Repeatability and reproducibility of distraction indices in Pennhip examinations of the hip joint in dogs

2006 ◽  
Vol 54 (3) ◽  
pp. 387-392 ◽  
Author(s):  
M. M. D. Ginja ◽  
A. J. A. Ferreira ◽  
M. Silvestre ◽  
J. M. Gonzalo-Orden ◽  
M. P. Llorens-Pena
Keyword(s):  
Confidence Interval ◽  
Correlation Coefficient ◽  
Hip Joint ◽  
Measurement Method ◽  
Intraclass Correlation ◽  
Computer Software ◽  
Hip Joints ◽  
Measurement Session ◽  
Analysis Center ◽  
Repeatability And Reproducibility

Repeatability and reproducibility of Distraction Index (DI) measurements in the PennHIP method were evaluated in 100 dogs. The PennHIP distraction views sent to the PennHIP Analysis Center (PAC) were duplicated, digitalised, and identified with a code, and an adequate computer software was used for DI measurements. One examiner performed two DI measurement sessions, evaluating individually 200 hip joints. The scoring repeatability and reproducibility were estimated calculating the Intraclass Correlation Coefficient (ICC) between the two DI measurement sessions and between the second DI measurement session and the DI in PAC reports, respectively. The ICC for repeatability was 0.97 [95% confidence interval (CI), 0.96 to 0.98], and the ICC for reproducibility was 0.95 (95% CI, 0.93 to 0.96). The results suggest that the DI measurement method described is repeatable and can reproduce the PAC reports with confidence. Distraction indices measured in different PennHIP studies, using this DI measurement method and performed by trained researchers, can be considered interchangeable.

scholarly journals Distraction index measurement on the dog's hip joint using a dedicated software

2020 ◽  
Vol 72 (4) ◽  
pp. 1241-1247 ◽  
Author(s):  
S. Alves-Pimenta ◽  
A. Santana ◽  
J. Martins ◽  
B. Colaço ◽  
L. Gonçalves ◽  
...  
Keyword(s):  
Computer Software ◽  
Software Tool ◽  
Measurement Tool ◽  
Specific Training ◽  
Hip Joints ◽  
Index Measurement ◽  
Analysis Center ◽  
Good Repeatability ◽  
Repeatability And Reproducibility ◽  
Measurement Repeatability

ABSTRACT The aim of this study was to test the accuracy of a new automated computer software tool for the assessment of passive hip laxity. The hip laxity was estimated using the dedicated computer software by two blinded evaluators, one previously trained and one without specific training for distraction index measurement, in two independent sessions using 230 hip joints from 115 dogs that underwent screening for passive hip laxity using the distraction view. Previously, all of these radiographs were sent to PennHIP Analysis Center for an official distraction index record. The measurement repeatability of the two sessions was adequate for both evaluators. The reproducibility of the official distraction index measurement, mean distraction index±standard deviation 0.44±0.15, was adequate (P>0.05) for the trained evaluator, 0.44±0.15, and non-adequate (P<0.05), for the non-trained evaluator 0.47±0.17. The distraction index measurement tool proposed can be used with confidence for hip laxity evaluation by trained evaluators, as it provided good repeatability and reproducibility of official reports. The simplicity of the process described leads to a less time-consuming and more affordable procedure.

scholarly journals A Quantitative Comparison of Multispectral Refraction Topography and Autorefractometer in Young Adults

2021 ◽  
Vol 8 ◽  
Author(s):  
Yunru Liao ◽  
Zhenlan Yang ◽  
Zijing Li ◽  
Rui Zeng ◽  
Jing Wang ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Pearson Correlation ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
High Agreement ◽  
Intraclass Correlation Coefficients ◽  
Repeatability And Reproducibility ◽  
The Mean

Purpose: Purpose of this study is to evaluate the measuring consistency of central refraction between multispectral refraction topography (MRT) and autorefractometry.Methods: This was a descriptive cross-sectional study including subjects in Sun Yat-sen Memorial Hospital from September 1, 2020, to December 31, 2020, ages 20 to 35 years with a best corrected visual acuity of 20/20 or better. All patients underwent cycloplegia, and the refractive status was estimated with autorefractometer, experienced optometrist and MRT. We analyzed the central refraction of the autorefractometer and MRT. The repeatability and reproducibility of values measured using both devices were evaluated using intraclass correlation coefficients (ICCs).Results: A total of 145 subjects ages 20 to 35 (290 eyes) were enrolled. The mean central refraction of the autorefractometer was −4.69 ± 2.64 diopters (D) (range −9.50 to +4.75 D), while the mean central refraction of MRT was −4.49 ± 2.61 diopters (D) (range −8.79 to +5.02 D). Pearson correlation analysis revealed a high correlation between the two devices. The intraclass correlation coefficient (ICC) also showed high agreement. The intrarater and interrater ICC values of central refraction were more than 0.90 in both devices and conditions. At the same time, the mean central refraction of experienced optometrist was −4.74 ± 2.66 diopters (D) (range −9.50 to +4.75D). The intra-class correlation coefficient of central refraction measured by MRT and subjective refraction was 0.939.Conclusions: Results revealed that autorefractometry, experienced optometrist and MRT show high agreement in measuring central refraction. MRT could provide a potential objective method to assess peripheral refraction.

