Reliability of Intratester and Intertester Measurements Derived from an Instrumented Ankle Arthrometer

2003 ◽  
Vol 12 (3) ◽  
pp. 208-220 ◽  
Author(s):  
Tricia J. Hubbard ◽  
John E. Kovaleski ◽  
Thomas W. Kaminski
Keyword(s):  
Sports Medicine ◽  
Research Laboratory ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Medicine Research ◽  
Intraclass Correlation Coefficients ◽  
Type Design ◽  
Ankle Arthrometer ◽  
Significant Difference ◽  
History Of

Context:Measurement reliability is critical when new sports-medicine devices or techniques are developed.Objective:To determine the reliability of laxity measurements obtained from an instrumented ankle arthrometer.Design:Intratester reliability was examined using a test–retest design, and intertester reliability was assessed using the measurements recorded by 2 different examiners on a separate group of participants.Setting:Sports-medicine research laboratory.Participants:40 participants with no history of ankle injury, equally divided across the 2 studies.Measurements:Laxity measurements included anteroposterior (AP) displacement during loading to 125 N. Inversion–eversion (I–E) rotation was tested during loading to 4000 N-mm. The measures were analyzed using intraclass correlation coefficients (ICCs) and dependentttests.Results:Good to excellent ICCs (.80–.99) for intratester and intertester reliability. A significant difference in measures was observed between testers for both AP displacement and I–E rotation.Conclusions:Laxity measurements from an instrumented ankle arthrometer are reliable across test days and examiners

Using Pedometers to Estimate Ambulatory Physical Activity in Vietnam

2011 ◽  
Vol 8 (1) ◽  
pp. 52-61 ◽  
Author(s):  
Au Bich Thuy ◽  
Leigh Blizzard ◽  
Michael Schmidt ◽  
Costan Magnussen ◽  
Emily Hansen ◽  
...  
Keyword(s):  
Physical Activity ◽  
Concurrent Validity ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Population Based ◽  
Work Activities ◽  
Intraclass Correlation Coefficients ◽  
Significant Difference ◽  
Day Of The Week ◽  
Population Based Survey

Background:Pedometer measurement of physical activity (PA) has been shown to be reliable and valid in industrialized populations, but its applicability in economically developing Vietnam remains untested. This study assessed the feasibility, stability and validity of pedometer estimates of PA in Vietnam.Methods:250 adults from a population-based survey were randomly selected to wear Yamax pedometers and record activities for 7 consecutive days. Stability and concurrent validity were assessed using intraclass correlation coefficients (ICC) and Spearman correlation coefficients.Results:Overall, 97.6% of participants provided at least 1 day of usable recordings, and 76.2% wore pedometers for all 7 days. Only 5.2% of the sample participants were involved in work activities not measurable by pedometer. The number of steps increased with hours of wear. There was no significant difference between weekday and weekend in number of steps, and at least 3 days of recordings were required (ICC of the 3 days of recordings: men 0.96, women 0.97). Steps per hour were moderately correlated (men r = .42, women r = .26) with record estimates of total PA.Conclusions:It is feasible to use pedometers to estimate PA in Vietnam. The measure should involve at least 3 days of recording irrespective of day of the week.

Inter- and Intratester Reliability of Lower Extremity Circumference Measurements

1998 ◽  
Vol 7 (4) ◽  
pp. 300-306 ◽  
Author(s):  
Gary L. Harrelson ◽  
Deidre Leaver-Dunn ◽  
A. Louise Fincher ◽  
James D. Leeper
Keyword(s):  
Lower Extremity ◽  
High Reliability ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Joint Line ◽  
Measuring Device ◽  
Intraclass Correlation Coefficients ◽  
Tape Measure ◽  
Significant Difference ◽  
Male High School

