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Akbar Fotouhi

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https://www.readbyqxmd.com/read/27845549/assets-as-a-socioeconomic-status-index-categorical-principal-components-analysis-vs-latent-class-analysis
#1
Majid Sartipi, Saharnaz Nedjat, Mohammad Ali Mansournia, Vali Baigi, Akbar Fotouhi
BACKGROUND: Some variables like Socioeconomic Status (SES) cannot be directly measured, instead, so-called 'latent variables' are measured indirectly through calculating tangible items. There are different methods for measuring latent variables such as data reduction methods e.g. Principal Components Analysis (PCA) and Latent Class Analysis (LCA). OBJECTIVES: The purpose of our study was to measure assets index- as a representative of SES- through two methods of Non-Linear PCA (NLPCA) and LCA, and to compare them for choosing the most appropriate model...
November 2016: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/27803724/prevalence-of-hookah-smoking-and-its-related-factors-among-students-of-tehran-university-of-medical-sciences-2012-2013
#2
Abbas Abbasi-Ghahramanloo, Afarin Rahimi-Movaghar, Hojjat Zeraati, Saeid Safiri, Akbar Fotouhi
BACKGROUND: Hookah smoking has increased worldwide, especially among young people. OBJECTIVES: The aim of the present study was to determine the prevalence of hookah use and related factors in a sample of Iranian students of medical sciences. MATERIALS AND METHODS: A cross-sectional study was conducted on 1992 randomly selected sample of students of Tehran University of Medical Sciences during 2012 - 2013. A multistage sampling method was used and anonymous structured questionnaires were distributed to the students of each selected class...
June 2016: Iranian Journal of Psychiatry and Behavioral Sciences
https://www.readbyqxmd.com/read/27727492/retinal-nerve-fibre-layer-thickness-in-a-general-population-in-iran
#3
Hassan Hashemi, Mehdi Khabazkhoob, Payam Nabovati, Abbasali Yekta, Mohammad Hassan Emamian, Akbar Fotouhi
BACKGROUND: To determine retinal nerve fibre layer (RNFL) thickness distribution and its related factors in a general population of 45 to 69 year olds in Iran. DESIGN: Population-based cross-sectional study. PARTICIPANTS: Of the 5190 participants of phase one of Shahroud Eye Cohort Study, 4737 participated in Phase two (participation rate = 91.3%). METHODS: All study participants underwent visual acuity measurement, refraction tests, slit lamp examination and ophthalmoscopic fundus exam...
October 11, 2016: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/27588277/distribution-of-intraocular-pressure-and-its-determinants-in-an-iranian-adult-population
#4
Hassan Hashemi, Mehdi Khabazkhoob, Mohammad Hassan Emamian, Mohammad Shariati, Abbasali Yekta, Akbar Fotouhi
AIM: To determine the distribution of intraocular pressure (IOP) and its determinants in an Iranian population. METHODS: In a cross-sectional survey, random cluster sampling was conducted from the 40-64 years old population of Shahroud, in the north of Iran. All participants had optometry and ophthalmic exams. IOP was determined using the Goldmann tonometry method and biometric components were measured. RESULTS: Of the 6311 people selected for the study, 5190 (82...
2016: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/27579459/the-prevalence-of-ptosis-in-an-iranian-adult-population
#5
Hassan Hashemi, Mehdi Khabazkhoob, Mohammad Hassan Emamian, Abbasali Yekta, Ali Jafari, Payam Nabovati, Akbar Fotouhi
PURPOSE: To determine upper eyelid ptosis prevalence and some related factors in 44- to 69-year-olds of Shahroud in the north of Iran. METHODS: In 2009, using multi-stage cluster sampling, 300 clusters of 40-64-year-olds were selected in Shahroud city, and all 5190 participants were invited to be re-examined in 5 years (2014). The current report is the second phase of the study in which 4737 (91.3%) people participated and underwent vision tests, slit lamp examination, biometry, and ophthalmoscopy in 2014...
