SynthesisDysphagia2013
A systematic review and meta-analysis of measurements of tongue and hand strength and endurance using the Iowa Oral Performance Instrument (IOPI).
Synthesis in Dysphagia, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 114 papers, 4 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.
The Influence of Age and Gender on Tongue Pressure and Swallowing Tongue Pressure
Investigation of the Effect of Lip, Cheek, and Tongue Muscle Pressure on Maxillary Transverse Development
Who cites it
114 citing papers in PubMed, 4 syntheses or guidelines pooled it, 242 citations in OpenAlex.
- Effects of tongue strengthening exercises on tongue muscle strength: a systematic review and meta-analysis of randomized controlled trials.Scientific reports · 2022Pooled it
- Pooled it
- A Systematic Review of Isometric Lingual Strength-Training Programs in Adults With and Without Dysphagia.American journal of speech-language pathology · 2017Pooled it
- Horticultural Therapy in Patients With Dementia: A Systematic Review and Meta-Analysis.American journal of Alzheimer's disease and other dementiasPooled it
- Exploring orofacial myofunctional therapy and its core components in mixed-dentition anterior open bite: the ombit study.Clinical oral investigations · 2026Trial
- Trial
- Effects of synergistic tongue and chin resistance training on swallowing function, oral intake, and cognitive function in community-dwelling elderly individuals with frailty: a double-blind randomised controlled trial.Journal of global health · 2025Trial
- Brief orofacial myofunctional therapy and tongue pressure as prediction factors for open bite correction: a randomized clinical trial.Clinical oral investigations · 2025Trial
- Trial
- The effect of tongue elevation muscle training in patients with obstructive sleep apnea: A randomised controlled trial.Journal of oral rehabilitation · 2022Trial
- Effects of Tongue-Strengthening Exercise on Tongue Strength Reserve and Detraining Effects among Healthy Adults: A Randomized Controlled Trial.International journal of environmental research and public health · 2022Trial
- A Randomized Controlled Trial Comparing Physical and Mental Lingual Exercise for Healthy Older Adults.Dysphagia · 2021Trial
- Development and evaluation of myofunctional therapy support program (MTSP) based on self-efficacy theory for patients with obstructive sleep apnea.Sleep & breathing = Schlaf & Atmung · 2020Trial
- The effect of orofacial myofunctional treatment in children with anterior open bite and tongue dysfunction: a pilot study.European journal of orthodontics · 2016Trial
- Trial
- Article
- Association between oral food processing ability and nutritional status of older adults based on factor analysis.BMC nutrition · 2026Article
- Hidden Undernourishment: Sex and Disease Factors Associated with the Underrating of Swallowing Function.Dysphagia · 2026Article
- Swallowing Pathophysiology in Primary Sarcopenia: A Multimodal Assessment in Older Adults.Dysphagia · 2026Article
- Review
54 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
5 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The purpose of this systematic review was to examine the evidence for the use of the Iowa Oral Performance Instrument (IOPI) to measure strength and endurance of the tongue and hand in healthy populations and those with medical conditions. A systematic search of the scientific literature published since 1991 yielded 38 studies that addressed this purpose. The IOPI was used primarily for tongue strength (38 studies) and endurance (15 studies) measurement; relatively few studies measured hand strength (9 studies) or endurance (6 studies). The majority of the studies identified used the IOPI as an evaluation tool, although four used it as an intervention tool. Half the studies were conducted in healthy people, primarily adults. Most of the other participants had disorders with dysphagia, primarily Parkinson's disease or head or neck cancer. Age and gender, as well as a number of medical conditions, influence the values of tongue and hand strength. There is sufficient evidence to support the use of the IOPI as a suitable tool for measuring tongue strength and endurance and as an assessment tool for intervention studies, and there is growing support for its use to assess hand strength and endurance in healthy and clinical populations.
Indexed as
Identifiers
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.