Test-Retests Reliability of Digital Photography in Measuring Quadriceps-Angle and Pelvic Tilt Angle in Healthy Population

2021 ◽  
Vol 15 (11) ◽  
pp. 3365-3367
Author(s):  
Mazhar Ali Bhutto ◽  
Azadeh Shadmehr ◽  
M. Raza Hadian ◽  
Saeed Talebian ◽  
Zeb Jehan Rana ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Tilt Angle ◽  
Pelvic Tilt ◽  
Digital Photography ◽  
Angle Measurement ◽  
The Body ◽  
Healthy Population ◽  
Intra Class Correlation ◽  
Q Angle ◽  
Intra Class Correlation Coefficient

Aim: Capturing body images through digital photography method for calculation of quadriceps angles and pelvic position in clinical assessment is an inexpensive method. The aim of this study is to evaluate the reliability of measuring Q-angle and pelvic tilt angle with digital camera and Microdicom software. Place and duration: University of Lahore and Tehran University of medical sciences, from June 2020 to June 2021 Methods: Bilateral lower limbs of fifteen healthy asymptomatic subjects were considered for calculations of desired angles. A 13-megapixel camera was used to capture images of quadriceps angle (q-angle) measurement in an anterior view and for pelvic angle measurement image in lateral view along with specific landmark markers on the body were captured. Images were transferred to Microdicom software for calculating desire angles. Three trails of procedures and Intra-class Correlation Coefficient (ICC) with 95% Confidence Interval (CI), Munro’s classification for reliability coefficients were used for the description of degrees. Standard error of measurement (SEM) was also calculated. Results: The Intra-class correlation coefficient values for right side Q- angle was 0.949(0.878-.981) and for left side it was 0.924(0.819-0.972) and <0.005 significant p-value. The ICC results for measuring pelvic title angle in the right side .990 (.975-.996) and left legs were .991 (.974-.997). Showing that the results were highly reliable and significant (p<0.005). Conclusions: The q-angle and pelvic angle measured with digital image have excellent consistency and reliability. Keywords: angle, asymptomatic, Images, pelvic, quadriceps

scholarly journals Influence of Overweight and Obesity on Pelvic Tilt, Q-Angle and Foot Posture in Both Genders

2021 ◽  
Vol 15 (7) ◽  
pp. 1813-1817
Author(s):  
Mazhar Ali Bhutto ◽  
Azadeh Shadmaher ◽  
M. Raza Hadian ◽  
Saeed Talebian ◽  
Syed Arslan Asad
Keyword(s):  
Pelvic Tilt ◽  
Angle Measurement ◽  
Overweight And Obesity ◽  
Postural Instability ◽  
The Body ◽  
P Value ◽  
Kinetic Chain ◽  
Validity And Reliability ◽  
Q Angle ◽  
Foot Posture

Background: Normal movement pattern and its relationship with various segments of the body create a kinetic chain for performing certain activities. The abnormal patterns of movement may precipitate risk of injuries at any segmentleg from the pelvis to the foot [1-3]. Obesity has been marked as risk factor for postural instability. The mechanism of altering body geometry due to excessive deposition of body fat at certain areas like abdomen and hips increases the stress on the musculoskeletal system leading to postural-instability. Aim: In study the effects of obesity on different segments of lower limb are being focused. Place & Duration: Data was collected in Pakistan. Study duration April 2020 to April 2021 Methods: After ethical approval, Consent and explanation of procedure the population was subdivided into three groups on the bases of BMI, with 50 samples in each group. For Pelvic tilt and Q-angle measurement the image captured with 13-megapixel camera and angle was measured[4]in computer with the help of Microdicom software. To evaluate foot posture, the foot posture index tool was used. The ICC95% calculated for validity and reliability of photography. Results: Validity and reliability test ICC 95% confidence interval for pelvic tilt and Q-angle measurement with photography method was 0.991 (0.974-.997) and 0.949(0.878-.981), with P-value 0.0001. There is significant different in pelvic tilt, Q-angle and foot posture of subjects with normal, overweight and obesity. Conclusion: Obesity has significant effect on Q-angle and pelvic tilt and foot posture. Key words: Q-angle, Posture, Pelvic, Obesity, Influence.

