Trial reportPloS one2013
Impact of low filter resistances on subjective and physiological responses to filtering facepiece respirators.
Trial report in PloS one, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis 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
24 citing papers in PubMed, 1 synthesis or guideline pooled it.
- N95 Filtering Facepiece Respirator Use during Pregnancy: A Systematic Review.American journal of perinatology · 2020Pooled it
- Effect of face masks on dyspnea perception, cardiopulmonary parameters, and facial temperature in healthy adults.Narra J · 2024Trial
- Effects of surgical and cloth facemasks during a submaximal exercise test in healthy adults.Respiratory medicine · 2021Trial
- The Respiratory Protection Effectiveness Clinical Trial (ResPECT): a cluster-randomized comparison of respirator and medical mask effectiveness against respiratory infections in healthcare personnel.BMC infectious diseases · 2016Trial
- Effect of external airflow resistive load on postural and exercise-associated cardiovascular and pulmonary responses in pregnancy: a case control study.BMC pregnancy and childbirth · 2015Trial
- Assessment of KN95 Mask Filtering Degradation and Breathing Detection: A Pilot Study.Sensors (Basel, Switzerland) · 2025Article
- The influence of N95 and surgical masks on carbon dioxide levels: A comprehensive systematic review and meta-analysis.Heliyon · 2024Article
- A retrospective characterization of pediatric facemasks marketed in the United States and implications for future designs.PloS one · 2024Article
- Added Breathing Resistance during Exercise Impairs Pulmonary Ventilation and Exaggerates Exercise-Induced Hypoxemia Leading to Impaired Aerobic Exercise Performance.International journal of environmental research and public health · 2023Article
- Benchtop assessment of sealing efficacy and breathability of additively manufactured (AM) face masks.Additive manufacturing · 2023Article
- Added Inspiratory Resistance Does Not Impair Cognitive Function and Mood State.International journal of environmental research and public health · 2023Article
- COVID-19: Masks do not influence neurocognitive performance during a shift at the emergency department.World journal of emergency medicine · 2023Article
- Effect of Cloth Masks and N95 Respirators on Maximal Exercise Performance in Collegiate Athletes.International journal of environmental research and public health · 2022Article
- The tiny effects of respiratory masks on physiological, subjective, and behavioral measures under mental load in a randomized controlled trial.Scientific reports · 2021Article
- Feasibility Assessment of Wearable Respiratory Monitors for Ambulatory Inhalation Topography.International journal of environmental research and public health · 2021Article
- Face Masks and the Cardiorespiratory Response to Physical Activity in Health and Disease.Annals of the American Thoracic Society · 2021Review
- Powered air-purifying respirator use in healthcare: Effects on thermal sensations and comfort.Journal of occupational and environmental hygiene · 2017Article
- The Effect of Inspiratory Resistance on Exercise Performance and Perception in Moderate Normobaric Hypoxia.High altitude medicine & biology · 2017Article
- Project BREATHE - Prototype Respirator Evaluation Utilizing Newly Proposed Respirator Test Criteria.Journal of the International Society for Respiratory Protection · 2017Article
- Filter quality of electret masks in filtering 14.6-594 nm aerosol particles: Effects of five decontamination methods.PloS one · 2017Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Ten subjects underwent treadmill exercise at 5.6 km/h over one hour while wearing each of three identical appearing, cup-shaped, prototype filtering facepiece respirators that differed only in their filter resistances (3 mm, 6 mm, and 9 mm H2O pressure drop). There were no statistically significant differences between filtering facepiece respirators with respect to impact on physiological parameters (i.e., heart rate, respiratory rate, oxygen saturation, transcutaneous carbon dioxide levels, tympanic membrane temperature), pulmonary function variables (i.e., tidal volume, respiratory rate, volume of carbon dioxide production, oxygen consumption, or ventilation), and subjective ratings (i.e., exertion, thermal comfort, inspiratory effort, expiratory effort and overall breathing comfort). The nominal filter resistances of the prototype filtering facepiece respirators correspond to airflow resistances ranging from 2.1 - 6.6 mm H2O/L/s which are less than, or minimally equivalent to, previously reported values for the normal threshold for detection of inspiratory breathing resistance (6 - 7.6 mm H2O/L/sec). Therefore, filtering facepiece respirators with filter resistances at, or below, this level may not impact the wearer differently physiologically or subjectively from those with filter resistances only slightly above this threshold at low-moderate work rates over one hour.
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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.