The purpose of this study was to examine the inter- and intratester reliability of lower extremity circumference measurements obtained by two testers using the same tape measure and two different tape measures. Twenty-one male high school student-athletes participated in this study. Two testers measured lower extremity circumference at three sites using a standard flexible tape measure and a Lufkin tape measure with a Gulick spring-loaded handle attachment. Measurement sites were medial joint line, 20 cm above medial joint line, and 15 cm below medial joint line. Intraclass correlation coefficients were computed for inter- and intratester comparisons for each measuring device and each measurement site. Results indicated high reliability but a significant difference between the two tape measures. These findings indicate that the reliability of lower extremity circumference measurements is not influenced by tester experience and that the Lufkin tape measure with the Gulick handle attachment is the more accurate of the two tape measures.

scholarly journals Assessment of a generalizable methodology to assess learning from manikin-based simulation technology*

2014 ◽  
Vol 28 (1) ◽  
pp. 16-20 ◽  
Author(s):  
Dominic A. Giuliano ◽  
Marion McGregor
Keyword(s):  
Learning Outcomes ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Wisdom Of Crowds ◽  
Diverse Range ◽  
Intraclass Correlation Coefficients ◽  
Significant Difference ◽  
Assessment Procedures ◽  
The Impact

Objective This study combined a learning outcomes-based checklist and salient characteristics derived from wisdom-of-crowds theory to test whether differing groups of judges (diversity maximized versus expertise maximized) would be able to appropriately assess videotaped, manikin-based simulation scenarios. Methods Two groups of 3 judges scored 9 videos of interns managing a simulated cardiac event. The first group had a diverse range of knowledge of simulation procedures, while the second group was more homogeneous in their knowledge and had greater simulation expertise. All judges viewed 3 types of videos (predebriefing, postdebriefing, and 6 month follow-up) in a blinded fashion and provided their scores independently. Intraclass correlation coefficients (ICCs) were used to assess the reliability of judges as related to group membership. Scores from each group of judges were averaged to determine the impact of group on scores. Results Results revealed strong ICCs for both groups of judges (diverse, 0.89; expert, 0.97), with the diverse group of judges having a much wider 95% confidence interval for the ICC. Analysis of variance of the average checklist scores indicated no significant difference between the 2 groups of judges for any of the types of videotapes assessed (F = 0.72, p = .4094). There was, however, a statistically significant difference between the types of videos (F = 14.39, p = .0004), with higher scores at the postdebrief and 6-month follow-up time periods. Conclusions Results obtained in this study provide optimism for assessment procedures in simulation using learning outcomes-based checklists and a small panel of judges.

scholarly journals The Reliability of Portable Fixed Dynamometry During Hip and Knee Strength Assessments

2010 ◽  
Vol 45 (4) ◽  
pp. 349-356 ◽  
Author(s):  
Roger O. Kollock ◽  
James A. Onate ◽  
Bonnie Van Lunen
Keyword(s):  
Lower Extremity ◽  
Cruciate Ligament ◽  
Phase 1 ◽  
Intraclass Correlation ◽  
Knee Extensor ◽  
Correlation Coefficients ◽  
Phase 2 ◽  
Medicine Research ◽  
Intraclass Correlation Coefficients ◽  
Knee Strength

Abstract Context: Insufficient lower extremity strength may be a risk factor for lower extremity injuries such as noncontact anterior cruciate ligament tears. Therefore, clinicians need reliable instruments to assess strength deficiencies. Objective: To assess the intrarater, interrater, intrasession, and intersession reliability of a portable fixed dynamometer in measuring the strength of the hip and knee musculature. Design: Crossover study. Setting: Sports medicine research laboratory. Patients or Other Participants: Three raters (A, B, C) participated in this 2-phase study. Raters A and B tested 11 healthy college graduate students (2 men, 9 women) in phase 1. Raters A and C tested 26 healthy college undergraduate students (7 men, 19 women) in phase 2. Main Outcome Measure(s): The dependent variables for the study were hip adductor, hip abductor, hip flexor, hip extensor, hip internal rotator, hip external rotator, knee flexor, and knee extensor peak force. Results: The phase 1 intrasession intraclass correlation coefficients for sessions 1, 2, and 3 ranged from 0.88 to 0.99 (SEM  =  0.08–3.02 N), 0.85 to 0.99 (SEM  =  0.26–3.88 N), and 0.92 to 0.96 (SEM  =  0.52–2.76 N), respectively. Intraclass correlation coefficients ranged from 0.57 to 0.95 (SEM  =  1.72–13.15 N) for phase 1 intersession values, 0.70 to 0.94 (SEM  =  1.42–9.20 N) for phase 2 intrarater reliability values, and 0.69 to 0.88 (SEM  =  1.20–8.50 N) for phase 2 interrater values. Conclusions: The portable fixed dynamometer showed good to high intrasession and intersession reliability values for hip and knee strength. Intrarater and interrater reliability were fair to high, except for hip internal rotation, which showed poor reliability.

