Prevalence and Therapy Rates for Stuttering, Cluttering, and Developmental Disorders of Speech and Language: Evaluation of German Health Insurance Data

Knowns and unknowns about the neurobiology of stuttering

Stuttering occurs in early childhood during a dynamic phase of brain and behavioral development. The latest studies examining children at ages close to this critical developmental period have identified early brain alterations that are most likely linked to stuttering, while spontaneous recovery appears related to increased inter-area connectivity. By contrast, therapy-driven improvement in adults is associated with a functional reorganization within and beyond the speech network. The etiology of stuttering, however, remains enigmatic. This Unsolved Mystery highlights critical questions and points to neuroimaging findings that could inspire future research to uncover how genetics, interacting neural hierarchies, social context, and reward circuitry contribute to the many facets of stuttering.

Effectiveness of Stuttering Modification Treatment in School-Age Children Who Stutter: A Randomized Clinical Trial

PURPOSE

This study investigated the effectiveness of the stuttering modification intervention Kinder Dürfen Stottern (KIDS) in school-age children who stutter.

METHOD

Seventy-three children who stutter were included in this multicenter, two-group parallel, randomized, wait-list controlled trial with a follow-up of 12 months. Children aged 7-11 years were recruited from 34 centers for speech therapy and randomized to either the immediate-treatment group or the 3 months delayed-treatment group. KIDS was provided by 26 clinicians who followed a treatment manual. Although the primary outcome measure was the impact of stuttering (Overall Assessment of the Speaker's Experience of Stuttering-School-Age [OASES-S]), the secondary outcomes included objective and subjective data on stuttering severity.

RESULTS

At 3 months postrandomization, the mean score changes of the OASES-S differed significantly between the experimental (n = 33) and control group (n = 29; p = .026). Furthermore, treatment outcomes up to 12 months were analyzed (n = 59), indicating large effects of time on the OASES-S score (p < .001, partial η2 = .324). This was paralleled by significant improvements in parental ratings and objective ratings (stuttering severity, frequency, and physical concomitants).

CONCLUSIONS

The significant short-term treatment effects in the OASES-S are in line with the (initial) focus of KIDS on cognitive and affective aspects of stuttering. Over 12 months, these changes were maintained and accompanied by behavioral improvements. The results suggest that individual treatment with KIDS is an adequate treatment option for this age group.

SUPPLEMENTAL MATERIAL

https://doi.org/10.23641/asha.24207864.

Cost of Illness and Health-Related Quality of Life for Stuttering: Two Systematic Reviews

PURPOSE

For those who stutter, verbal communication is typically compromised in social situations. This may attract negative responses from listeners and stigmatization by society. These have the potential to impair health-related quality of life across a range of domains, including qualitative and quantitative impacts on speech output, mental health issues, and failure to attain educational and occupational potential. These systematic reviews were designed to explore this matter using traditional health economics perspectives of utility measures and cost of illness.

METHOD

Studies were included if they involved children, adolescents, or adults with stuttering as a primary diagnosis. The quality of life search strategy identified 2,607 reports, of which three were included in the quality of life analysis. The cost of illness search strategy identified 3,778 reports, of which 39 were included in the cost of illness analysis.

RESULTS

Two of the three studies included in the quality of life analysis had a high risk of bias. When measured using utility scores, quality of life for people who stutter was in the range of those reported for chronic health conditions such as diabetes mellitus, cardiovascular disease, and cancer. However, there is little such evidence of quality of life impairment during the preschool years. Studies included in the cost of illness analysis carried considerable risk of bias overall.

CONCLUSIONS

For people who stutter, there are substantive direct and indirect costs of illness. These include impairment, challenges, and distress across many domains throughout life, including income, education, employment, and social functioning. Evidence of quality of life impairment using utility measures is extremely limited. If this situation is not remedied, the lifetime impairment, challenges, and distress experienced by those who stutter cannot be documented in a form that can be used to influence health policy and health care spending.

SUPPLEMENTAL MATERIAL

https://doi.org/10.23641/asha.24168201.

There is more to cluttering than meets the eye: The prevalence of cluttering and association with psychological well-being indices in an undergraduate sample

BACKGROUND

Cluttering is a fluency disorder characterized by an abnormally fast or irregular speech delivery rate along with disfluencies that are frequent but are not judged to be stuttering. Data on cluttering prevalence in the general population are scarce, as well as its association with psychological well-being indices, such as anxiety, and depressive symptoms.

AIMS

To estimate cluttering prevalence among undergraduates, as well as its relationship with psychological and well-being indicators.

METHODS & PROCEDURES

To address these issues, a large sample (n = 1582) of undergraduates completed a questionnaire that provided a lay definition of cluttering and were asked to identify themselves as clutterers (SI-Clut), as well as to indicate the presence of several psychological and mental well-being indices.

