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Liu F, Schrack J, Wanigatunga SK, Rabinowitz JA, He L, Wanigatunga AA, Zipunnikov V, Simonsick EM, Ferrucci L, Spira AP. Comparison of sleep parameters from wrist-worn ActiGraph and Actiwatch devices. Sleep 2024; 47:zsad155. [PMID: 37257489 PMCID: PMC10851854 DOI: 10.1093/sleep/zsad155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 05/03/2023] [Indexed: 06/02/2023] Open
Abstract
Sleep and physical activity, two important health behaviors, are often studied independently using different accelerometer types and body locations. Understanding whether accelerometers designed for monitoring each behavior can provide similar sleep parameter estimates may help determine whether one device can be used to measure both behaviors. Three hundred and thirty one adults (70.7 ± 13.7 years) from the Baltimore Longitudinal Study of Aging wore the ActiGraph GT9X Link and the Actiwatch 2 simultaneously on the non-dominant wrist for 7.0 ± 1.6 nights. Total sleep time (TST), wake after sleep onset (WASO), sleep efficiency, number of wake bouts, mean wake bout length, and sleep fragmentation index (SFI) were extracted from ActiGraph using the Cole-Kripke algorithm and from Actiwatch using the software default algorithm. These parameters were compared using paired t-tests, Bland-Altman plots, and Deming regression models. Stratified analyses were performed by age, sex, and body mass index (BMI). Compared to the Actiwatch, the ActiGraph estimated comparable TST and sleep efficiency, but fewer wake bouts, longer WASO, longer wake bout length, and higher SFI (all p < .001). Both devices estimated similar 1-min and 1% differences between participants for TST and SFI (β = 0.99, 95% CI: 0.95, 1.03, and 0.91, 1.13, respectively), but not for other parameters. These differences varied by age, sex, and/or BMI. The ActiGraph and the Actiwatch provide comparable absolute and relative estimates of TST, but not other parameters. The discrepancies could result from device differences in movement collection and/or sleep scoring algorithms. Further comparison and calibration is required before these devices can be used interchangeably.
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Affiliation(s)
- Fangyu Liu
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Jennifer Schrack
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
- Center on Aging and Health, Johns Hopkins University, Baltimore, Maryland, USA
| | - Sarah K Wanigatunga
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Jill A Rabinowitz
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Linchen He
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
- Department of Community and Population Health, College of Health, Lehigh University, Bethlehem, Pennsylvania, USA
| | - Amal A Wanigatunga
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
- Center on Aging and Health, Johns Hopkins University, Baltimore, Maryland, USA
| | - Vadim Zipunnikov
- Center on Aging and Health, Johns Hopkins University, Baltimore, Maryland, USA
- Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | | | - Luigi Ferrucci
- National Institute on Aging, National Institutes of Health, Baltimore, USA
| | - Adam P Spira
- Center on Aging and Health, Johns Hopkins University, Baltimore, Maryland, USA
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
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Respiratory triggered diffusion-weighted imaging with a single diffusion sensitising gradient to reduce image acquisition time - A feasibility study in the workup of hepatocellular carcinoma. Eur J Radiol 2021; 141:109807. [PMID: 34146912 DOI: 10.1016/j.ejrad.2021.109807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 04/15/2021] [Accepted: 05/31/2021] [Indexed: 11/23/2022]
Abstract