Development and Validation of an Instrument to Assess Horseback Mobility in Hippotherapy

2021 ◽  
pp. 003151252110365
Author(s):  
Alessandra V. Prieto ◽  
Kênnea Martins Almeida Ayupe ◽  
Ana C. A. Abreu ◽  
Paulo J. B. Gutierres Filho
Keyword(s):  
Correlation Coefficient ◽  
Factor Structure ◽  
Internal Consistency ◽  
Rater Reliability ◽  
Intra Class Correlation ◽  
Exploratory Factor Analyses ◽  
Excellent Internal Consistency ◽  
Development And Validation ◽  
Functional Gain ◽  
Intra Class Correlation Coefficient

Improvement in rider mobility represents an important functional gain for people with disabilities undergoing hippotherapy. However, there is no validated measuring instrument to track and document the rider's progress in riding activities. In this study, we aimed to develop and establish validity evidence for an instrument to assess hippotherapy participants’ mobility on horseback. We report on this development through the stages of: (a) content validation, (b) construct validation, (c) inter- and intra-rater reliability and (d) internal consistency analysis. We evaluated its factor structure with exploratory factor analyses, calculated values for inter- and intra-rater reliability using the intra-class correlation coefficient, and calculated its internal consistency using Cronbach's alpha. We followed recommendations by the Guidelines for Reporting Reliability and Agreement Studies. We found good inter-rater reliability (intra-class correlation coefficient – ICC = 0.991–0.999) and good intra-rater reliability (ICC = 0.997–1.0), and there was excellent internal consistency (Cronbach's α = 0.937–0.999). The instrument’s factor structure grouped its three domains into one factor. As this instrument is theoretically consistent and has been found to be appropriate and reliable for its intended use, it is now available for the measurement of horseback mobility among hippotherapy riders.

KATZ AND STIRRAT HAND DIAGRAM REVISITED

Hand Surgery ◽  
2010 ◽  
Vol 15 (02) ◽  
pp. 71-73 ◽  
Author(s):  
Rouin Amirfeyz ◽  
Sanchit Mehendale ◽  
Sarah Tyrrell ◽  
Raj Bhatia ◽  
Ian Leslie ◽  
...  
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Correlation Coefficient ◽  
Carpal Tunnel ◽  
Observer Agreement ◽  
Healthy Individuals ◽  
Intra Class Correlation ◽  
Hand Surgeon ◽  
Observer Reliability ◽  
Tunnel Syndrome ◽  
Intra Class Correlation Coefficient

Katz and Stirrat devised a hand diagram, which uses subjective information from the patient for the diagnosis of carpal tunnel syndrome (CTS). They reported a good result. We tested the inter-observer and intra-observer reliability of this hand diagram. Twenty five consecutive patients with a diagnosis of CTS, 25 with other common hand and wrist problems but CTS and 25 healthy individuals were prospectively recruited. Each patient filled in a hand diagram. Two experienced hand surgeon scored the diagrams blindly on two different sittings four-week apart. The intra-class correlation coefficient (ICC) and Cohen's Kappa were used for intra and inter-observer reliability respectively. The intra-observer agreement was poor (ICC 95% 0.33–0.65) and inter-observer was fair (Kappa = 0.241). This study does not support the use of Katz and Stirrat Hand Diagram for the diagnosis of carpal tunnel syndrome in place if a thorough clinical examination.

scholarly journals Reliability, Stability and Validity of the Brazilian Adaptation of the Oliveira Questionnaire on Low Back Pain in Young People

2017 ◽  
Vol 30 (10) ◽  
pp. 691 ◽  
Author(s):  
Debora Soccal Schwertner ◽  
Raul Oliveira ◽  
Ana Paula Ramos Marinho ◽  
Magnus Benetti ◽  
Thais Silva Beltrame ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Young People ◽  
Correlation Coefficient ◽  
Internal Consistency ◽  
Low Back ◽  
Intra Class Correlation ◽  
Brazilian Version ◽  
Spearman’S Correlation ◽  
Intra Class Correlation Coefficient

Introduction: The objective of this study was to adapt the Brazilian version, and verify the validity, reliability and internal consistency of the Oliveira questionnaire on low back pain in young people.Material and Methods: The questionnaire was translated from European Portuguese into Brazilian Portuguese by means of translation and re-translation. The validity of the contents was determined by experts who analyzed the clarity and pertinence of the questions. Fifteen young people aged 15 to 18 took part in the pre-test step (qualitative analysis), 40 in the test-retest (reliability) and 679 in the evaluation of internal consistency. The intra-class correlation coefficient and Spearman’s correlation coefficient were used in the reliability analysis (test-retest), and Cronbach’s alpha to determine the internal consistency (stability).Results: In the translation phase the questionnaire was modified and considered suitable, observing similarity and equivalence of the two versions. After being corrected by the experts in the validation of the contents, the instrument was considered suitable and valid, and in the pre-test, the young people suggested some modifications to make the questionnaire more succinct. With respect to reliability, the values for the intra-class correlation coefficient were between 0.512 – acceptable and 1 – excellent and Spearman’s correlation coefficient varied between 0.525 and 1, classifying the instrument as reproducible. The internal consistency was considered acceptable with a 0.757 Cronbach’s alpha.Discussion: The Oliveira questionnaire was choosen since it has been used in several Portuguese studies; moreover, it addresses the need to raise data regarding low back pain and associated risk factors.Conclusions: The Brazilian version of the Oliveira questionnaire on low back pain in young people showed valid and reliable cultural adaptation, with good reliability and stability.

