Intra- and inter-observer reproducibility of r-ASRM endometriosis classification system and its components, using edited videotaped laparoscopic procedures

2021 ◽  
pp. 228402652110580
Author(s):  
Roya Padmehr ◽  
Khadijeh Shadjoo ◽  
Arash Mohazzab ◽  
Atefeh Gorgin ◽  
Roxana Kargar ◽  
...  
Keyword(s):  
Kappa Statistic ◽  
Classification Systems ◽  
Observer Agreement ◽  
Deep Endometriosis ◽  
Laparoscopic Procedures ◽  
Ideal System ◽  
Disease Staging ◽  
Fit For Purpose ◽  
Acceptable Agreement ◽  
The Ideal

Several classification systems have been proposed for endometriosis but the search for the ideal system is ongoing. While the most commonly used system has historically been r-ASRM, this system is not fit for purpose, particularly for deep endometriosis. In order to explore strategies to devise a new system and learn from problems with the existing ones, this study was designed to assess the reproducibility of each component in r-ASRM and its total score using videotaped laparoscopic procedures. Two surgeons independently scored 64 edited videos of laparoscopic endometriosis procedure, twice. Using the Kappa statistic, the agreement of the scores given was analyzed. r-ASRM showed a moderate inter-observer agreement (ƙ = 0.503) and good intra-observer agreement (ƙ = 0.774 and 0.682 for scorer 1 and 2 respectively) for overall disease staging. The agreement for each component of the system, however, was highly variable. The least agreement was observed for the peritoneum with ƙ = 0.157 and ƙ = 0.362 respectively for inter-observer and intra-observer. The lowest intra-observer agreement was seen for cul-de-sac for scorer 2 (ƙ = 0.382). Whilst the overall rASRM shows acceptable agreement between two scorers, this agreement seems to be the product of inconsistent scoring for each component.

scholarly journals Repeatability, Completion Time, and Predictive Ability of Four Diabetes-Related Foot Ulcer Classification Systems

2021 ◽  
pp. 193229682098654
Author(s):  
Chanika Alahakoon ◽  
Malindu Fernando ◽  
Charith Galappaththy ◽  
Peter Lazzarini ◽  
Joseph V. Moxon ◽  
...  
Keyword(s):  
Foot Ulcer ◽  
Predictive Ability ◽  
Classification Systems ◽  
The Other ◽  
Observer Agreement ◽  
Foot Ulcers ◽  
Substantial Agreement ◽  
University Of Texas ◽  
Trained Observers ◽  
Completion Times

Introduction: The inter and intra-observer reproducibility of measuring the Wound Ischemia foot Infection (WIfI) score is unknown. The aims of this study were to compare the reproducibility, completion times and ability to predict 30-day amputation of the WIfI, University of Texas Wound Classification System (UTWCS), Site, Ischemia, Neuropathy, Bacterial Infection and Depth (SINBAD) and Wagner classifications systems using photographs of diabetes-related foot ulcers. Methods: Three trained observers independently scored the diabetes-related foot ulcers of 45 participants on two separate occasions using photographs. The inter- and intra-observer reproducibility were calculated using Krippendorff’s α. The completion times were compared with Kruskal-Wallis and Dunn’s post-hoc tests. The ability of the scores to predict 30-day amputation rates were assessed using receiver operator characteristic curves and area under the curves. Results: There was excellent intra-observer agreement (α >0.900) and substantial agreement between observers (α=0.788) in WIfI scoring. There was moderate, substantial, or excellent agreement within the three observers (α>0.599 in all instances except one) and fair or moderate agreement between observers (α of UTWCS=0.306, α of SINBAD=0.516, α of Wagner=0.374) for the other three classification systems. The WIfI score took significantly longer ( P<.001) to complete compared to the other three scores (medians and inter quartile ranges of the WIfI, UTWCS, SINBAD, and Wagner being 1.00 [0.88-1.00], 0.75 [0.50-0.75], 0.50 [0.50-0.50], and 0.25 [0.25-0.50] minutes). None of the classifications were predictive of 30-day amputation ( P>.05 in all instances). Conclusion: The WIfI score can be completed with substantial agreement between trained observers but was not predictive of 30-day amputation.

FEMORAL NECK FRACTURES AND CLASSIFICATIONS RELIABILITY: ARE WE USING REPRODUCIBLE SYSTEMS?