scholarly journals Comparison of Reliability of Norberg Angle and Distraction Index as Measurements for Hip Laxity in Dogs

2020 ◽  
Vol 33 (04) ◽  
pp. 274-278
Author(s):  
Julius Klever ◽  
Andreas Brühschwein ◽  
Silvia Wagner ◽  
Sven Reese ◽  
Andrea Meyer-Lindenberg
Keyword(s):  
Correlation Coefficient ◽  
Clinical Significance ◽  
Intraclass Correlation Coefficient ◽  
Hip Joint ◽  
Interobserver Reliability ◽  
Intraclass Correlation ◽  
Joint Laxity ◽  
Intraobserver Reliability ◽  
Level Of Experience ◽  
Norberg Angle

Abstract Objective The main purpose of the study was to compare reliability of measurements for the evaluation of hip joint laxity in 59 dogs. Materials and Methods Measurement of the distraction index (DI) of the PennHIP method and the Norberg angle (NA) of the Fédération Cynologique Internationale (FCI) scoring scheme as well as scoring according to the FCI scheme and the Swiss scoring scheme were performed by three observers at different level of experience. For each dog, two radiographs were acquired with each method by the same operator to evaluate intraoperator-reliability. Results Intraoperator-reliability was slightly better for the NA compared with the DI with an intraclass correlation coefficient (ICC) of 0.962 and 0.892 respectively. The ICC showed excellent results in intraobserver-reliability and interobserver-reliability for both the NA (ICC 0.975; 0.969) and the DI (ICC 0.986; 0.972). Thus, the NA as well as the DI can be considered as reliable measurements. The FCI scheme and the Swiss scoring scheme provide similar reliability. While the FCI scheme seems to be slightly more reliable in experienced observers (Kappa FCI 0.687; Kappa Swiss 0.681), the Swiss scoring scheme had a noticeable better reliability for the unexperienced observer (Kappa FCI 0.465; Kappa Swiss 0.514). Clinical Significance The Swiss scoring scheme provides a structured guideline for the interpretation of hip radiographs and can thus be recommended to unexperienced observers.

Speech perception, real-ear measurements and self-perceived hearing impairment after remote and face-to-face programming of hearing aids: A randomized single-blind agreement study

2019 ◽  
pp. 1357633X1988354 ◽  
Author(s):  
Frederic Venail ◽  
Marie C Picot ◽  
Gregory Marin ◽  
Sylvain Falinower ◽  
Jacques Samson ◽  
...  
Keyword(s):  
Speech Perception ◽  
Confidence Interval ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Hearing Aids ◽  
Hearing Aid ◽  
Intraclass Correlation ◽  
Speech Understanding ◽  
Face To Face ◽  
Single Blind

Introduction Current literature does not provide strong evidence that remote programming of hearing aids is effective, despite its increasing use by audiologists. We tested speech perception outcomes, real-ear insertion gain, and changes in self-perceived hearing impairment after face-to-face and remote programming of hearing aids in a randomized multicentre, single-blind crossover study. Methods Adult experienced hearing aid users were enrolled during routine follow-up visits to audiology clinics. Hearing aids were programmed both face to face and remotely, then participants randomly received either the face-to-face or remote settings in a blinded manner and were evaluated 5 weeks later. Participants then received the other settings and were evaluated 5 weeks later. Results Data from 52 out of 60 participants were analysed. We found excellent concordance in performance of hearing aids programmed face to face and remotely for speech understanding in quiet (phonetically balanced kindergarten test – intraclass correlation coefficient of 0.92 (95% confidence interval: 0.87–0.95)), and good concordance in performance for speech understanding in noise (phonetically balanced kindergarten +5 dB signal-to-noise ratio – intraclass correlation coefficient of 0.71 (95% confidence interval: 0.55–0.82)). Face-to-face and remote programming took 10 minutes (±2.9) and 10 minutes (±2.8), respectively. Real-ear insertion gains were highly correlated for input sound at 50, 65 and 80 dB sound pressure levels. The programming type did not affect the abbreviated profile of hearing aid questionnaire scores. Conclusions In experienced hearing aid users, face-to-face and remote programming of hearing aids give similar results in terms of speech perception, with no increase in the time spent on patients’ care and no difference in self-reported hearing benefit. ClinicalTrials.gov Identifier NCT02589561

scholarly journals Intra- and inter-rater reliability in a comparative study of cross-sectional and spiral computed tomography pelvimetry methods