PURPOSE We evaluated respiratory triggered unidirectional single-shot echo-planar imaging (u-SSEPI) as a time-saving measure in diffusion imaging of the upper abdomen. Specifically, we compared the ADC values obtained from unidirectional DWI (u-SSEPI) and routine DWI (4t-SSEPI) and also the diagnostic accuracies of unidirectional and routine DWI sequences in the identification of focal liver lesions in the setting of chronic liver disease (CLD). MATERIALS AND METHODS This prospective, IRB approved study, included 48 patients of CLD who underwent-DCE-MRI on a 1.5 T scanner for hepatocellular carcinoma (HCC) workup. In addition to 4t-SSEPI, u-SSEPI was acquired with the diffusion sensitising gradient being applied in only one direction; keeping all other parameters same as 4t-SSEPI. Two blinded radiologists evaluated the DWI studies for image quality and detection of liver lesions. A composite gold standard was established using DCE-MRI, follow-up imaging and patient clinical details. The apparent diffusion coefficients (ADCs) of the liver, spleen and the lesions were compared between the two sequences. ROC analysis evaluated the diagnostic accuracy of ADC from both the sequences in identifying HCC. RESULTS Eighty-eight lesions were identified using the composite gold standard. u-SSEPI resulted in 3 times faster image acquisition. No statistically significant differences were demonstrated between the unidirectional and routine DWI sequences for image quality parameters and lesion detection rates. Lesion wise comparison of the ADC values from both the sequences was not statistically different (p = 0.8) with a coefficient of variation = 12-14 %. The Bland- Altman plots and the Passing-Bablock regression analysis demonstrated a systematic and proportional bias between the ADC values obtained. The AUC of the ROC curve, however, was 0.63-observer1; 0.62-oobserver2 for routine DWI and 0.65; 0.62 for unidirectional DWI when ADC was used to identify HCC (the AUCs were not statistically different (p = 0.6-0.8)). CONCLUSION No significant differences were demonstrated in the diagnostic accuracies of unidirectional and routine DWI in the diagnosis of HCC. Unidirectional diffusion may be further evaluated in other organs where diffusion is isotropic, especially in respiratory triggered sequences where the imaging time dividend is significant.
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Yang JJ, Seo SW, Kim JS, Chung Y, Kim H, Ko DH, Hwang SH, Heung-Bum O. A comparison of the automated blood bank system IH-500 and manual tube method for anti-blood group antibody titration: a quantitative approach. Transfus Apher Sci 2020; 59:102806. [PMID: 32446633 DOI: 10.1016/j.transci.2020.102806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/29/2020] [Accepted: 05/01/2020] [Indexed: 12/27/2022]
Abstract
BACKGROUND Anti-blood group antibody titers (ABTs) reported in titer values are variable depending on the testing method used. The introduction of new test methods such as automated methods requires proper method comparison. In this study, the automated blood bank system and manual tube method for ABT were compared using a log-transformed dataset to evaluate the alternative statistical approach. METHODS ABT was conducted using specimens referred for solid organ transplantation. Methods for comparison were conventional manual tube method and IH-500 automated blood bank system using column agglutination (CAT). Criteria for agreement were exact match and 1-titer match. Measured titer values were log-transformed into interval scale for Deming regression analysis. RESULTS From the comparison of the tube and CAT methods using titer values and the two criteria, the exact and 1-titer match were 15.9-41.5 % and 65.9-97.6 %, respectively. Deming regression was used to demonstrate the presence of both proportional and constant difference between the two methods. CONCLUSION The method comparison using conventional statistical approaches had limits due to the semi-quantitative value of the test. Log-transformed interval scale values for comparison were useful for interpretation of method comparison datasets. This alternative statistical approach could contribute to a more accurate comparison between assays and standardization of ABT testing.
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Affiliation(s)
- John Jeongseok Yang
- Department of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, South Korea
| | - Suk Won Seo
- Department of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, South Korea
| | - Jin Seok Kim
- Department of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, South Korea
| | - Yousun Chung
- Department of Laboratory Medicine, Kangdong Sacred Heart Hospital, Seoul, South Korea
| | - Hyungsuk Kim
- Department of Laboratory Medicine, Seoul National University Hospital, Seoul, South Korea
| | - Dae-Hyun Ko
- Department of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, South Korea.
