scholarly journals Reliability and concurrent validity of the iPhone® Compass application to measure thoracic rotation range of motion (ROM) in healthy participants

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4431 ◽  
Author(s):  
James Furness ◽  
Ben Schram ◽  
Alistair J. Cox ◽  
Sarah L. Anderson ◽  
Justin Keogh
Keyword(s):  
Correlation Coefficient ◽  
Thoracic Spine ◽  
Concurrent Validity ◽  
Measurement Techniques ◽  
Intraclass Correlation ◽  
Smart Phone ◽  
The Body ◽  
Rater Reliability ◽  
Healthy Participants

Background Several 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® app (Compass) when assessing thoracic spine rotation ROM in healthy individuals. Methods A 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. Results Both 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 (ICC = 0.96 − 0.98; 95% CI [0.93–0.99]; vs. ICC = 0.94 − 0.98; 95% CI [0.88–0.99]) and inter-rater reliability (ICC = 0.87 − 0.89; 95% CI [0.74–0.95] vs. ICC = 0.72 − 0.82; 95% CI [0.21–0.94]). A strong and significant correlation was found between the UG and the Compass app, demonstrating good concurrent validity (r = 0.835, p < 0.001). Levels of agreement between the two devices were 24.8° (LoA –9.5°, +15.3°). The UG was found to consistently measure higher values than the compass app (mean difference 2.8°, P < 0.001). Conclusion This study reveals that the iPhone® app (Compass) is a reliable tool for measuring thoracic spine rotation which produces greater reproducibility of measurements both within and between raters than a UG. As a significant positive correlation exists between the Compass app and UG, this supports the use of either device in clinical practice as a reliable and valid tool to measure thoracic rotation. Considering the levels of agreement are clinically unacceptable, the devices should not be used interchangeably for initial and follow up measurements.

scholarly journals Evaluation of intra- and inter-rater reliability and concurrent validity of the Italian version of the Jebsen–Taylor Hand Function Test in adults with rheumatoid arthritis

Hand Therapy ◽  
2019 ◽  
Vol 24 (2) ◽  
pp. 48-54 ◽  
Author(s):  
Andrea Savona ◽  
Luca Ferralis ◽  
Marco Saffioti ◽  
Marco Tofani ◽  
Marta Nobilia ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Correlation Coefficient ◽  
Concurrent Validity ◽  
Hand Function ◽  
Intraclass Correlation ◽  
Dominant Hand ◽  
Italian Version ◽  
Rater Reliability ◽  
Function Test ◽  
Pearson's Correlation

Introduction In rheumatoid arthritis, a reduction in hand function can lead to a decrease in health, with a consequent limitation of daily life activities and restriction in social participation. Evaluation plays a decisive role in the functional recovery process and in rehabilitation programs. The Jebsen–Taylor Hand Function Test is one of the most widely used non-diagnosis-specific assessment tools in rehabilitation. The aim of the study was to evaluate the intra-rater and inter-rater reliability and concurrent validity of the Italian version of the Jebsen–Taylor Hand Function Test (JTHFT-IT) in a population with rheumatoid arthritis. Methods The test’s reliability and validity were assessed by following international guidelines. Its internal consistency and intra- and inter-rater reliability were examined using Cronbach’s alpha coefficient and the intraclass correlation coefficient, respectively. Its concurrent validity was evaluated using Pearson’s correlation coefficient with a dynamometer instrument. Results The test was given to 108 people with rheumatoid arthritis. Cronbach’s alpha reported a value of 0.91 for the dominant hand and 0.87 for the non-dominant hand. Intra- and inter-rater reliability were evaluated with a subgroup of 30 individuals. Intraclass correlation coefficients ranged from 0.46 to 1.00 in the dominant and non-dominant hands. Pearson’s correlation between subtests and the dynamometer ranged from –0.14 to –0.59. Conclusions The present study supports the use of the JTHFT-IT as a measure of hand functionality in people with rheumatoid arthritis. It is an important tool for Italian professionals and it can be useful both in clinical practice to evaluate improvement after rehabilitation treatments and for research in hand rehabilitation.

