Filters








229 Hits in 9.5 sec

Differential Impact of Unilateral and Bilateral Classifications of Diabetic Retinopathy and Diabetic Macular Edema on Vision-Related Quality of Life

Ryan Eyn Kidd Man, Eva K. Fenwick, Charumathi Sabanayagam, Ling-Jun Li, Ching Siong Tey, Hasita Jian Tai Soon, Gemmy Chui-Ming Cheung, Gavin Siew Wei Tan, Tien Yin Wong, Ecosse L. Lamoureux
2016 Investigative Ophthalmology and Visual Science  
Differential impact of unilateral and bilateral classifications of diabetic retinopathy and diabetic macular edema on visionrelated quality of life. Invest Ophthalmol Vis Sci. 2016;57:4655-4660.  ...  An IVI composite score for each individual was generated from the Rasch model and used in statistical analyses.  ...  Presence of diabetes was defined as physician-diagnosed diabetes, and with the information retrieved from participants' case notes.  ... 
doi:10.1167/iovs.16-20165 pmid:27603726 fatcat:bisyrvweafbapoca4wlyrzzaaq

Dimensions Used in Instruments for QALY Calculation: A Systematic Review

Moustapha Touré, Christian R. C. Kouakou, Thomas G. Poder
2021 International Journal of Environmental Research and Public Health  
For the dimensions' and levels' selection, item response theory, Rasch analysis, and literature review were mostly used.  ...  Dimensions and levels were validated by methods like the Loevinger H, the standardised response mean, or discussions with experts in the field.  ...  Acknowledgments: We acknowledge the reviewers for their important comments. We thank Jie He from the University of Sherbrooke for her support.  ... 
doi:10.3390/ijerph18094428 pmid:33919471 fatcat:acwrgoohlbhublfu7yepv5lyly

Longitudinal Changes in Quality of Life and Rates of Progressive Visual Field Loss in Glaucoma Patients

Felipe A. Medeiros, Carolina P.B. Gracitelli, Erwin R. Boer, Robert N. Weinreb, Linda M. Zangwill, Peter N. Rosen
2015 Ophthalmology (Rochester, Minn.)  
Keywords Rate of visual field loss; quality of life; NEI VFQ-25; Rasch model and glaucoma  ...  Rasch analysis was performed to obtain final scores of disability as measured by the NEI VFQ-25.  ...  Person and item measures were examined for fit to the Rasch model using infit and outfit item fit statistics.  ... 
doi:10.1016/j.ophtha.2014.08.014 pmid:25444345 pmcid:PMC4306625 fatcat:pbriexx25zg4fngwdeyrdqifue

The SAS Macro-Program %AnaQol to Estimate the Parameters of Item Responses Theory Models

J. -B. Hardouin, M. Mesbah
2007 Communications in statistics. Simulation and computation  
Usual and general statistical packages like SAS do not allow users to perform classical analysis of items or to estimate parameters of most used models in this specific field: the practitioners must use  ...  Its maximum likelihood estimator, under the assumption of a normal distribution of the error and the parallel model, is known as Cronbach's Alpha Coefficient (CAC) (Cronbach, 1951):  ...  Acknowledgment The authors would like to particularly thank Véronique Sebille of the University of Nantes for her hepful comments and suggestions.  ... 
doi:10.1080/03610910601158351 fatcat:2pjve3rgfjdxjpml6wwovdadcu

Development and validation of an instrument to measure patient engagement in Hong Kong Special Administrative Region, China

Xu RH, Cheung AWL, Wong ELY
2018 Patient Preference and Adherence  
Rasch analysis also confirmed that the model has a good fit (ranging from 0.662 to 1.294). All domains were considered internally consistent (alpha >0.7).  ...  Rasch model and differential item functioning were also used to further confirm the fit of the instrument. Results: In all, 324 participants successfully completed the survey.  ...  field of health care, mainly attributed to the change in disease epidemiology from infectious to chronic. 6 This change informed the medical professionals that the old paradigm of the health care system  ... 
doaj:22777a00bbca49b0ac0b593d323e89fa fatcat:2daaivor6bdwxbjoqo6ixiylhm

Is the Pediatric Quality of Life Inventory Valid for Use in Preschool Children with Refractive Errors?