September 2016: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/27524898/subgrouping-of-risky-behaviors-among-iranian-college-students-a-latent-class-analysis
#6
Saeid Safiri, Afarin Rahimi-Movaghar, Masud Yunesian, Homayoun Sadeghi-Bazargani, Mansour Shamsipour, Mohammad Ali Mansournia, Akbar Fotouhi
BACKGROUND: Risky behaviors may interrupt development or cause considerable morbidity or mortality. This study's purpose was to determine subgroups of students based on risky behaviors and assess the prevalence of risky behaviors in each of the subgroups. PARTICIPANTS AND METHODS: This anonymous cross-sectional study was carried out in October 2015 and November 2015, with 1,777 students from Tabriz University of Medical Sciences, through multistage random sampling method...
2016: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/27516996/assessing-the-prevalence-of-publication-misconduct-among-iranian-authors-using-a-double-list-experiment
#7
Maryam Hadji, Fariba Asghari, Masoud Yunesian, Payam Kabiri, Akbar Fotouhi
BACKGROUND: This study was done to determine the prevalence of publication misconduct among Iranian authors. METHODS: Data were collected through an email survey of corresponding authors of papers published in Iranian journals indexed in Scopus during 2009-2011. Using the double list experiment, these individuals were indirectly questioned about committing one of the five misconducts including duplicate publication, falsification, guest authorship, plagiarism, and fabrication over the past year...
July 2016: Iranian Journal of Public Health
https://www.readbyqxmd.com/read/27476052/high-incidence-of-diabetes-mellitus-among-a-middle-aged-population-in-iran-a-longitudinal-study
#8
Hossein Ebrahimi, Mohammad Hassan Emamian, Hassan Hashemi, Akbar Fotouhi
OBJECTIVES: There are few data concerning the incidence rates of diabetes in Iran. This study aimed to determine the incidence of diabetes and its risk factors in a middle-aged population in Iran. METHODS: All of the people who participated in the first phase of the Shahroud eye cohort study were invited to the study in 2014; after signing informed consent forms, a total of 4737 people 45 to 69 years of age were enrolled in the second phase of the study (participation rate: 91...
December 2016: Canadian Journal of Diabetes
https://www.readbyqxmd.com/read/27415581/floppy-eyelid-syndrome-and-its-determinants-in-iranian-adults-a-population-based-study
#9
Hassan Hashemi, Hadith Rastad, Mohammad Hassan Emamian, Akbar Fotouhi
OBJECTIVES: To estimate the prevalence of floppy eyelid syndrome (FES) and to determine the associated factors in a representative sample of Iranian adult population aged 45 to 69 years. METHODS: The data were according to the second phase of Shahroud Eye Cohort Study performed in 2014 with 4,737 participants aged 45 to 69 years. Diagnosis of FES was made based on the clinical judgment of the ophthalmologist during ocular examinations. The percentage and confidence intervals (CIs) of the prevalence of FES were reported, and the associated factors were analyzed using simple and multiple logistic regression models...
July 13, 2016: Eye & Contact Lens
https://www.readbyqxmd.com/read/27302856/five-year-changes-in-central-and-peripheral-corneal-thickness-the-shahroud-eye-cohort-study
#10
Hassan Hashemi, Soheila Asgari, Mohammad Hassan Emamian, Shiva Mehravaran, Akbar Fotouhi
PURPOSE: To determine five year changes in corneal thickness from the apex to the 8mm periphery and related factors through a longitudinal population-based study of middle-aged Iranians. METHODS: In the first phase, 4670 of the 5190 participants, and in the second phase, 4666 of the 4737 participants were examined with the Pentacam. In this report, analysis was done on right eye data of 2509 people who had no diabetes, pterygium, or history of eye surgery, and their image quality was displayed as "ok"...
