Birth prevalence of congenital talipes equinovarus in low- and middle-income countries: a systematic review and meta-analysis

Successful Ponseti-treated Clubfeet at Age 2 Years: What Is the Rate of Surgical Intervention After This?

BACKGROUND

In recent decades, nonoperative Ponseti casting has become the standard of care in the treatment of idiopathic clubfoot. However, the rate of recurrence, even after successful Ponseti treatment is not insignificant. The purpose of this study was to determine the future rate, timing, and type of surgery needed in patients whose idiopathic clubfeet treated by Ponseti casting were considered successful at the age of 2 years.

METHODS

Inclusion criteria for this retrospective study were patients under 3 months with idiopathic clubfoot treated exclusively by Ponseti casting, who had successful outcomes at 2 years of age without surgery, and who had at least 5 years of follow-up. The total number of surgical interventions in the age range 2 to 5 and above 5 years, the number and type of procedures performed, and the timing of surgery were reviewed.

RESULTS

Three hundred thirty-six patients with a total of 504 clubfeet fulfilled the inclusion criteria. One hundred twenty-two of these 336 patients (36.3%) eventually underwent surgical intervention. Between 2 and 5 years of age, 79 patients (23.5%) with 104 feet (20.6%) underwent surgery. The most common procedures performed between 2 and 5 years were limited (a la carte) in scope: tibialis anterior tendon transfer, posterior release, plantar fascia release, and repeat tendo-Achilles lengthening. At age above 5 years, 53 patients (20.1%) with 65 feet (16.9%) underwent surgery. Ten of these 53 patients had already undergone surgery between 2 and 5 years of age. The procedures most commonly performed were similar.

CONCLUSIONS

In patients with idiopathic clubfoot who reached 2 years of age with successful outcomes from Ponseti cast treatment, ∼35% eventually underwent surgical intervention, mostly limited (a la carte), to regain or maintain a plantigrade foot. The most commonly performed procedures include tibialis anterior tendon transfer, posterior capsular release, plantar fascia release and repeat tendo-Achilles lengthening, either in isolation or in combination. However, before considering surgery, the need for these procedures can, and should, be minimized by recasting recurrent deformities using Ponseti method.

LEVEL OF EVIDENCE

Level III.

The reliability and validity of the weight-bearing lunge test in a Congenital Talipes Equinovarus population (CTEV)

Question

What is the intra and inter-rater reliability and concurrent validity of the weight-bearing lunge test within a Congenital Talipes Equinovarus population?

Design

Test retest design for reliability and validity. The measure was taken, following preconditioning of the participants, using distance from wall, angle at distal posterior tibia using a digital inclinometer and the iPhone level function, twice by each rater. The raters included a clinician, clinician in training and a parent/carer.

Outcome measures

Weight bearing lunge test as a measure of ankle dorsiflexion.

Results

Twelve children aged 5–10 years were eligible to participate and consented, along with their parents. Intra-reliability of distance measures for all raters were good to excellent (ICC clinician 0.95, ICC training clinician 0.98 and ICC parent 0.89). Intra-rater reliability of the iPhone for all raters was good (ICCs > 0.751) and good to excellent for the inclinometer (ICC clinician 0.87, ICC training clinician 0.90). Concurrent validity between the clinician’s and parents distance measure was also high with ICC of 0.899. Inter-rater reliability was excellent for distance measure (ICC = 0.948), good for the inclinometer (ICC = 0.801) and moderate for the iPhone (ICC = 0.68). Standard error of measurement ranged from 0.70–2.05, whilst the minimal detectable change ranged from 1.90–5.70.

Conclusion

The use of the WBLT within this CTEV population has demonstrated good to excellent reliability and validity amongst clinicians, clinicians in training and parents/carers, supporting its use as an assessment measure of dorsiflexion range of motion. There is support for parents/carers to use the WBLT at home as a monitoring assessment measure which may assist with early detection of a relapse.

Trial registration

University of South Australia’s ethics committee (ID: 201397); Women’s and Children’s Hospital ethics committee (AU/1/4BD7310).

A retrospective study of idiopathic clubfoot managed by Ponseti method using Pirani and Dimeglio scoring, in Indian population: a minimum 3-year follow-up

Congenital talipo-equino-varus (CTEV) is one of the most common congenital deformities affecting children in India with an incidence of 1.19/1000 live births. Ponseti treatment regimen has been established as the gold standard of care for idiopathic clubfoot. We present quantitative and qualitative analysis of the results of Ponseti management in early presenting idiopathic clubfoot cases, with a minimum follow-up of three years after correction. We retrospectively analysed the data of 122 children (comprising a total of 191 feet) who were treated for clubfoot by the standard Ponseti method with a minimum 3-year follow-up post-correction at our clinic. All cases were treated under the supervision of a single senior Paediatric Orthopaedic Surgeon. The mean age at onset of treatment was 2.3 months. Mean follow-up period was 4.2 years. The mean number of casts applied was 6.7. The mean duration of treatment until the application of splint was 9.5 weeks. The mean Pirani score at the commencement of treatment was 4.5. At the completion of treatment (around 3.6 years of age), the Dimeglio score was 'Benign' (Good) in 106 cases, 'Moderate' (Fair) in 11 cases and 'Severe/Very Severe' (Poor) in 5 cases. The P-value was calculated to be 0.8 for the sex-wise comparison of the treatment outcome. Ponseti method of nonoperative treatment for idiopathic clubfeet remains a gold standard for all cases treated during infancy. Identifying atypical clubfeet is important as their prognosis ought to be guarded. Despite facing problems at various stages of management, adhering to the basic treatment principles laid down by Ponseti helps in achieving good outcomes in majority. Level of Evidence: IV.