scholarly journals 3D Simulation of Radiographic Projections to Test and Reduce the Effect of Pelvic Tilt on the Accuracy of Cross-table Lateral Radiography

2020 ◽  
Author(s):  
Jie Xu ◽  
Baohua Su ◽  
Wenhui Zhang ◽  
Hao Sun ◽  
Deng Li ◽  
...  
Keyword(s):  
Measurement Errors ◽  
Reliable Method ◽  
Pelvic Tilt ◽  
Intra Class Correlation ◽  
High Agreement ◽  
Mathematical Algorithm ◽  
Radiographic Measurements ◽  
Pelvic Position ◽  
Intra Class Correlation Coefficient ◽  
Version Measurement

Abstract Background:Cross-table lateral (CL) radiography is aconvenientandfeasible method toassess cup version angle (VA) after total hip arthroplasty; however, the pelvic tilt (PT) may contribute to its measurement inaccuracy.We sought (1) to determinethe effect of the PT on cup version measurement on CL radiography and (2) to develop a method for reducing measurement errors caused by the PT.Methods: Two groups of VAswere measured respectively on 3D simulatedCL images and CL radiographs. Based on the data, we created a corrective formula to convert the radiographic measurements into values approximating the actual VA under a natural pelvic position. The corrected valueswere compared with computed tomography (CT) measurements to verified the corrective formula. Results:There was a high correlation between the measurements and PTs. For each 1-degree increased in the PT, the VA decreased by 0.76° (R²=0.995, p<0.001). The VA measurements corrected by our equation was in high agreement with the CT-measured valueswithreferenceto the corresponding PT (intra-class correlation coefficient [ICC]=0.988, p<0.001), which was in sharp contrast to that without PT control (ICC=0.454, p=0.203).Conclusions: ThePT may contribute to cup version measurement inaccuracies on CL radiography. Our mathematical algorithm can serve as a reliable method to improve the accuracy of CL radiography.

Multilevel Modeling Methods for E-Collaboration Data

2011 ◽  
pp. 450-456 ◽  
Author(s):  
Sema A. Kalaian
Keyword(s):  
Parameter Estimation ◽  
Hypothesis Testing ◽  
Multilevel Modeling ◽  
Present Article ◽  
Correlation Coefficient ◽  
Multilevel Data ◽  
Intra Class Correlation ◽  
Modeling Methods ◽  
Software Packages ◽  
Intra Class Correlation Coefficient

The present article aims to (1) conceptualize and present the two-level multilevel model for e-collaboration research, (2) conceptualize the Intra-Class Correlation Coefficient (ICC), (3) conceptualize R2 in e-collaboration multilevel modeling, (4) present centering methods that can be used in e-collaboration multilevel modeling, (5) present parameter estimation and hypothesis testing methods for e-collaboration multilevel modeling, and (6) list some of the existing commercial software packages that can be used for analyzing the e-collaboration multilevel data.

scholarly journals 1633 Final non-invasive echo-guided assessment of left atrial pressure after percutaneous edge-to-edge procedure for mitral regurgitation

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
M Gavazzoni ◽  
M Z Zuber ◽  
A P Pozzoli ◽  
M T Taramasso ◽  
F M Maisano
Keyword(s):  
Correlation Coefficient ◽  
Left Atrial ◽  
Continuous Wave ◽  
Venous Pressure ◽  
Right Atrial ◽  
Rater Reliability ◽  
Intra Class Correlation ◽  
Therapeutic Decisions ◽  
Intra Class Correlation Coefficient

