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Article ; Online: A Modification on Intra Class Correlation Estimation for Ordinal Scale Variable Using Latent Variable Model

Samira Chaibakhsh / Asma Poorhosseingholi

Journal of Biostatistics and Epidemiology, Vol 9, Iss

2023 Volume 1

Abstract: Background: A common way for computing test-retest reliability is Intra Class Correlation which was developed for continuous variables. But it widely used to assess test-retest reliability in questionnaires with Likert scales. Most of the time ... ...

Abstract	Background: A common way for computing test-retest reliability is Intra Class Correlation which was developed for continuous variables. But it widely used to assess test-retest reliability in questionnaires with Likert scales. Most of the time consecutive numbers regarded as option labels of a question. If the probability of choosing options be the same, using this method is logic, otherwise it is not. Therefore, in this study a modified estimator of ICC is proposed to improve the estimation of ICC for ordinal scale by using latent variable model. Method: In this method test-retest answers were considered as bivariate variables and cumulative Probit latent variable model was fitted. A simulation study with N=1500 replicates was conducted to compare the ICC estimations of Likert scale approach with a latent variable approach. Different sample sizes (n=20, 30) was generated with different correlation parameters. The simulations were repeated for questions with 3 and 5 options with different probability of selecting options of a question. After that the two approaches were run on Beck for suicidal ideation questionnaire. Result: In general the difference between Likert scale approach and latent variable approach were higher in 3 question options compared to 5 and also by increasing sample size and correlation between bivariate data, Root Mean Square Errors and bias were decreased. Assuming different probabilities for options, there was a considerably difference between Root Mean Square Errors, bias and standard deviation of estimation of ICC in two models. Using latent variable approach resulted less bias, SD and Root Mean Square Errors especially in lower sample sizes. Conclusion: Simulations showed when the probability of choosing options of a question are skewed, using this method reduced Root Mean Square Errors especially when the options are less. This method was affected more on standard deviation compare to bias of estimations.
Keywords	intra class correlation ; reliability ; latent variable ; multivariate model ; test-retest ; Biology (General) ; QH301-705.5 ; Probabilities. Mathematical statistics ; QA273-280
Subject code	310
Language	English
Publishing date	2023-03-01T00:00:00Z
Publisher	Tehran University of Medical Sciences
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Comment on: "Meta-analysis of ocular axial length in newborns and infants up to 3 years of age".

Aghajani, Ali / Chaibakhsh, Samira

Survey of ophthalmology

2021 Volume 67, Issue 2, Page(s) 631–632

MeSH term(s)	Humans ; Infant ; Infant, Newborn ; Refraction, Ocular ; Refractive Errors
Language	English
Publishing date	2021-12-11
Publishing country	United States
Document type	Editorial ; Comment
ZDB-ID	391346-6
ISSN	1879-3304 ; 0039-6257
ISSN (online)	1879-3304
ISSN	0039-6257
DOI	10.1016/j.survophthal.2021.11.010
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Article ; Online: The Prevalence of Undiagnosed Ptosis Among Candidates for Upper Eyelid Blepharoplasty.

Eshraghi, Bahram / Pourazizi, Mohsen / Taghian, Akbar / Chaibakhsh, Samira / Aghajani, Ali

Aesthetic surgery journal. Open forum

2023 Volume 5, Page(s) ojad079

Language	English
Publishing date	2023-09-01
Publishing country	England
Document type	Journal Article
ISSN	2631-4797
ISSN (online)	2631-4797
DOI	10.1093/asjof/ojad079
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Article ; Online: Assessment of the relationship between structural and functional tests in patients with idiopathic intracranial hypertension.

Abri Aghdam, Kaveh / Soltan Sanjari, Mostafa / Chaibakhsh, Samira / Fathi, Zahra / Kazemi, Pegah / Aghajani, Ali

International ophthalmology

2024 Volume 44, Issue 1, Page(s) 121

Abstract: Purpose: To assess the relationship between structural and functional tests in mild and moderate idiopathic intracranial hypertension (IIH).: Methods: Patients with mild and moderate IIH and a control group were enrolled. Best-corrected visual acuity ...