scholarly journals High concurrent validity between digital and analogue algometers to measure pressure pain thresholds in healthy participants and people with migraine: a cross-sectional study

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
René F. Castien ◽  
Michel W. Coppieters ◽  
Tom S. C. Durge ◽  
Gwendolyne G. M. Scholten-Peeters
Keyword(s):  
Concurrent Validity ◽  
Tibialis Anterior Muscle ◽  
Intraclass Correlation ◽  
Cephalic Region ◽  
Limits Of Agreement ◽  
Temporal Muscle ◽  
Pain Thresholds ◽  
Pressure Pain ◽  
Pressure Pain Thresholds ◽  
Healthy Participants

Abstract Background Pressure pain thresholds (PPTs) are commonly assessed to quantify mechanical sensitivity in various conditions, including migraine. Digital and analogue algometers are used, but the concurrent validity between these algometers is unknown. Therefore, we assessed the concurrent validity between a digital and analogue algometer to determine PPTs in healthy participants and people with migraine. Methods Twenty-six healthy participants and twenty-nine people with migraine participated in the study. PPTs were measured interictally and bilaterally at the cephalic region (temporal muscle, C1 paraspinal muscles, and trapezius muscle) and extra-cephalic region (extensor carpi radialis muscle and tibialis anterior muscle). PPTs were first determined with a digital algometer, followed by an analogue algometer. Intraclass correlation coefficients (ICC3.1) and limits of agreement were calculated to quantify concurrent validity. Results The concurrent validity between algometers in both groups was moderate to excellent (ICC3.1 ranged from 0.82 to 0.99, with 95%CI: 0.65 to 0.99). Although PPTs measured with the analogue algometer were higher at most locations in both groups (p < 0.05), the mean differences between both devices were less than 18.3 kPa. The variation in methods, such as a hand-held switch (digital algometer) versus verbal commands (analogue algometer) to indicate when the threshold was reached, may explain these differences in scores. The limits of agreement varied per location and between healthy participants and people with migraine. Conclusion The concurrent validity between the digital and analogue algometer is excellent in healthy participants and moderate in people with migraine. Both types of algometer are well-suited for research and clinical practice but are not exchangeable within a study or patient follow-up.

scholarly journals A study of the validity and reliability of the Brazilian version of the Body Shape Questionnaire (BSQ) among adolescents

2009 ◽  
Vol 9 (3) ◽  
pp. 331-338 ◽  
Author(s):  
Maria Aparecida Conti ◽  
Táki Athanássios Cordás ◽  
Maria do Rosário Dias de Oliveira Latorre
Keyword(s):  
Body Image ◽  
Nutritional Status ◽  
Correlation Coefficient ◽  
Internal Consistency ◽  
Body Shape ◽  
Discriminant Validity ◽  
Total Population ◽  
Intraclass Correlation ◽  
The Body ◽  
Validity And Reliability

OBJECTIVES: to produce evidence of the validity and reliability of the Body Shape Questionnaire (BSQ) - a tool for measuring an individual's attitude towards his or her body image. METHODS: the study covered 386 young people of both sexes aged between 10 and 18 from a private school and used self-applied questionnaires and anthropometric evaluation. It evaluated the internal consistency, the discriminant validity for differences from the means, according to nutritional status (underweight, eutrophic, overweight and obese), the concurrent validity by way of Spearman's correlation coefficient between the scale and the Body Mass Index (BMI), the waist-hip circumference ratio (WHR) and the waist circumference (WC). Reliability was tested using Wilcoxon's Test, the intraclass correlation coefficient and the Bland-Altman figures. RESULTS: the BSQ displayed good internal consistency (±=0.96) and was capable of discriminating among the total population, boys and girls, according to nutritional status (p<0.001). It correlated with the BMI (r=0.41; p<0.001), WHR (r=-0.10; p=0.043) and WC (r=0.24; p<0.001) and its reliability was confirmed by intraclass correlation (r=0.91; p<0.001) for the total population. The questionnaire was easy to understand and could be completed quickly. CONCLUSIONS: the BSQ presented good results, thereby providing evidence of its validity and reliability. It is therefore recommended for evaluation of body image attitudes among adolescents.

