preventable hospitalizations (PPH) in children and youth with myelomeningocele type SB was investigated in this cross-sectional study.

METHODS

Chart reviews and data extraction were conducted on 108 children and youth, ages 1 month to 21 years, admitted for PPH in a regional children's academic medical center between May 2017 and July 2019. Sociodemographic variables included sex, age, type of insurance and ethnicity. Clinical variables included level of lesion, ambulation status, shunt dependency and selected diagnostic categories. Univariate, bivariate, and multivariate analyses were conducted to identify factors associated with PPH.

RESULTS

Factors associated with PPH included being male, ages 5-18 years, low lumbar level lesions, non-ambulatory, with public insurance, Hispanic and shunt dependent. Most hospitalizations (73%) were for neurologic or urologic conditions. Factors independently associated with PPH were ethnicity for urologic conditions, being ambulatory for metabolic conditions, and age for gastroenterology conditions.

CONCLUSION

Selected demographic and clinical variables were found to be associated with PPH of children and youth with myelomeningocele-type SB. The most common reasons for PPH were shunt malfunctions and urinary tract infections, consistent with other studies.

Fetal Surgery for Myelomeningocele: Neurosurgical Perspectives

More than 30 years have elapsed since it was recognised that folic acid supplementation could substantially reduce the risk of open neural tube defects (ONTDs). During that time, many countries have adopted policies of food fortification with demonstrable reduction in the incidence of both cranial and spinal ONTDs. Improved prenatal detection and termination has also resulted in a reduction in the number of affected live births. Nonetheless, in the USA about 1500 children, and in the UK around 500 children are born each year with myelomeningocele (MMC) and so the management of MMC and its complications continues to constitute a significant clinical workload for many paediatric neurosurgical units around the world.Until recently, the options available following antenatal diagnosis of MMC were termination of pregnancy or postnatal repair. As a result of the MOMS trial, prenatal repair has become an additional option in selected cases (Adzick et al., N Engl J Med 364(11):993-1004, 2011). Fetal surgery for myelomeningocele is now offered in more than 30 centres worldwide. The aim of this chapter is to review the experimental basis of prenatal repair of MMC, to critically evaluate the neurosurgical implications of this intervention and to describe the technique of 'open' repair, comparing this with emerging minimally invasive alternatives.

Factors Associated With Ambulation and Transfer Ability: A Study From the National Spina Bifida Patient Registry

OBJECTIVES

This study used a spina bifida electronic medical record and the National Spina Bifida Patient Registry to explore the relationship between neurosurgical/orthopedic surgeries and other variables on ambulation and transfer ability over time in individuals with spina bifida.

DESIGN

This study was an analysis of longitudinal data collected within the National Spina Bifida Patient Registry and spina bifida electronic medical record. Logistic regression models were used to determine which variables were associated with ambulation/transfer ability in the myelomeningocele (MMC) and non-MMC populations.

RESULTS

Longitudinal data from 806 individuals were collected. In the MMC group, decreased ambulation ability was associated with higher motor levels, tethered cord releases, spine/scoliosis surgeries, hip orthopedic surgeries, and having supplemental insurance. Increased ambulatory ability was associated with lower motor levels, tibial torsion/related surgeries, ankle/foot surgeries, being female, and being non-Hispanic/Latinx. Decreased transfer ability was associated with being Hispanic/Latinx and having higher motor levels. Lower motor level and ankle/foot surgeries were associated with increased transfer ability. No significant associations were found in the non-MMC group.

CONCLUSIONS

Motor level is an important predictor of ambulation and transfer ability in MMC. Surgeries distal to the knee were associated with higher levels of function; surgeries proximal to the knee were associated with lower functional levels.

Variability in lower extremity motor function in spina bifida only partially associated with spinal motor level

PURPOSE

Previous studies have found motor function to correlate with spinal motor level and, accordingly, individuals with spina bifida are frequently categorized clinically in this manner. The aim of the current study was to describe how lower extremity functions including strength, selective motor control, and mirror movements vary by motor level in children and young adults with spina bifida.

METHODS

A single center, retrospective, cross-sectional, descriptive study using data collected in the National Spina Bifida Patient Registry and by a gait laboratory was performed.

RESULTS

Seventy-seven individuals with spina bifida were included with the majority having myelomeningocele (59 lumbar, 18 sacral motor level). Lower extremity strength and selective motor control varied to a certain extent with motor level. However, 90% of individuals showed strength or weakness in at least one muscle group that was unexpected based on their motor level. Mirror movements did not clearly vary with motor level.