| | - Sang-Hyun Hwang
- Department of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, South Korea
| | - Oh Heung-Bum
- Department of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, South Korea
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Obeid R, Schön C, Wilhelm M, Shrestha RP, Pilz S, Pietrzik K. Response of Red Blood Cell Folate to Supplementation in Nonpregnant Women is Predictable: A Proposal for Personalized Supplementation. Mol Nutr Food Res 2018; 62:1700537. [PMID: 29143484 PMCID: PMC5838518 DOI: 10.1002/mnfr.201700537] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 09/25/2017] [Indexed: 11/07/2022]
Abstract
SCOPE We modeled red blood cell (RBC)-folate response to supplementation and developed personalized folate supplementation concepts. METHODS AND RESULTS The changes of RBC-folate were modeled in a time- (4 or 8 weeks) and dose- (400 or 800 μg d-1 folate) dependent manner. Post-supplementation RBC-folate levels were predicted from folate-loading capacities (= measured RBC-folate - [baseline RBC-folate × RBC-survival]). The prediction equations were validated in 119 participants. The median increase of RBC-folate was higher in the 800 μg d-1 than in the 400 μg d-1 group (275 vs 169 nmol L-1 after 4 weeks, and 551 vs 346 nmol L-1 after 8 weeks). Medians (interquartile range) of RBC-folate loading were (4 weeks: 299 (160) vs 409 (237) nmol L-1 ) and (8 weeks: 630 (134) versus 795 (187) nmol L-1 ) in the 400 and 800 μg d-1 group, respectively. The individual measured and predicted RBC-folate values (after 4 weeks/400 μg d-1 = 25 + 1.27 × baseline RBC-folate) and (after 4 weeks/800 μg d-1 = 65 + 1.41 × baseline RBC-folate) did not differ significantly. The measured and predicted concentrations showed high agreement in the validation cohort. CONCLUSIONS The models can guide nutritional recommendations in women when baseline RBC-folate concentrations are measured and the time to pregnancy between 4 and 8 weeks.
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Affiliation(s)
- Rima Obeid
- Department of Clinical ChemistrySaarland University HospitalHomburgGermany
- Aarhus Institute of Advanced StudiesUniversity of AarhusAarhus CDenmark
| | | | - Manfred Wilhelm
- Department of Mathematics, Natural and Economic SciencesUniversity of Applied Sciences UlmUlmGermany
| | | | - Stefan Pilz
- Division of Endocrinology and DiabetologyDepartment of Internal MedicineMedical University of GrazGrazAustria
| | - Klaus Pietrzik
- Department of Nutrition and Food ScienceRheinische Friedrich‐Wilhelms UniversityBonnGermany
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Optimization of free-breathing whole-heart 3-dimensional cardiac magnetic resonance imaging at 3 tesla to identify coronary vein anatomy and to compare with multidetector computed tomography. J Comput Assist Tomogr 2015; 38:941-8. [PMID: 24983436 DOI: 10.1097/rct.0000000000000131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE This study optimizes use of 3-T magnetic resonance imaging (MRI) to delineate coronary venous anatomy and compares 3-T MRI with multidetector computed tomography (MDCT) measurements. METHODS The study population included 37 consecutive subjects (22 men, 19-71 years old). Whole-heart contrast-enhanced MRI images at 3 T were acquired using segmented k-space gradient echo with inversion recovery prepared technique. The MDCT images were obtained using nonionic iodinated contrast. RESULTS The coronary sinus and great cardiac, posterior interventricular, and anterior interventricular veins were visualized in 100% of cases by both MRI and MDCT. Detection of the posterior vein of the left ventricle and the left marginal vein by MRI was 97% and 81%, respectively. Bland-Altman plots showed agreement in ostial diameter measured by both modalities with correlation coefficients ranging from 0.5 to 0.76. Vein length and distances also agreed closely. CONCLUSIONS Free-breathing whole-heart 3-dimensional MRI at 3 T provides high-spatial-resolution images and could offer an alternative imaging technique instead of MDCT scans.
