scholarly journals Reliability of Peak Running Velocity Obtained on the Track Field in Runners of Different Performance Levels

2021 ◽  
Vol 12 ◽  
Author(s):  
Francisco de Assis Manoel ◽  
Cecília Segabinazi Peserico ◽  
Fabiana Andrade Machado
Keyword(s):  
Correlation Coefficient ◽  
Coefficient Of Variation ◽  
High Reliability ◽  
Intraclass Correlation ◽  
Statistical Test ◽  
Limits Of Agreement ◽  
Running Performance ◽  
Performance Levels ◽  
Recreational Runners ◽  
Trained Runners

The aim of this study was to verify the reliability of peak running velocity obtained on the track field (Vpeak_TF) in runners of different performance levels. 39 male endurance runners were divided into two groups: trained runners (TR; n = 22; 10-km time running performance of 35.2 ± 1.7 min), and recreational runners (RR; n = 17; 10-km time running performance of 51.3 ± 4.8 min). They performed three maximal incremental running tests on the official track field (400 m), with an interval of 1 week between trials to determine the reliability of Vpeak_T. The Vpeak_TF showed high reliability, presenting an intraclass correlation coefficient and coefficient of variation of 0.97 and 1.28%, and 0.90 and 1.24% for TR and RR, respectively. Both TR and RR showed lowest bias and limits of agreement between test and retest (Vpeak_TF1 and Vpeak_TF2). In addition, there was no statistical test-retest difference for Vpeak_TF. In addition, the HR and RPE submaximal values were reliable for both TR and RR. Therefore, the Vpeak_TF showed high reliability in both TR and RR. These findings reinforce that the protocol for determining Vpeak_TF, using increments of 1 km h–1 every 3 min is reliable regardless of the performance level of the runners.

scholarly journals Evaluation of Central Corneal Thickness Using Corneal Dynamic Scheimpflug Analyzer Corvis ST and Comparison with Pentacam Rotating Scheimpflug System and Ultrasound Pachymetry in Normal Eyes

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Ayong Yu ◽  
Weiqi Zhao ◽  
Giacomo Savini ◽  
Zixu Huang ◽  
Fangjun Bao ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Coefficient Of Variation ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Intraclass Correlation ◽  
Limits Of Agreement ◽  
Corvis St ◽  
Ultrasound Pachymetry ◽  
Repeatability And Reproducibility ◽  
High Repeatability

Purpose.To assess the repeatability and reproducibility of central corneal thickness (CCT) measurements by corneal dynamic Scheimpflug analyzer Corvis ST in normal eyes and compare the agreement with Pentacam rotating Scheimpflug System and ultrasound pachymetry.Methods.84 right eyes underwent Corvis ST measurements performed by two operators. The test-retest repeatability (TRT), within-subject coefficient of variation (CoV), and intraclass correlation coefficient (ICC) were used to evaluate the intraoperator repeatability and interoperator reproducibility. CCT measurements also were obtained from Pentacam and ultrasound pachymetry by the first operator. The agreement between the three devices was evaluated with 95% limits of agreement (LoA) and Bland-Altman plots.Results.Corvis ST showed high repeatability as indicated by TRT ≤ 13.0 μm, CoV < 0.9%, and ICC > 0.97. The interoperator reproducibility was also excellent. The CoV was <0.9%, and ICC was >0.97. Corvis ST showed significantly lower values than Pentacam and ultrasound pachymetry (P<0.001). The 95% LoA between Corvis ST and Pentacam or ultrasound pachymetry were −15.8 to 9.5 μm and −27.9 to 12.3 μm, respectively.Conclusions.Corvis ST showed excellent repeatability and interoperator reproducibility of CCT measurements in normal eyes. Corvis ST is interchangeable with Pentacam but not with ultrasound pachymetry.

Prediction of distance running performances of female runners using nomograms

2021 ◽  
Author(s):  
Lucie Lerebourg ◽  
Brice Guignard ◽  
Ghazi Racil ◽  
Mohamed Chedly Jlid ◽  
Eric Held ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Training Programs ◽  
Distance Running ◽  
Limits Of Agreement ◽  
Running Performance ◽  
Precision And Accuracy ◽  
High Level ◽  
Very High

