Research Appraisals
Evidence-based critical appraisals of the latest medical research, systematically evaluated using Oxford CEBM methodology.
Showing 13 appraisals
Clinical oral investigations
Exploring orofacial myofunctional therapy and its core components in mixed-dentition anterior open bite: the ombit study
OBJECTIVES: To explore the therapeutic effects of OMT in children with AOB in the mixed dentition phase, including a reduced form of OMT (focusing exclusively on breathing pattern and resting postures; OMTBPO) and traditional OMT (also including strength training and correction of swallowing; OMTBPSS). MATERIALS AND METHODS: In this double-baseline, longitudinal study, eight children with AOB (mean age 8.1 years old) were randomly allocated to the OMTBPO (n = 4) or OMTBPSS group (n = 4). Each participant received 7.5 h of OMT across 10 sessions. Outcomes included occlusal parameters, Photographic Open bite Severity Index (POSI) and Peer Assessment Rating (PAR) using 3D intraoral scans, orofacial function based on clinical and standardized assessment (Orofacial Myofunctional Evaluation with Scores; OMES), strength and endurance measurements, and oral health-related quality of life (child oral health impact profile - ortho; COHIP-ortho). RESULTS: Immediately post-therapy, anterior tongue strength had significantly increased in the full sample. At three-month follow-up, palatal volume, lateral lip endurance, and OMES function and deglutition scores had significantly increased, and vertical overbite had decreased. The PAR index showed a significant proportional reduction of 35% from baseline to the last follow-up moment (on average 6 months after therapy). The OMTBPO group showed significantly lower rates of atypical tongue posture and interdental articulation at six-month follow-up. CONCLUSION AND CLINICAL RELEVANCE: This study took a first step in exploring the effectiveness of OMT components in mixed-dentition AOB. Measurable short- to mid-term functional and occlusal improvements were found, and comparable outcomes between protocols suggest that posture-focused OMT may be an efficient interceptive approach. Further research including randomized controlled trials with larger sample sizes is required to provide evidence on efficacy and long-term stability.
1 June 2026
Read appraisal →The Cochrane database of systematic reviews
Gastrostomy plus fundoplication or gastro-jejunal tube or gastrostomy alone for treating or preventing gastro-esophageal reflux in children and adolescents with neurological impairment
RATIONALE: Children with neurological impairment (NI) represent a vulnerable pediatric population who often experience multiple co-occurring chronic conditions and may develop worsening comorbidities over time due to primary dysfunctions of the nervous system. Among the most significant of these are gastro-esophageal reflux (GER) and dysphagia, which likely account for much of the associated morbidity and mortality. There is substantial variation in the management of GER, and few studies have been conducted to evaluate the effects of antireflux procedures in preventing and improving outcomes in this population. OBJECTIVES: To assess the benefits and harms of the two most common enteral feeding tubes and associated antireflux procedures. We aimed to compare: 1) gastrostomy tube (GT) plus fundoplication, 2) gastrostomy plus insertion of a gastro-jejunal (GJ) tube, and 3) GT alone for treating or preventing GER in children and adolescents with NI. SEARCH METHODS: We searched CENTRAL, MEDLINE, Embase, six other databases, and two trials registers, together with reference checking and contact with two experts in the field, to identify studies for inclusion in the review. There were no restrictions on language. The latest search date was 17 September 2024. ELIGIBILITY CRITERIA: Randomized controlled trials (RCTs) and non-randomized studies of interventions (NRSIs) in children with NI, with or without GER, comparing the three interventions. We excluded studies of neurologically normal children. OUTCOMES: Our critical outcomes were symptoms of GER and mortality. Important outcomes included major surgical complications (perforation or peritonitis), length of stay (LOS), number of hospitalizations for respiratory morbidity (pneumonia), number of emergency department (ED) visits, and child's quality of life (QoL). RISK OF BIAS: We used the ROBINS-I tool to assess bias in NRSIs. We did not find any RCTs. SYNTHESIS METHODS: We meta-analyzed the results for each outcome where possible (inverse-variance, random-effects). Where this was precluded by the nature of the data, we synthesized results according to Synthesis Without Meta-analysis (SWiM) guidelines. We used GRADE to assess the certainty of evidence. INCLUDED STUDIES: We included 11 NRSIs with a total of 3122 children with NI. Among these, seven cohort studies compared GT plus fundoplication versus GT alone (2654 participants); one cohort study compared GJ tubes versus GT alone (50 participants); and three cohort studies compared GT plus fundoplication versus GJ tubes (418 participants). SYNTHESIS OF RESULTS: GT plus fundoplication compared to GT alone for GER in children with NI The evidence is very uncertain about the effect of GT plus fundoplication on symptoms of GER (odds ratio [OR] 2.02, 95% confidence interval [CI] 0.64 to 6.44; 3 NRSIs, 180 participants; very low-certainty evidence); mortality (OR 2.62, 95% CI 0.41 to 16.80; 3 NRSIs, 415 participants; very low-certainty evidence); major surgical complications (OR 2.61, 95% CI 0.46 to 14.87; 3 NRSIs, 412 participants; very low-certainty evidence); and LOS (1 NRSI with no comparison, 130 participants; very low-certainty evidence). GT plus fundoplication may result in little to no difference in the number of hospitalizations for pneumonia (mean difference [MD] 0.04 higher, 95% CI 0.01 lower to 0.09 higher; 1 NRSI, 2054 participants; low-certainty evidence). The evidence is very uncertain about the effect of GT plus fundoplication on the number of ED visits (OR 1.82, 95% CI 0.78 to 4.27; 1 NRSI, 130 participants; very low-certainty evidence). Child's QoL was not reported. GJ tubes compared to GT alone for GER in children with NI The evidence is very uncertain about the effect of GJ tubes on mortality (OR 5.38, 95% CI 0.40 to 73.09; 1 NRSI, 50 participants; very low-certainty evidence) and child's QoL (effect estimate not reported; no effect of the type of tube on quality of life; 1 prospective NRSI, 50 participants; very low-certainty evidence). Symptoms of GER, major surgical complications, LOS, number of hospitalizations for respiratory morbidity (pneumonia), and number of ED visits were not reported. GT plus fundoplication compared to GJ tubes for GER in children with NI The evidence is very uncertain about the effect of GT plus fundoplication on symptoms of GER (3 NRSIs with conflicting results, including 1 unmatched cohort, 1531 participants; very low-certainty evidence); mortality (OR 1.12, 95% CI 0.52 to 2.41; 3 NRSIs, 418 participants; very low-certainty evidence); major surgical complications (OR 2.84, 95% CI 0.45 to 17.82; 2 NRSIs, 190 participants; very low-certainty evidence); and LOS (1 NRSI with no comparison, 79 participants; very low-certainty evidence). GT plus fundoplication may result in little to no difference in the number of hospitalizations for pneumonia (MD 0.05 lower, 95% CI 0.21 lower to 0.11 higher; 1 NRSI, 228 participants; low-certainty evidence). Number of ED visits and child's QoL were not reported. We downgraded the certainty of evidence for risk of bias and imprecision. Most studies were at serious risk of bias due to confounding, except for hospitalizations for pneumonia for the comparisons of GT plus fundoplication versus GT alone and versus GJ tubes. AUTHORS' CONCLUSIONS: In children with NI, the evidence is very uncertain about the effect of GT plus fundoplication on symptoms of GER, mortality, major surgical complications, and LOS, when compared to GT alone or GJ tubes (very low-certainty evidence). GT plus fundoplication may result in little to no difference in the number of hospitalizations for pneumonia when compared to GT alone or GJ tubes (low-certainty evidence). The evidence is very uncertain about the effect of GT plus fundoplication on the number of ED visits when compared to GT alone (very low-certainty evidence). The evidence is very uncertain about the effect of GJ tubes on mortality and child's QoL when compared to GT alone (very low-certainty evidence). We found no RCTs, and our results should be interpreted with caution due to the limited number of studies and the limitations of NRSIs. Additional research is necessary. It is likely that RCTs will be difficult to conduct; however, better-designed NRSIs could improve the quality of evidence in this area. FUNDING: This review was funded by Foundation Fresno, Universidad Católica de Chile, for librarian support only. The foundation had no role in the design or conduct of this review. REGISTRATION: Protocol available via DOI: 10.1002/14651858.CD015007.