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Kim JH, Kim KB, Kim WC, Kim JH, Kim HY. Accuracy and precision of polyurethane dental arch models fabricated using a three-dimensional subtractive rapid prototyping method with an intraoral scanning technique. Korean J Orthod 2014; 44:69-76. [PMID: 24696823 PMCID: PMC3971128 DOI: 10.4041/kjod.2014.44.2.69] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 08/13/2013] [Accepted: 08/19/2013] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE This study aimed to evaluate the accuracy and precision of polyurethane (PUT) dental arch models fabricated using a three-dimensional (3D) subtractive rapid prototyping (RP) method with an intraoral scanning technique by comparing linear measurements obtained from PUT models and conventional plaster models. METHODS Ten plaster models were duplicated using a selected standard master model and conventional impression, and 10 PUT models were duplicated using the 3D subtractive RP technique with an oral scanner. Six linear measurements were evaluated in terms of x, y, and z-axes using a non-contact white light scanner. Accuracy was assessed using mean differences between two measurements, and precision was examined using four quantitative methods and the Bland-Altman graphical method. Repeatability was evaluated in terms of intra-examiner variability, and reproducibility was assessed in terms of inter-examiner and inter-method variability. RESULTS The mean difference between plaster models and PUT models ranged from 0.07 mm to 0.33 mm. Relative measurement errors ranged from 2.2% to 7.6% and intraclass correlation coefficients ranged from 0.93 to 0.96, when comparing plaster models and PUT models. The Bland-Altman plot showed good agreement. CONCLUSIONS The accuracy and precision of PUT dental models for evaluating the performance of oral scanner and subtractive RP technology was acceptable. Because of the recent improvements in block material and computerized numeric control milling machines, the subtractive RP method may be a good choice for dental arch models.
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Affiliation(s)
- Jae-Hong Kim
- Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Korea. ; Department of Public Health Sciences, Graduate School, Korea University, Seoul, Korea
| | - Ki-Baek Kim
- Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Korea. ; Department of Public Health Sciences, Graduate School, Korea University, Seoul, Korea
| | - Woong-Chul Kim
- Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Korea
| | - Ji-Hwan Kim
- Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Korea
| | - Hae-Young Kim
- Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Korea. ; Department of Public Health Sciences, Graduate School, Korea University, Seoul, Korea. ; BK21+ Program in Public Health Sciences, Korea University, Seoul, Korea
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Liang X, Chen J, Liu Y, He C, Li T. The effect of hypertension and diabetes management in Southwest China: a before- and after-intervention study. PLoS One 2014; 9:e91801. [PMID: 24632720 PMCID: PMC3954760 DOI: 10.1371/journal.pone.0091801] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2013] [Accepted: 02/14/2014] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Non-communicable diseases are leading causes of disease burden in middle income countries. Little evidence exists to determine if the primary healthcare system can effectively manage non-communicable diseases. The purpose of this study was to examine the effectiveness of hypertension and diabetes management by the primary healthcare system. METHODS We used individual level data from the 2009 National Basic Public Health Services System to assess the effectiveness of hypertension and diabetes interventions on fasting plasma glucose, and blood pressure. We analyzed the associations between fasting plasma glucose, systolic or diastolic blood pressure and risk factors. The estimated average intervention effect on data balanced with confounding variables was assessed. RESULTS 9543 individuals who had data for fasting plasma glucose, systolic blood pressure and diastolic blood pressure were included in this analysis. This study included 6681 patients with hypertension and 2222 with diabetes. The intervention lowered mean fasting plasma glucose by 0.5 mmol/L (0.4-0.6), lowered mean systolic blood pressure by 3.5 mm Hg (3.2-3.7), and lowered diastolic blood pressure by 2.9 mm Hg (2.7-3.2). Individuals who received medicinal treatment had 1.3 mmHg (0.8 to 1.8, P<0.01) lower diastolic blood pressure and 0.6 mmol/L (0.5-0.8, P<0.01) lower fasting plasma glucose than those who did not receive medicine. Generalized linear model indicated that medicinal treatment and baseline systolic blood pressure were significant positive predictors of change in systolic blood pressure. Age, living in urban areas and diabetic complications were significant negative predictors of change for systolic blood pressure. CONCLUSION The National Basic Public Health Services System in China using trained community healthcare workers and well-established guidelines can be effectively implement non-communicable disease prevention and management care paradigms.
