scholarly journals Agreement Between Dual-Energy X-Ray Absorptiometry and Quantitative Ultrasound to Evaluate Bone Health in Adolescents: The PRO-BONE Study

2018 ◽  
Vol 30 (4) ◽  
pp. 466-473 ◽  
Author(s):  
Ana Torres-Costoso ◽  
Dimitris Vlachopoulos ◽  
Esther Ubago-Guisado ◽  
Asunción Ferri-Morales ◽  
Iván Cavero-Redondo ◽  
...  
Keyword(s):  
Quantitative Ultrasound ◽  
Bone Health ◽  
Intraclass Correlation ◽  
Broadband Ultrasound Attenuation ◽  
Correlation Coefficients ◽  
Dual Energy ◽  
Stiffness Index ◽  
X Ray ◽  
Intraclass Correlation Coefficients ◽  
Bivariate Correlation

Purpose: The present study aims to investigate the association between dual-energy X-ray absorptiometry (DXA) and quantitative ultrasound (QUS) parameters and the intermethods agreement in active males. Methods: In this cross-sectional study, bone health (by DXA and calcaneal QUS), physical activity (by accelerometers), and anthropometrics measurements were assessed in 117 active adolescents (12–14 y old). Bivariate correlation coefficients were calculated to assess the relationships between DXA standard regions of interest and QUS parameters. Intraclass correlation coefficients and Bland–Altman plots were used to assess the level of agreement between bone mineral content regions derived from DXA and stiffness index. The measurements were z score transformed for comparison. Results: Most QUS parameters were positive and significantly correlated with DXA outcomes (stiffness index: r = .43–.52; broadband ultrasound attenuation: r = .50–.58; speed of sound: r = .25–.27) with the hip showing the highest correlations. Moreover, the present study found fair to good intraclass correlation coefficients of agreement (.60–.68) between DXA and QUS to assess bone health. The Bland–Altman analysis showed a limited percentage of outliers (3.2%–8.6%). Conclusion: QUS device could represent an acceptable alternative method to assess bone health in active adolescent males.

scholarly journals The reliability of the augmented Lehnert-Schroth and Rigo classification in scoliosis management

2021 ◽  
Vol 77 (2) ◽  
Author(s):  
Burçin Akçay ◽  
Tuğba Kuru Çolak ◽  
Adnan Apti ◽  
İlker Çolak ◽  
Önder Kızıltaş
Keyword(s):  
Treatment Plan ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Error Measurement ◽  
X Rays ◽  
X Ray ◽  
Intraclass Correlation Coefficients ◽  
Observer Reliability ◽  
The Individual ◽  
Curve Patterns

Background: In pattern-specific scoliosis exercises and bracing, the corrective treatment plan differs according to different curve patterns. There are a limited number of studies investigating the reliability of the commonly used classifications systems.Objective: To test the reliability of the augmented Lehnert-Schroth (ALS) classification and the Rigo classification.Methods: X-rays and posterior photographs of 45 patients with scoliosis were sent by the first author to three clinicians twice at 1-week intervals. The clinicians classified images according to the ALS and Rigo classifications, and the data were analysed using SPSS V-16. Intraclass correlation coefficients (ICCs) and standard error measurement (SEM) were calculated to evaluate the inter- and intra-observer reliability.Results: The inter-observer ICC values were 0.552 (ALS), 0.452 (Rigo) for X-ray images and 0.494 (ALS), 0.518 (Rigo) for the photographs. The average intra-observer ICC value was 0.720 (ALS), 0.581 (Rigo) for the X-ray images and 0.726 (ALS) and 0.467 (Rigo) for the photographs.Conclusions: The results of our study indicate moderate inter-observer reliability for X-ray images using the ALS classification and clinical photographs using the Rigo classification. Intra-observer reliability was moderate to good for X-ray images and clinical photographs using the ALS classification and poor to moderate for X-ray and clinical photographs using the Rigo classification.Clinical implications: Pattern classifications assist in creating a plan and indication of correction in specific scoliosis physiotherapy and pattern-specific brace applications and surgical treatment. More sub-types are needed to address the individual patterns of curvature. The optimisation of curve classification will likely reduce failures in diagnosis and treatment.

scholarly journals Assessment of the effect of strontium, lead and aluminum on dual-energy x-ray absorptiometry and quantitative ultrasound using trabecular bone-mimicking phantoms

2021 ◽  
Author(s):  
Deok Hyun (Danny) Jang
Keyword(s):  
Trabecular Bone ◽  
Bone Mineral ◽  
Bone Densitometry ◽  
Quantitative Ultrasound ◽  
Dual Energy ◽  
Areal Bone Mineral Density ◽  
Stiffness Index ◽  
Mineral Density ◽  
Acoustic Parameters ◽  
X Ray