'Return to the New Normal': Innovative Solutions for Safe Ponseti Casting in Clubfoot Clinics during the COVID-19 Pandemic

Clubfoot treatment using the Ponseti method has been severely impacted as a result of lockdown measures implemented by several countries during the COVID-19 pandemic. As clubfoot clinics begin phased re-opening, we describe various innovative techniques to protect patients and healthcare providers during delivery of clubfoot treatment services. In addition to standard social distancing measures and sanitization protocols, we report a simple and innovative technique of 'barrier casting' or 'ring-fencing' to potentially reduce the risk of droplet infection and airborne transmission during clubfoot casting and tenotomy. A transparent, disposable plastic drape is set up as a curtain and serves as an impermeable barrier between the caregiver and healthcare provider performing the casting or tenotomy. The plastic drape is cheap (< US$ 1.5), easily available and can be used effectively even in low- and middle-income countries which have a high patient load. We have utilized these innovative techniques in 43 consecutive patients since clinic re-opening and are satisfied that they are effective, economical and easily reproducible even in countries with limited resources. Innovative techniques, which have the potential to reduce the risk of disease transmission, will help in the rapid recovery of clubfoot treatment services as countries emerge from months of lockdown.

Changes in the Management of Clubfoot Cases During COVID-19 Pandemic-A Survey Among Orthopaedic Specialists

PURPOSE

The on-going COVID-19 pandemic has curtailed the established practice norms of many ailments including clubfoot. We conducted a survey to study the changes in the clubfoot treatment practices, Achilles tenotomy methods, and the role along with the possible impact of teleconsultation during this pandemic.

METHODS

A web-based survey was conducted using a questionnaire prepared on Google forms. The link for this questionnaire was sent to Indian Orthopaedic specialists with a special interest in clubfoot management via a social messaging platform.

RESULTS

127 eligible responses were analysed. Of them, 67% respondents were in practice for more than 10 years. During the study period, 30.7% of doctors did not perform any casting; 66.9% performed casting in 1-5 cases per week and only 2.4% performed casting in more than five cases per week. A statistically significant difference was noted in the number of doctors who performed casting in less than five cases per week and the doctors who performed casting in more than five cases per week, before and during the COVID-19 pandemic. 30.7% of doctors deferred doing Achilles tenotomy during the study period, and among those who performed one, a significant number of them avoided tenotomy under general anaesthesia.

CONCLUSION

The COVID-19 pandemic has significantly impacted clubfoot treatment practices during the lockdown period in India. Significant reductions in the number of cases, and a reduction with changes in Achilles tenotomy practices were noted too. However, whether this had any adverse influence on the eventual outcome in these feet is yet to be determined.

Clubfoot deformity in the Solomon Islands: Melanesian versus Polynesian ethnicity, a retrospective cohort study

PURPOSE

Congenital talipes equinovarus (CTEV) has a high incidence in the South Pacific, with New Zealand Maori and Polynesian rates of up to seven per 1000 live births, at least five times higher than the Caucasian population. A genetic component is suggested to explain this, however, there is little information regarding the difference of incidence between Polynesian and Melanesian ethnicity in the South Pacific. Our aim was to investigate the effects of ethnicity on the incidence of CTEV in the Solomon Islands, specifically comparing Melanesian and Polynesian ethnicity.

METHODS

Between 2011 and 2017, data was collected in the Solomon Islands from over 40 clinics upon introduction of the Ponseti programme for treatment of CTEV. Records were kept using the validated Global Clubfoot Initiative data form. Ethnicity was documented, including family history.

RESULTS

In total, 138 children presented during this period, with 215 affected feet reviewed and treated. In all, 74% of children had solely Melanesian parents and 6% Polynesian. Using the general population ethnic breakdown of 95.3% Melanesian and 3.1% Polynesian, the odds of CTEV in children of Melanesian parents were 0.41 times lower compared with the odds in children of Polynesian parents.

CONCLUSION

The results indicate that in the Solomon Islands, CTEV in Melanesian children was less than half as likely to occur in Polynesian children. Our findings also support the theories of minimal Polynesian genetic material persisting in the Solomon Islands and a different genetic risk of CTEV between Polynesians and Melanesians.

LEVEL OF EVIDENCE

III.

The Ponseti method of treatment for neuromuscular and syndromic (non-idiopathic) clubfeet: evaluation of a programme-based approach at a mean follow-up of 5.8 years

PURPOSE

To analyse the results of the Ponseti method in the treatment of non-idiopathic clubfeet and compare them with idiopathic clubfeet in a programme-based setting using a standardized protocol METHODS: We reviewed two groups of 782 children treated prospectively in our programme-based Clubfoot Clinic: group I comprised of 89 patients (146 feet) with non-idiopathic clubfoot and group II comprised of 693 patients (1032 feet) with idiopathic clubfoot. Both groups were compared on the basis of patient demographics, number of casts, tenotomy rate, success rate, rate of recurrences, and the need for additional secondary procedures.

