SynthesisMedicine2016
Probiotics for prevention and treatment of respiratory tract infections in children: A systematic review and meta-analysis of randomized controlled trials.
Synthesis in Medicine, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 108 papers, 10 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
108 citing papers in PubMed, 10 syntheses or guidelines pooled it, 199 citations in OpenAlex.
- Efficacy of Probiotics Compared With Pharmacological Treatments for Maintenance Therapy for Functional Constipation in Children: A Systematic Review and Network Meta-analysis.Nutrition reviews · 2025Pooled it
- Orally Ingested Probiotics, Prebiotics, and Synbiotics as Countermeasures for Respiratory Tract Infections in Nonelderly Adults: A Systematic Review and Meta-Analysis.Advances in nutrition (Bethesda, Md.) · 2022Pooled it
- Pooled it
- Pooled it
- Modulation of gut microbiota protects against viral respiratory tract infections: a systematic review of animal and clinical studies.European journal of nutrition · 2021Pooled it
- Role of Probiotics in Stimulating the Immune System in Viral Respiratory Tract Infections: A Narrative Review.Nutrients · 2020Pooled it
- Preventing Respiratory Tract Infections by Synbiotic Interventions: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.Advances in nutrition (Bethesda, Md.) · 2020Pooled it
- Postbiotics for Preventing and Treating Common Infectious Diseases in Children: A Systematic Review.Nutrients · 2020Pooled it
- Probiotics for preventing acute otitis media in children.The Cochrane database of systematic reviews · 2019Pooled it
- Probiotics for respiratory tract infections in children attending day care centers-a systematic review.European journal of pediatrics · 2018Pooled it
- Safety ofNutrients · 2026Trial
- Probiotic Supplementation Reduces RRTIs and Enhances Gut Microbial and Immunity in Children: A Randomized Controlled Trial.Journal of microbiology and biotechnology · 2026Trial
- Trial
- Changes in the pharyngeal and nasal microbiota in pediatric patients with adenotonsillar hypertrophy.Microbiology spectrum · 2024Trial
- Impact of Infectious Disease afterNutrients · 2022Trial
- Probiotic effects on immunity and microbiome in HIV-1 discordant patients.Frontiers in immunology · 2022Trial
- Effect of fermented milk on upper respiratory tract infection in adults who lived in the haze area of Northern China: a randomized clinical trial.Pharmaceutical biology · 2021Trial
- Viable and Heat-Killed Probiotic Strains Improve Oral Immunity by Elevating the IgA Concentration in the Oral Mucosa.Current microbiology · 2021Trial
- Effect of probiotics on thymus size and markers of infection in late infancy: a randomized controlled trial.Pediatric research · 2021Trial
- Bacteriotherapy with Streptococcus salivarius 24SMB and Streptococcus oralis 89a nasal spray for treatment of upper respiratory tract infections in children: a pilot study on short-term efficacy.Italian journal of pediatrics · 2020Trial
48 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
10 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundRespiratory tract infections (RTIs) represent one of the main health problems in children. Probiotics are viable bacteria that colonize the intestine and affect the host intestinal microbial balance. Accumulating evidence suggests that probiotic consumption may decrease the incidence of or modify RTIs. The authors systematically reviewed data from randomized controlled trials (RCTs) to investigate the effect of probiotic consumption on RTIs in children.
methodsMEDLINE/PubMed, Embase, Cochrane Library, and Web of Science were systematically searched for RCTs regarding the effect of probiotics on RTIs in children. The outcomes included number of children experienced with at least 1 RTI episode, duration of illness episodes, days of illness per subject, and school/day care absenteeism due to infection. A random-effects model was used to calculate pooled relative risks, or mean difference (MD) with the corresponding 95% confidence interval (CI).
resultsA total of 23 trials involving 6269 children were eligible for inclusion in the systematic review. None of the trials showed a high risk of bias. The quality of the evidence of outcomes was moderate. The age range of subjects was from newborn to 18 years. The results of meta-analysis showed that probiotic consumption significantly decreased the number of subjects having at least 1 RTI episode (17 RCTs, 4513 children, relative risk 0.89, 95% CI 0.82-0.96, P = 0.004). Children supplemented with probiotics had fewer numbers of days of RTIs per person compared with children who had taken a placebo (6 RCTs, 2067 children, MD -0.16, 95% CI -0.29 to 0.02, P = 0.03), and had fewer numbers of days absent from day care/school (8 RCTs, 1499 children, MD -0.94, 95% CI -1.72 to -0.15, P = 0.02). However, there was no statistically significant difference of illness episode duration between probiotic intervention group and placebo group (9 RCTs, 2817 children, MD -0.60, 95% CI -1.49 to 0.30, P = 0.19).
conclusionBased on the available data and taking into account the safety profile of RCTs, probiotic consumption appears to be a feasible way to decrease the incidence of RTIs in children.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.