Effects of voice therapy in children with vocal fold nodules: A systematic review.

BACKGROUND: Vocal fold nodules (VFNs) are the main cause of paediatric dysphonia. Voice therapy is recommended as the preferable treatment option for VFNs in children. AIM: The aim of this systematic review is to provide an overview of the existing literature concerning the effects of voice therapy in children with VFNs. METHODS & PROCEDURES: This systematic literature review was developed following the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. The Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE (via PubMed) and Embase were searched and the grey literature was checked. The search strategy was based on three concepts: VFNs, voice therapy and children. Two examiners independently determined article eligibility and extracted all relevant data from the included studies. The methodological quality of the included study was assessed using the QualSyst tool. MAIN CONTRIBUTIONS: By identifying, evaluating and summarizing the results of all relevant studies about voice therapy in paediatric VFNs, this systematic review makes the available evidence more accessible to voice therapists, otolaryngologists and other relevant stakeholders. CONCLUSIONS & IMPLICATIONS: 24 studies were included in this systematic review. Eight studies (8/24) reported a significant improvement for at least one outcome parameter after voice therapy. However, five papers (5/24) could not demonstrate significant changes after voice therapy. All studies that did not test for significance (11/24) found improvements for one or more outcome parameters. The overall quality of the included studies is adequate (55%). In sum, there is some evidence that voice therapy is effective in children with VFNs, but further well-designed research, especially randomized controlled trials, is necessary to confirm these results. WHAT THIS PAPER ADDS: What is already known on the subject Voice therapy is preferable in children with VFNs because of the phonotraumatic nature of the nodules and the associated high recurrence rate after phonosurgery. Most voice therapists in clinical practice offer an eclectic voice therapy programme, consisting of direct and indirect voice therapy techniques. What this study adds to existing knowledge This systematic review provides a clear overview of the available evidence concerning the effects of voice therapy in paediatric VFNs. There is some evidence that voice therapy is an effective treatment option in children with VFNs, but well-designed research is scarce on this subject. What are the potential or actual clinical implications of this work? This review shows that effectiveness studies with strong designs are very scarce in children with VFNs. Clinicians should be aware that few therapy techniques have been thoroughly investigated in this population. However, this review may guide voice therapists when creating a treatment plan for a child with VFNs because it identifies, evaluates and summarizes the results of all relevant individual studies about voice therapy in paediatric VFNs. Voice therapy seems to be effective in treating paediatric patients with VFNs, given the fact that a considerable number of included studies report significant improvements after voice therapy. Both direct and indirect therapy approaches appear to have a positive effect on the phonation of children with VFNs.

Perceptual Speech Outcomes After Early Primary Palatal Repair in Ugandan Patients With Cleft Palate.

OBJECTIVE: To provide speech outcomes of English-speaking Ugandan patients with a cleft palate with or without cleft lip (CP±L). DESIGN: Prospective case-control study. SETTING: Referral hospital for patients with cleft lip and palate in Uganda. PARTICIPANTS: Twenty-four English-speaking Ugandan children with a CP±L (15 boys, 9 girls, mean 8.4 years) who received palatal closure prior to 6 months of age and an age- and gender-matched control group of Ugandan children without cleft palate. INTERVENTIONS: Comparison of speech outcomes of the patient and control group. MAIN OUTCOME MEASURES: Perceptual speech outcomes including articulation, resonance, speech understandability and acceptability, and velopharyngeal composite score (VPC-sum). Information regarding speech therapy, fistula rate, and secondary surgery. RESULTS: Normal speech understandability was observed in 42% of the patients, and 38% were judged with normal speech acceptability. Only 16% showed compensatory articulation. Acceptable resonance was found in 71%, and 75% of the patients were judged perceptually to present with competent velopharyngeal function based on the VPC-sum. Additional speech intervention was recommended in 25% of the patients. Statistically significant differences for all these variables were still observed with the control children (P < .05). CONCLUSIONS: Overall, acceptable speech outcomes were found after early primary palatal closure. Comparable or even better results were found in comparison with international benchmarks, especially regarding the presence of compensatory articulation. Whether this approach is transferable to Western countries is the subject for further research.

Technical Reading and Writing Skills and Their Relationship with Linguistic Processes in Children with a Cleft (Lip and) Palate: A Comparison with Peers.