21 May 2026
Read appraisal →Angewandte Chemie (International ed. in English)
A Novel Acetylcholine Nanosensor for Single Vesicle Storage and Sub-Quantal Exocytosis in Living Neurons and Organoids
Acetylcholine (ACh) is a critical neurotransmitter that regulates diverse physiological functions, such as cognition and muscle contraction, through synaptic transmission. However, in situ quantitative chemical analysis of single-vesicle storage and release dynamics at single-cell level remains a major technical challenge, hindering mechanistic understanding of cholinergic synaptic plasticity across physiological and pathological states. To address this, we developed an Ti3C2Tx MXene/enzyme-functionalized (M@E@CF) nanosensor, enabling real-time monitoring of vesicular ACh storage and exocytotic release in primary cholinergic neurons and human spinal cord organoids. Our findings reveal a sub-quantal release mode in both mouse and human-derived neurons. To further elucidate the regulatory principles of exocytosis kinetics, we classified single-vesicle exocytosis patterns based on signal peak shapes using a 1D convolutional neural network (1D-CNN) deep learning model, uncovering significant differences in the number of released molecules and kinetic parameters across modes. Critically, in Down syndrome models, we observed significantly reduced single vesicle ACh storage and release alongside an elevated release fraction, concurrent with shortened fusion pore durations during exocytosis. Thus, the M@E@CF nanosensor platform establishes a versatile tool for spatiotemporal investigation of neurotransmitter storage and release dynamics, providing a critical technical foundation for exploring physiological functions and pathological mechanisms of the cholinergic system.
13 May 2026
Read appraisal →Journal of chemical information and modeling
Examining Genetic Variants Associated with FOXP1 Syndrome through Molecular Dynamics of Its DNA-Binding Domain and Self-Organizing Maps
Genetic mutations in the transcription factor FOXP1 (forkhead box protein P1) cause an autosomal dominant neurodevelopmental disorder called FOXP1 syndrome. To understand the structural impact of pathogenic variants associated with FOXP1 syndrome, we investigated the conformational changes resulting from six distinct missense variants in FOXP1 by combining molecular dynamics simulations, molecular docking, and machine learning via self-organizing maps. Our results reveal different conformational landscapes mapped by the FOXP1 variants and reduced interactions with the DNA for mutations residing in helix H3 of the DNA-binding domain. These analyses offer a framework for assessing the structural impact of missense variants implicated in the FOXP1 syndrome, highlighting the importance of structural inferences in interpreting genetic variants.
13 May 2026
Read appraisal →American journal of speech-language pathology
Parental Roles in Language Intervention: A Systematic Review
BACKGROUND: Children with language delays (LDs) or language disorders face persistent challenges in their development. Speech and language therapy is vital, and within it, parental involvement is recognized as a key factor in therapeutic success. Although many parent-implemented interventions exist, little is known about the specific roles parents assume, particularly across different diagnostic groups: LD, developmental language disorder (DLD), and language disorder associated with other conditions (LD + X). OBJECTIVE: The aim of this study was to review and synthesize evidence on parental roles in language interventions for children with LD, DLD, and LD + X. METHOD: Following Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines and registered in PROSPERO (CRD42023452616), this systematic review analyzed studies from four databases. Eligible studies involved parent participatory language interventions reporting child language outcomes. Two independent reviewers conducted screening, quality appraisal, and data extraction. RESULTS: Across 37 studies, parents most frequently assumed the roles of Learner, Implementer, and Informer, highlighting their functions in acquiring knowledge, applying strategies, and providing feedback on children's progress. Less common roles included Adaptor and Collaborative Decision-Maker, suggesting that although caregivers are increasingly active, their engagement rarely extends to shared decision making with professionals. The studies reviewed here demonstrated considerable variability in intervention dosage, total duration, delivery format, and strategies taught. In contrast, less variability was observed in the identity of the parents/caregivers (most often the mother) and the trainer (typically a speech-language therapist) as well as in the type and mode of delivery. CONCLUSIONS: Parental engagement in language interventions continues to be largely determined by professional guidance, positioning parents as learners and implementers rather than full collaborators. Strengthening adaptive roles and promoting shared decision making can enhance family-centered practice. Future programs could consider the specific needs of each context, encourage parental involvement, and explore telepractice to expand access. SUPPLEMENTAL MATERIAL: https://doi.org/10.23641/asha.32060328.