Dual-energy X-ray absorptiometry (DXA) is the gold standard of bone densitometry. However, inaccurate estimation of areal bone mineral density (aBMD) is of concern when calcium in bone mineral is partially substituted with bone-seeking elements such as strontium, lead and aluminum. Quantitative ultrasound (QUS) is an alternative bone densitometry technique that can assess bone health based on the measurement of acoustic parameters. This study aims to investigate the effect of the clinically relevant concentrations of bone-seeking elements on aBMD measured by DXA and the acoustic parameters measured by QUS, using trabecular bone-mimicking phantoms. Statistically significant linear relationship was observed between aBMD and strontium concentration. For clinically relevant concentrations of lead and aluminum, the deviation in aBMD measurements was within 1% coefficient of variation of DXA. No statistically significant deviation was observed in stiffness index measurement by QUS in the presence of any of the three bone-seeking elements

scholarly journals Assessment of the effect of strontium, lead and aluminum on dual-energy x-ray absorptiometry and quantitative ultrasound using trabecular bone-mimicking phantoms

2021 ◽  
Author(s):  
Deok Hyun (Danny) Jang
Keyword(s):  
Trabecular Bone ◽  
Bone Mineral ◽  
Bone Densitometry ◽  
Quantitative Ultrasound ◽  
Dual Energy ◽  
Areal Bone Mineral Density ◽  
Stiffness Index ◽  
Mineral Density ◽  
Acoustic Parameters ◽  
X Ray

Dual-energy X-ray absorptiometry (DXA) is the gold standard of bone densitometry. However, inaccurate estimation of areal bone mineral density (aBMD) is of concern when calcium in bone mineral is partially substituted with bone-seeking elements such as strontium, lead and aluminum. Quantitative ultrasound (QUS) is an alternative bone densitometry technique that can assess bone health based on the measurement of acoustic parameters. This study aims to investigate the effect of the clinically relevant concentrations of bone-seeking elements on aBMD measured by DXA and the acoustic parameters measured by QUS, using trabecular bone-mimicking phantoms. Statistically significant linear relationship was observed between aBMD and strontium concentration. For clinically relevant concentrations of lead and aluminum, the deviation in aBMD measurements was within 1% coefficient of variation of DXA. No statistically significant deviation was observed in stiffness index measurement by QUS in the presence of any of the three bone-seeking elements

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.

scholarly journals Is there a relationship between the overhead press and split jerk maximum performance? Influence of sex

2021 ◽  
pp. 174795412110204
Author(s):  
Marcos A Soriano ◽  
G Gregory Haff ◽  
Paul Comfort ◽  
Francisco J Amaro-Gahete ◽  
Antonio Torres-González ◽  
...  
Keyword(s):  
Confidence Intervals ◽  
Body Mass ◽  
Upper Limb ◽  
High Reliability ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Training Experience ◽  
Maximum Performance ◽  
Repetition Maximum ◽  
Intraclass Correlation Coefficients

The aims of this study were to (I) determine the differences and relationship between the overhead press and split jerk performance in athletes involved in weightlifting training, and (II) explore the magnitude of these differences in one-repetition maximum (1RM) performances between sexes. Sixty-one men (age: 30.4 ± 6.7 years; height: 1.8 ± 0.5 m; body mass 82.5 ± 8.5 kg; weightlifting training experience: 3.7 ± 3.5 yrs) and 21 women (age: 29.5 ± 5.2 yrs; height: 1.7 ± 0.5 m; body mass: 62.6 ± 5.7 kg; weightlifting training experience: 3.0 ± 1.5 yrs) participated. The 1RM performance of the overhead press and split jerk were assessed for all participants, with the overhead press assessed on two occasions to determine between-session reliability. The intraclass correlation coefficients (ICC) and 95% confidence intervals showed a high reliability for the overhead press ICC = 0.98 (0.97 – 0.99). A very strong correlation and significant differences were found between the overhead press and split jerk 1RM performances for all participants (r = 0.90 [0.93 – 0.85], 60.2 ± 18.3 kg, 95.7 ± 29.3 kg, p ≤ 0.001). Men demonstrated stronger correlations between the overhead press and split jerk 1RM performances (r = 0.83 [0.73-0.90], p ≤ 0.001) compared with women (r = 0.56 [0.17-0.80], p = 0.008). These results provide evidence that 1RM performance of the overhead press and split jerk performance are highly related, highlighting the importance of upper-limb strength in the split jerk maximum performance.

scholarly journals Patient-Reported Dysphagia in Adults with Eosinophilic Esophagitis: Translation and Validation of the Swedish Eosinophilic Esophagitis Activity Index

Dysphagia ◽  
2021 ◽  
Author(s):  
Sofie Albinsson ◽  
Lisa Tuomi ◽  
Christine Wennerås ◽  
Helen Larsson
Keyword(s):  
Eosinophilic Esophagitis ◽  
Activity Index ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Control Group ◽  
Cronbach’S Alpha ◽  
Intraclass Correlation Coefficients ◽  
Cronbach's Alpha ◽  
Patient Reported ◽  
Eortc Qlq

