ArticlePeerJ2018
Reliability and concurrent validity of the iPhone
Article in PeerJ, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 2 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
22 citing papers in PubMed, 2 syntheses or guidelines pooled it, 49 citations in OpenAlex.
- Analysis of the Active Measurement Systems of the Thoracic Range of Movements of the Spine: A Systematic Review and a Meta-Analysis.Sensors (Basel, Switzerland) · 2022Pooled it
- Reliability and validity of clinically accessible smartphone applications to measure joint range of motion: A systematic review.PloS one · 2019Pooled it
- A Smartphone Platform for Remote Motor Fitness Assessment and AI-Generated Personalized Exercise Programs for Older Adults: Randomized Controlled Trial.Journal of medical Internet research · 2025Trial
- Effects of adding thoracic spine exercises to routine soccer training on spinal alignment and mobility in professional male soccer players: a randomized controlled study.BMC sports science, medicine & rehabilitation · 2026Article
- Smartphone-Assessed Single-Leg Deadlift Stability is Associated with Sprint Velocity in Youth Soccer Players: A Cross-Sectional Study.Journal of musculoskeletal & neuronal interactions · 2026Article
- Temporal discrimination at the neck region is associated with severity of cervical dystonia.Scientific reports · 2025Article
- Wearable sensor technologies for individuals with back pain: a scoping review.Pain management · 2025Article
- Relationships and Within-Group Differences in Physical Attributes and Golf Performance in Elite Amateur Female Players.Life (Basel, Switzerland) · 2024Article
- Assessing validity of thoracic spine rotation range of motion measurement methods: comparison of magnetic resonance imaging and clinical measurements.Journal of physical therapy science · 2024Article
- Relationship Between Lumbar Locked Rotation, Trunk Rotation During Pitching, and Pitch Velocity in High School Baseball Players.International journal of sports physical therapy · 2024Article
- Reliability and Validity of Visual Estimation in Determining Thorax Rotation Mobility using the Quadruped Lumbar-Locked Position.International journal of sports physical therapy · 2024Article
- Reliability and Validity of a Smartphone Device and Clinical Tools for Thoracic Spine Mobility Assessments.Sensors (Basel, Switzerland) · 2023Article
- Reliability and Concurrent Validity of a Markerless, Single Camera, Portable 3D Motion Capture System for Assessment of Glenohumeral Mobility.International journal of sports physical therapy · 2023Article
- Clinical reliability and usability of smartphone goniometers for hip range of motion measurement.Journal of physical therapy science · 2022Article
- Rapid measurement of thoracolumbar kyphosis with the integrated inclinometer of a smartphone: a validity and reliability study.Scientific reports · 2022Article
- Reliability and concurrent validity of mobile health technology for patient self-monitoring in physical rehabilitation.JSES international · 2022Article
- Reliability and validity of lower limb joint range of motion measurements using a smartphone.Nagoya journal of medical science · 2022Article
- Article
- Smartphone and Tablet Software Apps to Collect Data in Sport and Exercise Settings: Cross-sectional International Survey.JMIR mHealth and uHealth · 2021Article
- Smartphone application technique for localising magnetically controlled growth rod actuators: the Oxford Magnetic Counter App Technique (TOMCAT).European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2020Article
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 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundSeveral water-based sports (swimming, surfing and stand up paddle boarding) require adequate thoracic mobility (specifically rotation) in order to perform the appropriate activity requirements. The measurement of thoracic spine rotation is problematic for clinicians due to a lack of convenient and reliable measurement techniques. More recently, smartphones have been used to quantify movement in various joints in the body; however, there appears to be a paucity of research using smartphones to assess thoracic spine movement. Therefore, the aim of this study is to determine the reliability (intra and inter rater) and validity of the iPhone
methodsA total of thirty participants were recruited for this study. Thoracic spine rotation ROM was measured using both the current clinical gold standard, a universal goniometer (UG) and the Smart Phone Compass app. Intra-rater and inter-rater reliability was determined with a Intraclass Correlation Coefficient (ICC) and associated 95% confidence intervals (CI). Validation of the Compass app in comparison to the UG was measured using Pearson's correlation coefficient and levels of agreement were identified with Bland-Altman plots and 95% limits of agreement.
resultsBoth the UG and Compass app measurements both had excellent reproducibility for intra-rater (ICC 0.94-0.98) and inter-rater reliability (ICC 0.72-0.89). However, the Compass app measurements had higher intra-rater reliability (
conclusionThis study reveals that the iPhone
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.