RESULTS

Non-idiopathic clubfeet had a higher incidence of bilateral involvement (p = 0.0093) and affected both males and females equally (p = 0.002) as compared with idiopathic clubfeet. Non-idiopathic clubfeet (group I) required significantly more casts (6.75 ± 4.2) compared with idiopathic clubfeet (4.23 ± 4.14), had a higher rate of Achilles tenotomy (90.4% vs 75%, p < 0.0001), and had a lower initial correction rate compared with idiopathic clubfeet (92.5% vs 100%, p < 0.0001). There was a significant difference in the recurrence rates between the two groups, as 42.5% of non-idiopathic feet (38 patients) relapsed compared with 10.2% (71 patients) in the idiopathic group (p < 0.0001). Most recurrences in group I were amenable to re-casting, with only nine patients (14 non-idiopathic clubfeet) requiring extensive soft tissue releases. The final success rate in the non-idiopathic group at a mean follow-up of 5.8 years (2-8 years) was 87.7%.

CONCLUSIONS

We recommend the use of the Ponseti method as an effective treatment for non-idiopathic clubfeet associated with neuromuscular and syndromic conditions.

Associated anomalies in cases with congenital clubfoot

Congenital clubfoot CTEV is a common congenital anomaly, its etiology is unclear and its pathogenesis is controversial. Cases with CTEV often have other non-CTEV associated congenital anomalies. The purpose of this study was to assess the prevalence and the types of these associated anomalies in a defined population. The associated anomalies in cases with CTEV were collected in all livebirths, stillbirths, and terminations of pregnancy during 29 years in 387,067 consecutive births in the area covered by our population-based registry of congenital malformations. Of the 504 cases with CTEV, representing a prevalence of 13.02 per 10,000, 107 (21.2%) had associated anomalies. There were 31 (6.1%) cases with chromosomal abnormalities, and 21 (4.2%) non-chromosomal recognized dysmorphic conditions including syndromes: 6 arthrogryposis multiplex congenita, 2 22q11.2 microdeletion, and one fetal alcohol syndrome. Fifty-five (10.9%) of the cases had nonsyndromic multiple congenital anomalies (MCA). Anomalies in the cardiovascular, the central nervous, the urinary, the orofacial, and the musculoskeletal systems were the most common other anomalies in the cases with MCA. The anomalies associated with CTEV could be classified into a recognizable malformation syndrome in 52 of the 107 cases (48.6%) with associated anomalies. This study included special strengths: it is population-based, each affected child was examined by a geneticist, all elective terminations were ascertained, and the surveillance for anomalies was continued until 2 years of age. In conclusion the overall prevalence of associated anomalies, one of five cases, emphasizes the need for a screening for other anomalies in cases with CTEV.

Ilizarov Frame Application Based on Ponseti Principles for Clubfoot Correction: A Case Report and Description of Surgical Technique

Ilizarov external fixator has proved to be a successful method in the management of neglected and relapsed clubfoot cases as it has lesser surgical morbidity, better functional outcome and does not cause shortening of foot as compared to other surgical methods. Though Ilizarov has been routinely used in the management of neglected/relapsed CTEV, residual varus and equinus deformities are still present/recur in some cases. Here we demonstrated a surgical technique in a case of 8-year-old child with residual club foot who achieved good functional outcome after being treated using Ilizarov frame application in lieu with Ponseti's principles.

Remote monitoring of clubfoot treatment with digital photographs in low resource settings: Is it accurate?

Background

Clinical examination and functional assessment are often the first steps to assess outcome of clubfoot treatment. Clinical photographs may be an adjunct used to assess treatment outcomes in lower resourced settings where physical review by a specialist is limited. We aimed to evaluate the diagnostic performance of photographic images of patients with clubfoot in assessing outcome following treatment.

Methods

In this single-centre diagnostic accuracy study, we included all children with clubfoot from a cohort treated between 2011 and 2013, in 2017. Two physiotherapists trained in clubfoot management calculated the Assessing Clubfoot Treatment (ACT) score for each child to decide if treatment was successful or if further treatment was required. Photographic images were then taken of 79 feet. Two blinded orthopaedic surgeons assessed three sets of images of each foot (n = 237 in total) at two time points (two months apart). Treatment for each foot was rated as ‘success’, ‘borderline’ or ‘failure’. Intra- and inter-observer variation for the photographic image was assessed. Sensitivity, specificity, positive and negative predictive values were calculated for the photographic image compared to the ACT score.

Results

There was perfect correlation between clinical assessment and photographic evaluation of both raters at both time-points in 38 (48%) feet. The raters demonstrated acceptable reliability with re-scoring photographs (rater 1, k = 0.55; rater 2, k = 0.88). Thirty percent (n = 71) of photographs were assessed as poor quality image or sub-optimal patient position. Sensitivity of outcome with photograph compared to ACT score was 83.3%–88.3% and specificity ranged from 57.9%–73.3%.

Conclusion

Digital photography may help to confirm, but not exclude, success of clubfoot treatment. Future work to establish photographic parameters as an adjunct to assessing treatment outcomes, and guidance on a standardised protocol for photographs, may be beneficial in the follow up of children who have treated clubfoot in isolated communities or lower resourced settings.