AbstractThe lack of a Swedish patient-reported outcome instrument for eosinophilic esophagitis (EoE) has limited the assessment of the disease. The aims of the study were to translate and validate the Eosinophilic Esophagitis Activity Index (EEsAI) to Swedish and to assess the symptom severity of patients with EoE compared to a nondysphagia control group. The EEsAI was translated and adapted to a Swedish cultural context (S-EEsAI) based on international guidelines. The S-EEsAI was validated using adult Swedish patients with EoE (n = 97) and an age- and sex-matched nondysphagia control group (n = 97). All participants completed the S-EEsAI, the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire-Oesophageal Module 18 (EORTC QLQ-OES18), and supplementary questions regarding feasibility and demographics. Reliability and validity of the S-EEsAI were evaluated by Cronbach’s alpha and Spearman correlation coefficients between the domains of the S-EEsAI and the EORTC QLQ-OES18. A test–retest analysis of 29 patients was evaluated through intraclass correlation coefficients. The S-EEsAI had sufficient reliability with Cronbach’s alpha values of 0.83 and 0.85 for the “visual dysphagia question” and the “avoidance, modification and slow eating score” domains, respectively. The test–retest reliability was sufficient, with good to excellent intraclass correlation coefficients (0.60–0.89). The S-EEsAI domains showed moderate correlation to 6/10 EORTC QLQ-OES18 domains, indicating adequate validity. The patient S-EEsAI results differed significantly from those of the nondysphagia controls (p < 0.001). The S-EEsAI appears to be a valid and reliable instrument for monitoring adult patients with EoE in Sweden.

scholarly journals Diagnosis of left ventricular hypertrophy using non-ECG-gated 15O-water PET

2021 ◽  
Author(s):  
Jens Sörensen ◽  
Jonny Nordström ◽  
Tomasz Baron ◽  
Stellan Mörner ◽  
Sven-Olof Granstam ◽  
...  
Keyword(s):  
Method Development ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Roc Curves ◽  
Left Ventricular ◽  
Intraclass Correlation Coefficients ◽  
Concentric Hypertrophy ◽  
2D Echocardiography ◽  
Positron Emission ◽  
Septal Wall Thickness

Abstract Aim To develop a method for diagnosing left ventricular (LV) hypertrophy from cardiac perfusion 15O-water positron emission tomography (PET). Methods We retrospectively pooled data from 139 subjects in four research cohorts. LV remodeling patterns ranged from normal to severe eccentric and concentric hypertrophy. 15O-water PET scans (n = 197) were performed with three different PET devices. A low-end scanner (66 scans) was used for method development, and remaining scans with newer devices for a blinded evaluation. Dynamic data were converted into parametric images of perfusable tissue fraction for semi-automatic delineation of the LV wall and calculation of LV mass (LVM) and septal wall thickness (WT). LVM and WT from PET were compared to cardiac magnetic resonance (CMR, n = 47) and WT to 2D-echocardiography (2DE, n = 36). PET accuracy was tested using linear regression, Bland–Altman plots, and ROC curves. Observer reproducibility were evaluated using intraclass correlation coefficients. Results High correlations were found in the blinded analyses (r ≥ 0.87, P < 0.0001 for all). AUC for detecting increased LVM and WT (> 12 mm and > 15 mm) was ≥ 0.95 (P < 0.0001 for all). Reproducibility was excellent (ICC ≥ 0.93, P < 0.0001). Conclusion 15O-water PET might detect LV hypertrophy with high accuracy and precision.

Intersession reliability of GPS-based and accelerometer-based physical variables in small-sided games with and without the offside rule

2021 ◽  
pp. 175433712098764
Author(s):  
Igor Junio de Oliveira Custódio ◽  
Gibson Moreira Praça ◽  
Leandro Vinhas de Paula ◽  
Sarah da Glória Teles Bredt ◽  
Fabio Yuzo Nakamura ◽  
...  
Keyword(s):  
Root Mean Square ◽  
Global Positioning System ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Mean Square ◽  
Physical Demands ◽  
Intraclass Correlation Coefficients ◽  
Total Distance ◽  
Global Positioning ◽  
High Level

This study aimed to analyze the intersession reliability of global positioning system (GPS-based) distances and accelerometer-based (acceleration) variables in small-sided soccer games (SSG) with and without the offside rule, as well as compare variables between the tasks. Twenty-four high-level U-17 soccer athletes played 3 versus 3 (plus goalkeepers) SSG in two formats (with and without the offside rule). SSG were performed on eight consecutive weeks (4 weeks for each group), twice a week. The physical demands were recorded using a GPS with an embedded triaxial accelerometer. GPS-based variables (total distance, average speed, and distances covered at different speeds) and accelerometer-based variables (Player Load™, root mean square of the acceleration recorded in each movement axis, and the root mean square of resultant acceleration) were calculated. Results showed that the inclusion of the offside rule reduced the total distance covered (large effect) and the distances covered at moderate speed zones (7–12.9 km/h – moderate effect; 13–17.9 km/h – large effect). In both SSG formats, GPS-based variables presented good to excellent reliability (intraclass correlation coefficients – ICC > 0.62) and accelerometer-based variables presented excellent reliability (ICC values > 0.89). Based on the results of this study, the offside rule decreases the physical demand of 3 versus 3 SSG and the physical demands required in these SSG present high intersession reliability.

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