scholarly journals Adaptation and Psychometric Evaluation of the Chinese Counseling Competencies Scale-Revised

2021 ◽  
Vol 12 ◽  
Author(s):  
Wei Xia ◽  
William Ho Cheung Li ◽  
Tingna Liang ◽  
Yuanhui Luo ◽  
Laurie Long Kwan Ho ◽  
...  
Keyword(s):  
Concurrent Validity ◽  
Convergent Validity ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Psychometric Evaluation ◽  
Counseling Competencies ◽  
Counselors In Training ◽  
Rater Reliability ◽  
Retest Reliability ◽  
Test Retest Reliability

Objectives: This study conducted a linguistic and psychometric evaluation of the Chinese Counseling Competencies Scale-Revised (CCS-R).Methods: The Chinese CCS-R was created from the original English version using a standard forward-backward translation process. The psychometric properties of the Chinese CCS-R were examined in a cohort of 208 counselors-in-training by two independent raters. Fifty-three counselors-in-training were asked to undergo another counseling performance evaluation for the test-retest. The confirmatory factor analysis (CFA) was conducted for the Chinese CCS-R, followed by internal consistency, test-retest reliability, inter-rater reliability, convergent validity, and concurrent validity.Results: The results of the CFA supported the factorial validity of the Chinese CCS-R, with adequate construct replicability. The scale had a McDonald's omega of 0.876, and intraclass correlation coefficients of 0.63 and 0.90 for test-retest reliability and inter-rater reliability, respectively. Significantly positive correlations were observed between the Chinese CCS-R score and scores of performance checklist (Pearson's γ = 0.781), indicating a large convergent validity, and knowledge on drug abuse (Pearson's γ = 0.833), indicating a moderate concurrent validity.Conclusion: The results support that the Chinese CCS-R is a valid and reliable measure of the counseling competencies.Practice implication: The CCS-R provides trainers with a reliable tool to evaluate counseling students' competencies and to facilitate discussions with trainees about their areas for growth.

scholarly journals Equation Córdoba: A Simplified Method for Estimation of Body Fat (ECORE-BF)

2019 ◽  
Vol 16 (22) ◽  
pp. 4529 ◽  
Author(s):  
Molina-Luque ◽  
Romero-Saldaña ◽  
Álvarez-Fernández ◽  
Bennasar-Veny ◽  
Álvarez-López ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Body Fat ◽  
Intraclass Correlation ◽  
The Body ◽  
Second Phase ◽  
Fat Percentage ◽  
Daily Work ◽  
Two Phases ◽  
New Equation

Background: Many methods for measuring body fat have been developed, but applications in clinical settings are limited. For this reason, researchers have tried to identify different formulas for its estimation but most of are hard to incorporate into daily work due to the variability in population and difficulty of use. The aim of this study was to develop and validate a new equation for the simplified estimation of body fat using the Clínica Universidad de Navarra – Body Adiposity Estimator (CUN-BAE) as a reference. Methods: This research was conducted in two phases. In the first, the new body fat estimation equation was developed. The developed equation was validated in the second phase. Pearson’s linear correlation, raw and adjusted linear regressions, the intraclass correlation coefficient, and Bland–Altman graphs were used. Results: The variables that best adjusted the body fat percentage were age, sex, and the Napierian logarithm of Body Mass Index (LnBMI), forming the Equation Córdoba for Estimation of Body Fat (ECORE-BF) model. In its validation, the model presented correlation values of 0.994, an intraclass correlation coefficient of 0.960, with the Bland–Altman graph indicating means differences of 1.82 with respect to the estimation with the CUN-BAE. Nevertheless, although the aim was to simplify the CUN-BAE, the main limitation of this study is that a gold standard, such as air displacement plethysmography (ADP) or dual-energy X-ray absorptiometry (DXA), was not used. Conclusions: The proposed equation (ECORE-BF) simplified the CUN-BAE and provided a precise method, respecting the principle of parsimony, for the calculation of body fat.