Clinical outcomes of iatrogenic complex clubfoot treated with modified Ponseti method

INTRODUCTION

There are not enough studies demonstrating the results of the modified Ponseti method on iatrogenic complex clubfoot that occurs due to errors during the application of the method for treating idiopathic clubfoot. The present study aimed to present the treatment results of the modified method reported by Ponseti for treating feet that became complex solely due to errors during casting.

METHODS

Patients with the confirmed diagnosis of iatrogenic complex clubfoot were according to initial physicians' report and photographs were included in this retrospective case series study. Patients with congenital atypical feet, incomplete medical records, and accompanying pathologies were excluded from the study. Patients' clinical data and clinical scores were recorded at the initial visit and at the latest follow-up.

RESULTS

There were 21 children (15 boys and 8 girls) with 32 complex clubfeet. Initial correction was achieved in all children, with an average of five serial casts (range 3 to 6 casts). At the last follow-up, ISGCF score of 25 feet (78.1%) was excellent and seven feet (21.9) was good.

CONCLUSION

According to the results acquired from this study, an iatrogenic complex clubfoot can be successfully treated using the modified Ponseti method.

Meningomyelocele with unusual feet deformity combination: A report of a rare case

A 19-month-old male infant had presented to a paediatric orthopaedic clinic at the age of 6 months with meningomyelocele and bilateral feet deformity. The patient was admitted to the neonatal intensive care unit because of multiple congenital anomalies. These anomalies included meningomyelocele, right clubfoot, left vertical talus, imperforated anus, and an indirect hernia. Radiographs confirmed the diagnosis of right clubfoot and left-sided vertical talus. The course of management was delayed because of late diagnosis. At the age of 9 months, the patient underwent serial casting using the Ponseti and reverse Ponseti techniques for right clubfoot and left-sided vertical talus, respectively. The casting was performed weekly for 12 weeks. The right foot gained normal position before the left, but we decided to keep it in the cast until surgical correction was performed for both feet. The patient underwent right Achilles tendon tenotomy and casting and left Achilles tendon tenotomy, manipulation, and talonavicular reduction and k-wire fixation with casting. The casts remained for 3 and 6 weeks (clubfoot and vertical talus, respectively). The ultimate goal of the treatment was to produce braceable, plantigrade feet with the use of a well-padded knee ankle-foot orthosis to improve the quality of life.

The Ponseti Method Decreased the Surgical Incidence in Children with Congenital Clubfoot: A Population-Based, 8 Birth-Year Cohort Study

BACKGROUND

With the introduction of the Ponseti method for congenital clubfoot, the relapse rate and the surgical rate have been remarkably reduced. However, data from population studies for patients up to 10 years of age are still lacking. This study aimed to survey the relapse and surgery rates in the first 10 years of life in children with congenital clubfoot before and after introduction of the Ponseti method in Taiwan using the National Health Insurance Research Database (NHIRD).

METHODS

We retrieved clubfoot cases and related surgical procedures determined by International Classification of Diseases, Ninth Revision (ICD-9) 754.51 from the 1999-2016 NHIRD. Foot and ankle surgical procedures coded as ICD-9 754.51 for patients who were older than 6 months of age were regarded as surgical procedures for relapsed or residual deformities. The rate of clubfoot release when the patients were 0.5 to 1 year of age and extensive surgical procedures in the first 10 years of life were assessed among 8 birth-year cohorts (1999 to 2006) with a 10-year follow-up.

RESULTS

Among 622 children with idiopathic congenital clubfoot diagnosis, 301 underwent a total of 367 surgical procedures for clubfoot between 6 months and 10 years of age. Disease incidence of 0.32 per 1,000 live births remained stable in the 8 birth-year cohorts. After the Ponseti method was introduced in 2002, there was a decrease in the clubfoot release rate in the 0.5 to 1-year age group (25.8% in the 1999 to 2002 birth-year cohorts compared with 17.6% in the 2003 to 2006 birth-year cohorts) and the rate of extensive surgical procedures (41.5% in the 1999 to 2002 birth-year cohorts compared with 31.3% in the 2003 to 2006 birth-year cohorts), both determined to be significant at p < 0.05 using the chi-square test. A significant decreasing trend (p < 0.05) was revealed in the rate of clubfoot release in patients who were 0.5 to 1 year of age by polynomial correlation, with an increasing negative slope after a turning point around 2002. The Ponseti method increased the ratio of minor to extensive surgical procedures when a surgical procedure was required.

CONCLUSIONS

The Ponseti method decreased subsequent extensive surgical procedures for clubfoot, especially in the group that was 0.5 to 1 year of age.

LEVEL OF EVIDENCE

Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

A hospital-based birth defects surveillance system in Kampala, Uganda

Background

In 2010, the World Health Assembly passed a resolution calling upon countries to prevent birth defects where possible. Though birth defects surveillance programs are an important source of information to guide implementation and evaluation of preventive interventions, many countries that shoulder the largest burden of birth defects do not have surveillance programs. This paper shares the results of a hospital-based birth defects surveillance program in Uganda which, can be adopted by similar resource-limited countries.

