Intraclass correlation ≈ Intraclass correlation
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Intraclass correlation – A discussion and demonstration of basic features Open
A re-analysis of intraclass correlation (ICC) theory is presented together with Monte Carlo simulations of ICC probability distributions. A partly revised and simplified theory of the single-score ICC is obtained, together with an alternat…
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What Is the Test-Retest Reliability of Common Task-Functional MRI Measures? New Empirical Evidence and a Meta-Analysis Open
Identifying brain biomarkers of disease risk is a growing priority in neuroscience. The ability to identify meaningful biomarkers is limited by measurement reliability; unreliable measures are unsuitable for predicting clinical outcomes. M…
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Test–retest reliability, validity, and minimum detectable change of visual analog, numerical rating, and verbal rating scales for measurement of osteoarthritic knee pain Open
All the three scales had excellent test-retest reliability. However, the VAS was the most reliable, with the smallest errors in the measurement of OA knee pain.
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Keep Calm and Learn Multilevel Logistic Modeling: A Simplified Three-Step Procedure Using Stata, R, Mplus, and SPSS Open
This paper aims to introduce multilevel logistic regression analysis in a simple and practical way. First, we introduce the basic principles of logistic regression analysis (conditional probability, logit transformation, odds ratio). Secon…
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Reliability from α to ω: A tutorial. Open
Reliability is a fundamental problem for measurement in all of science. Although defined in multiple ways, and estimated in even more ways, the basic concepts seem straightforward and need to be understood by practitioners as well as metho…
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Psychological Science Needs a Standard Practice of Reporting the Reliability of Cognitive-Behavioral Measurements Open
Psychological science relies on behavioral measures to assess cognitive processing; however, the field has not yet developed a tradition of routinely examining the reliability of these behavioral measures. Reliable measures are essential t…
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Reliability of conditioned pain modulation: a systematic review Open
A systematic literature review was undertaken to determine if conditioned pain modulation (CPM) is reliable. Longitudinal, English language observational studies of the repeatability of a CPM test paradigm in adult humans were included. Tw…
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The reliability and validity of ultrasound to quantify muscles in older adults: a systematic review Open
This review evaluates the reliability and validity of ultrasound to quantify muscles in older adults. The databases PubMed, Cochrane, and Cumulative Index to Nursing and Allied Health Literature were systematically searched for studies. In…
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The reliability and validity of PHQ-9 in patients with major depressive disorder in psychiatric hospital Open
Background To assess the reliability and validity of Patient Health Questionnaire-9 (PHQ-9) for patients with major depressive disorder (MDD) and to assess the feasibility of its use in psychiatric hospitals in China. Methods One hundred n…
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Inertial Measurement Units for Clinical Movement Analysis: Reliability and Concurrent Validity Open
The aim of this study was to investigate the reliability and concurrent validity of a commercially available Xsens MVN BIOMECH inertial-sensor-based motion capture system during clinically relevant functional activities. A clinician with n…
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The Minimal Important Difference in Physical Activity in Patients with COPD Open
The MID after pulmonary rehabilitation lies between 600 and 1100 steps.day-1. The clinical importance of this change is supported by a reduced risk for hospital admission in those patients with more than 600 steps improvement.
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Actigraphy-based sleep estimation in adolescents and adults: a comparison with polysomnography using two scoring algorithms Open
The two actigraphs provided comparable and accurate data compared to PSG, although both poorly identified wake episodes (i.e., had low specificity). Use of actigraphy scoring algorithm influenced the mean bias and level of agreement in sle…
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Accuracy of a screening tool for medication adherence: A systematic review and meta-analysis of the Morisky Medication Adherence Scale-8 Open
[This corrects the article DOI: 10.1371/journal.pone.0187139.].
