Notes on Stuttering Treatment Study

Objective of the Study

  • Stuttering in Preschoolers: A prevalent disorder in childhood with an incidence of 5 to 11%.

  • Study Goal: To compare the effectiveness of direct treatment (Lidcombe Program) and indirect treatment (RESTART-DCM) for preschool children who stutter.

Study Design and Methods

  • Trial Type: Multicenter randomized controlled trial with an 18-month follow-up.

  • Participants: 199 preschool children, ages 3-6, with at least 3% syllables stuttered for over 6 months.

  • Groups: Randomized into direct treatment (Lidcombe Program, n = 99) or indirect treatment (RESTART-DCM, n = 100).

  • Outcome Measures:

    • Primary: Percentage of non-stuttering children at 18 months.

    • Secondary: Stuttering frequency (%SS), severity ratings, health-related quality of life, emotional and behavioral problems, speech attitude.

Results Overview

  • Non-Stuttering Rate at 18 Months:

    • Direct Treatment: 76.5% classified as non-stuttering.

    • Indirect Treatment: 71.4% classified as non-stuttering.

  • Stuttering Frequency at 18 Months:

    • Direct: 1.2% (SD 2.1) stuttering.

    • Indirect: 1.5% (SD 2.1) stuttering.

  • Treatment Speed: Significant decline in %SS at 3 months for direct treatment (β = -1.89; p = .005).

Key Findings

  • Comparison of Treatments:

    • Both treatments show similar effectiveness by 18 months, potentially suggesting common effectiveness factors within both treatment models.

    • No significant differences in secondary outcomes or treatment intensity were noted between the two approaches.

Conclusions

  • Immediate vs. Long-Term Effects: Direct treatment resulted in quicker improvement in the first 3 months, but outcomes equalized at 18 months.

  • Recommendation for Both Treatments: At 18 months post-treatment, both direct and indirect treatments are validated, but the rapid effectiveness of the Lidcombe Program is noteworthy.

Implications for Practice

  • Future Research Needs: Calls for longer follow-up to assess long-term effectiveness and exploration of combined treatment approaches.

  • Application in Clinical Practice: Findings can guide clinicians in selecting appropriate interventions for young children who stutter based on treatment timelines and outcomes.

Stuttering in Preschoolers: A prevalent communication disorder in childhood, characterized by disruptions in the fluency of speech, affecting approximately 5 to 11% of preschool-aged children.

Study Goal: The primary aim of this research is to rigorously compare the effectiveness of two distinct therapeutic approaches: direct treatment using the Lidcombe Program, which actively involves parents in the treatment process, and indirect treatment through the RESTART-DCM model, which focuses on the child's environment and linguistic interactions, for preschool children diagnosed with stuttering.

Study Design and Methods

Trial Type: This investigation employs a multicenter randomized controlled trial design, featuring a comprehensive 18-month follow-up period to assess long-term outcomes and durability of treatment effects.

Participants: The study samples a total of 199 preschool children, aged between 3 to 6 years, who present with a stuttering frequency of at least 3% syllables stuttered over a span of 6 or more continuous months, ensuring that only children with a notable stuttering issue are included in the assessment.

Groups: Participants are randomized into two groups for treatment allocation: one receiving direct treatment via the Lidcombe Program (n = 99), which emphasizes speech fluency and parental involvement, and the other receiving indirect treatment using the RESTART-DCM (n = 100), focusing on naturalistic speech development strategies without direct pressure on the child to speak fluently.

Outcome Measures:

  • Primary Measure: The percentage of children classified as non-stuttering at the 18-month follow-up is the main outcome, providing insight into the immediate effectiveness of each treatment.

  • Secondary Measures: Additional outcomes include stuttering frequency measured as percentage of syllables stuttered (%SS), severity ratings assessed through standardized scales, health-related quality of life metrics, emotional and behavioral assessments, and analysis of speech attitudes among participants and their families, which contribute to a holistic view of treatment effectiveness.

Results Overview

Non-Stuttering Rate at 18 Months: Analysis indicates that 76.5% of children in the direct treatment group were classified as non-stuttering at the follow-up, suggesting a favorable response to the Lidcombe Program. In contrast, 71.4% of those in the indirect treatment group were categorized similarly, indicating effectiveness in both methods.

Stuttering Frequency at 18 Months: The data reveals a notable contrast in stuttering frequency, with the direct treatment group exhibiting a mean of 1.2% (SD 2.1) stuttering, whereas the indirect treatment group reported a mean of 1.5% (SD 2.1) stuttering. This slight disparity may have implications for clinical practice and treatment selection.

Treatment Speed: A significant decline in %SS was documented at the 3-month mark for children receiving direct treatment (β = -1.89; p = .005), underscoring the rapid response of children to the Lidcombe Program compared to the gradual improvements observed in the indirect treatment group.

Key Findings

Comparison of Treatments: Both therapeutic methods demonstrated similar effectiveness by the 18-month assessment, which could suggest shared effective underlying factors contributing to stuttering improvement in both the Lidcombe Program and RESTART-DCM. Notably, there were no significant differences detected in the secondary outcomes, including emotional well-being and treatment intensity, which provides further insights into the nature of treatment effectiveness.

Conclusions

Immediate vs. Long-Term Effects: While direct treatment yielded quicker improvements in stuttering frequency within the first 3 months, results at the 18-month follow-up indicated both treatment approaches produced comparable long-term outcomes. This finding emphasizes the need for clinicians to consider both immediate and sustained effectiveness when selecting therapeutic interventions for stuttering.

Recommendation for Both Treatments: At the conclusion of the 18-month post-treatment evaluation, both the direct and indirect treatment methodologies validated their effectiveness, but the rapid improvement observed with the Lidcombe Program highlights its potential as a first-line treatment option for preschool-aged children.

Implications for Practice

Future Research Needs: This study underscores the need for additional research exploring longer follow-up periods to better understand the enduring impact of these treatments. Further investigation into combined treatment approaches may unveil synergistic benefits not captured in isolated treatment applications.

Application in Clinical Practice: The findings serve as a guide for clinicians in selecting appropriate interventions tailored to the unique needs of young children suffering from stuttering. The insights into treatment timelines and outcomes can significantly inform clinical decision-making processes and enhance therapeutic strategies for preschool children affected by this communication disorder.