2019 ◽  
Vol 8 (6) ◽  
pp. 205846011985518 ◽  
Author(s):  
Erika Phexell ◽  
Anna Åkesson ◽  
Marcus Söderberg ◽  
Anetta Bolejko
Keyword(s):  
Computed Tomography ◽  
Radiation Dose ◽  
Confidence Interval ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Intraclass Correlation ◽  
Measurement Reliability ◽  
Cross Sectional ◽  
Rater Reliability ◽  
Short Spiral

Background Different low-dose computed tomography (CT) pelvimetry methods can be used to evaluate the size of birth canal before delivery. CT pelvimetry might generate an acceptable low fetal radiation dose but its measurement accuracy is unknown. Purpose To investigate intra- and inter-rater measurement reliability of cross-sectional and two spiral CT pelvimetry methods: standard spiral and short spiral. Material and Methods Ten individuals (age ≥60 years, body mass index ≥30 kg/m2) having a CT scan of the abdomen also had CT pelvimetry scans. Three radiologists made independent measurements of each pelvimetry method on two occasions and also in consensus for a reference pelvimetry computed from the standard-dose CT scan of the abdomen. Inter- and intra-rater reliability was analyzed by intraclass correlation coefficient. Results Measurements in the short spiral pelvimetry demonstrated excellent intra- and inter-rater reliability, intraclass correlation coefficient ≥0.93, and good to excellent 95% confidence interval 0.87–0.99. Corresponding results of the standard spiral and cross-sectional pelvimetry showed good to excellent intraclass correlation coefficient ≥0.85 and ≥0.76, and 95% confidence interval was least good and moderate 0.73–0.98 and 0.59–0.97, respectively. Intraclass correlation coefficient between reference pelvimetry and other CT methods showed analogous results. Conclusion The short spiral pelvimetry demonstrated high and best reliability in comparison to other methods. Standard spiral method showed also good measurement reliability but the short spiral pelvimetry generates lower fetal radiation dose. This method might be suitable for measurements at narrow pelvis. Patient acceptance and attitude to CT pelvimetry should be investigated.

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.

US assessment of hip joint synovitis in rheumatic diseases: A comparison with MR imaging

2003 ◽  
Vol 44 (1) ◽  
pp. 72-78
Author(s):  
I. Soini ◽  
A. Kotaniemi ◽  
H. Kautiainen ◽  
M. Kauppi
Keyword(s):  
Mr Imaging ◽  
Rheumatic Disease ◽  
Rheumatic Diseases ◽  
Hip Joint ◽  
False Positive ◽  
Gold Standard ◽  
Intraclass Correlation ◽  
Hip Joints ◽  
Mri Evaluation ◽  
Rheumatic Patients

Purpose: To assess the significance of ultrasonography (US) in detecting hip joint synovitis in patients with rheumatic diseases. Material and Methods: Forty patients with rheumatic disease and suspected hip joint synovitis underwent MRI and US of the hip joint. In addition to the throughout MRI evaluation, the anterior collum-capsule distance (CCD) was determined by both MRI and US. Thirteen healthy volunteers were examined with MRI to establish the criteria for normal findings in MRI when classifying hip joints to those with synovitis and those without. MRI was used as a gold standard. Results: Synovitis was found using MRI in 31 hips of 22 patients (9 patients had bilateral synovitis). The intraclass correlation was 0.61 between MRI and US in measuring CCD. In classifying hip joint synovitis with US, the sensitivity of the method was 87% and specificity 42%, when the CCD criterion for synovitis was determined to be ≥7 mm. If the cut-off point was raised to 9 mm, the sensitivity decreased to 61% while specificity increased to 94%. A difference in CCD of ≥1 mm between the hips as an additional criterion for synovitis increased the number of false-positive findings. Conclusion: Measurement of CCD with US proved to be a rather inaccurate method to point out synovitis in rheumatic patients when using MRI as a reference. The main reason for this result was the thickened capsule, which US could not differentiate from a thickened synovium.

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