Methods

All informative births, including live births, stillbirths and spontaneous abortions; regardless of gestational age, delivered at four selected hospitals in Kampala from August 2015 to December 2017 were examined for birth defects. Demographic data were obtained by midwives through maternal interviews and review of hospital patient notes and entered in an electronic data collection tool. Identified birth defects were confirmed through bedside examination by a physician and review of photographs and a narrative description by a birth defects expert. Informative births (live, still and spontaneous abortions) with a confirmed birth defect were included in the numerator, while the total informative births (live, still and spontaneous abortions) were included in the denominator to estimate the prevalence of birth defects per 10,000 births.

Results

The overall prevalence of birth defects was 66.2/10,000 births (95% CI 60.5–72.5). The most prevalent birth defects (per 10,000 births) were: Hypospadias, 23.4/10,000 (95% CI 18.9–28.9); Talipes equinovarus, 14.0/10,000 (95% CI 11.5–17.1) and Neural tube defects, 10.3/10,000 (95% CI 8.2–13.0). The least prevalent were: Microcephaly, 1.6/10,000 (95% CI 0.9–2.8); Microtia and Anotia, 1.6/10,000 (95% CI 0.9–2.8) and Imperforate anus, 2.0/10,000 (95% CI 1.2–3.4).

Conclusion

A hospital-based surveillance project with active case ascertainment can generate reliable epidemiologic data about birth defects prevalence and can inform prevention policies and service provision needs in low and middle-income countries.

Retinoic Acid Promotes Retinoic Acid Signaling by Suppression of Pitx1 In Tendon Cells: A Possible Mechanism of a Clubfoot-Like Phenotype Induced by Retinoic Acid

Background

The pathogenesis of idiopathic congenital clubfoot (CCF) is unknown. Although some familial patients have Pitx1 mutations, and the Pitx1+/− genotype causes a clubfoot-like phenotype in mice, the mechanism of Pitx1-induced CCF is unknown.

Material/Methods

We used tibialis anterior tendon samples to detect the expression of Pitx1 in idiopathic and neurogenic clubfoot patients. After obtaining Sprague-Dawley (SD) rat Achilles tendon cells, the expression of Pitx1 was knocked down by SiRNA. After 48 h of culture, mass spectrometry was used to quantitatively analyze proteins. Then, Gene Ontology (GO) analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis were used to assess the downstream pathway of PITX1. The relationship between Pitx1 and the promoter region of deacetylase 1 (Sirtuin-1 and Sirt1) was examined by luciferase and ChIP assays.

Results

We found that Pitx1 expression in the tendon samples of idiopathic CCF patients was downregulated. Mass spectrometry analysis revealed that the inhibition of Pitx1 induced the downregulation of Sirt1 expression in tendon cells. Luciferase and ChIP assays confirmed that Pitx1 binds to the promoter region of SIRT1 and promotes Sirt1 gene transcription. Further results showed that, after the inhibition of Pitx1 in tendon cells, CRABP2 acetylation increased, the nuclear import of CRABP2 was enhanced, and the expression of RARβ2 increased. After the inhibition of Pitx1, RARβ2 expression was further increased by RA treatment in tendon cells. In the presence of retinoic acid, the expression of Pitx1 was inhibited in tendon cells.

Conclusions

Pitx1 binds to the promoter region of SIRT1 and promotes the transcription of SIRT1. Positive feedback occurs between RA signaling and Pitx1.

Poor Evertor Muscle Activity Is a Predictor of Recurrence in Idiopathic Clubfoot Treated by the Ponseti Method: A Prospective Longitudinal Study With a 5-Year Follow-up

BACKGROUND

After successful primary correction of the deformity in idiopathic clubfoot with the Ponseti method, recurrence has been reported to affect up to 40% of children. So far, it has been difficult to predict which feet are at risk of recurrence, despite numerous studies investigating various potential risk factors. The foot abduction brace (FAB) has been the standard of care in preventing recurrence but, even with excellent compliance, recurrences still occur. Increasingly, evidence points to a congenital neuromuscular imbalance constituting the deforming forces present in clubfoot. Poor evertor muscle activity has been cited specifically as a potential risk factor for recurrence. The aim of this study is to evaluate whether poor evertor muscle activity on clinical examination can predict recurrence in idiopathic clubfoot at 5-year follow-up.

METHODS

Data were collected prospectively on patients treated at our tertiary physiotherapy-led Ponseti service between 2010 and 2015. Hospital ethical approval was obtained. Sex, age, laterality, Pirani score, number of casts, brace compliance, and evertor activity were recorded. Evertor muscle activity was scored in a semiquantitative repeatable manner: 0, 0.5, or 1 as previously described. Recurrence was defined as deterioration of any of the 4 components of the deformity following a previously complete correction.

RESULTS

In total, 104 patients (172 feet) were included in the study, 76 patients had good evertor activity, and 28 demonstrated poor evertor activity. The mean follow up was 62 months (range, 41 to 71 mo); 18.3% of the patients (19/104) had recurrence treated with repeat casting; 13.5% (14/104) of the patients required additional surgery following recasting. Recurrence was highly associated with poor evertor activity (P<0.01).

CONCLUSIONS

Results at 5 years confirm that a semiquantitative evertor muscle activity assessment can predict recurrence and should be added to the routine clinical assessment in order to assist with individualizing patient's treatment strategies.