OUTCOMES & RESULTS

A total of 276 respondents (23%) self-identified as clutterers (now or in the past), with 55.1% of those being male. Only 56 respondents (3.5% of the total sample; about 21% of SI-Clut) reported having received speech therapy for cluttering. Relative to students self-identifying as non-clutterers, self-identification of cluttering was associated with higher levels of psychosomatic symptoms, depressive symptoms and stress, indicating a tendency toward internalizing psychopathology, along with lower self-esteem, and lower subjective happiness.

CONCLUSIONS & IMPLICATIONS

The current findings point to the high prevalence of students self-identifying as clutterers, along with a significant link between cluttering and mental distress. Therefore, it is important to increase public awareness of cluttering, its diagnosis and treatment. From the clinical perspective, the elevated levels of somatic complaints, anxiety and depression may represent internalizing psychopathology, associated with more covert rather than overt symptomatology. Such symptom manifestation calls for special attention from the speech-language pathologists providing cluttering therapy, using designated well-being or mental health screening tools. Although data on standard cluttering treatment are limited, it should be customized to the client's unique difficulties. Speech-language pathologists' understanding of cluttering, which includes both speech characteristics as well as psychological and social aspects of well-being, may assist them in implementing effective treatments.

WHAT THIS PAPER ADDS

What is already known on the subject Cluttering is a fluency disorder characterized by an abnormally fast or irregular speech rate, along with various disfluencies and articulatory imprecision. It may co-occur with other disorders, such as learning disabilities, and attention-deficit/hyperactivity disorder. Data on cluttering prevalence and its association with psychological well-being indices, such as anxiety and depression, are limited. What this paper adds to existing knowledge A total of 276 undergraduates (23%) self-identified as clutterers, of whom 55.1% were males. A total of 56 respondents (3.5% of the total sample, and about 21% of undergraduates self-identified as clutterers) reported having received speech therapy for cluttering. Psychosomatic symptoms, depressive symptoms and stress levels were higher among these students, suggesting a tendency toward internalizing psychopathology, along with a lower sense of self-esteem and subjective happiness. What are the potential or actual clinical implications of this work? The high prevalence of students self-identifying as clutterers, along with the low percentage of respondents who received speech therapy for cluttering, emphasize the need to raise public awareness of the problem, its diagnosis and treatment (Reichel et al., 2010). The association between cluttering and mental distress requires speech-language pathologists to be aware that cluttering may have covert symptomatology, similar to stuttering, which should be addressed in therapy.

Stuttering Behavior in a National Age Cohort of Norwegian First-Graders With Down Syndrome

PURPOSE

The aims of this study were to investigate the occurrence of stuttering behavior across time and to evaluate the relationship between stuttering behavior and language ability in children with Down syndrome.

METHOD

A national age cohort of Norwegian first graders with Down syndrome (N = 75) participated in the study. Speech samples from a story-retelling task and a picture book dialogue as well as standardized measures of vocabulary, grammar, and nonverbal mental ability were collected at two time points approximately 5 months apart. Stuttering behavior was evaluated through counting stuttering-like disfluencies and stuttering severity ratings. The relationship between stuttering behavior and language ability was investigated through hierarchical regression analysis.

RESULTS

The participants had stuttering severity ratings ranging from no stuttering behavior to severe and displayed all types of stuttering-like disfluencies. There were significant relationships between stuttering behavior and language ability at the first time point, whereas the relationships were not significant at the second time point. The stuttering severity ratings were significantly predicted by language ability across time, whereas the frequency of stuttering-like disfluencies was not.

CONCLUSIONS

The occurrence of stuttering behavior was high across the measures and time points; however, the relationship between stuttering behavior and language ability varied across these variables. Thus, the nature of the relationship does not seem to follow a strict pattern that can be generalized to all children across time.

Stuttering interventions for children, adolescents, and adults: a systematic review as a part of clinical guidelines

INTRODUCTION

Stuttering may have a holistic effect on the quality of life of a person who stutters by limiting participation in social situations, resulting in feelings of isolation and frustration, leading to difficulties in education and employment and increasing the likelihood of mental health problems. Even young children who stutter may have negative experiences of speaking. Therefore, it is important to treat stuttering behavior effectively in both children and adults. The purpose of this paper was to systematically review group and case studies about the effectiveness of behavioral stuttering interventions to provide evidence-based guidelines for clinicians.

METHODS

Systematic data retrieval was conducted in four electronic databases (PsycINFO, CINAHL, PubMed, Cochrane). The assessment of search results was conducted according to predetermined inclusion and exclusion criteria by two independent judges. The methodological quality of each paper was assessed using strict criteria to include only high-quality research.

RESULTS

The search revealed 2293 results, and 38 papers (systematic reviews N=3, group design studies N=21 and case studies N=14) with acceptable methodological quality were included. The data show that there is most evidence about the treatment of early childhood stuttering, very little evidence about school-aged children and some evidence about adults. The most convincing evidence is about the Lidcombe Program in the treatment of young children who stutter, but also other methods have promising evidence. Our data imply that in the treatment of adults who stutter, holistic treatments may influence speech fluency and overall experience of stuttering behavior. Speech restructuring treatments may have a positive effect on overt characteristics of stuttering, but not on covert stuttering behavior.