2021 ◽  
pp. 2150015
Author(s):  
Emilio Enrietti ◽  
Marco Bechis ◽  
Giulia Nicolaci ◽  
Domenico Messina ◽  
Michele Reboli ◽  
...  
Keyword(s):  
Femoral Neck ◽  
High Reliability ◽  
Femoral Neck Fractures ◽  
Classification Systems ◽  
Observer Agreement ◽  
Type I ◽  
X Rays ◽  
Correct Treatment ◽  
Femur Fractures ◽  
Pauwels Classification

Introduction: Classification systems for femoral neck fractures are very helpful for surgeons in order to choose the correct treatment. The purpose of this study was to verify the reliability and reproducibility in the most used classifications for proximal medial femoral fracture: Garden and Pauwels classifications. Materials and methods: Five surgeons independently classified 82 intra-capsular femur fractures treated with 3 cannulated screws using Pauwels and Garden classifications measured on pre- and post-operatively X-Rays. Inter-observer agreement was calculated for both classifications using the multi-rater Fleiss’ kappa; intra-observer agreement from pre-operative to post-operative XRs for Pauwels classification was also calculated with the same method. Results: Only six cases of AVN were registered. The inter-observers agreement based on pre-operative X-rays was moderate for Pauwels classification ([Formula: see text] 0.528) and slightly lower for Garden classification ([Formula: see text] 0.448); but in the simplified Garden classification (type I and II not displaced vs type III and IV displaced) the agreement measured was almost perfect ([Formula: see text] 0.908). The intra-observer agreement for Pauwels classification was moderate ([Formula: see text] 0.456). All the results were statistically significant. Conclusions: This is the first study evaluating the Pauwels angle on both preoperative and postoperative X-rays to assess their reproducibility. Garden classification has a really high reliability and reproducibility in evaluating displaced and not displaced fractures and consequently can be helpful in choosing the correct treatment. Pauwels classification has a lower inter and intra-observer agreement.

Designing Mixed Oxides Magnetic Nanoparticles for Sensing Applications

2008 ◽  
Vol 1118 ◽  
Author(s):  
Monica Sorescu ◽  
L. Diamandescu ◽  
A. Tomescu ◽  
S. Krupa
Keyword(s):  
Mixed Oxides ◽  
Material System ◽  
X Ray Diffraction ◽  
Gas Concentration ◽  
Sensing Applications ◽  
Ideal System ◽  
Comparative Results ◽  
Xrd Patterns ◽  
Fe Ions ◽  
The Ideal

ABSTRACTZirconium-doped hematite particles of the type xZrO2-(1-x)α-Fe2O3 (x=0.1, 0.5) were synthesized using mechanochemical activation and characterized by X-ray diffraction (XRD) and Mössbauer spectroscopy. XRD patterns yielded the dependence of lattice parameters and particle size as a function of ball milling time for each value of the molar concentration x. The Mössbauer spectra were fitted with one or alternatively, four sextets, corresponding to Zr ions substituting Fe ions in the hematite structure and further required the addition of a quadrupole-split doublet, representing Fe substituting Zr in the ZrO2 lattice. We further correlated the structural properties of the zirconium-doped hematite system with the sensing properties. These were measured as function of temperature, gas concentration (carbon monoxide and methane) and variable humidity of air. The material system was found to be sensitive over the entire range of CO concentrations and the linearity of the sensor signal was not affected by the relative humidity of air, which makes it the ideal system for sensing devices. Comparative results obtained for tin-doped hematite nanoparticles are also presented.

scholarly journals Development, Relative Validity and Reproducibility of the Aus-SDS (Australian Short Dietary Screener) in Adults Aged 70 Years and above

Nutrients ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1436 ◽  
Author(s):  
Adelle M. Gadowski ◽  
Tracy A. McCaffrey ◽  
Stephane Heritier ◽  
Andrea J. Curtis ◽  
Natalie Nanayakkara ◽  
...  
Keyword(s):  
Daily Intake ◽  
Kappa Statistic ◽  
Food Groups ◽  
Cohen’S Kappa ◽  
Relative Validity ◽  
Cohen's Kappa ◽  
Spearman’S Correlation ◽  
Acceptable Agreement ◽  
Dietary Screener ◽  
Good Agreement

The aim of this study was to assess the relative validity and reproducibility of a six-item Australian Short Dietary Screener (Aus-SDS). The Aus-SDS assessed the daily intake of core food groups (vegetables, fruits, legumes and beans, cereals, protein sources and dairy sources) in 100 Australians (52 males and 48 females) aged ≥70 years. Relative validity was assessed by comparing intakes from the Aus-SDS1 with an average of three 24-h recalls (24-HRs), and reproducibility using two administrations of the Aus-SDS (Aus-SDS1 and Aus-SDS2). Cohen’s kappa statistic between the Aus-SDS1 and 24-HRs showed moderate to good agreement, ranging from 0.44 for fruits and dairy to 0.64 for protein. There was poor agreement for legume intake (0.12). Bland–Altman plots demonstrated acceptable limits of agreement between the Aus-SDS1 and 24-HRs for all food groups. Median intakes obtained from Aus-SDS1 and Aus-SDS2 did not differ. For all food groups, Cohen’s kappa statistic ranged from 0.68 to 0.89, indicating acceptable agreement between the Aus-SDS1 and Aus-SDS2. Spearman’s correlation coefficient between Aus-SDS1 and 24-HRs across all food groups ranged from 0.64 for fruit to 0.83 for protein. We found the Aus-SDS to be a useful tool in assessing daily intake of core food groups in this population.