Dilatation of the Bile Duct in Patients after Cholecystectomy: A Retrospective Study

2014 ◽  
Vol 65 (1) ◽  
pp. 29-34 ◽  
Author(s):  
David Landry ◽  
An Tang ◽  
Jessica Murphy-Lavallée ◽  
Luigi Lepanto ◽  
Jean-Sébastien Billiard ◽  
...  
Keyword(s):  
Bile Duct ◽  
Hepatic Artery ◽  
Intraclass Correlation ◽  
Age Groups ◽  
Correlation Coefficients ◽  
Intraclass Correlation Coefficients ◽  
Retrospective Assessment ◽  
History Of ◽  
The Right ◽  
Age And Sex

Purpose Retrospective assessment of impact of cholecystectomy, age, and sex on bile duct (BD) diameter. Materials and Methods We retrospectively reviewed abdominal contrast-enhanced multidetector computed tomography and laboratory reports of 290 consecutive patients (119 men; mean age, 55.9 years) who presented without cholestasis to the emergency department of our institution between June 2009 and August 2010. BD diameters were measured in 3 locations, by 2 independent observers, twice, at 1-month intervals. Reproducibility and agreement were evaluated by intraclass correlation coefficients and Bland-Altman analyses. The effects of cholecystectomy, age, and sex on BD diameter were analysed with linear mixed models. Results BD diameter inter-reader reproducibility and agreement were excellent at the level of the right hepatic artery (intraclass correlation coefficient, 0.94). Sixty-one patients (21.0%) had a history of cholecystectomy. Among them, the 95th percentile of BD diameters at hepatic artery level was 7.9 mm (<50 years) and 12.3 mm (≥50 years). Among those without cholecystectomy, BD diameter was 6.2 mm (<50 years) and 7.7 mm (≥50 years). Cholecystectomy was associated with significantly larger BD diameters in both age groups ( P < .001). Older age was associated with larger BD diameters ( P = .004). Sex had no impact on BD diameter ( P = .842). Conclusion Patients after cholecystectomy may present with an enlarged BD unrelated to cholestasis. The BD diameter increases with age. Clinicians should rely on cholecystectomy status, age, and laboratory results to determine needs of further investigation.

scholarly journals The Transaxial Orientation Is Superior to Both the Short Axis and Horizontal Long Axis Orientations for Determining Right Ventricular Volume and Ejection Fraction Using Simpson's Method with Cardiac Magnetic Resonance

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Michael K. Atalay ◽  
Kevin J. Chang ◽  
David J. Grand ◽  
Shawn Haji-Momenian ◽  
Jason T. Machan ◽  
...  
Keyword(s):  
Cardiac Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ejection Fraction ◽  
Right Ventricular ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Ventricular Volume ◽  
Short Axis ◽  
Intraclass Correlation Coefficients ◽  
Significant Difference