CONCLUSIONS

The results of this review agree with earlier reviews about the treatment of young children. However, due to different inclusion criteria, this review also shows the benefits of holistic treatment approaches with adults and adolescents.

Cognitive disorders in childhood epilepsy: a comparative longitudinal study using administrative healthcare data

OBJECTIVE

The study aimed to assess the risk of cognitive impairment in patients with epilepsy, the impact of age of epilepsy onset on cognition and the temporal relationship of epilepsy onset and intellectual impairment.

METHODS

This longitudinal study analyzed birth cohorts and followed-up children born 2005-2007 up to the age of ten using administrative healthcare data of about 8.9 million members insured by the statutory health insurance "BARMER" in Germany. We compared prevalence of cognitive impairment (ICD-code F7*) in children with epilepsy (ICD-code G40) to controls, and calculated relative risks by age groups at onset of epilepsy and assessed differences in relation to the temporal sequence of the diagnoses.

RESULTS

Of the 142,563 pre-pubertal children included in the analysis, 2728 (1.9%) had an epilepsy diagnosis within the first 10 years of life. 17.4% (475/2728) of children with epilepsy had a diagnosis of cognitive impairment compared to 1.7% (2309/139835) in controls. The relative risk for cognitive impairment compared to age-matched controls was 10.5 (95% CI 9.6, 11.6) and was highest in epilepsy cases with seizure manifestation within the first 2 years of life compared to older children. The prevalence of cognitive impairment before epilepsy diagnosis was slightly increased compared to controls, while it was increased by a factor of nine in children diagnosed with cognitive impairment in the year of onset of epilepsy or afterwards.

CONCLUSIONS

Pre-pubertal children with epilepsy have a ten-fold higher risk for intellectual impairment compared to age-matched controls. This risk inversely correlates with the age of epilepsy manifestation. Cognitive impairment was diagnosed after epilepsy manifestation in the majority of patients.

The disabling nature of hope in discovering a biological explanation of stuttering

Discovering developmental stuttering's biological explanation has been an enduring concern. Novel advances in genomics and neuroscience are making it possible to isolate and pinpoint genetic and brain differences implicated in stuttering. This is giving rise to a hope that, in the future, dysfluency could be better managed if stuttering's biological basis could be better understood. Concurrent to this, there is another hope rising: a hope of a future where differing fluencies would not be viewed through a reductive lens of biology and associated pathologies. The central aim of this paper is to edge out ethical implications of novel research into stuttering's biological explanation. In doing so, the paper proposes to look beyond the bifurcation sketched by the medical and social model of disability. The paper demonstrates how the scientific hope of discovering stuttering's biological explanation acts as an accessory of disablement due to the language of 'lack' and 'deficit' employed in reporting scientific findings and proposes participatory research with people who stutter as an antidote to manage this disablement.

Dyscalculia and dyslexia in Chinese children with idiopathic epilepsy: different patterns of prevalence, comorbidity and gender differences

Objective

The present study aimed to examine the prevalence of dyscalculia, dyslexia, and their comorbidity rates in a large population‐based sample of children with idiopathic epilepsy (N = 2282) and a comparison sample of typically developing schoolchildren (N = 2371).

Methods

Both groups of children were screened using an arithmetic fluency test for dyscalculia and a reading fluency test for dyslexia. Their comorbidity rates were assessed. The prevalence rates of dyscalculia, dyslexia, comorbidity, and isolated dyscalculia/dyslexia (ie, participants with comorbid dyslexia and dyscalculia were excluded) were analyzed.

Results

In both −1.5 SD and −1 SD cutoff criterion, the prevalence rates were about two times higher in children with idiopathic epilepsy than in other schoolchildren; the prevalence rates of isolated dyslexia were higher in children with idiopathic epilepsy than in other schoolchildren (−1 SD: 10.9% vs 8.6%; −1.5 SD: 6.5% vs 4.7%). Meanwhile, comorbidity rates of dyscalculia and dyslexia were higher in children with idiopathic epilepsy than in other schoolchildren (32.7% vs 26.6%; 38.3% vs 23.5%, respectively). Overall, patterns of prevalence rates were different for children with idiopathic epilepsy and schoolchildren, in which children with idiopathic epilepsy had a higher prevalence rate of dyscalculia than dyslexia, while schoolchildren had a higher prevalence of dyslexia than dyscalculia, regardless of cutoff criteria. Interestingly, gender differences in the prevalence rates of all types of learning disabilities were found in schoolchildren, but there were only gender differences in the prevalence rates of dyslexia in children with idiopathic epilepsy.

Significance

The results highlight the vulnerability of children with idiopathic epilepsy for learning disabilities and a differential pattern of gender differences in dyslexia. Moreover, different patterns of prevalence rates suggest that children with idiopathic epilepsy and schoolchildren are more prone to different types of learning disabilities. The findings suggest needs for special interventions of learning disabilities for children with idiopathic epilepsy.