October 2016: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/27253831/the-prevalence-of-exfoliation-syndrome-in-an-iranian-population-aged-45-69-years
#11
Hassan Hashemi, Mehdi Khabazkhoob, Mohammad Hassan Emamian, Ali Jafari, Saman Mohazeb-Torabi, Akbar Fotouhi
PURPOSE: To determine the prevalence of exfoliation syndrome (XFS) and some of its related factors in an Iranian population aged 45-69 years. METHODS: In the first phase of the Shahroud Eye Cohort Study, 5190 people in 300 clusters from Shahroud city in the northeast of Iran participated in the study. The second phase of the study was conducted 5 years later in 2014. Vision testing, refraction, slit lamp examination, and fundus examination were performed for all participants...
October 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27239589/higher-order-aberrations-in-a-normal-adult-population
#12
Hassan Hashemi, Mehdi Khabazkhoob, Ebrahim Jafarzadehpur, Abbasali Yekta, Mohammad Hassan Emamian, Mohammad Shariati, Akbar Fotouhi
PURPOSE: To determine the distribution of Zernike coefficients and higher order aberrations in a normal population and its relationship with age, gender, biometric components, and spherical equivalent. METHODS: During the first phase of the Shahroud cohort study, 6311 people of the 40-64-year-old population of Shahroud city were selected through random cluster sampling. A subsample of participants was examined with Zywave aberrometer (The Bausch & Lomb, Rochester, NY) to measure aberrations...
September 2015: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/27239585/corneal-elevation-and-keratoconus-indices-in-a-40-to-64-year-old-population-shahroud-eye-study
#13
Hassan Hashemi, Asghar Beiranvand, Mehdi Khabazkhoob, Shiva Mehravaran, Mohammad Hassan Emamian, Abbasali Yekta, Mohammad Shariati, Akbar Fotouhi
PURPOSE: To determine the corneal elevation values and keratoconus indices in the 40- to 64-year-old population and their changes with aging. METHODS: The 6311 invitees of this study were selected through random cluster sampling, and 5190 of them participated in the study (response rate = 82.2%). Here, we analyzed results of Pentacam acquisitions in 4148 respondents. Cases of keratoconus and forme fruste keratoconus (FFKC) were determined using topography and clinical data...
September 2015: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/27110535/role-of-hematocrit-concentration-on-successful-extubation-in-critically-ill-patients-in-the-intensive-care-units
#14
Mohammad Taghi Beigmohammadi, Zahid Hussain Khan, Shahram Samadi, Ata Mahmoodpoor, Akbar Fotouhi, Abbas Rahimiforoushani, Mehrnaz Asadi Gharabaghi
BACKGROUND: Hematocrit (Hct) is an important parameter for optimal oxygenation during discontinuation from ventilator, but there is no consensus about its concentration and effectiveness on successful extubation. OBJECTIVES: The current study aimed to determine the role of Hct concentration on extubation failure in critically ill patients. PATIENTS AND METHODS: The current prospective cohort study investigated the effect of age, gender and Hct level on successful extubation of 163 mechanically ventilated patients in Imam Khomeini hospital intensive care units (ICUs), Tehran, Iran...
February 2016: Anesthesiology and Pain Medicine
https://www.readbyqxmd.com/read/27073259/retinopathy-of-prematurity-screening-criteria-in-iran-new-screening-guidelines
#15
Ramak Roohipoor, Reza Karkhaneh, Afsar Farahani, Nazanin Ebrahimiadib, Bobeck Modjtahedi, Akbar Fotouhi, Mehdi Yaseri, Alireza Khodabande, Mohammad Zarei, Marjan Imani Fuladi, Arash Taheri, Mohammad Riazi Esfahani, John Loewenstein
OBJECTIVE: To test the applicability of existing retinopathy of prematurity (ROP) guidelines on Iranian patients and to develop novel ROP screening criteria in Iran. METHODS: Both eyes of 1932 infants born ≤37 weeks of gestation and/or weighting ≤3000 g were included in this prospective cohort study that was conducted across nine neonatal intensive care units and a tertiary eye hospital ROP clinic. The patients were examined for ROP and the need for treatment (type 1 ROP or worse)...