INTRODUCTION: Poor word decoding skills and writing skills can impact job opportunities and psychosocial functioning. Despite the importance of identifying possible literacy problems for the child's future performance, there seems to be no consensus on this topic in children with a cleft of the palate with or without a cleft of the lip (CP±L). The aim of this study was to investigate reading and writing skills and their relationship with linguistic processes in Dutch-speaking children with a CP±L compared to a group of children without a CP±L. METHODS: Twelve children with a CP±L and 12 children without a CP±L (age range 7-12 years) were included in the study. The 2 groups were matched based on age, gender, and socioeconomic status. An assessment battery including language, reading, and writing tests was administered to both groups. RESULTS: No statistically significant differences in reading and writing skills were found when comparing children with and without a CP±L. Interestingly, a moderate correlation was found between the children's reading skills and phonological awareness. Moderate correlations were also revealed between writing skills and several working memory tasks. DISCUSSION/CONCLUSION: Our findings did not provide evidence for any difference in word decoding skills and writing skills between children with a CP±L and their peers. Some linguistic processes, more specifically phonological awareness and working memory, are important factors that contribute to the child's literacy development. Identification of these linguistic skills can provide important information on the child's future reading and writing performance. Future studies should increase sample sizes to confirm these results.

Clinical Experiences of Voice Therapists in the Rehabilitation of Pediatric Vocal Fold Nodules.

OBJECTIVES: The purpose of this study was to identify common clinical practices and experiences of voice therapists regarding the treatment of pediatric vocal fold nodules (VFNs) in Flanders, Belgium. STUDY DESIGN: Observational survey study. METHODS: A 38-item online survey was completed by 35 voice therapists (32 females, 3 males) with experience in treating pediatric VFNs. Demographic characteristics, occupational characteristics, educational characteristics, therapy content, therapy delivery model, and experience of the voice therapist were explored. Experiences of voice therapists were measured using visual analog scales (score 0-100). An extensive descriptive analysis was performed using IBM SPSS version 28. RESULTS: The majority of voice therapists (93.9%) provide a combination of direct and indirect therapy techniques when treating children with VFNs. The most commonly used direct techniques are breathing exercises (84.4%), semioccluded vocal tract exercises (71.9%) with a clear preference for resonance tube in water and resonant voice therapy, and relaxation exercises (65.6%). On average, Flemish voice therapists provide 24.80 (SD: 11.5, range: 10-50) half-hour sessions, usually at a frequency of once a week. No respondents had experience with intensive therapy or group therapy in the treatment of pediatric VFNs. Regarding the experience of voice therapists with treating VFNs in children, respondents give a mean score of 77.28 (SD: 13.7, range: 50-100) on a scale of 0 (negative experience) to 100 (positive experience). Furthermore, 96.2% of voice therapists experience difficulties during treatment and 40% feel there are not enough targeted training opportunities on the topic of pediatric VFNs. CONCLUSION: Flemish voice therapists generally feel comfortable treating pediatric VFNs. They usually provide a combination of direct and indirect therapy and use a wide range of different direct therapy techniques. However, there is still some need to organize more focused and tailor-made training initiatives.

Long-term Acoustic Effects of Gender-Affirming Voice Training in Transgender Women.

OBJECTIVES: One role of a speech-language pathologist (SLP) is to help transgender clients in developing a healthy, gender-congruent communication. Transgender women frequently approach SLPs to train their voices to sound more feminine, however, long-term acoustic effects of the training needs to be rigorously examined in effectiveness studies. The aim of this study was to investigate the long-term effects (follow-up 1: 3months and follow-up 2: 1year after last session) of gender-affirming voice training for transgender women, in terms of acoustic parameters. STUDY DESIGN: This study was a randomized sham-controlled trial with a cross-over design. METHODS: Twenty-six transgender women were included for follow-up 1 and 18 for follow-up 2. All participants received 14weeks of gender-affirming voice training (4weeks sham training, 10weeks of voice feminization training: 5weeks pitch elevation training and 5weeks articulation-resonance training), but in a different order. Speech samples were recorded with Praat at four different time points (pre, post, follow-up 1, follow-up 2). Acoustic analysis included fo of sustained vowel /a:/, reading and spontaneous speech. Formant frequencies (F1-F2-F3) of vowels /a/, /i/, and /u/ were determined and vowel space was calculated. A linear mixed model was used to compare the acoustic voice measurements between measurements (pre - post, pre - follow-up 1, pre - follow-up 2, post - follow-up 1, post - follow-up 2, follow-up 1 - follow-up 2). RESULTS: Most of the fo measurements and formant frequencies that increased immediately after the intervention, were stable at both follow-up measurements. The median fo during the sustained vowel, reading and spontaneous speech stayed increased at both follow-ups compared to the pre-measurement. However, a decrease of 16 Hz/1.7 ST (reading) and 12 Hz/1.5 ST (spontaneous speech) was detected between the post-measurement (169 Hz for reading, 144 Hz for spontaneous speech) and 1year after the last session (153 Hz and 132 Hz, respectively). The lower limit of fo did not change during reading and spontaneous speech, both directly after the intervention and during both follow-ups. F1-2 of vowel /a/ and the vowel space increased after the intervention and both follow-ups. Individual analyses showed that more aspects should be controlled after the intervention, such as exercises that were performed at home, or the duration of extra gender-affirming voice training sessions. CONCLUSIONS: After 10 sessions of voice feminization training and follow-up measurements after 3months and 1year, stable increases were found for some formant frequencies and fo measurements, but not all of them. More time should be spent on increasing the fifth percentile of fo, as the lower limit of fo also contributes to the perception of more feminine voice.