This study examined the validity, precision and accuracy of the predictions of distance running performances in female runners from three nomograms. Official rankings of French women for the 3000-m, 5000-m, and 10,000-m track-running events from 2005 to 2019 were examined. Only female runners who performed in the three distance events within the same year were included (n=158). Each performance over any distance was predicted using the three nomograms from the two other performances. The 3000-m, 5000-m and 10,000-m performances were 11min17 s± 1min20 s, 19min29 s ± 2min20 s, 41min18 s ± 5min7 s, respectively. No difference was found between the actual and predicted running performances regardless of the nomogram (p>0.05). All predicted running performances were significantly correlated with the actual ones, with a very high correlation coefficient (p<0.001; r>0.90). Bias and 95% limits of agreement were acceptable because, whatever the nomogram, they were less than or equal to -0.0±6.2% on the 3000-m, 0.0±3.7% on the 5000-m, and 0.1±9.3% on the 10,000-m. The study confirms the validity of the three nomograms to predict track-running performance with a high level of accuracy. The predictions from these nomograms are similar and may be used in training programs and competitions.

Reliability and validity of short Beck Hopelessness Scale in psychological autopsy study among Chinese rural elderly

2019 ◽  
Vol 32 (4) ◽  
pp. 525-531
Author(s):  
Zhenyu Ma ◽  
Qiuping He ◽  
Guanghui Nie ◽  
Cunxian Jia ◽  
Liang Zhou
Keyword(s):  
Correlation Coefficient ◽  
High Reliability ◽  
Common Factor ◽  
Intraclass Correlation ◽  
Reliability And Validity ◽  
Rural Elderly ◽  
Cluster Sampling ◽  
Psychological Autopsy ◽  
Autopsy Study ◽  
Beck Hopelessness Scale

ABSTRACTBackground:Older adults represent the segment of population most exposed to the risk of suicide nearly everywhere in the world. Previous studies showed that hopelessness was an important risk factor for suicide.Aims:This study aimed to evaluate the reliability and validity of the four-item Beck Hopelessness Scale (BHS-4) in psychological autopsy study among Chinese rural elderly.Method:Two-stage stratified cluster sampling method was used to select research sites. Using case-control psychological autopsy study, face-to-face interviews were conducted to collected information.Results:A total of 242 elderly suicide deaths and 242 matched living comparisons were investigated, including 135 males and 107 females for each group. Intraclass Correlation Coefficients (ICC) of the controls were 0.682-0.713. The median score of BHS-4 among suicides was significantly higher than that among controls. The corrected correlation coefficient between items and total score were 0.184-0.723. Cronbach’s Alphas coefficient was 0.834. Only one common factor was precipitated by exploratory factor analysis and the cumulative variance contribution rates were 59.558% for suicides and 52.722% for living controls. The correlation coefficient between hopelessness and depression were 0.481 among suicide death and 0.617 among living controls.Conclusion:The information provided by the informants through psychological autopsy method had high reliability to reflect the actual situation of suicides and controls. BHS-4 has good reliability and validity among Chinese rural elderly suicides. It is suitable for psychological autopsy study among Chinese rural elderly.

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 Intrasession repeatability and intersession reproducibility of peripapillary OCTA vessel parameters in non-glaucomatous and glaucomatous eyes

2020 ◽  
pp. bjophthalmol-2020-317181
Author(s):  
Jae Chang Lee ◽  
Dominic J Grisafe ◽  
Bruce Burkemper ◽  
Brenda R Chang ◽  
Xiao Zhou ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Longitudinal Study ◽  
Correlation Coefficient ◽  
Coefficient Of Variation ◽  
Optical Coherence Tomography Angiography ◽  
Intraclass Correlation ◽  
Signal Strength ◽  
Vessel Area ◽  
Optical Microangiography ◽  
Perfusion Density

ObjectiveTo compare intrasession repeatability versus intersession reproducibility of the peripapillary vessel parameters using optical microangiography–based optical coherence tomography angiography (OCTA) in non-glaucomatous and glaucomatous eyes.MethodsIn an observational, longitudinal study, peripapillary OCTA scans were collected to evaluate intrasession repeatability and intersession reproducibility using within-eye coefficient of variation (CVW) and intraclass correlation coefficient (ICC). Images were quantified using a custom research–oriented quantification software calculating vessel area density (VAD) and flux and a commercially developed, clinic-oriented quantification software (Cirrus 11.0, Carl Zeiss Meditec) calculating perfusion density (PD) and flux index (FI). Effect of signal strength on the reliability of OCTA parameters was also evaluated.ResultsAmong 120 non-glaucomatous eyes, intrasession CVW were 4.2% for VAD, 5.3% for flux, 1.5% for PD and 2.0% for FI. The intersession CVW were 6.5% for VAD, 8.0% for flux, 2.0% for PD and 3.2% for FI. The intrasession ICC ranged from 0.928 to 0.945, and intersession ICC ranged from 0.811 to 0.866. From 118 glaucomatous eyes, intrasession CVW was 9.0% for VAD, 10.3% for flux, 1.7% for PD and 2.3% for FI. The intersession CVW was 12.1% for VAD, 14.2% for flux, 2.3% for PD and 3.5% for FI. The intrasession ICC ranged from 0.904 to 0.972, and intersession ICC ranged from 0.855 to 0.955. Signal strength was significantly positively associated with OCTA vessel parameters (p<0.0001) for both groups.ConclusionPeripapillary OCTA vessel parameters had greater intrasession repeatability compared to intersession reproducibility in both non-glaucomatous and glaucomatous eyes. The built-in commercially developed quantification software demonstrated greater agreement than the custom research–oriented quantification software.