scholarly journals Intra-rater reliability of transversus abdominis measurement by a novice examiner: Comparison of “freehand” to “probe force device” method of real-time ultrasound imaging

Ultrasound ◽  
2019 ◽  
Vol 27 (3) ◽  
pp. 156-166 ◽  
Author(s):  
Vanessa L Kennedy ◽  
Carol A Flavell ◽  
Kenji Doma
Keyword(s):  
Measurement Error ◽  
Real Time ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Coefficient Of Variation ◽  
Repeated Measures ◽  
Intraclass Correlation ◽  
Transversus Abdominis ◽  
Rater Reliability ◽  
Transverse Abdominis

A “free hand” real-time-ultrasound method is commonly applied to measure transversus abdominis. Potentially, this increases transversus abdominis measurement error due to uncontrolled variability in probe to skin force, inclination, and roll, particularly for novice examiners. This single-group repeated-measures reliability study compared the intra-rater reliability of transversus abdominis thickness and activation measurement by a novice examiner between free hand and a standardized probe force device method. The examiner captured ultrasound videos of transversus abdominis in a single session in healthy participants ( n =  33). Free hand ultrasound featured uncontrolled probe force, inclination, and roll, while probe force device method ultrasound standardized these parameters. Images of transversus abdominis at rest and contracted were measured and transversus abdominis activation calculated. Intraclass correlation coefficient, coefficient of variation, standard error of measurement, and worthwhile differences were calculated. The probe force device method resulted in greater reliability (intraclass correlation coefficient = 0.75–0.96) and lower measurement error (coefficient of variation = 8.89–28.7%) compared to free hand (intraclass correlation coefficient = 0.63–0.93; coefficient of variation = 6.52–29.4%). Reliability was good for all measurements except free hand TrA-C, which was moderate. TrA-C had the lowest reliability, followed by contracted thickness of the transverse abdominis, with resting thickness of the transverse abdominis being highest. Worthwhile differences were lower using a probe force device method versus free hand for resting thickness of the transverse abdominis and contracted thickness of the transverse abdominis and similar for TrA-C. Standardization using probe force device method ultrasound to measure transversus abdominis improved intra-rater reliability in a novice examiner. Use of a probe force device method is recommended to improve reliability through reduced sources of measurement error. Probe force device method intra- and inter-rater reliability in examiners of varying experience, in clinical populations, and to visualize other structures merits exploration.

scholarly journals Validity and reliability of assessing diaphragmatic mobility by area on X-rays of healthy subjects

2018 ◽  
Vol 44 (3) ◽  
pp. 220-226 ◽  
Author(s):  
Aline Pedrini ◽  
Márcia Aparecida Gonçalves ◽  
Bruna Estima Leal ◽  
Michelle Gonçalves de Souza Tavares ◽  
Wellington Pereira Yamaguti ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Intraclass Correlation ◽  
X Rays ◽  
Altman Analysis ◽  
Validity And Reliability ◽  
Anthropometric Parameters ◽  
Rater Reliability ◽  
Bland Altman Analysis ◽  
Left Hemidiaphragm ◽  
The Right