The Occurrence of Laryngeal Pathologies in a Treatment-Seeking Pediatric Population.

OBJECTIVES: The purpose of this study was to 1) describe the age- and sex-specific occurrence of laryngeal pathologies in a treatment-seeking pediatric population in the voice unit of Ghent University Hospital, Belgium, and 2) describe this population in terms of vocal parameters, vocal complaints, influencing factors, and treatment history and recommendation. STUDY DESIGN: Retrospective, observational study. METHODS: All patient records were analyzed for children (0-18 years) who consulted the ear, nose, and throat department of Ghent University Hospital for the first time between July 2015 and June 2021 with complaints of dysphonia. In total, 103 children (66 males, 37 females) with a mean age of 10.01 years (SD: 3.4, range 3.93-17.96) were included in this study. Laryngeal pathology was diagnosed using a flexible videolaryngo(strobo)scopy. The influence of age and sex on laryngeal etiology (organic/functional voice disorder) was examined using a Welch-modified t test and a Fisher's exact test, respectively. RESULTS: Organic lesions were observed in 77.7% of the participants, with vocal fold nodules (VFNs) being the most common diagnosis (66.0%). A functional voice disorder was diagnosed in 22.3% of the children. Children with a functional voice disorder are significantly older than children with an organic voice disorder. There was no statistically significant difference between males and females in laryngeal etiology. Mean dysphonia severity index was -2.7 (SD: 3.2, range -9.3 to +3.7), the mean acoustic voice quality index 4.70 (SD: 1.5, range 2.35-8.27), and the mean pediatric voice handicap index 29.8 (SD: 13.6, range 5-60). The occurrence of vocal misuse was mentioned in 80.6% of the patient records. CONCLUSION: Organic voice disorders, especially VFNs, are predominant in treatment-seeking children with dysphonia. Functional voice disorders become more common with increasing age during childhood. A disordered vocal quality, reduced vocal capabilities and reduced voice-related quality of life were found.

Short-Term Acoustic Effects of Speech Therapy in Transgender Women: A Randomized Controlled Trial.

PURPOSE: This study measured and compared the acoustic short-term effects of pitch elevation training (PET) and articulation-resonance training (ART) and the combination of both programs, in transgender women. METHOD: A randomized controlled study with cross-over design was used. Thirty transgender women were included and received 14 weeks of speech training. All participants started with 4 weeks of sham training; after which they were randomly assigned to one of two groups: One group continued with PET (5 weeks), followed by ART (5 weeks); the second group received both trainings in opposite order. Participants were recorded 4 times, in between the training blocks: pre, post 1 (after sham), post 2 (after training 1), and post 3 (after training 2). Speech samples included a sustained vowel, continuous speech during reading, and spontaneous speech and were analyzed using Praat software. Fundamental frequency (f o), intensity, voice range profile, vowel formant frequencies (F 1-2-3-4-5 of /a/-/i/-/u/), formant contrasts, vowel space, and vocal quality (Acoustic Voice Quality Index) were determined. RESULTS AND CONCLUSIONS: Fundamental frequencies increased after both the PET and ART program, with a higher increase after PET. The combination of both interventions showed a mean increase of the f o of 49 Hz during a sustained vowel, 49 Hz during reading, and 29 Hz during spontaneous speech. However, the lower limit (percentile 5) of the f o during spontaneous speech did not change. Higher values were detected for F 1-2 of /a/, F 3 of /u/, and vowel space after PET and ART separately. F 1-2-3 of /a/, F 1-3-4 of /u/, vowel space, and formant contrasts increased after the combination of PET and ART; hence, the combination induced more increases in formant frequencies. Intensity and voice quality measurements did not change. No order effect was detected; that is, starting with PET or ART did not change the outcome.

Voice Outcome of Glottoplasty in Trans Women.