Ecosse L. Lamoureux, Manjula Marella, Benjamin Chang, Mohamed Dirani, Au Eong Kah-Guan, Audrey Chia, Terry L. Young, Tien Y. Wong, Seang Mei Saw
2010 Optometry and Vision Science  
The outcome measures were the overall score, and the "physical"; "emotional"; "social"; and "school" functioning subscales. Rasch analysis was used to validate the PedsQL 4.0.  ...  The PedsQL 4.0 overall and subscale scores displayed substantial multidimensionality as the variance values explained by the measures was <25% in both groups.  ...  Acknowledgments We thank the contributions made by the STARS team and the kind participation of all individuals in the STARS project.  ... 
doi:10.1097/opx.0b013e3181f6fb84 pmid:20852452 pmcid:PMC4041332 fatcat:qemb3p52qvcqjbsdy6segvmwom

The use of patient-reported outcome research in modern ophthalmology: impact on clinical trials and routine clinical practice

Tasanee Braithwaite, Melanie Calvert, Alastair Gray, Konrad Pesudovs, Alastair Denniston
2019 Patient Related Outcome Measures  
We highlight recent examples of the use of PROMs as secondary outcome measures in randomized controlled clinical trials and consider the impact they have had.  ...  This review article considers the rising demand for patient-reported outcome measures (PROMs) in modern ophthalmic research and clinical practice.  ...  Rasch analysis is a special case of IRT, where the data are fit to a simple measurement model. This creates valid measurement to which parametric statistics can be applied.  ... 
doi:10.2147/prom.s162802 pmid:30774489 pmcid:PMC6352858 fatcat:3jopyhntgnae5diww5s6owh2gy

Latent structure of the Hospital Anxiety And Depression Scale: A 10-year systematic review

Theodore D. Cosco, Frank Doyle, Mark Ward, Hannah McGee
2012 Journal of Psychosomatic Research  
be targeted to more general measurement of distress.  ...  While the HADS has been shown to be an effective measure of emotional distress, its inability to consistently differentiate between the constructs of anxiety and depression means that its use needs to  ...  MeSH) and as a keyword.  ... 
doi:10.1016/j.jpsychores.2011.06.008 pmid:22325696 fatcat:giogtscluzgppb3b6luucy6mcm

Methods for evaluating quality of life and vision in patients undergoing lens refractive surgery

Andrzej Grzybowski, Piotr Kanclerz, Maria Muzyka-Woźniak
2019 Graefe's Archives for Clinical and Experimental Ophthalmology  
Conclusions This review describes the existing PROs instruments and informs the choice of an appropriate measure in lens refractive surgery.  ...  Rasch-developed tools should be utilized for measuring quality of life and vision in patients undergoing lens refractive surgery and there is a number of highly robust tools available.  ...  It was qualified to the best papers of the year session in cataract refractive surgery at American Academy of Ophthalmology annual meeting, New Orleans, November 11-14, 2017  ... 
doi:10.1007/s00417-019-04270-w fatcat:a7q4rwq4qneipczqm7x7igi5vi

Comparison of applications used to help the elderly [chapter]

Liza Privošnik, Maša Sedej Knezović, Lara Šinkovec, Andrej Starc
2021 Zdravje starostnikov / Health of the Elderly  
The literature search took place from March 2021 to April 2021.  ...  Specifically, the technology for older adults is addressed for content that the elderly have the most needs in.  ...  The keywords we used for searching literature were: elderly, technology, mobile application and ICT.  ... 
doi:10.26493/978-961-293-129-2.157-165 fatcat:fnusoxo7vbfglley3xj3h3cmhe

Quantitative morphology of the rat kidney during diabetes mellitus and insulin treatment