11 May 2026
Read appraisal →Proceedings of the National Academy of Sciences of the United States of America
Cumulative access to print books improves literacy achievement: Evidence from a five-year randomized trial in high-poverty schools
For more than a century, studies have shown that children who grow up in homes with more books achieve higher levels of academic success, yet it remains unclear whether books themselves improve learning or simply reflect broader socioeconomic advantages. Skill-development theory holds that greater access to books directly improves literacy through increased print exposure and reading practice, whereas the cultural capital account suggests books are indicators of broader family resources, including parental education, academic norms, and enrichment opportunities, that promote achievement independently of the books themselves. To provide causal evidence, we conducted a school-level randomized controlled trial of a program that builds children's home libraries. In 2018, we randomly assigned 60 high-poverty public elementary schools to treatment or control groups. Students in 30 treatment schools received four book distributions over 5 y, averaging about seven books per distribution, and prominently including high-interest and culturally relevant titles; students in 30 control schools received none. Tracking students from 2018-19 through 2022-23, we find a statistically significant intention-to-treat impact on reading achievement of d = 0.100 and a larger d = 0.207 advantage for those completing the full 5-y program. These impacts correspond to approximately 25 to 32% and 52 to 65% of a typical year's learning, respectively. The largest benefits are concentrated among students who received books across all distributions, indicating that cumulative exposure drives the strongest impacts. These findings provide evidence supporting skill-development theory and highlight a scalable strategy for improving literacy outcomes in high-poverty urban schools.
26 Apr 2026
Read appraisal →Archives of disease in childhood. Fetal and neonatal edition
Intermittent hypoxia and caffeine in infants born preterm: the ICAF Randomized Clinical Trial
OBJECTIVE: To determine whether extending caffeine therapy through 43 weeks' postmenstrual age (PMA) decreases intermittent hypoxia (IH) in convalescing preterm infants. Secondary objectives were to assess caffeine effects on changes in inflammation-related plasma biomarkers and brain MRI. DESIGN: Multicentre masked randomised trial. SETTING: 16 US hospitals. PATIENTS: Infants at <30 weeks + 6 days gestational age on caffeine between 32 weeks and 36+5 days PMA in room air with routine caffeine discontinuation prior to 36 weeks +6 days. INTERVENTION: Randomisation to caffeine or placebo and treated through 42 completed weeks. Pulse oximetry was recorded from enrolment through 1 week after stopping study drug. Blood for 12 inflammation-related biomarkers obtained at enrolment and 38 weeks' PMA and brain imaging after enrolment or <3 days of randomisation, and study end. MAIN OUTCOME MEASURE: Seconds/hour of oxygen saturation <90% from randomisation to study end. RESULTS: Randomised 160 subjects, 78 placebo, 82 caffeine. IH was less at every PMA with caffeine treatment from 34 (172.7 (123.4, 241.7); 84.7 (64.4, 111.4, p<0.01) through 41 weeks (73.0 (51.3, 103.7); 26.6 (18.5, 38.2, p<0.001). Adjusted TNF-α levels were 23% lower at follow-up in the caffeine group compared with placebo (p<0.02), without other biomarker differences. Paired brain imaging found no significant differences. CONCLUSIONS: Extended caffeine reduced the burden of IH in very preterm infants and may reduce inflammation. Further study is needed to determine if this effect of caffeine is associated with reduced risk of adverse outcomes. TRIAL REGISTRATION NUMBER: NCT03321734.
19 Apr 2026
Read appraisal →Journal of speech, language, and hearing research : JSLHR
Rhotic Generalization Is More Rapid in Biofeedback Than Motor-Based Treatment for Residual Speech Sound Disorder: Secondary Outcomes of a Randomized Controlled Trial
PURPOSE: This study examined the effects of visual biofeedback approaches and nonbiofeedback motor-based treatment on generalization outcomes following speech therapy for children with residual speech sound disorders (RSSDs). METHOD: A total of 108 children aged 9-15 years with RSSD affecting American English /ɹ/ were randomly assigned to receive 19 motor-based speech treatment sessions, with or without visual biofeedback (divided into ultrasound or visual-acoustic biofeedback). The treatment included practice designed to implement several motor learning principles, with task difficulty systematically adjusted based on the child's performance. Children's /ɹ/ accuracy on untreated words before and after treatment was rated as correct or incorrect by lay listeners who were blinded to participant characteristics, treatment conditions, and time points. RESULTS: The mixed-effects regression model revealed a statistically significant interaction between treatment type and time point. Specifically, both the biofeedback and nonbiofeedback motor-based treatment groups made progress over time, but the amount of generalization to untreated words was significantly greater in the biofeedback condition than in the motor-based treatment. In a subanalysis comparing biofeedback types, greater generalization was observed following ultrasound biofeedback than visual-acoustic biofeedback, although this effect was strongest at one treatment site. DISCUSSION: This randomized controlled trial found that adding biofeedback to motor-based treatment can increase the rate of accurate production of the American English /ɹ/ in untreated words.