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Affiliation(s)
- Xiaohua Liang
- Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Children's Hospital, Chongqing Medical University, Chongqing, People's Republic of China
- Centers for Disease Control and Prevention of Jiulongpo District, Chongqing, People's Republic of China
| | - Jie Chen
- Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Children's Hospital, Chongqing Medical University, Chongqing, People's Republic of China
| | - Youxue Liu
- Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Children's Hospital, Chongqing Medical University, Chongqing, People's Republic of China
| | - Chunling He
- Centers for Disease Control and Prevention of Jiulongpo District, Chongqing, People's Republic of China
| | - Tingyu Li
- Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Children's Hospital, Chongqing Medical University, Chongqing, People's Republic of China
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How to report reliability in orthodontic research: Part 1. Am J Orthod Dentofacial Orthop 2013; 144:156-61. [PMID: 23810057 DOI: 10.1016/j.ajodo.2013.03.014] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2013] [Revised: 03/01/2013] [Accepted: 03/01/2013] [Indexed: 11/23/2022]
Abstract
In reporting reliability, duplicate measurements are often needed to determine if measurements are sufficiently in agreement among the observers (interobserver agreement) and/or within the same observer (intraobserver agreement). Some reports are often analyzed inappropriately using paired t tests and/or correlation coefficients. The aim of this article is to highlight the statistical problems of reliability testing using paired t tests and correlation coefficients and to encourage good reliability reporting within orthodontic research. With regard to the complex issue of reliability, a simple and singular statistical approach is not available. However, some methods are better than others. A graphic technique based on the Bland-Altman plot that can be simultaneously applied for both intra- and interobserver reliability will also be discussed.
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Fodi E, McAreavey D, Abd-Elmoniem KZ, Ohayon J, Saba M, Elagha A, Pettigrew RI, Gharib AM. Pulmonary vein morphology by free-breathing whole heart magnetic resonance imaging at 3 Tesla versus breathhold multi-detector computed tomography. J Magn Reson Imaging 2013; 37:846-52. [PMID: 23172711 PMCID: PMC3584192 DOI: 10.1002/jmri.23865] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Accepted: 09/06/2012] [Indexed: 11/08/2022] Open
Abstract
PURPOSE To compare pulmonary vein and left atrial anatomy using three-dimensional free-breathing whole-heart magnetic resonance imaging (MR) at 3 Tesla (T) and multi-detector computed tomography (MDCT). MATERIALS AND METHODS Thirty-three subjects (19 male, age 49 ± 12 years) underwent free-breathing 3T MR and contrast-enhanced MDCT during inspiratory breath hold. Pulmonary vein parameters (ostial areas, diameters, angles) were measured. RESULTS All pulmonary veins and anomalies were identified by 3T MR and by MDCT. The right-sided pulmonary veins were directed more posteriorly, the right superior pulmonary vein more inferiorly, and the right inferior pulmonary vein more superiorly by 3T MR when compared with MDCT. The cross-sectional area, perimeters and minimum diameters of right-sided pulmonary vein ostia were significantly larger by MR, as were the maximum diameters of right and left inferior pulmonary veins. There were no significant differences between techniques in distance to first pulmonary vein branch. CONCLUSION Pulmonary vein measurements demonstrated significant differences in angulations and dimensions when 3T MR is compared with MDCT. These differences likely represent hemodynamic and respiratory variation during free-breathing with MR versus breath-holding with MDCT. MR imaging at 3T during free-breathing offers an alternate method to define pulmonary vein and left atrial anatomy without exposure to radiation.
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Affiliation(s)
- Eszter Fodi
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, USA
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Pearson RM, Evans BJW. A comparison of in-air and in-saline focimeter measurement of the back vertex power of spherical soft contact lenses. Ophthalmic Physiol Opt 2012; 32:508-17. [DOI: 10.1111/j.1475-1313.2012.00932.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Oftedal S, Bell KL, Mitchell LE, Davies PSW, Ware RS, Boyd RN. A systematic review of the clinimetric properties of habitual physical activity measures in young children with a motor disability. Int J Pediatr 2012; 2012:976425. [PMID: 22927865 PMCID: PMC3423928 DOI: 10.1155/2012/976425] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Revised: 04/04/2012] [Accepted: 04/23/2012] [Indexed: 11/17/2022] Open
Abstract
Aim. To identify and systematically review the clinimetric properties of habitual physical activity (HPA) measures in young children with a motor disability. Method. Five databases were searched for measures of HPA including: children aged <6.0 years with a neuromuscular disorder, physical activity defined as "bodily movement produced by skeletal muscles causing caloric expenditure", reported HPA as duration, frequency, intensity, mode or energy expenditure, and evaluated clinimetric properties. The quality of papers was assessed using the COSMIN-checklist. A targeted search of identified measures found additional studies of typically developing young children (TDC). Results. Seven papers assessing four activity monitors met inclusion criteria. Four studies were of good methodological quality. The Minimod had good ability to measure continuous walking but the demonstrated poor ability to measure steps during free-living activities. The Intelligent Device for Energy Expenditure and Activity and Ambulatory Monitoring Pod showed poor ability to measure activity during both continuous walking and free-living activities. The StepWatch showed good ability to measure steps during continuous walking in TDC. Interpretation. Studies assessing the clinimetric properties of measures of HPA in this population are urgently needed to allow assessment of the relationship between HPA and health outcomes in this group.