ABSTRACT Objective: To investigate the concurrent validity, as well as the intra- and inter-rater reliability, of assessing diaphragmatic mobility by area (DMarea) on chest X-rays of healthy adults. Methods: We evaluated anthropometric parameters, pulmonary function, and diaphragmatic mobility in 43 participants. Two observers (rater A and rater B) determined diaphragmatic mobility at two time points. We used Pearson’s correlation coefficient to evaluate the correlation between DMarea and the assessment of diaphragmatic mobility by distance (DMdist). To evaluate intra- and inter-rater reliability, we used the intraclass correlation coefficient (ICC [2,1]), 95% CI, and Bland-Altman analysis. Results: A significant correlation was found between the DMarea and DMdist methods (r = 0.743; p < 0.0001). For DMarea, the intra-rater reliability was found to be quite high for the right hemidiaphragm (RHD)-ICC (2,1) = 0.92 (95% CI: 0.86-0.95) for rater A and ICC (2,1) = 0.90 (95% CI: 0.84-0.94) for rater B-and the left hemidiaphragm (LHD)-ICC (2,1) = 0.96 (95% CI: 0.93-0.97) for rater A and ICC (2,1) = 0.91 (95% CI: 0.81-0.95) for rater B-(p < 0.0001 for all). Also for DMarea, the inter-rater reliability was found to be quite high for the first and second evaluations of the RHD-ICC (2,1) = 0.99 (95% CI: 0.98-0.99) and ICC (2,1) = 0.95 (95% CI: 0.86-0.97), respectively-and the LHD-ICC (2,1) = 0.99 (95% CI: 0.98-0.99) and ICC (2,1) = 0.94 (95% CI: 0.87-0.97)-(p < 0.0001 for both). The Bland-Altman analysis showed good agreement between the mobility of the RHD and that of the LHD. Conclusions: The DMarea method proved to be a valid, reliable measure of diaphragmatic mobility.

scholarly journals The Brazilian version of the Neuropsychiatric Inventory-Clinician rating scale (NPI-C): reliability and validity in dementia

2013 ◽  
Vol 25 (9) ◽  
pp. 1503-1511 ◽  
Author(s):  
Florindo Stella ◽  
Orestes Vicente Forlenza ◽  
Jerson Laks ◽  
Larissa Pires de Andrade ◽  
Michelle A. Ljubetic Avendaño ◽  
...  
Keyword(s):  
Concurrent Validity ◽  
Convergent Validity ◽  
Rating Scale ◽  
Neuropsychiatric Symptoms ◽  
Intraclass Correlation ◽  
Reliability And Validity ◽  
Correlation Coefficients ◽  
Neuropsychiatric Inventory ◽  
Rater Reliability ◽  
Clinician Rating

ABSTRACTBackground:Patients with dementia may be unable to describe their symptoms, and caregivers frequently suffer emotional burden that can interfere with judgment of the patient's behavior. The Neuropsychiatric Inventory-Clinician rating scale (NPI-C) was therefore developed as a comprehensive and versatile instrument to assess and accurately measure neuropsychiatric symptoms (NPS) in dementia, thereby using information from caregiver and patient interviews, and any other relevant available data. The present study is a follow-up to the original, cross-national NPI-C validation, evaluating the reliability and concurrent validity of the NPI-C in quantifying psychopathological symptoms in dementia in a large Brazilian cohort.Methods:Two blinded raters evaluated 312 participants (156 patient-knowledgeable informant dyads) using the NPI-C for a total of 624 observations in five Brazilian centers. Inter-rater reliability was determined through intraclass correlation coefficients for the NPI-C domains and the traditional NPI. Convergent validity included correlations of specific domains of the NPI-C with the Brief Psychiatric Rating Scale (BPRS), the Cohen-Mansfield Agitation Index (CMAI), the Cornell Scale for Depression in Dementia (CSDD), and the Apathy Inventory (AI).Results:Inter-rater reliability was strong for all NPI-C domains. There were high correlations between NPI-C/delusions and BPRS, NPI-C/apathy-indifference with the AI, NPI-C/depression-dysphoria with the CSDD, NPI-C/agitation with the CMAI, and NPI-C/aggression with the CMAI. There was moderate correlation between the NPI-C/aberrant vocalizations and CMAI and the NPI-C/hallucinations with the BPRS.Conclusion:The NPI-C is a comprehensive tool that provides accurate measurement of NPS in dementia with high concurrent validity and inter-rater reliability in the Brazilian setting. In addition to universal assessment, the NPI-C can be completed by individual domains.

scholarly journals Reliability and concurrent validity of an alternative method of lateral lumbar range of motion in athletes

2016 ◽  
Vol 28 (1) ◽  
pp. 23-26 ◽  
Author(s):  
M Hecimovich
Keyword(s):  
Lumbar Spine ◽  
Range Of Motion ◽  
Concurrent Validity ◽  
Pearson Correlation ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Index Test ◽  
Low Back ◽  
Detectable Change ◽  
Rater Reliability