R. Rasch, J. Dørup
1997 Diabetologia  
Information on kidney morphology in hyperglycaemia and normoglycaemia is a prerequisite to understanding better the physiological abnormalities found in diabetic patients.  ...  However, little is known about how fast the morphology changes following normalization of BG by insulin treatment and about the morphology of the diabetic kidney after insulin treatment or fasting.  ...  This study was financially supported by the Danish Medical Research Council, the Danish Diabetes Association, the NOVO Foundation, the Ruth Kö nig Pedersen Foundation, Fonden til Laegevidenskabens Fremme  ... 
doi:10.1007/s001250050752 pmid:9243101 fatcat:tpvhb6472jfvzixa5ybe65oxfi

Translation and Validation of Computer Vision Syndrome Scale 17 (CVSS 17) – The Malay Version

Mazapuspavina Md-Yasin, Nor Shazatul Salwana Din, Zahirah Tharek, Nor Azimah Abd Aziz, Mariam Mohamad
2022 International Medical Journal Malaysia  
The CVSS17 underwent forward-backward translation, face validation, and field testing to produce the Malay version.  ...  In comparison to the original version, 4 items (A2, A22, A28, A30) were swapped from internal to external symptom factors and 2 items (C16 and C23) swapped from external to internal symptom factors.  ...  Phase 1 : 1 it was developed in 2014 by M Gonzalez-Perez et.al. using a Rasch model.  ... 
doi:10.31436/imjm.v21i2.1963 fatcat:3m6muc3bjbf25ox6sehrc2n2am

Assessing Competencies Needed to Engage With Digital Health Services: Development of the eHealth Literacy Assessment Toolkit

Astrid Karnoe, Dorthe Furstrand, Karl Bang Christensen, Ole Norgaard, Lars Kayser
2018 Journal of Medical Internet Research  
Rasch models (RM) examined the fit of data. Tools were reduced in items to secure robust tools fit for screening purposes.  ...  The fit to the RM was acceptable (Anderson CLR=30.3, df=17, P=.02), and CCA was .94. Tool 6 was reduced from 5 to 4 items.  ...  Acknowledgments The study has received funding from The Danish Health Foundation (grant 15-B-0237).  ... 
doi:10.2196/jmir.8347 pmid:29748163 pmcid:PMC5968212 fatcat:nqzuimrt2zfntbdyyuwezjqqga

Wayfinding and Glaucoma: A Virtual Reality Experiment

Fábio B. Daga, Eduardo Macagno, Cory Stevenson, Ahmed Elhosseiny, Alberto Diniz-Filho, Erwin R. Boer, Jürgen Schulze, Felipe A. Medeiros
2017 Investigative Ophthalmology and Visual Science  
Wayfinding experiments were modeled after the Morris water maze navigation task and conducted in an immersive VR environment.  ...  The purpose of this study was to investigate the impact of glaucomatous visual field loss on wayfinding behavior using an immersive virtual reality (VR) environment. METHODS.  ...  Visual acuity was measured using the Early Treatment Diabetic Retinopathy Study chart, and letter acuity was expressed as the logarithm of the minimum angle of resolution.  ... 
doi:10.1167/iovs.17-21849 pmid:28687845 pmcid:PMC5499646 fatcat:u3lpsop6ejcdrgyhygvnqe4lh4

Psychometric validation techniques applied to the IND-VFQ-33 visual function questionnaire: the Hyderabad ocular morbidity in the elderly study (HOMES)

William Mitchell, Srinivas Marmamula, Nazlee Zebardast, Weiwen Ng, Joseph J. Locascio, Thirupathi Kumbam, Satya Brahmanandam, Navya Rekha Barrenkala
2021 BMC Medical Research Methodology  
Background Over 2 billion people suffer from vision impairment or blindness globally, and access to validated visual measurement tools in imperative in accurately describing and managing the burden of  ...  Next, an unrotated and oblique Promax rotated factor analysis, item response theory (IRT, using a graded response model (GRM)), and differential item functioning (DIF) testing were applied to the IND-VFQ  ...  In 2012, Gothwal and colleagues fit Rasch models to each of these 3 domains. Based on lack of fit to the model, they recommended deleting the visual symptoms and psychosocial impact scales.  ... 
doi:10.1186/s12874-021-01217-w pmid:33546603 fatcat:ircsl24kczco5hm4yuz7okvkhe
« Previous Showing results 1 — 15 out of 229 results