Abstract	Purpose: To assess the relationship between structural and functional tests in mild and moderate idiopathic intracranial hypertension (IIH). Methods: Patients with mild and moderate IIH and a control group were enrolled. Best-corrected visual acuity (BCVA), macular ganglion cell layer (MGCL) thickness, peripapillary retinal nerve fiber layer (pp RNFL) thickness, perimetric mean deviation (MD), and photopic negative responses (PhNR) of the electroretinogram were recorded. The associations between structural (pp RNFL and MGCL thickness) and functional (PhNR amplitude, MD and BCVA) parameters were assessed. Results: 154 eyes from 78 subjects (74 eyes from IIH patients and 80 eyes from healthy subjects) were included in this comparative observational study. The MGCL thickness, VA, pp RNFL, and PhNR base-to-trough (BT) amplitude were significantly worse in moderate IIH. The BCVA and MD were associated with MGCL thickness only in moderate IIH. The relationship between MD and MGCL thickness started when MD fell below -5.7 dB. Conclusions: The association between functional and structural parameters varies between mild and moderate IIH. The MD and MGCL thickness outperformed in assessing disease severity in mild and moderate IIH, respectively. The association between MD and MGCL thickness could be considered in IIH severity categorization.
MeSH term(s)	Humans ; Electroretinography ; Pseudotumor Cerebri/diagnosis ; Retina ; Retinal Ganglion Cells/physiology ; Tomography, Optical Coherence ; Visual Fields
Language	English
Publishing date	2024-03-01
Publishing country	Netherlands
Document type	Comparative Study ; Journal Article ; Observational Study
ZDB-ID	800087-6
ISSN	1573-2630 ; 0165-5701
ISSN (online)	1573-2630
ISSN	0165-5701
DOI	10.1007/s10792-024-03054-4
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Zs.A 1479: Show issues

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Article: Comment on "Predicting the mortality due to Covid-19 by the next month for Italy, Iran and South Korea; a simulation study".

Chaibakhsh, Samira / Vahedi, Mohsen

Gastroenterology and hepatology from bed to bench

2020 Volume 13, Issue 4, Page(s) 419–420

Language	English
Publishing date	2020-11-02
Publishing country	Iran
Document type	Journal Article
ZDB-ID	2569124-7
ISSN	2008-4234 ; 2008-2258
ISSN (online)	2008-4234
ISSN	2008-2258
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Article ; Online: Assessing the success rate of treatment in simple and complex congenital nasolacrimal duct obstruction: a systematic review and meta-analysis.

Eshraghi, Bahram / Babaei, Leila / Moradi, Maryam / Chaibakhsh, Samira / Aghajani, Ali

Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie

2023

Abstract: Purpose: To assess and compare the success rate (SR) of probing and intubation in patients with congenital nasolacrimal duct obstruction (CNLDO).: Methods: We conducted a literature search for identifying relevant studies published in English using ... ...

Abstract	Purpose: To assess and compare the success rate (SR) of probing and intubation in patients with congenital nasolacrimal duct obstruction (CNLDO). Methods: We conducted a literature search for identifying relevant studies published in English using PubMed, Google Scholar, Scopus, and Web of Science databases from the date of inception to Feb 2023. After extracting data, the SR was compared between the study groups: simple and complex CNLDO. To compare the treatment outcome, the mean difference of the SR was considered as the effect size. Random effects model or fixed effects model were performed for statistical inferences. Results: A total of 21 studies were eligible to be analyzed. The pooled SR of treatment was 88% in simple, and 57% in complex CNLDO. Exerting intubation in increased the SR from 87% (SR of probing) to 92% in simple CNLDO which was not significant. However, compared to probing, intubation has a significantly higher SR in complex CNLDO (46 to 82%). While the SR of probing was significantly lower in complex CNLDO, the difference between the SR of intubation was not significant between groups. Although increasing the age does not have an adverse effect on the SR in simple CNDLO, it causes a significant decrease in the SR of complex group. Conclusion: This study revealed that even though the addition of NLD intubation does not provide significant benefits beyond probing alone for patients with simple CNLDO, in children with complex CNLDO, NLD intubation should be considered as a primary treatment due to its substantial increase in surgical success rates. Delaying the treatment would increase its success in patients with complex but not the simple CNLDO.
Language	English
Publishing date	2023-12-07
Publishing country	Germany
Document type	Journal Article ; Review
ZDB-ID	8435-9
ISSN	1435-702X ; 0721-832X
ISSN (online)	1435-702X
ISSN	0721-832X
DOI	10.1007/s00417-023-06318-4
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Article ; Online: A meta-analysis of different von Hippel Lindau mutations: are they related to retinal capillary hemangioblastoma?

Azimi, Fatemeh / Aghajani, Ali / Khakpour, Golnaz / Chaibakhsh, Samira

Molecular genetics and genomics : MGG

2022 Volume 297, Issue 6, Page(s) 1615–1626

Abstract: Retinal capillary hemangioblastomas (RCH) is a benign tumor that represents the initial manifestation in roughly half of Von Hippel Lindau (VHL) patients. They may also occur sporadically without systemic involvement. A first meta-analysis study was ... ...