12 Apr 2026
Read appraisal →HGG advances
Gene-specific pathogenicity predictor for chromatin remodeling BAF complex-associated neurodevelopmental disorders
Advancements in whole-genome sequencing have increased the number of variants of uncertain significance (VUS) identified in human genomes. This has created a diagnostic bottleneck for genetic counselors tasked with sifting through these variants and determining those most likely to be causative for a patient's clinical presentation. Machine learning (ML) tools can aid in identifying pathogenic variants from VUS, but there is a need for gene-specific algorithms that predict pathogenic variants with high accuracy. To address this need, we present a workflow for developing gene-specific, ensemble-learning ML tools, that leverage outputs from other algorithms, locations of variants within the gene, and evolutionary conservation data to make a prediction of pathogenicity. Variants in SMARCA2 and SMARCA4 that are associated with rare neurodevelopmental diseases were used to screen 15 ML algorithms. A random forest learner was tuned to yield a final accuracy of 0.93 on holdout data. Generalizing this predictor to other BRG1/BRM-associated factor (BAF) complex proteins resulted in a sharp decline in performance. We trained a final predictor for all genes in the study to create a predictor that identifies pathogenic variants in these BAF subunits with an accuracy of 0.91 on holdout data. This predictor specific to BAF complex proteins performs with higher accuracy and area under the precision-recall curve than any other predictor. The decline in performance when generalized to other proteins emphasizes the need for the gene-specific calibration of predictors. Our workflow for the development of such models provides a quick, computationally inexpensive route for improving the ML tools available to genetic counselors.
12 Apr 2026
Read appraisal →Journal of speech, language, and hearing research : JSLHR
Information Load Predicts Stuttering Events
PURPOSE: One potential contributor to the variability of stuttering events is information load, quantified by assessing word predictability based on preceding context. This study investigated whether words with greater information load are more likely to be stuttered using word surprisal as an index while controlling for relevant linguistic variables. We also examined whether this relationship varied with stuttering severity and impact. METHOD: We analyzed spontaneous speech samples from 35 adults who stutter, drawn from the FluencyBank corpus. Word surprisal values were computed using the Generative Pretrained Transformer 2 large language model and analyses controlled for six linguistic predictors of stuttering. We also tested whether clinical measures of stuttering severity and overall impact predicted individuals' sensitivity to surprisal. RESULTS: Higher word surprisal significantly increased the likelihood of stuttering, even after controlling for linguistic covariates. However, we found no evidence that stuttering severity or overall impact moderated this relationship. CONCLUSIONS: These findings suggest that words with greater information load are more likely to elicit stuttering during spontaneous speech. This pattern may reflect increased communicative demands associated with high-surprisal words. The absence of a moderating effect of stuttering severity or impact may indicate that individual differences in coping with communicative pressure, rather than clinical severity alone, shape stuttering variability.
11 Apr 2026
Read appraisal →Journal of speech, language, and hearing research : JSLHR
Rhotic Acquisition Is More Rapid in Biofeedback Than Motor-Based Treatment for Residual Speech Sound Disorder: Primary Outcome of a Randomized Controlled Trial
PURPOSE: Residual speech sound disorder (RSSD) is a high-prevalence condition that can limit children's academic and social participation, with negative consequences for overall well-being. Previous studies have described visual biofeedback as a promising option for RSSD, but results have been inconclusive due to study design limitations and small sample sizes. METHOD: In a preregistered randomized controlled trial, 108 children aged 9-15 years with RSSD affecting American English /ɹ/ were randomly assigned to receive treatment incorporating visual biofeedback (subdivided into ultrasound and visual-acoustic types) or a comparison condition of motor-based treatment consistent with current best practices in speech therapy. An acoustic measure (the distance between the second and third formants, which is smaller in perceptually accurate /ɹ/) was used to quantify progress in the first three sessions of treatment in participants' assigned condition. The focus on the early stages of treatment was grounded in principles of motor learning: As a type of knowledge of performance feedback, biofeedback is expected to have its greatest impact during initial acquisition of a new speech-motor plan. RESULTS: A linear mixed-effects regression model revealed a statistically significant interaction between treatment type and session: While both groups made progress over time, the rate of progress was significantly faster in the biofeedback condition compared to motor-based treatment. No statistically significant difference was observed between the ultrasound and visual-acoustic types of biofeedback. DISCUSSION: This large-scale randomized controlled trial supports previous small-scale research in finding that biofeedback can help children with RSSD acquire American English /ɹ/. A companion study will compare participants' generalization learning after the end of all treatment. SUPPLEMENTAL MATERIAL: https://doi.org/10.23641/asha.29971501.