Abstract Background/Introduction. Recently the central role of hemodynamic invasive monitoring during MitraClip (Abbott Vascular, Santa Clara, CA, USA) procedure has been raised. After removal of Steerable Guide Catheter (SGC) at the end of procedure, iatrogenic interatrial septum defect determines acute sub-clinical hemodynamic changes depending on right atrial (RA) and left atrial (LA) pressures. The possibility to assess LAP non-invasively by Doppler -echocardiography at the end of the procedure allows to quantify real hemodynamic impact of reduction of MR and leaves the door open to further therapeutic decisions (such as closure of iatrogenic IASd). Purpose This prospective study aimed to assess the role of evaluation of post-procedural mean trans-atrial gradient with continuous-wave (CW) Doppler (DPmean-IAS) in estimating final m-LAP after removal of SGC. Methods We prospectively performed the computation of trans-atrial CW- Doppler tracing for estimation of mean-transatrial gradient (meanGp-LA-RA) in patients treated with MitraClip; we added the estimation of central venous pressure (CVP) according to: i) dilatation of superior vena cava (IVC, mm); ii) presence or not of systolic excursion of IVC (end-inspiratory excursion was not evaluable in patients under sedation); iii) hepatic vein dilatation. The sum of CVP estimated and meanGp-LA-RA (mmHg) represents the m-LAP-Echo-measured at the end of procedure. This value has been compared with m-LAP measured invasively before removal of SGC. We tested the inter-rater reliability with the Intra-class Correlation Coefficient for comparing this method with the gold standard (invasive assessment of LAP). Results we included 19 patients; aetiology of MR was degenerative in 89% of cases. Basal m-LAP was 15 ± 13,3 mmHg and decreased by 32% by the end of procedure (mean-LAP at the end: 10,1 ± 3,3 mmHg, p &lt; 0.001). At the end of the procedure mean Gp-LA-RA was 2.5 ± 1.2 mmHg and CVP 7.5 ± 3.5; the m-LAP-Echo-measured was 9.6 ± 2.4. The delay in time of computation of m-LAP by echocardiography with respect to last invasive assessment available was computed and settled around 5 minutes (IQR 3-9 min). The inter-rater reliability with the Intra-class Correlation Coefficient was high: 0.8, (CI95% 0.647-0.948, p &lt; 0.01); with Bland-Altman test we could assess that bias of measures was acceptable for this clinical context with upper concordance limit of 2,7 mmHg and lower of 4,7 mmHg, with a bias of 0,9 mmHg, not relevant for this clinical purpose. Conclusions The present study represents the first validation of a Doppler-based method for non invasively assessing post-procedural LAP in percutaneous mitral valve interventions requiring transeptal approach. Follow up is needed for correlate this value with clinical outcomes.

scholarly journals P326 Changes in left atrial dimensions during stress echocardiography: linear vs planimetric methods

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
M A R Torres ◽  
T F Texeira ◽  
A C Camarozano ◽  
C Bertoluci ◽  
A I Heidemann Jr ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Stress Echocardiography ◽  
Peak Stress ◽  
Suspected Coronary Artery Disease ◽  
Intra Class Correlation ◽  
First Choice ◽  
Stress Echo ◽  
Artery Disease ◽  
Stress Variations ◽  
Intra Class Correlation Coefficient

Abstract OnBehalf On behalf of the Stress Echo 2020 study group of the Italian Society of Echocardiography and Cardiovascular Imaging (SIECVI) Background The measurement of left atrium (LA) can be obtained with simple linear or more complex biplane disk summation Simpson (S) method at rest and during stress echocardiography (SE). Although planimetric methods are mandatory to accurately assess resting LA volume, we sought to study if linear (L) methods can be equally valuable in assessing dynamic changes during SE. Purpose To assess accuracy of LA- SE with S compared to L method. Methods SE was performed in 34 patients (age 59 ± 16 years, 18 females) with known or suspected coronary artery disease. All had acceptable acoustic window at rest and were referred for clinically-driven SE (dobutamine in 21, dipyridamole in 13). LA was measured at rest and peak stress with both methods: 1- S biplane method from 4- and 2-chamber views; 2- L method with measurement of anteroposterior diameter from 2-D targeted M-mode in parasternal long-axis view. Two independent observers measured a set of 20 clips and repeated the measurements after 1 month on the same images. Stress-rest differences of L and S were compared with Spearman non-parametric correlation. Results LA measurement was obtained in all patients with L, 34/42 with S (feasibility 100%, and 80%, respectively). The off-line analysis time at each step (rest and stress) measured by stop-clock was 22.3 sec for L and 93 sec for S method (p &lt; 0.001). The intra-rater intra-class correlation coefficient for L was 0.965 for single measures and 0.982 for average measures. For S, it was 0.830 in single measures and 0.907 for average measures. The inter-rater correlation coefficient for L was 0.920 for single measures and 0.958 for average measures. For S, it was 0.901 for single measures and 0.948 for average measures. Absolute LA dimensions were moderately correlated between S and L at rest (r = 0.61, p &lt; 0.01), and during stress (r = 0.476, p &lt; 0.01). Rest-stress variations were not correlated (r = 0.004, p = NS). Conclusion LA measurement is highly feasible during SE with L and S methods. Absolute values with both are only moderately correlated at rest, less at peak stress, and not correlated when only rest-to-stress variations are considered. Although L is more feasible, less time-consuming, and more reproducible, S should be the first choice for more accurate assessment of rest-stress LA dimensions in pharmacologic SE. Abstract P326 Figure. Correlation of LA rest-stress

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