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Affiliation(s)
- Stina Oftedal
- Queensland Cerebral Palsy & Rehabilitation Research Centre, School of Medicine, The University of Queensland, Brisbane, QLD 4029, Australia
- Children's Nutrition Research Centre, School of Medicine, The University of Queensland, Brisbane, QLD 4029, Australia
- Queensland Children's Medical Research Institute, The Royal Children's Hospital, Brisbane, QLD 4029, Australia
- The Royal Children's Hospital, Herston, Brisbane, QLD 4029, Australia
| | - Kristie L. Bell
- Queensland Cerebral Palsy & Rehabilitation Research Centre, School of Medicine, The University of Queensland, Brisbane, QLD 4029, Australia
- Children's Nutrition Research Centre, School of Medicine, The University of Queensland, Brisbane, QLD 4029, Australia
- Queensland Children's Medical Research Institute, The Royal Children's Hospital, Brisbane, QLD 4029, Australia
- The Royal Children's Hospital, Herston, Brisbane, QLD 4029, Australia
| | - Louise E. Mitchell
- Queensland Cerebral Palsy & Rehabilitation Research Centre, School of Medicine, The University of Queensland, Brisbane, QLD 4029, Australia
- The Royal Children's Hospital, Herston, Brisbane, QLD 4029, Australia
| | - Peter S. W. Davies
- Children's Nutrition Research Centre, School of Medicine, The University of Queensland, Brisbane, QLD 4029, Australia
| | - Robert S. Ware
- Queensland Children's Medical Research Institute, The Royal Children's Hospital, Brisbane, QLD 4029, Australia
- School of Population Health, The University of Queensland, Brisbane, QLD 4006, Australia
| | - Roslyn N. Boyd
- Queensland Cerebral Palsy & Rehabilitation Research Centre, School of Medicine, The University of Queensland, Brisbane, QLD 4029, Australia
- Queensland Children's Medical Research Institute, The Royal Children's Hospital, Brisbane, QLD 4029, Australia
- The Royal Children's Hospital, Herston, Brisbane, QLD 4029, Australia
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Shah V, Dobiásová P, Baldrian P, Nerud F, Kumar A, Seal S. Influence of iron and copper nanoparticle powder on the production of lignocellulose degrading enzymes in the fungus Trametes versicolor. JOURNAL OF HAZARDOUS MATERIALS 2010; 178:1141-5. [PMID: 20185234 DOI: 10.1016/j.jhazmat.2010.01.141] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2009] [Revised: 01/27/2010] [Accepted: 01/28/2010] [Indexed: 05/20/2023]
Abstract
White rot fungi are one of the key group of microorganisms that help to enrich the soil via degradation of wood. In the current communication, influence of iron and copper nanoparticles on the production of lignocellulolytic enzymes by Trametes versicolor have been investigated. The production of enzymes in the presence of the two nanoparticles was compared to that of ferrous and cupric ions respectively. Results show that both the tested nanoparticles alter the production profile of the lignocellulolytic enzymes when compared to the control set. The production of laccase was not influenced by iron nanoparticles but was effected by copper nanoparticles within 24h of incubation. Both the nanoparticles decreased the production of beta-glucosidase, beta-xylosidase and cellobiohydrolase significantly. However, the production profile of Mn-peroxidase and remained statistically similar to that of control when the organism was incubated with iron and copper nanoparticles. The production profiles were also different when one compares the ionic form of metals and the nanoparticles, suggesting different mechanism of action of the particles on the organism. The difference in the production profile was not growth related as no significant difference was recorded for either form of iron and copper on the growth of T. versicolor.