We sought to determine which of the three orientations is the most reliable and accurate for quantifying right ventricular (RV) volume and ejection fraction (EF) by cardiac magnetic resonance using Simpson’s method. We studied 20 patients using short axis (SA), transaxial (TA), and horizontal long axis (HLA) orientations. Three readers independently traced RV endocardial contours at end-diastole and end-systole for each orientation. End-diastolic volumes (EDVs), end-systolic volumes (ESVs), and EF were calculated and compared with the 3D piecewise smooth subdivision surface (PSSS) method. The intraclass correlation coefficients among the 3 readers for EDV, ESV, and EF were 0.92, 0.82, and 0.42, respectively, for SA, 0.95, 0.92, and 0.67 for TA, and 0.85, 0.93, and 0.69 for HLA. For mean data there was no significant difference between TA and PSSS for EDV (−2.6%, 95% CI: −8.2 to 3.3%), ESV (−5.9%, −15.2 to 4.5%), and EF (1.7%, −1.5 to 4.9%). HLA was accurate for ESV (−8.9%, −18.5 to 1.8%) and EF (−0.7%, −3.8 to 2.5%) but significantly underestimated EDV (−9.8, −16.6 to −2.4%). SA was accurate for EDV (0.5%, −6.0 to 7.5%) but overestimated ESV (10.5%, 0.1 to 21.9%) and had poor interrater reliability for EF. Conclusions. The TA orientation provides the most reliable and accurate measures of EDV, ESV, and EF.

scholarly journals Reliability and Validity of Electro-Goniometric Range of Motion Measurements in Patients with Hand and Wrist Limitations

2016 ◽  
Vol 10 (1) ◽  
pp. 190-205 ◽  
Author(s):  
Siamak Bashardoust Tajali ◽  
Joy C. MacDermid ◽  
Ruby Grewal ◽  
Chris Young
Keyword(s):  
Intraclass Correlation ◽  
Reliability And Validity ◽  
Correlation Coefficients ◽  
Cross Sectional ◽  
Intraclass Correlation Coefficients ◽  
Significant Difference ◽  
Passive Flexion ◽  
Quick Dash ◽  
And Function ◽  
Limited Motion

Study Design: Cross-sectional reliability and validity study. Purpose: 1. To determine intrarater, interrater and inter instrument reliabilities and validity of two digital electro goniometry to measure active wrist/finger range of motions (ROMs) in patients with limited motion. 2. To determine intrarater and interrater reliabilities of digital goniometry to measure torques of PIP passive flexion of the index finger in patients with limited motion. Methods: The study was designed in a randomized block plan on 44 patients (24 women, 20 men) with limited wrist or hand motions. Two experienced raters measured active wrist ROMs, and active and passive index PIP flexion using two digital goniometers. All measures were repeated by one rater 2-5 days after the initial measurements. The reliability measures were analyzed using Intraclass Correlation Coefficients (ICCs) and the construct validity was determined by correlation coefficients analysis between sub measures of scores; patient rated pain and function (PRWE) and quick Disabilities of the Arm, Shoulder and Hand (quick DASH) scores. Results: The intrarater, interrater and inter instrument reliabilities were high in most ROM measures (range 0.64-0.97) for both types of electro-goniometers. The 95% limit of agreements and Bland and Altman plots did not show progressive changes. There was a significant difference in force application between the raters when performing passive ROM measures for PIP index, but the same rater produced consistent force. Most of the NK and J-Tech ROM measures were moderately correlated with the patient rated pain and function scores (range 0.32-0.63).

Risk Factors for Cognitive Aging in Adult Twins

1992 ◽  
Vol 41 (2-3) ◽  
pp. 187-195 ◽  
Author(s):  
K. Hayakawa ◽  
T. Shimizu ◽  
Y. Ohba ◽  
S. Tomioka
Keyword(s):  
Cognitive Aging ◽  
Environmental Influence ◽  
Digit Span ◽  
Block Design ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Adult Intelligence Scale ◽  
Intraclass Correlation Coefficients ◽  
Significant Difference ◽  
Mz Twins