Abstract	Retinal capillary hemangioblastomas (RCH) is a benign tumor that represents the initial manifestation in roughly half of Von Hippel Lindau (VHL) patients. They may also occur sporadically without systemic involvement. A first meta-analysis study was investigated to estimate the prevalence of Retinal capillary hemangioblastoma (RCH) in Von Hippel Lindau (VHL) syndrome, and its relation to type and location of mutations in VHL gene. The electronic databases of PubMed, Scopus, Embase, and Google Scholar were utilized to find eligible papers published up to May 2020. Lastly, after the different prevalence of RCH in Europe compared to other continents was noted, we decided to consider European and non-European patients separately. The Random effect model was used to evaluate the relation between developing RCH and types of mutations. The overall prevalence of RCH among VHL patients is about 47%. The prevalence of RCH was significantly higher in Europe in comparison with non-Europeans (p value < 0.001). Overall, the differences between the prevalence of RCH among different mutation types were not statistically significant. However, in Europe, the prevalence of RCH was significantly higher in patients with truncation mutation (p value = 0.007). In Europe, the RCH in VHL patients who had a mutation in exon 2 was significantly lower in comparison with exon 1 (p value = 0.001); but in non-Europeans, the prevalence of RCH in VHL patients that involved exon 2 was significantly higher in comparison with VHL patients with a mutation in exon1 (p value = 0.012). The highest risk of developing RCH was reported among Europeans. Overall, this study showed that the prevalence of RCH in VHL syndrome is not related to type or location of mutations and difference of RCH prevalence is probably depends on other genetic or environmental factor that should be considered in subsequent studies.
MeSH term(s)	Humans ; Hemangioblastoma/epidemiology ; Hemangioblastoma/genetics ; Hemangioblastoma/pathology ; Von Hippel-Lindau Tumor Suppressor Protein/genetics ; von Hippel-Lindau Disease/epidemiology ; von Hippel-Lindau Disease/genetics ; von Hippel-Lindau Disease/pathology ; Retinal Neoplasms/epidemiology ; Retinal Neoplasms/genetics ; Retinal Neoplasms/pathology ; Mutation
Chemical Substances	Von Hippel-Lindau Tumor Suppressor Protein (EC 2.3.2.27)
Language	English
Publishing date	2022-08-25
Publishing country	Germany
Document type	Meta-Analysis ; Journal Article
ZDB-ID	2044817-X
ISSN	1617-4623 ; 1617-4615
ISSN (online)	1617-4623
ISSN	1617-4615
DOI	10.1007/s00438-022-01940-z
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Zs.A 1198: Show issues

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Article ; Online: Photobiomodulation therapy in mood disorders: a systematic review.

Montazeri, Katayoon / Farhadi, Mohammad / Fekrazad, Reza / Chaibakhsh, Samira / Mahmoudian, Saeid

Lasers in medical science

2022 Volume 37, Issue 9, Page(s) 3343–3351

Abstract: Mood disorders are common, debilitating and impose a high-cost burden on society. Side effects and resistance to psychiatric drugs justify finding new treatment methods. Photobiomodulation therapy (PBMT) uses photons of light to repair, modulate and ... ...

Abstract	Mood disorders are common, debilitating and impose a high-cost burden on society. Side effects and resistance to psychiatric drugs justify finding new treatment methods. Photobiomodulation therapy (PBMT) uses photons of light to repair, modulate and improve the function of target tissue. The purpose of this study is to systematically review the use of PBMT for the treatment of mood disorders and to identify the useful parameters of PBMT, the level of evidence of its effectiveness, and the degree of its practical recommendation. "Google scholar," "Pub Med," "Scopus," and "Science direct" online databases were searched based on Preferred Reporting Items for Systematic Reviews and meta-analyses (PRISMA) guidelines. The human or animal studies written in English and published from January 2009 to August 2021 were included. Sixteen studies, which included four randomized controlled trials (RCTs), met the inclusion criteria. Infrared wavelength ranges from 800 to 830 nm, power density of 250 mW/cm
MeSH term(s)	Animals ; Humans ; Low-Level Light Therapy ; Photons ; Risk Assessment
Language	English
Publishing date	2022-11-21
Publishing country	England
Document type	Systematic Review ; Journal Article ; Review
ZDB-ID	632808-8
ISSN	1435-604X ; 0268-8921
ISSN (online)	1435-604X
ISSN	0268-8921
DOI	10.1007/s10103-022-03641-w
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Article ; Online: Evaluation of the frequency of ABO and Rh-Hr blood-group systems in different acquired cataracts type.