scholarly journals Development and reliability of the Korean version of the Feeding Abilities Assessment

2019 ◽  
Vol 32 (1) ◽  
pp. 69-74
Author(s):  
Seul Gi Koo ◽  
Hae Yean Park ◽  
Jongbae Kim ◽  
Areum Han
Keyword(s):  
Correlation Coefficient ◽  
Internal Consistency ◽  
Content Validity ◽  
Assessment Tool ◽  
High Reliability ◽  
Intraclass Correlation ◽  
Rater Reliability ◽  
Retest Reliability ◽  
Korean Version ◽  
Test Retest Reliability

Objective The purpose of this study is to introduce a standardised assessment tool by verifying the reliability of the translated Korean version of the Feeding Abilities Assessment (K-FAA), which was developed to suit Korean culture. Methods The research subjects were 65 patients with dementia living in nursing homes. The K-FAA was completed by verifying the suitability of translation and reverse translation. The validity of the K-FAA was established through content validity, while its reliability was analysed based on internal consistency reliability for the items, test–retest reliability and inter-rater reliability. Results The content validity index determined, based on the assessment of professors, occupational therapists, and nurses, was more than .70. Cronbach’s α was more than .929, showing good internal consistency. A test–retest reliability of .884 was derived using Pearson’s correlation coefficient (p < .01), and an inter-rater reliability of .800 was derived using the kappa coefficients; intraclass correlation coefficient was .897, which also indicated good reliability. Conclusion The K-FAA was modified to fit the Korean domestic situation, and this assessment had high reliability. Therefore, K-FAA can evaluate the feeding ability of patients with dementia. Future studies should focus on providing evidence-based data to maintain or supplement the feeding ability of patients with dementia in Korea.

scholarly journals Validating a common tick survey method: cloth-dragging and line transects

2020 ◽  
Vol 83 (1) ◽  
pp. 131-146
Author(s):  
Pia L. Kjellander ◽  
Malin Aronsson ◽  
Ulrika A. Bergvall ◽  
Josep L. Carrasco ◽  
Madeleine Christensson ◽  
...  
Keyword(s):  
Developmental Stage ◽  
Correlation Coefficient ◽  
Coefficient Of Variation ◽  
Intraclass Correlation ◽  
Survey Method ◽  
Nymphal Stage ◽  
Tick Abundance ◽  
Line Transects ◽  
Tick Survey ◽  
Tick Counts

AbstractCloth-dragging is the most widely-used method for collecting and counting ticks, but there are few studies of its reliability. By using cloth-dragging, we applied a replicated line transects survey method, in two areas in Sweden with different Ixodes ricinus tick-densities (low at Grimsö and high at Bogesund) to evaluate developmental stage specific repeatability, agreement and precision in estimates of tick abundance. ‘Repeatability’ was expressed as the Intraclass Correlation Coefficient (ICC), ‘agreement’ with the Total Deviation Index (TDI) and ‘precision’ by the coefficient of variation (CV) for a given dragging distance. Repeatability (ICC) and agreement (TDI) were higher for the most abundant instar (nymphs) and in the area of higher abundance. At Bogesund tick counts were higher than at Grimsö and so also repeatability, with fair to substantial ICC estimates between 0.22 and 0.75, and TDI ranged between 1 and 44.5 counts of difference (thus high to moderate agreement). At Grimsö, ICC was poor to moderate and ranged between 0 and 0.59, whereas TDI remained low with estimates lower or equal to 1 count (thus high agreement). Despite a 100-fold lower abundance at Grimsö, the same level of precision for nymphs could be achieved with a 70% increase of dragging effort. We conclude that the cloth-dragging technique is useful for surveying ticks’ and primarily to estimate abundance of the nymphal stage, whereas it rarely will be recommended for larvae and adults.