AbstractMonozygotic (MZ) and dizygotic (DZ) twins in later adulthood were studied in order to examine genetic and environmental contributions to the decline of cognitive performance. In this study, 118 twin pairs took a comprehensive medical examination at a university hospital. Cognitive function was measured by the Wechsler Adult Intelligence Scale (WAIS). The intraclass correlation coefficients on Digit Span (D) and Digit Symbol (DS) subtests of the WAIS did not show any significant difference between MZ and DZ twins although Block Design (BD) showed a significant difference. The values of the intraclass correlation coefficients were mostly around 0.5 and showed significant within-pair similarity of test scores. The mean score of D, DS and BD declined with advancing age. The intraclass correlation coefficients for D, DS and BD were around 0.2 in the MZ twins reared apart, and around 0.6 in the MZ twins reared together. These results indicated a significant environmental influence on cognitive aging in later adulthood.

scholarly journals Comparison of Simulated and True Keratometry Measurements Using Swept-Source Optical Coherence Tomography and Dual Scheimpflug–Placido Imaging

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Elizabeth A. Urias ◽  
Efstathia Polychronopoulou ◽  
Rahul T. Pandit
Keyword(s):  
Chart Review ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Retrospective Chart Review ◽  
Corneal Surgery ◽  
Exclusion Criteria ◽  
Swept Source ◽  
Intraclass Correlation Coefficients ◽  
Significant Difference ◽  
Iolmaster 700

Purpose. To compare simulated and total keratometry and corneal astigmatism values between the IOLMaster 700 and Galilei G4 devices. Methods. A retrospective chart review was conducted for all patients undergoing phacoemulsification by a single surgeon (RTP) from March through September 2020 and who underwent imaging with both the IOLMaster 700 and Galilei G4. Exclusion criteria were prior corneal surgery, keratectatic diseases and inability to obtain a reliable image during image acquisition. Mean, flat, and steep keratometry values as well as astigmatism magnitude were compared. Results. A total of 200 eyes of 100 patients were included. Intraclass correlation coefficients (ICC) were moderate or high for all variables. Mean difference ± SD in SimK and TrueK between devices (G4-IOLM) was 0.05 ± 0.318 diopters and −1.1156 ± 0.438 diopters, respectively ( p < 0.05 for both). The IOLM measured steeper TrueK value than the G4. For SimK, there was a statistically significant difference between devices only for mean keratometry (K), whereas for TrueK, there were significant differences in flat K, steep K, and mean K. Astigmatism analysis revealed a difference in mean (±SD) SimK of 0.07 (±0.57) D at 94 degrees and in mean TrueK of 0.04 (±0.85) D at 108 degrees. Conclusion. Though there is overall good correlation between the IOLMaster 700 and Galilei G4 in SimK and astigmatism measurements, there is a significant difference in TrueK measurements, with the IOLM measuring steeper values by about 1.0 diopter as compared to the G4.

Interobserver Reliability Using the Phonetic Level Evaluation With Severely and Profoundly Hearing-Impaired Children

1991 ◽  
Vol 34 (5) ◽  
pp. 989-999 ◽  
Author(s):  
Stephanie Shaw ◽  
Truman E. Coggins
Keyword(s):  
Interrater Reliability ◽  
Interobserver Reliability ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Hearing Impaired ◽  
Intraclass Correlation Coefficients ◽  
Assessment Measure ◽  
Impaired Children ◽  
Speech Assessment ◽  
Hearing Impaired Children

This study examines whether observers reliably categorize selected speech production behaviors in hearing-impaired children. A group of experienced speech-language pathologists was trained to score the elicited imitations of 5 profoundly and 5 severely hearing-impaired subjects using the Phonetic Level Evaluation (Ling, 1976). Interrater reliability was calculated using intraclass correlation coefficients. Overall, the magnitude of the coefficients was found to be considerably below what would be accepted in published behavioral research. Failure to obtain acceptably high levels of reliability suggests that the Phonetic Level Evaluation may not yet be an accurate and objective speech assessment measure for hearing-impaired children.

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