LEVEL OF EVIDENCE

Level II.

Evaluation of a simple tool to assess the results of Ponseti treatment for use by clubfoot therapists: a diagnostic accuracy study

Background

We aimed to develop and evaluate a tool for clubfoot therapists in low resource settings to assess the results of Ponseti treatment of congenital talipes equinovarus, or clubfoot, in children of walking age.

Method

A literature review and a Delphi process based on the opinions of 35 Ponseti trainers in Africa were used to develop the Assessing Clubfoot Treatment (ACT) tool and score. We followed up children with clubfoot from a cohort treated between 2011 and 2013, in 2017. A full clinical assessment was conducted to decide if treatment was successful or if further treatment was required. The ACT score was then calculated for each child. Inter-observer variation for the ACT tool was assessed. Sensitivity, specificity, positive and negative predictive values were calculated for the ACT score compared to full clinical assessment (gold standard). Predictors of a successful outcome were explored.

Results

The follow up rate was 31.2% (68 children). The ACT tool consisted of 4 questions; each scored from 0 to 3, giving a total from 0 to 12 where 12 is the ideal result. The 4 questions included one physical assessment and three parent reported outcome measures. It took 5 min to administer and had excellent inter-observer agreement.

An ACT score of 8 or less demonstrated 79% sensitivity and 100% specificity in identifying children that required further intervention, with a positive predictive value of 100% and negative predictive value of 90%. Children who completed two or more years of bracing were four times more likely to achieve an ACT score of 9 or more compared to those who did not (OR: 4.08, 95% CI: 1.31–12.65, p = 0.02).

Conclusions

The ACT tool is simple to administer, had excellent observer agreement, and good sensitivity and specificity in identifying children who need further intervention. The score can be used to identify those children who definitely need referral and further treatment (score 8 or less) and those with a definite successful outcome (score 11 or more), however further discrimination is needed to decide how to manage children with a borderline ACT score of 9 or 10.

Level of evidence

Level II, Diagnostic Study.

Electronic supplementary material

The online version of this article (10.1186/s13047-019-0323-4) contains supplementary material, which is available to authorized users.

Clinical outcomes and risk-factor analysis of the Ponseti Method in a low-resource setting: Clubfoot care in Haiti

Purpose

The Ponseti Method has dramatically altered the management of clubfoot, with particular implications for limited-resource settings. We sought to describe outcomes of care and risk factors for sub-optimal results using the Ponseti Method in Haiti.

Methods

We conducted a records review of patients presenting from 2011–2015 to a CURE Clubfoot clinic in Port-au-Prince, Haiti. We report patient characteristics (demographics and clinical), treatment patterns (cast number/duration and tenotomy rates), and outcomes (relapse and complications). We compared treatment with benchmarks in high-income nations and used generalized linear models to identify risk factors for delayed presentation, increased number of casts, and relapse.

Results

Amongst 168 children, age at presentation ranged from 0 days (birth) to 4.4 years, 62% were male, 35% were born at home, 63% had bilateral disease, and 46% had idiopathic clubfeet. Prior treatment (RR 6.33, 95% CI 3.18–12.62) was associated with a higher risk of delayed presentation. Risk factors for requiring ≥ 10 casts included having a non-idiopathic diagnosis (RR 2.28, 95% CI 1.08–4.83) and higher Pirani score (RR 2.78 per 0.5 increase, 95% CI 1.17–6.64). Female sex (RR 1.54, 95% CI 1.01–2.34) and higher Pirani score (RR 1.09 per 0.5 increase, 95% CI 1.00–1.17) were risk factors for relapse. Compared to North American benchmarks, children presented later (median 4.1 wks [IQR 1.6–18.1] vs. 1 wk), with longer casting (12.5 wks [SD 9.8] vs. 7.1 wks), and higher relapse (43% vs. 22%).

Conclusions

Higher Pirani score, prior treatment, non-idiopathic diagnosis, and female sex were associated with a higher risk of sub-optimal outcomes in this low-resource setting. Compared to high-income nations, serial casting began later, with longer duration and higher relapse. Identifying patients at risk for poor outcomes in a low-resource setting can guide counseling, program development, and resource allocation.

The top 100 most-cited articles on 'Clubfoot'

Clubfoot is an important aspect of pediatric orthopedics and is a readily prevalent condition presenting to orthopedic clinics worldwide. To identify landmark articles and important contributions to this field, we sought to do a citation analysis of the top 100 most-cited articles on clubfoot. Using the Scopus database and the search strategy 'Clubfoot', 'Clubfeet' OR 'Talipes Equinovarus', we identified 5753 articles. After filtering for relevant articles, the top 100 cited articles on clubfoot were retrieved for descriptive and statistical analysis. The most cited paper was 'Long-term results of treatment of congenital clubfoot' by S.J. Laaveg and I.V. Ponseti with 358 citations. The publication years ranged from 1969 to 2011. The USA was the most productive country in terms of research output, followed by the UK. Institution-wise, the University of Iowa contributed the most in terms of number of publications. The Journal of Pediatric Orthopaedics held the most number of articles. Most publications were level IV and level V studies. Although citation analysis has it flaws, this is a comprehensive list of the top 100 articles significantly affecting literature on clubfoot. On the basis our study, we conclude that there is marked deficiency of high-level articles with respect to the number of citations, and future researches need to cater to this question to produce high-quality studies.