Radiographic Assessment of Secondary Autogenous Alveolar Bone Grafting in Cleft Lip and Palate Patients

1997 ◽  
Vol 34 (3) ◽  
pp. 195-198 ◽  
Author(s):  
Jeremy D. Kindelan ◽  
Robert R. Nashed ◽  
Michael R. Bromige
Keyword(s):  
Bone Grafting ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Alveolar Bone ◽  
Kappa Statistic ◽  
Observer Agreement ◽  
Point Scale ◽  
Alveolar Bone Grafting ◽  
Grade 3 ◽  
Secondary Alveolar Bone Grafting

Objective To assess if a 4-point, radiographically based scale could be used between operators to reliably assess the success of secondary alveolar bone grafting. Design The study was retrospective with the clinicians blind to patient identity. Radiographs were examined twice by two clinicians with 1 week between assessments. Setting The research was carried out in a hospital-based orthodontic/oral and maxillofacial unit. Patients All patients who had secondary alveolar bone grafting in this unit between February 1992 and March 1995 were included In this study. There were 38 patients with a total of 48 grafted sites. Interventions The bone graft site was radiographed following orthodontic expansion prior to grafting. The radiograph was repeated postoperatively at a mean of 4 months after surgery. Main Outcome Measure The degree of bony fill in the cleft area was assessed using a 4-point scale: Grade 1 >75% bony fill; Grade 2 50–75% bony fill; Grade 3 < 50% bony fill; Grade 4 no complete bony bridge. Results Overall, 50% of grafts achieved grade 1, 23% were grade 2, 22% grade 3, and 5% grade 4. Levels of intra- and inter-observer agreement were highly variable (.33 to .72 kappa statistic). Conclusions The 4-point scale described could be used to assess the success of autogenous secondary alveolar bone grafting. It showed moderate to substantial intra-observer agreement, and fair-to-moderate inter-observer agreement.

Do thoraco-lumbar spinal injuries classification systems exhibit lower inter- and intra-observer agreement than other fractures classifications?

Injury ◽  
2016 ◽  
Vol 47 (4) ◽  
pp. 859-864 ◽  
Author(s):  
Julio Urrutia ◽  
Tomas Zamora ◽  
Ianiv Klaber ◽  
Maximiliano Carmona ◽  
Joaquin Palma ◽  
...  
Keyword(s):  
Spinal Injuries ◽  
Classification Systems ◽  
Observer Agreement ◽  
Lumbar Spinal

Subharmonic Rotor Instability Due to Elastic Asymmetry

1972 ◽  
Vol 94 (1) ◽  
pp. 185-192 ◽  
Author(s):  
E. E. Messal ◽  
R. J. Bonthron
Keyword(s):  
Natural Frequencies ◽  
Experimental Studies ◽  
Lateral Vibration ◽  
Central Mass ◽  
Vertical Rotor ◽  
Driving Speed ◽  
Ideal System ◽  
Central Disk ◽  
Minimum Natural Frequencies ◽  
The Ideal

Experimental studies were made of the instabilities of the lateral motion of a vertical rotor consisting of an asymmetric shaft having a central disk, a built-in upper bearing support, and an asymmetric set of springs for the lower bearing support. This system is statically indeterminant, and the motion of the disk is described by two coupled Hill equations. Major instabilities were observed when the rotational driving speed was near the maximum or minimum natural frequencies of lateral vibration. Very weak instabilities were observed at one-half of the above frequencies. These subharmonic instabilities are caused by inherent instabilities in the ideal system and also by bearing misalignment. Another very weak instability due to unbalance was observed at one-third of the natural frequencies. The subharmonic instabilities were observed by monitoring the motion of the central mass with two capacitance probes and displaying this motion on an oscilloscope. They were accurately predicted by first and second order perturbation-variation analyses using a method proposed by C. S. Hsu.

Computer-assisted assessment of free-text answers

2009 ◽  
Vol 24 (4) ◽  
pp. 353-374 ◽  
Author(s):  
Diana Pérez-Marín ◽  
Ismael Pascual-Nieto ◽  
Pilar Rodríguez
Keyword(s):  
Assessment Methods ◽  
Second Opinion ◽  
Computer Assisted ◽  
Free Text ◽  
Automatic Assessment ◽  
Ideal System ◽  
Computer Based ◽  
Complex Computer ◽  
State Of Art ◽  
The Ideal

AbstractThe automatic assessment of students’ free-text answers has recently received much attention, due to the necessity of exploring and taking advantage of new and more complex computer-based assessment methods. In this paper, a review of the state-of-art of the field is presented, focusing on the techniques that underpin these systems and their evaluation metrics. Although there is still a long way to go so as to reach the ideal system, the fact that the existing systems are already being used commercially and as a second opinion in exams such as GMAT proves the uptake of this field.

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