July 2016: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/27059537/five-year-change-in-refraction-and-its-ocular-components-in-the-40-to-64-year-old-population-of-the-shahroud-eye-cohort-study
#16
Hassan Hashemi, Mehdi Khabazkhoob, Rafael Iribarren, Mohammad Hassan Emamian, Akbar Fotouhi
BACKGROUND: To assess 5-year refractive changes and their related factors in the 40- to 64-year-old population of Shahroud, Iran. DESIGN: Prospective cohort study. PARTICIPANTS: Of the 5190 participants of Phase I, 4737 participated in Phase II (response rate = 91.3%). METHODS: Participants were tested by refraction, visual acuity, slit-lamp biomicroscopy, ophthalmoscopy and biometry. Myopia was defined as a spherical equivalent more negative than -0...
November 2016: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/27051484/hyperopia-and-lens-power-in-an-adult-population-the-shahroud-eye-study
#17
Rafael Iribarren, Hassan Hashemi, Mehdi Khabazkhoob, Ian G Morgan, Mohammad Hassan Emamian, Mohammad Shariati, Akbar Fotouhi
PURPOSE: To explore the relationship between lens power and refractive error in older adults following age-related hyperopic shifts. METHODS: From the Shahroud Eye Cohort Study, subjects aged 55-64 years without clinically significant cataracts (with nuclear opacity of grade 0 to 1) were included to maximize the proportion of subjects with age-related hyperopic shifts that normally occur between 40 to 60 years of age, before interference from the myopic shift due to nuclear cataracts...
October 2015: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/27033172/dyslipidemia-and-its-risk-factors-among-urban-middle-aged-iranians-a-population-based-study
#18
Hossein Ebrahimi, Mohammad Hassan Emamian, Hassan Hashemi, Akbar Fotouhi
AIMS: Dyslipidemia is a known risk factor for cardiovascular disease and is a leading cause of mortality in developed and developing countries. This study was aimed to determine the prevalence of dyslipidemia and its risk factors in an urban group of Iranian adult population. METHODS: In this study, based on the criteria set by the National Cholesterol Education Program, the prevalence of dyslipidemia was evaluated in a population of 4737 people aged 45-69 years who participated in the second phase of an ophthalmology cohort study in Shahroud...
July 2016: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/26854319/opd-scan-iii-a-repeatability-and-inter-device-agreement-study-of-a-multifunctional-device-in-emmetropia-ametropia-and-keratoconus
#19
Soheila Asgari, Hassan Hashemi, Ebrahim Jafarzadehpur, Alireza Mohamadi, Farhad Rezvan, Akbar Fotouhi
The purpose of this study was to test the measurements of a multifunctional device, the NIDEK OPD-Scan III in terms of repeatability and agreement with retinoscopy and Pentacam in cases with emmetropia, ametropia, and KCN (grade 1-3). We enrolled 170 eyes (40 in each group of emmetropia and ametropia, and 90 in the 3 KCN subgroups). Acquisitions were done twice by a single technician to check the intra class correlation, repeatability index, and precision. To assess agreement, we compared OPD-Scan III with retinoscopy and Pentacam results by two blinded technicians...
October 2016: International Ophthalmology
https://www.readbyqxmd.com/read/26797172/complications-of-cataract-surgery-in-iran-trend-from-2006-to-2010
#20
Hassan Hashemi, Mehdi Khabazkhoob, Farhad Rezvan, Koroush Etemad, Hamidreza Gilasi, Soheila Asgari, Alireza Mahdavi, Saman Mohazzab-Torabi, Akbar Fotouhi
PURPOSE: To determine intraoperative complications of cataract surgery over the period 2006 to 2010. METHODS: In this cross-sectional study, 106 of 272 cataract surgical centers in Iran were selected through multistage random cluster sampling from all provinces. In each province, the selected number of centers was proportionate to the number of cataract surgeries, and in each center, the selected number of charts was proportionate to the center's number of cataract surgeries, from which we retrieved intraoperative complications...
2016: Ophthalmic Epidemiology
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