scholarly journals Animal Welfare Assessment in Sows and Piglets—Introduction of a New German Protocol for Farm’s Self-Inspection and of New Animal-Based Indicators for Piglets

Agriculture ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 506
Author(s):  
Lena Friedrich ◽  
Joachim Krieter ◽  
Nicole Kemper ◽  
Irena Czycholl
Keyword(s):  
Correlation Coefficient ◽  
Intraclass Correlation ◽  
Rank Correlation ◽  
Limits Of Agreement ◽  
Individual Level ◽  
Advantages And Disadvantages ◽  
Spearman’S Rank Correlation ◽  
Spearman’S Rank Correlation Coefficient ◽  
Carpal Joint ◽  
Welfare Quality

We compare the Kuratorium für Technik und Bauwesen in der Landwirtschaft e.V. (KTBL) protocol, a German protocol for sows and piglets developed for farm’s self-inspection, to the Welfare Quality® protocol for sows and piglets (WQ). The KTBL protocol introduces new indicators for piglets to be assessed at pen level (face lesions, carpal joint lesions, undersized animals). The reliability of their assessment at pen level was analysed by comparison to assessments at individual level. Both protocols were applied by one observer in 65 farm visits. The protocols are highly similar, although the composition varies (WQ protocol: focus on animal-based, KTBL protocol: focus on management-based indicators). Consequently, the WQ protocol detected more welfare issues (e.g., welfare issues related to appropriate behaviour: 62.9% (WQ) vs. 21.0% (KTBL protocol)). The comparison between pen and individual level of piglets’ indicators was determined using Spearman’s rank correlation coefficient (RS), intraclass correlation coefficient (ICC) and limits of agreement (LoA). Carpal joint lesions and undersized animals (RS 0.73/0.80 ICC 0.55/0.57 LoA −0.12 to 0.03/−0.01 to 0.01) are reliably assessed at pen level but face lesions (RS 0.19 ICC 0.18 LoA −0.42 to 0.03) are not. Concluding, we present advantages and disadvantages of the KTBL protocol and introduce indicators for piglets which may enhance existing protocols.

Repeatability and reproducibility of corneal biomechanical parameters derived from Corvis ST

2019 ◽  
Vol 30 (6) ◽  
pp. 1287-1294
Author(s):  
Nermin Serbecic ◽  
Sven Beutelspacher ◽  
Lovro Markovic ◽  
Abhijit Sina Roy ◽  
Rohit Shetty
Keyword(s):  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Coefficient Of Variation ◽  
Intraclass Correlation ◽  
Diurnal Changes ◽  
Good Reliability ◽  
Good Repeatability ◽  
Repeatability And Reproducibility ◽  
Biomechanical Parameters ◽  
High Intraclass Correlation Coefficient

Introduction: The aim of this study was to evaluate repeatability and reproducibility of newly calculated biomechanical parameters of the cornea, developed by our research group. Methods: One eye from each of the 23 healthy subjects was measured three times consecutively, three times at different daytimes and on three different days. The within-subject standard deviation and coefficient of variation, as well as the intraclass correlation coefficient, were calculated for every parameter in each group. Results: Excellent repeatability and reproducibility (coefficient of variation < 5%, intraclass correlation coefficient > 0.75) was found for corrected values measured at A1, HC, and A2 time points (2nd A2 Time, 2nd A1 Time, 2nd HC Time, 2nd HC Def Amp and 2nd A1 Def Amp). Corneal-specific stiffness parameters, which showed good repeatability and reliability, were DA_cor (coefficient of variation = 4.02%, intraclass correlation coefficient = 0.919), KcLinear (coefficient of variation = 4.03%, intraclass correlation coefficient = 0.895), areaForceCornea (coefficient of variation = 3.34%, intraclass correlation coefficient = 0.853) and E2 (coefficient of variation = 4.1%, intraclass correlation coefficient = 0.78). Overall, most parameters fell into the category of good reliability (high intraclass correlation coefficient) and poor reproducibility (low coefficient of variation), including all the parameters describing extraocular deformation (DA_ext, AEPvED, AUC EDef, areaForceExtra, Kg and μg). Comparing the coefficient of variation values for intrasession, intersession and daytime measurements, there were no indices for diurnal changes. Conclusion: Most parameters showed good repeatability and reliability. The extraocular stiffness parameters showed poor reproducibility. KcLinear can serve as a very reliable and repeatable indicator of corneal stiffness.

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