Incidence of congenital idiopathic clubfoot in the Netherlands

The incidence of clubfoot patients is an important factor for centralization of care. Medical records of 21 accredited clubfoot centers were selected using the diagnosis treatment codes and checked to confirm diagnosis. All idiopathic clubfoot cases born during 2013-2014 were analyzed with respect to sex, affected foot, regional distribution, and seasonal variation. Among the 346 522 live births, 377 idiopathic clubfoot cases were registered. The incidence of the congenital idiopathic clubfoot in the Netherlands during 2013 and 2014 was 1.09 per 1000 live births, indicating that every year, ~200 children with one or two clubfeet are born in the Netherlands. On the basis of this finding, we can start to refine clubfoot care.

Clubfoot treatment in 2015: a global perspective

Introduction

Clubfoot affects around 174 000 children born annually, with approximately 90% of these in low-income and middle-income countries (LMIC). Untreated clubfoot causes life-long impairment, affecting individuals’ ability to walk and participate in society. The minimally invasive Ponseti treatment is highly effective and has grown in acceptance globally. The objective of this cross-sectional study is to quantify the numbers of countries providing services for clubfoot and children accessing these.

Method

In 2015–2016, expected cases of clubfoot were calculated for all countries, using an incidence rate of 1.24/1000 births. Informants were sought from all LMIC, and participants completed a standardised survey about services for clubfoot in their countries in 2015. Data collected were analysed using simple numerical analysis, country coverage levels, trends over time and by income group. Qualitative data were analysed thematically.

Results

Responses were received from 55 countries, in which 79% of all expected cases of clubfoot were born. More than 24 000 children with clubfoot were enrolled for Ponseti treatment in 2015. Coverage was less than 25% in the majority of countries. There were higher levels of response and coverage within the lowest income country group. 31 countries reported a national programme for clubfoot, with the majority provided through public–private partnerships.

Conclusion

This is the first study to describe global provision of, and access to, treatment services for children with clubfoot. The numbers of children accessing Ponseti treatment for clubfoot in LMIC has risen steadily since 2005. However, coverage remains low, and we estimate that less than 15% of children born with clubfoot in LMIC start treatment. More action to promote the rollout of national clubfoot programmes, build capacity for treatment and enable access and adherence to treatment in order to radically increase coverage and effectiveness is essential and urgent in order to prevent permanent disability caused by clubfoot.

Indicators to assess the functionality of clubfoot clinics in low-resource settings: a Delphi consensus approach and pilot study

Background

This study aims to determine the indicators for assessing the functionality of clubfoot clinics in a low-resource setting.

Methods

The Delphi method was employed with experienced clubfoot practitioners in Africa to rate the importance of indicators of a good clubfoot clinic. The consistency among the participants was determined with the intraclass correlation coefficient. Indicators that achieved strong agreement (mean≥9 [SD <1.5]) were included in the final consensus definition. Based on the final consensus definition, a set of questions was developed to form the Functionality Assessment Clubfoot Clinic Tool (FACT). The FACT was used between February and July 2017 to assess the functionality of clinics in the Zimbabwe clubfoot programme.

Results

A set of 10 indicators that includes components of five of the six building blocks of a health system-leadership, human resources, essential medical equipment, health information systems and service delivery-was produced. The most common needs identified in Zimbabwe clubfoot clinics were a standard treatment protocol, a process for surgical referrals and a process to monitor dropout of patients.

Conclusions

Practitioners had good consistency in rating indicators. The consensus definition includes components of the World Health Organization building blocks of health systems. Useful information was obtained on how to improve the services in the Zimbabwe clubfoot programme.

The etiology of idiopathic congenital talipes equinovarus: a systematic review

Background

Also known as clubfoot, idiopathic congenital talipes equinovarus (ICTEV) is the most common pediatric deformity and occurs in 1 in every 1000 live births. Even though it has been widely researched, the etiology of ICTEV remains poorly understood and is often described as being based on a multifactorial genesis. Genetic and environmental factors seem to have a major role in the development of this disease. Thus, the aim of this review is to analyze the available literature to document the current evidence on ICTEV etiology.

Methods

The literature on ICTEV etiology was systematically reviewed using the following inclusion criteria: studies of any level of evidence, reporting clinical or preclinical results, published in the last 20 years (1998–2018), and dealing with the etiology of ICTEV.

Results

A total of 48 articles were included. ICTEV etiology is still controversial. Several hypotheses have been researched, but none of them are decisive. Emerging evidence suggests a role of several pathways and gene families associated with limb development (HOX family; PITX1-TBX4), the apoptotic pathway (caspases), and muscle contractile protein (troponin and tropomyosin), but a major candidate gene has still not been identified. Strong recent evidence emerging from twin studies confirmed major roles of genetics and the environment in the disease pathogenesis.

Conclusions

The available literature on the etiology of ICTEV presents major limitations in terms of great heterogeneity and a lack of high-profile studies. Although many studies focus on the genetic background of the disease, there is lack of consensus on one or multiple targets. Genetics and smoking seem to be strongly associated with ICTEV etiology, but more studies are needed to understand the complex and multifactorial genesis of this common congenital lower-limb disease.