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Affiliation(s)
- Vishal Shah
- Department of Biology, Dowling College, 150 Idle Hour Blvd., Oakdale, NY 11769, USA.
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Ohira SI, Dasgupta PK, Schug KA. Fiber Optic Sensor for Simultaneous Determination of Atmospheric Nitrogen Dioxide, Ozone, and Relative Humidity. Anal Chem 2009; 81:4183-91. [DOI: 10.1021/ac801756z] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shin-Ichi Ohira
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium Place, Arlington, Texas 76019-0065
| | - Purnendu K. Dasgupta
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium Place, Arlington, Texas 76019-0065
| | - Kevin A. Schug
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium Place, Arlington, Texas 76019-0065
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Geistanger A, Berding C, Vorberg E, Herlan M. Local regression: a new approach for measurement system comparison analysis. Clin Chem Lab Med 2008; 46:1211-9. [DOI: 10.1515/cclm.2008.267] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractA new graphical approach for analysis of measurement system comparison studies is proposed. Unlike the established linear regression and Bland-Altman analysis, it does not depend on the assumption of a linear relationship. We review the established analysis approaches and propose a difference plot with non-parametric regression as an adequate tool to describe the relationship between two measurement systems. Along with pre-defined level-dependent acceptance limits, this approach may provide evidence for metrological equivalence between two measurement systems. Several data examples are given to illustrate this approach.Clin Chem Lab Med 2008;46:1211–9.
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Fuller CD, Thomas CR, Schwartz S, Golden N, Ting J, Wong A, Erdogmus D, Scarbrough TJ. Method comparison of ultrasound and kilovoltage x-ray fiducial marker imaging for prostate radiotherapy targeting. Phys Med Biol 2006; 51:4981-93. [PMID: 16985282 DOI: 10.1088/0031-9155/51/19/016] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Several measurement techniques have been developed to address the capability for target volume reduction via target localization in image-guided radiotherapy; among these have been ultrasound (US) and fiducial marker (FM) software-assisted localization. In order to assess interchangeability between methods, US and FM localization were compared using established techniques for determination of agreement between measurement methods when a 'gold-standard' comparator does not exist, after performing both techniques daily on a sequential series of patients. At least 3 days prior to CT simulation, four gold seeds were placed within the prostate. FM software-assisted localization utilized the ExacTrac X-Ray 6D (BrainLab AG, Germany) kVp x-ray image acquisition system to determine prostate position; US prostate targeting was performed on each patient using the SonArray (Varian, Palo Alto, CA). Patients were aligned daily using laser alignment of skin marks. Directional shifts were then calculated by each respective system in the X, Y and Z dimensions before each daily treatment fraction, previous to any treatment or couch adjustment, as well as a composite vector of displacement. Directional shift agreement in each axis was compared using Altman-Bland limits of agreement, Lin's concordance coefficient with Partik's grading schema, and Deming orthogonal bias-weighted correlation methodology. 1,019 software-assisted shifts were suggested by US and FM in 39 patients. The 95% limits of agreement in X, Y and Z axes were +/-9.4 mm, +/-11.3 mm and +/-13.4, respectively. Three-dimensionally, measurements agreed within 13.4 mm in 95% of all paired measures. In all axes, concordance was graded as 'poor' or 'unacceptable'. Deming regression detected proportional bias in both directional axes and three-dimensional vectors. Our data suggest substantial differences between US and FM image-guided measures and subsequent suggested directional shifts. Analysis reveals that the vast majority of all individual US and FM directional measures may be expected to agree with each other within a range of 1-1.5 cm. Since neither system represents a gold standard, clinical judgment must dictate whether such a difference is of import. As IMRT protocols seek dose escalation and PTV reduction predicated on US- and FM-guided imaging, future studies are needed to address these potential clinically relevant issues regarding the interchangeability and accuracy of novel positional verification techniques. Comparison series with multiple image-guidance systems are needed to refine comparisons between targeting methods. However, we do not advocate interchangeability of US and FM localization methods.
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Affiliation(s)
- Clifton David Fuller
- Department of Radiation Oncology, University of Texas Health Science Center-San Antonio, USA
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