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Evaluation of smartphone‐based testing to generate exploratory outcome measures in a phase 1 Parkinson's disease clinical trial Open
Background : Ubiquitous digital technologies such as smartphone sensors promise to fundamentally change biomedical research and treatment monitoring in neurological diseases such as PD, creating a new domain of digital biomarkers. Objectiv…
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Psychometric properties of gross motor assessment tools for children: a systematic review Open
Objective Gross motor assessment tools have a critical role in identifying, diagnosing and evaluating motor difficulties in childhood. The objective of this review was to systematically evaluate the psychometric properties and clinical uti…
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Evaluating the credibility of anchor based estimates of minimal important differences for patient reported outcomes: instrument development and reliability study Open
Objective To develop an instrument to evaluate the credibility of anchor based minimal important differences (MIDs) for outcome measures reported by patients, and to assess the reliability of the instrument. Design Instrument development a…
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The Intersectional Discrimination Index: Development and validation of measures of self-reported enacted and anticipated discrimination for intercategorical analysis Open
Final InDI measures include the 9-item InDI-A, 9-item InDI-D, and 13-item InDI-M, for which we have found initial evidence of construct validity and reliability. In combination with sociodemographic information, the InDI measures can be us…
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Validation of the Regicor Short Physical Activity Questionnaire for the Adult Population Open
The REGICOR short questionnaire is reliable, valid, and sensitive to detect changes in moderate and vigorous PA. This questionnaire could be used in daily clinical practice and epidemiological studies.
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Within-subject Pooling of Biological Samples to Reduce Exposure Misclassification in Biomarker-based Studies Open
Within-subject pooling limits attenuation bias without increasing assay costs. Simulation extrapolation and regression calibration further limit bias, compared with the pooling approach, but increase assay costs.
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Single-Leg Jump-Landing Stabilization Times in Subjects With Functionally Unstable Ankles Open
Context: Factors contributing to functional ankle instability may cause individuals with the condition to land from a jump differently than those with stable ankles.
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Measures of Listening Effort Are Multidimensional Open
The good ICC suggests that poor test reliability is not the reason for the lack of correlation between measures. We have demonstrated that measures traditionally used as indicators of listening effort tap into multiple underlying dimension…
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Repeatability and Reproducibility of Superficial Macular Retinal Vessel Density Measurements Using Optical Coherence Tomography Angiography En Face Images Open
Vessel length density and PD of the superficial retinal vasculature can be obtained from OCTA images with high levels of repeatability and reproducibility but can vary with scan pattern and location.
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Cluster randomized trials with a small number of clusters: which analyses should be used? Open
Small-sample corrections or variance-weighted cluster-level analyses are recommended for the analysis of continuous outcomes in CRTs with a small number of clusters. The use of these corrections should be incorporated into the sample size …
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Exploring the Validity of the 14-Item Mediterranean Diet Adherence Screener (MEDAS): A Cross-National Study in Seven European Countries around the Mediterranean Region Open
This study provides comprehensive validation of the 14-item Mediterranean Diet Adherence Screener (14-MEDAS) in an adult population from Greece (GR), Portugal (PT), Italy (IT), Spain (SP), Cyprus (CY), Republic of North Macedonia (NMK), an…
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Conducting correlation analysis: important limitations and pitfalls Open
The correlation coefficient is a statistical measure often used in studies to show an association between variables or to look at the agreement between two methods. In this paper, we will discuss not only the basics of the correlation coef…
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Correlation and agreement: overview and clarification of competing concepts and measures. Open
Agreement and correlation are widely-used concepts that assess the association between variables. Although similar and related, they represent completely different notions of association. Assessing agreement between variables assumes that …
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A multicentre validation of the 1-min sit-to-stand test in patients with COPD Open
Our aim was to comprehensively validate the 1-min sit-to-stand (STS) test in chronic obstructive pulmonary disease (COPD) patients and explore the physiological response to the test. We used data from two longitudinal studies of COPD patie…
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Abdominal Imaging with Contrast-enhanced Photon-counting CT: First Human Experience Open
The performance of PCD showed no statistically significant difference compared with EID when the abdomen was evaluated in a conventional scan mode. PCD provides spectral information, which may be used for material decomposition.
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Influence of inter-observer delineation variability on radiomics stability in different tumor sites Open
Background: Radiomics is a promising methodology for quantitative analysis and description of radiological images using advanced mathematics and statistics. Tumor delineation, which is still often done manually, is an essential step in rad…
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Real-world heart rate norms in the Health eHeart study Open
Emerging technology allows patients to measure and record their heart rate (HR) remotely by photoplethysmography (PPG) using smart devices like smartphones. However, the validity and expected distribution of such measurements are unclear, …