Systematic review and meta-analysis of global birth prevalence of clubfoot: a study protocol

INTRODUCTION

Clubfoot is a common congenital birth defect, with an average prevalence of approximately 1 per 1000 live births, although this rate is reported to vary among different countries around the world. If it remains untreated, clubfoot causes permanent disability, limits educational and employment opportunities, and personal growth. The aim of this systematic review and meta-analysis is to estimate the global birth prevalence of congenital clubfoot.

METHODS AND ANALYSIS

Electronic databases including MEDLINE, Cumulative Index to Nursing and Allied Health Literature (CINAHL), Embase, Global Health, Latin American & Caribben Health Science Literature (LILACS), Maternity and Infant Care, Web of Science, Scopus and Google Scholar will be searched for observational studies based on predefined criteria and only in English language from inception of database in 1946 to 10 November 2017. A standard data extraction form will be used to extract relevant information from included studies. The Joanna Briggs Institute appraisal checklist will be used to assess the overall quality of studies reporting prevalence. All included studies will be assessed for risk of bias using a tool developed specifically for prevalence studies. Forest plots will be created to understand the overall random effects of pooled estimates with 95% CIs. An I2 test will be done for heterogeneity of the results (P>0.05), and to identify the source of heterogeneity across studies, subgroup or meta-regression will be used to assess the contribution of each variable to the overall heterogeneity. A funnel plot will be used to identify reporting bias, and sensitivity analysis will be used to assess the impact of methodological quality, study design, sample size and the impact of missing data.

ETHICS AND DISSEMINATION

This review will be conducted completely based on published data, so approval from an ethics committee or written consent will not be required. The results will be disseminated through a peer-reviewed publication and relevant conference presentations.

PROSPERO REGISTRATION NUMBER

CRD42016041922.

Assessment of success of the Ponseti method of clubfoot management in sub-Saharan Africa: a systematic review

Background

Clubfoot is one of the most common congenital deformities affecting mobility. It leads to pain and disability if untreated. The Ponseti method is widely used for the correction of clubfoot. There is variation in how the result of clubfoot management is measured and reported. This review aims to determine and evaluate how success with the Ponseti method is reported in sub-Saharan Africa.

Methods

Five databases were examined in August 2017 for studies that met the inclusion criteria of: (1) evaluation of the effect of clubfoot management; (2) use of the Ponseti method; (3) original study undertaken in sub-Saharan Africa; (4) published between 2000 and 2017. We used the PRISMA statement to report the scope of studies. The included studies were categorised according to a hierarchy of study methodologies and a 27-item quality measure identified methodological strengths and weaknesses. The definition of success was based on the primary outcome reported.

Results

Seventy-seven articles were identified by the search. Twenty-two articles met the inclusion criteria, of which 14 (64%) reported a primary outcome. Outcomes were predominantly reported though case series and the quality of evidence was low. Clinical assessment was the most commonly reported outcome measure and few studies reported long-term outcome. The literature available to assess success of clubfoot management is characterised by a lack of standardisation of outcomes, with different measures reporting success in 68% to 98% of cases.

Conclusion

We found variation in the criteria used to define success resulting in a wide range of results. There is need for an agreed definition of good outcome (successful management) following both the correction and the bracing phases of the Ponseti method to establish standards to monitor and evaluate service delivery.

Electronic supplementary material

The online version of this article (10.1186/s12891-017-1814-8) contains supplementary material, which is available to authorized users.

Ponseti method in the management of clubfoot under 2 years of age: A systematic review

BACKGROUND

Congenital talipes equinovarus (CTEV), also known as clubfoot, is common congenital orthopedic foot deformity in children characterized by four components of foot deformities: hindfoot equinus, hindfoot varus, midfoot cavus, and forefoot adduction. Although a number of conservative and surgical methods have been proposed to correct the clubfoot deformity, the relapses of the clubfoot are not uncommon. Several previous literatures discussed about the technical details of Ponseti method, adherence of Ponseti protocol among walking age or older children. However there is a necessity to investigate the relapse pattern, compliance of bracing, number of casts used in treatment and the percentages of surgical referral under two years of age for clear understanding and better practice to achieve successful outcome without or reduce relapse. Therefore this study aims to review the current evidence of Ponseti method (manipulation, casting, percutaneous Achilles tenotomy, and bracing) in the management of clubfoot under two years of age.

MATERIALS AND METHODS

Articles were searched from 2000 to 2015, in the following databases to identify the effectiveness of Ponseti method treatment for clubfoot: Medline, Cumulative Index to Nursing and Allied Health Literature (CINHAL), PubMed, and Scopus. The database searches were limited to articles published in English, and articles were focused on the effectiveness of Ponseti method on children with less than 2 years of age.

RESULTS

Of the outcome of 1095 articles from four electronic databases, twelve articles were included in the review. Pirani scoring system, Dimeglio scoring system, measuring the range of motion and rate of relapses were used as outcome measures.

CONCLUSIONS

In conclusion, all reviewed, 12 articles reported that Ponseti method is a very effective method to correct the clubfoot deformities. However, we noticed that relapses occur in nine studies, which is due to the non-adherence of bracing regime and other factors such as low income and social economic status.