PURPOSE: This study investigates the short- and longer-term effects of glottoplasty up to six months after surgery on acoustic voice parameters, listener perceptions, and client's satisfaction in trans women. Secondly, the impact of chondrolaryngoplasty and voice therapy on the glottopasty outcomes was investigated. METHOD: A prospective longitudinal non-controlled trial was used. Thirty-five trans women undergoing glottoplasty or a combination of glottopasty and chondrolaryngoplasty were included in this study. A voice assessment was conducted before surgery and 1 week, 1 month and 6 months after surgery. The following outcome parameters were measured: fundamental frequency (fo), intensity, frequency and intensity range, Dysphonia Severity Index (DSI), Acoustic Voice Quality Index (AVQI), Voice Handicap Index (VHI), Trans Woman Voice Questionnaire (TWVQ), and visual analogue scales (VAS) measuring client's satisfaction. Listener perceptions of masculinity-femininity were collected using a listening experiment. RESULTS: Significant differences over time were found for all fo and intensity parameters, DSI, AVQI, VHI and TWVQ scores. Listener perception and self-perception of femininity was higher after surgery. Significant differences in evolution of listener perceptions were found between the groups with and without voice therapy. CONCLUSION: Glottoplasty improves voice related quality of life and is an effective method to increase the fo and associated perceptual femininity. After glottoplasty an immediate and short-term decrease in voice quality, vocal capacity and frequency range was measured with a progressive recovery on the longer term. Long term side effects of glottoplasty are a reduction in speaking intensity and intensity range. Voice therapy seems to improve the outcomes of glottoplasty, but should be further investigated in future studies.

Longitudinal Vocal Outcomes and Voice-Related Quality of Life After Selective Bilateral Laryngeal Reinnervation: A Case Study.

PURPOSE: Bilateral vocal fold paralysis (BVFP) is a severe disorder that can result in respiratory, swallowing, and voice-related problems. Most surgical treatments do not restore laryngeal function and often need to compromise voice quality to preserve respiratory function. Laryngeal reinnervation (LR) may offer a solution to this problem, but literature on longitudinal outcomes of this procedure is scarce. This study aims to report the longitudinal vocal outcomes of BVFP after LR and subsequent voice therapy. METHOD: The case of a 23-year-old man with BVFP after a traumatic dissection of both recurrent laryngeal nerves is described. Selective bilateral LR of both adductors and abductors was performed 5 months after the onset of BVFP. Voice therapy was provided after the LR procedure. Multidimensional voice assessments, including acoustic, perceptual, and patient-reported outcome measures (PROMs), were conducted 2, 5, 6.5, 8, and 31 months after LR. RESULTS: An improvement of vocal capabilities and voice quality was noticed 6.5 months after LR, after 4.5 months of voice therapy, with normative values after 2.5 years. PROMs showed an improvement of voice-related quality of life, but some limitations to activities of daily living were still present. Inspiratory arytenoid abduction was not observed on laryngeal videostroboscopic findings in this patient, but tracheostomy was not required. CONCLUSIONS: Voice therapy after LR helps establish healthy and efficient voice use without increasing compensatory hyperfunctional behavior. More research is needed to examine potential merits of voice therapy in the rehabilitation of vocal and respiratory functions after LR.

Knowledge of the Voice in the Teachers' Population and their Ability to Refer Children with Voice Disorders to a Speech-Language Pathologist.

OBJECTIVES: The objectives of this study were to investigate (1) the knowledge of primary school teachers regarding voice and voice disorders, (2) the primary school teacher's ability to identify and refer a dysphonic child to a speech-language pathologist (SLP), and (3) potential contributing factors that might affect this ability. METHOD AND MATERIALS: Thirty-one primary school teachers (30 women, one man) with a mean age of 33 years (range: 22-57 years; SD: 11.1 years) were included in this study. They filled out an online questionnaire, gathering demographic information, estimations of their knowledge regarding voice and voice disorders, and their ability to refer a dysphonic child to an SLP. Furthermore, they completed an online quiz (maximum score: 9) with basic questions about the voice, vocal health and voice disorders. RESULTS: Most teachers (58.1%) rated their knowledge as basic, 16.1% as adequate and 25.8% as good. One out of four teachers (25.8%) received voice-related information during their education. A substantial part (38.7%) gathered information through other channels, such as voice therapy. Almost all participants (90%) reported to have no or little experience with dysphonic children. Half of them (51.6%) felt unsure about their ability to refer a dysphonic child to an SLP, and 54.8% were willing to attend extra voice workshops. A significant association was found between the estimated knowledge regarding voice (disorders) and attendance of voice therapy (P = 0.020). More than half of the teachers who attended voice therapy (57.1%) estimated their voice-related knowledge as good, compared to only 16.7% of the teachers who did not attend voice therapy. Moreover, a significant association was found between the years of teaching experience and the quiz total score (P = 0.040). The majority of the teachers with the least teaching experience (57.1%) achieved a score between 4 and 6, whereas the teachers with more experience achieved a score between 7 and 9. CONCLUSION: This study suggests that the voice-related knowledge of primary school teachers is limited. Consequently, teachers do not feel confident in referring a dysphonic child to an SLP. As teachers can be important sources in indirect assessment of pediatric dysphonia, they need to be well informed and extensively trained in using voice screening protocols. Interdisciplinary cooperation between SLPs and teachers should be optimized to provide the best available care and improve the children's quality of life.

