Intranasal Treatments for Children with Sleep-Disordered Breathing – The MIST+ Randomisedย Clinical Trial Gillian M Nixon et al. JAMA Pediatr. 2026.
Summary
Symptoms of obstructive sleep disordered breathing(OSDB) are common in childhood and associated with significant comorbidity. Surgical treatment with adenotonsillectomy is first-line treatment but medical treatments show potential to improve symptoms and reduce the need for surgery.
Study Background and Objective
- OSDB is prevalent in children, affecting up to 12% and often leading to significant comorbidities. โ
- Adeno-tonsillectomy is the standard surgical treatment, but medical therapies, such as intranasal steroids (INS), may alleviate symptoms and reduce surgical needs. โ
- The MIST+ trial aimed to assess the effectiveness of 6 weeks of Intra nasal steroid versus saline(0.9% saline) in children with persistent OSDB symptoms after an initial saline treatment phase.
Study Design and Participants
- This double-blind, placebo-controlled trial was conducted at two pediatric hospitals in Australia, enrolling children aged 3 to 12 years. โ
- Participants underwent a 6-week run-in phase with intranasal saline; those with unresolved symptoms were randomized to receive either INS or continued saline for another 6 weeks.
- A total of 150 children were recruited, with 93 randomized after the run-in phase.
- All enrolled participants received 1 spray of 0.9% sodium chloride (normal saline nasal spray ) per nostril per day for a 6-week run-in period
- Those with persisting symptoms (SDB score โฅ-1) were randomized to either once-daily intranasal mometasone furoate, 50 ยตg, (INS) or continued saline for a further 6 weeks.
Main Outcomes and Findings
- The primary outcome was symptom resolution, defined as an SDB score of less than -1. โ
- 6 weeks of intranasal saline resolved OSDB symptoms in nearly one-third of children.
- An additional 6-week course of INS or saline led to resolution in another one-third (total resolution around 50%), with no added benefit from INS.
- After the run-in phase, 29.5% of children experienced symptom resolution with saline.ย In the treatment phase, 35.6% of the INS group and 36.4% of the saline group achieved symptom resolution, showing no significant difference between the two treatments (risk difference of -0.9%).
- Secondary outcomes, including behavior, quality of life, and parental perceptions regarding the need for surgery, did not differ significantly between groups. โ
- Overall, about 50% of children experienced symptom resolution after 12 weeks of treatment, with saline proving effective as a first-line therapy.
Implications for Practice
- The results suggest that intranasal saline is a viable first-line treatment for OSDB, potentially reducing the need for specialist referrals and surgical interventions. โ
- The study advocates for a trial of saline for 3 months before considering further specialist evaluation or surgical options.
Compliance and Adverse Events
- Compliance with the treatment was high, with 90.5% adherence reported during the run-in phase.
- Adverse events were generally mild, with nasal irritation and epistaxis being the most common, but these were not significantly different between the INS and saline groups. โ
Conclusion
- The MIST+ trial indicates that intranasal saline is effective in resolving OSDB symptoms in children, with no added benefit from INS. โ
- The findings support the recommendation of saline as a first-line treatment, which may alleviate the burden on specialist services and improve access for children with more severe symptoms.
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Reference
https://pubmed.ncbi.nlm.nih.gov/41557344/
The ENT perspective
From an ENT perspective this is important. But I feel its important to do a full clinical workup,ย radiologyย and blood tests before starting the child on three months on nasal saline spray.In some cases OSDB may be associated with allergic symptoms,hypothyroidism,nasal polyps,nasal mass (otherย time sensitive )causes which may be missed without a full workup excluding them.
In all cases nose breathing should be encouraged to avoid mouth breathing and malocclusion problems.Adenoid facies and its associated malocclusion of teeth may cause significant distress in children and hence its an important thing to keep in mind.Unlike adult snoring problems maxillofacial growth is significantly affected in children with snoring habits.