CONCLUSION

Lower extremity strength, selective motor control, and mirror movements in individuals with spina bifida were not entirely predicted by motor level. This highlights the possible need for an improved spina bifida classification system that describes not only spinal motor level but more clearly defines a particular individual's functional motor abilities.

Functional level of lesion scale: Validating fourteen years of research with the national spina bifida patient registry

PURPOSE

Functional level of lesion (FLOL) is a grading of the level of neurological function in patients with myelomeningocele and other forms of spina bifida. It has been widely used as an independent variable in studies of spina bifida, but its inter-rater reliability has not previously been tested. The purpose of this study was to measure inter-rater reliability of FLOL testing and compare testing performed by a non-medically trained research associate to testing performed by a pediatric rehabilitation medicine specialist.

METHODS

Children in a multi-disciplinary spina bifida clinic underwent FLOL grading by a non-medically trained research associate. On the same day, these children were also graded by a pediatric rehabilitation medicine specialist. Cohen's weighted kappa statistic was used to compare grading, with the rehabilitation medicine specialist considered the gold standard.

RESULTS

A total of 71 patients participated. FLOL was graded for left and right leg for each participant, resulting in 142 measurements. Cohen's weighted kappa was κ= 0.809, with a standard error of 0.034 and 95% confidence interval 0.723-0.875, indicating substantial agreement.

CONCLUSION

FLOL as measured according to the instructions of the National Spina Bifida Patient Registry by a non-medically trained researcher is a reliable method to grade lower extremity function in spina bifida.

Outcomes of a child-based manual wheelchair skills peer training program: an exploratory case report

PURPOSE

The purpose of this exploratory case series was to describe the outcomes for both a child-learner and a child-peer after a single manual wheelchair (MWC) skills training session involving child-based peer training techniques, followed by related home-based skills practice.

MATERIALS AND METHODS

Participants were a 9-year-old with L4-L5 spina bifida (pseudonym: Amari) and a 3-year-old with T10 spina bifida (pseudonym: Mary). Pre-intervention examination included administration of the Wheelchair Skills Test Questionnaire (WST-Q), the MWC short scale within the Mobility domain of the Paediatric Evaluation of Disability - Computer Adapted Test (MWC PEDI-CAT), and the Canadian Occupational Performance Measure (COPM). The peer training session, facilitated by a physical therapy team, involved games and activities involving MWC use. When appropriate, Amari was asked to talk aloud and verbally describe the components of the skills she was performing. Each child and her mother were instructed in specific MWC skills to practice at home over a 3-week period.

RESULTS

Both participants' post-intervention WST-Q capacity, confidence, and performance scores increased. Increases in parent-proxy COPM scores indicated clinically meaningful change in all identified occupational performance problems. Mary's total MWC PEDI-CAT post-intervention score increased by 11 points. Both mothers reported that the participation in the activities helped also to improve their child's self-esteem and self-image.

CONCLUSIONS

Both the participants in this exploratory case appeared to demonstrate improvements in MWC skills, self-esteem, and self-image following a single child-based MWC skills peer training session and related home-based skills practice. Future research involving such peer training methods is warranted.

[Prenatal ultrasound prognostic of myelomeningocele at the era of fetal surgery]

Myelomeningocele (MMC) is a severe congenital condition responsible for motor and sensory impairments of the lower limbs, incontinence and cognitive impairment. Its screening, sometimes as early as the first trimester, is one of the major goals of modern prenatal care, supported by the emergence of prenatal surgery that results in a significant improvement in motor function, ambulation and ventriculoperitoneal shunt rate in patients undergoing in-utero surgery. From screening to pre- and post-operative prognostic evaluation, prenatal ultrasound is now an essential tool in the antenatal management of this condition. Using the multi planar and three-dimensional modes, it can be used to assess the vertebral level of MMC, which remains the key antenatal prognostic marker for motor function and ambulation, incontinence and the need for a ventriculo-peritoneal shunt. A careful and systematic ultrasound examination also makes it possible to assess the severity and progression of ventriculomegaly, to search for associated cerebral, spinal cord or vertebral anomalies, or to rule out exclusion criteria for in-utero surgery such as severe kyphosis or serious cortical anomalies. New tools from post-natal evaluation, such as the "metameric" ultrasound assessment of lower limb mobility, appear to be promising either for the initial examination or after in-utero surgery. Ultrasonography, associated with fetal MRI, cytogenetic and next generation sequencing, now allows a highly customized prognostic evaluation of these fetuses affected by MMC and provides the parents with the best possible information on the expected benefits and limitations of fetal surgery.