Background: Cricket bowling involves combined spinalmovements of side bending and rotation and, consequently, injuryto the low back is a common problem. Therefore the assessmentof lumbar spine kinematics has become a routine component inpreseason screening. This includes static measurement of lateralspinal flexion as asymmetrical range of motion may predispose anathlete to low back injury.Objectives: This study examined intra-rater reliability andconcurrent validity of the fingertip-to-floor distance test (FFD)when compared to a criterion range of motion measure.Methods: Thirty-four junior-level cricket players aged 13‑16years were recruited. Lumbar spine lateral flexion was measuredsimultaneously with the fingertip-to-floor distance test and digitalinclinometry methods. Relative and absolute intra-rater reliabilitywere investigated with intraclass correlation coefficients (ICC3,1)of agreement, standard error of measurement (SEM) estimates,Bland and Altman bias estimates and 95% limits of agreement,respectively. The concurrent validity of the fingertip-to-floordistance test, compared to digital inclinometry measures, wasexamined with Pearson correlation coefficients.Results: Intra-rater reliability demonstrated substantial agreementfor both measures (ICC3,1 > 0.84). The fingertip-to-floor distancetest SEM values ranged from 1.71‑2.01 cm with an estimatedminimum detectable change (MDC) threshold of 4.73‑5.55 cm.The inclinometry SEM values ranged from 1.00‑1.09° withminimal detectable change estimates of 2.77‑3.01°. There werestrong correlations between the index test and criterion measureoutcomes (r > 0.84, p < 0.001).Conclusions: This study’s results support the intra-rater reliabilityand concurrent validity of the finger-to-floor distance test,suggesting it to be a suitable surrogate measure for lumbar lateralflexion testing

scholarly journals Validation of rapid shallow breathing index displayed by the ventilator compared to the standard technique in patients with readiness for weaning

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Nuttapol Rittayamai ◽  
Natwipha Ratchaneewong ◽  
Pirat Tanomsina ◽  
Withoon Kongla
Keyword(s):  
Correlation Coefficient ◽  
Spontaneous Breathing Trial ◽  
Measurement Techniques ◽  
Intraclass Correlation ◽  
Standard Technique ◽  
Time Points ◽  
Average Value ◽  
Rapid Shallow Breathing Index ◽  
Shallow Breathing ◽  
Rapid Shallow Breathing

Abstract Background Rapid shallow breathing index (RSBI) is the most commonly used parameter for predicting weaning outcome. Measurement of RSBI by Wright spirometer (RSBIstandard) is the standard method in routine clinical practice. Data specific to the accuracy and reliability of the RSBI value displayed by the ventilator (RSBIvent) are scarce. Accordingly, this study aimed to evaluate the association between the average value of RSBIvent at different time points and RSBIstandard, and to assess the accuracy and reliability of these two RSBI measurement techniques. Methods This prospective cohort study included mechanically ventilated patients who were ready to wean. At the beginning of spontaneous breathing trial using the flow-by method, RSBI was measured by two different techniques at the same time, including: (1) Wright spirometer (breathing frequency/average tidal volume in 1 min) (RSBIstandard), and (2) the values displayed on the ventilator at 0, 15, 30, 45, and 60 s (RSBIvent). Results Forty-seven patients were enrolled. The RSBIvent value was significantly higher than the RSBIstandard value for every comparison. According to Spearman’s correlation coefficient (r) and intraclass correlation coefficient (ICC), the average value of RSBI from 5 time points (0, 15, 30, 45, and 60 s) showed the best correlation with the standard technique (r = 0.76 [P < 0.001], and ICC = 0.79 [95% CI 0.61–0.88], respectively). Bland–Altman plot also showed the best agreement between RSBIstandard and the RSBIvent value averaged among 5 time points (mean difference − 17.1 breaths/min/L). Conclusions We found that the ventilator significantly overestimates the RSBI value compared to the standard technique by Wright spirometer. The average RSBIvent value among 5 time points (0, 15, 30, 45, and 60 s) was found to best correlate with RSBIstandard.

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