11 Apr 2026
Read appraisal →Scientific reports
SPG601-associated modulation of resting-state EEG and improvement in executive function in a fragile X syndrome randomized controlled crossover study
Fragile X syndrome (FXS) is the most common inherited cause of intellectual disability and autism spectrum disorder. Despite extensive research, no targeted treatments exist for the core symptoms of FXS. SPG601 represents the first BK channel activator to enter clinical testing for FXS, designed to restore synaptic function by correcting specific ion channel dysfunction downstream of fragile X messenger ribonucleoprotein protein (FMRP) loss. We conducted a randomized, double-blind, placebo-controlled, 2-period balanced crossover study in 10 adult men with genetically confirmed full-mutation fragile X syndrome. Participants received single doses of SPG601 800 mg and placebo separated by a 1-week washout period. Given the first in FXS nature of the study, the safety and tolerability of SPG601 were evaluated as a primary outcome. Additional endpoints included resting-state EEG power spectral density analysis across predefined frequency bands and auditory-evoked gamma oscillations combined with cognitive assessments using validated instruments and clinical global impressions scales. Among EEG measurements, excessive high frequency gamma band activity has been most extensively validated as a biomarker across species in FXS and has demonstrated correlation with severity of the human FXS phenotype and therefore served as the primary neurophysiologic endpoint. SPG601 was well tolerated with a favorable safety profile. SPG601 demonstrated significant modulation of resting-state EEG power spectral density compared to placebo. Significant treatment effects were observed for gamma power (F = 5.20, p = 0.023), alpha2 power (F = 17.43, p < 0.001), and theta power (F = 7.06, p = 0.008). SPG601 also significantly modulated aperiodic EEG slope (F = 5.28, p = 0.022), indicating alterations in the broadband 1/f component reflecting excitation-inhibition balance. Cognitive improvement was observed in the NIH Toolbox Flanker Inhibitory Control and Attention Test across multiple scoring metrics (p = 0.027). No significant effects were observed on auditory-evoked gamma measures. This study provides the first clinical evidence that SPG601 produces significant neurophysiological changes in FXS, accompanied by a cognitive enhancement in executive function.
10 Apr 2026
Read appraisal →Language, speech, and hearing services in schools
Intervention Efficacy for Children With Mild Bilateral Sensorineural Hearing Loss
PURPOSE: This study aimed to compare the efficacy of hearing aid (HA) and frequency modulation (FM) systems in improving language, articulation, and speech perception outcomes among children with mild bilateral sensorineural hearing loss (MBHL) over a 12-month intervention period. METHOD: A prospective repeated-measures design was employed, enrolling 43 Cantonese-speaking children aged 6-7 years, with a pure-tone average of 26-40 dB HL. Participants were randomly assigned to either the HA group (n = 16) or the FM group (n = 16). A nontreatment control group (n = 11) was formed from children who declined the intervention. The outcome measures included the Hong Kong Cantonese Articulation Test, the Hong Kong Cantonese Oral Language Assessment Scale, and the Cantonese Hearing-in-Noise Test. Assessments were conducted at baseline and 12 months post-intervention. RESULTS: The FM group demonstrated significant improvements in language abilities (p < .01, Cohen's d = 0.53), particularly in word definition, expressive vocabulary, and Cantonese grammar, outperforming both the HA and control groups (p < .05). Articulation improvements were greater in the FM group, with significant gains in consonant production (p < .01). No significant improvements were observed in speech perception across the groups. CONCLUSIONS: FM systems are more effective than HAs in enhancing language and articulation outcomes in children with MBHL, particularly in noisy classroom environments. These findings highlight the importance of individualized intervention strategies and the potential of FM systems to support auditory access and language development. Future research should explore long-term outcomes and the role of contextual factors in intervention efficacy.
5 Apr 2026
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