Validity and Reliability of the Dutch Children's Voice Handicap Index-10.

OBJECTIVES: Voice-related quality of life (Qol) questionnaires provide the clinician with information regarding the impact of voice disorders on the patient's well-being. The available voice-related QoL tools for Dutch-speaking children are parent-proxy in nature. However, the use of proxy measurements has been debated in the literature. The Children's Voice Handicap Index-10 (CVHI-10) is a self-reported QoL tool for dysphonic children. Therefore, the aim of this study is to develop and validate a Dutch version of the CVHI-10. STUDY DESIGN: Observational, prospective, cross-sectional study. METHODS: The original version of the CVHI-10 was translated and adapted to Dutch according to the recommendations of the Quality of Life Special Interest Group - Translation and Cultural Adaptation group. Subsequently, the questionnaire was individually completed by 77 children (dysphonic group: n = 30, control group: n = 47) between eight and 14 years. In order to investigate test-retest reliability, 50% of the participants were asked to complete the questionnaire twice with an interval of 2 weeks. Internal consistency, test-retest reliability and construct validity were calculated. A receiver operating characteristic (ROC) analysis was conducted to check the sensitivity and specificity levels of the instrument. RESULTS: Internal consistency measured with Cronbach's alpha coefficient was 0.745. Test-retest reliability measured with intraclass correlation coefficients was 0.718. Mean total CVHI-10 score was 6.17 ± 2.7 in the dysphonic group and 2.68 ± 2.6 in the control group. The difference in total score between the groups was statistically significant (P < 0.001), suggesting that the tool has good construct validity. ROC analysis demonstrated moderate diagnostic accuracy (area under the curve = 0.869) and suggested a cut-off score of 3.5. CONCLUSIONS: The Dutch CVHI-10 is the first self-reported voice-related QoL tool for dysphonic Dutch-speaking children. It is a valid, reliable and sensitive tool to assess the impact of a voice disorder on the child's well-being.

Reliability results of perceptual ratings of resonance, nasal airflow and speech acceptability in patients with cleft palate by Ugandan speech-language pathologists following a two-day workshop.

INTRODUCTION: To meet the scarcity of training and/or educational initiatives in Uganda regarding state-of-the-art speech diagnosis and treatment in patients with cleft palate, a workshop was organized for all interested speech-language pathologists and health care workers. OBJECTIVE: To evaluate and compare the inter- and intra-rater reliability of the perceptual evaluation of hypernasality, hyponasality, nasal emission, nasal turbulence and speech acceptability before and after a two-day workshop in Ugandan speech-language pathologists. METHODS: On the first day, perceptual speech evaluation was discussed and practiced. Perceptual exercises included individual ratings of a specific speech variable followed by a group discussion and consensus listening exercises in listener pairs. The second day focused on speech treatment. Ten Ugandan speech-language pathologists rated speech samples of Ugandan patients with a CP ± L before and immediately following the two-day workshop. Inter- and intra-rater reliability of the perceptual ratings of hypernasality, hyponasality, nasal emission, nasal turbulence and speech acceptability were determined by means of the absolute percentage of agreement. The Wilcoxon signed-rank test was used to compare results at both time points. RESULTS: Overall inter- and intra-rater reliability improved when observing the absolute percentage agreement. However, median agreement results only showed enhanced reliability for hypernasality, hyponasality and nasal turbulence whereas (limited) deteriorated reliability was observed for nasal emission and speech acceptability. Regarding inter-rater reliability only the median percentage agreement for hyponasality exceeded 50% (median: 56.3%). Overall, better results were found for intra-rater reliability, with only weak results for speech acceptability. DISCUSSION AND CONCLUSION: Training positively affected reliability results. Nonetheless, this improvement was not achieved for each speech variable and reliability improvements were modest. Findings indicate the need for continued training and the search for the most effective training paradigm and feedback techniques, whilst taking into account clinical relevance and practical considerations.