Jafari, Reza / Ahmadi, Hanieh / Chaibakhsh, Samira / Rostamian Motlagh, Fatemeh / Heydarian, Samira / Ahmadzadeh Amiri, Ahmad / Farrokhfar, Asadollah / Rostami, Ghasem / Abounoori, Mahdi

BMC research notes

2023 Volume 16, Issue 1, Page(s) 245

Abstract: Objectives: This study evaluated the relationship between acquired cataract's different types and the ABO and Rh blood classes.: Methods: Overall, 520 patients, by randomized sampling method, participated in this retrospective cross-sectional study. ... ...

Abstract	Objectives: This study evaluated the relationship between acquired cataract's different types and the ABO and Rh blood classes. Methods: Overall, 520 patients, by randomized sampling method, participated in this retrospective cross-sectional study. After reviewing the patient's medical records and laboratory results, the patient's demographics, ABO group, Rh, and cataract type were documented. Results: A total of 520 patients were included in the research, with a mean age of 67.57 ± 11.85. Most of them were female (n = 286, 55%). Mix (n = 230, 44%) and nuclear sclerotic (NS) (n = 167, 32%) cataracts were the most common types. The posterior subcapsular cataract (PSC) prevalence in females was significantly higher than in males (16.1% vs.7.3% p = 0.002). Also, men had more NS cataracts than females (89, 38% vs. 78, 27.3%) (p = 0.009). Patients with PSC were significantly younger than others (all p-values < 0.001). Our results showed that cataract types are independent of blood group types and Rh (P > 0.05). Conclusion: Although our findings showed that cataract types are independent of blood group types and Rh, they can be compared with future studies on the association of other Blood-Group Systems in developing acquired cataracts.
MeSH term(s)	Male ; Humans ; Female ; Middle Aged ; Aged ; Rh-Hr Blood-Group System ; Retrospective Studies ; Cross-Sectional Studies ; Cataract/epidemiology ; ABO Blood-Group System
Chemical Substances	Rh-Hr Blood-Group System ; ABO Blood-Group System
Language	English
Publishing date	2023-09-30
Publishing country	England
Document type	Journal Article
ZDB-ID	2413336-X
ISSN	1756-0500 ; 1756-0500
ISSN (online)	1756-0500
ISSN	1756-0500
DOI	10.1186/s13104-023-06524-7
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Article ; Online: Paediatric myopia shift during the COVID-19 pandemic home quarantine: a systematic review and meta-analysis.

Abounoori, Mahdi / Aghajani, Ali / Chaibakhsh, Samira / Babakhanian, Masoudeh / Pourazizi, Mohsen / Peyman, Alireza

BMJ paediatrics open

2023 Volume 6, Issue 1

Abstract: Background: Outdoor activities were restricted during the COVID-19 outbreak, although digital learning grew. Concerns have been raised about the impact of these environmental changes on myopia status. This research aimed to examine myopia shift during ... ...

Abstract	Background: Outdoor activities were restricted during the COVID-19 outbreak, although digital learning grew. Concerns have been raised about the impact of these environmental changes on myopia status. This research aimed to examine myopia shift during the COVID-19 pandemic and offer the community evidence-based data. Methods: The literature search was undertaken in PubMed, SCOPUS, Science Direct, Web of Science and Google Scholar databases on published papers before 17 May 2022. The main outcome was mean spherical equivalent refraction (SER) before, at the onset and at the end of follow-up during the COVID-19 pandemic. Results: Among 518 articles, 10 studies were included in the meta-analysis. The mean SER differences during the COVID-19 pandemic follow-up (mean follow-up time was 10 months) compared with before the pandemic was 0.15 dioptre (D) (95% CI -0.39 to 0.69, p=0.58). After age adjustment using meta-regression, the mean SER differences during the COVID-19 follow-up compared with before the pandemic was - 0.46 D (95% CI -0.59 to -0.34, p<0.001). Over the mean follow-up time during the COVID-19 pandemic, the SER mean difference was -0.55 D (95% CI -0.78 to -0.32, p<0.001), showing that the mean SER had decreased significantly during the COVID-19 pandemic. The mean SER differences in myopic patients before COVID-19 compared with during the pandemic follow-up was -0.49 D (95% CI -0.53 to -0.45, p=0.00). So the prior pandemic myopic patients became more myopic during the pandemic follow-up time. Conclusion: During home quarantine, the mean SRE shifting in paediatrics accelerated. This phenomenon should be given more attention by policymakers, eyecare experts, educators and parents.
MeSH term(s)	Humans ; Child ; Pandemics ; Quarantine ; COVID-19/epidemiology ; Myopia/epidemiology ; Refraction, Ocular
Language	English
Publishing date	2023-01-14
Publishing country	England
Document type	Meta-Analysis ; Systematic Review ; Journal Article
ISSN	2399-9772
ISSN (online)	2399-9772
DOI	10.1136/bmjpo-2022-001755
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