scholarly journals Visual Sequelae of Computer Vision Syndrome: A Cross-Sectional Case-Control Study

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Mohammed Iqbal ◽  
Omar Said ◽  
Ola Ibrahim ◽  
Ashraf Soliman
Keyword(s):  
Computer Vision ◽  
Medical Students ◽  
Case Control Study ◽  
Case Control ◽  
Cross Sectional ◽  
Future Studies ◽  
Ocular Movements ◽  
Computer Vision Syndrome ◽  
Corrected Distance Visual Acuity ◽  
Control Study

Purpose. To assess the visual, ocular, extraocular, and multifocal electroretinography (mfERG) outcomes of computer vision syndrome (CVS) among medical students. Methods. This study was designed as a cross-sectional case-control study that included 733 medical students. All students completed a specially designed and validated CVS questionnaire survey (CVS-F3). Students from the control (No-CVS) and CVS groups underwent comprehensive ophthalmic examinations including the mfERG examinations. Our main outcome measures included uncorrected and corrected distance visual acuity (UDVA and CDVA, resp.) measurements, subjective and cycloplegic refractions, slit-lamp examination, intraocular pressure measurement, pupillary reflexes tests, ocular movements’ tests, dry eye disease tests, and fundus and mfERG examinations. Results. The CVS-F3 identified that 87.9% of students had complaints that might be related to CVS. We documented a 76% prevalence rate in students undergoing an ophthalmologic exam. The most common ocular and extraocular complaints included visual blur and headache (40.9% and 46.8%, resp.). Statistical logistic and linear regression analyses showed that refractive errors, prolonged screen-hours, close eye-screen distance, improper gaze angle, poor screen-resolution, and screen-glare were risk factors for developing CVS and influencing its severity. In the mfERG subgroup, 42.5% demonstrated reduced amplitudes of mfERG rings and quadrants, indicating reduced foveal responses. Conclusion. Surveys cannot yield an accurate CVS prevalence. However, they help to identify subjects at risk who should be comprehensively assessed to confirm or exclude CVS diagnosis. Smartphone misuse primarily caused CVS among users. Our mfERG findings might be a sign of potential CVS visual sequelae; however, future studies are warranted. Clinicians need to understand these sequelae to appropriately identify and treat CVS.

scholarly journals Cross-sectional case-control study on medical students’ psychosocial stress during COVID-19 pandemic in Hong Kong

Heliyon ◽  
2021 ◽  
pp. e08486
Author(s):  
Michael Co ◽  
Margaret Kay Ho ◽  
Alina Ashok Bharwani ◽  
Vernice Hui Yan Chan ◽  
Evelyn Hui Yi Chan ◽  
...  
Keyword(s):  
Hong Kong ◽  
Medical Students ◽  
Psychosocial Stress ◽  
Case Control Study ◽  
Case Control ◽  
Cross Sectional ◽  
Control Study

scholarly journals Prevalence of Balance Impairment and Factors Associated with Balance among Patients with Stroke. A Cross Sectional Retrospective Case Control Study

Healthcare ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 320
Author(s):  
Fayaz Khan ◽  
Mohamed Faisal Chevidikunnan
Keyword(s):  
Case Control Study ◽  
Binary Logistic Regression ◽  
Berg Balance Scale ◽  
Case Control ◽  
Knee Extensors ◽  
Retrospective Case ◽  
Cross Sectional ◽  
Balance Impairment ◽  
Factors Associated ◽  
Control Study

Stroke is a major cause of disability worldwide, and balance impairments are common disabling factors in patients with stroke, leading to falls. Thus, the study objectives were as follows: (i) To find the prevalence of balance impairment among patients with stroke. (ii) To find out the factors associated with balance impairment in patients with stroke. This cross-sectional retrospective case control study involved eighty-one post stroke patients with a mean age of 58.36 ± 14.06, recruited from six hospitals, who underwent an assessment of balance, walking speed, depression and isometric strength of the ankle and knee. These patients were later categorized into subjects with good balance (<45) in the Berg balance scale (BBS) and those with poor balance (≥45), as cases and controls, to assess the factors associated with balance impairment using binary logistic regression. The prevalence of balance impairment among patients with stroke was 48.1%. The reduction in power of knee flexors (OR = 0.858), knee extensors (OR = 0.880) and ankle dorsiflexors (OR = 0.820) was found to be significantly associated with balance impairment, along with speed (OR = 1.187 (95% CI = 1.100, 1.280)), depression (OR = 1.331 (95% CI = 1.055–1.679)) and activities of daily living (OR = 0.313 (95% CI = 0.150–0.650)). In summary, around half of the patients with stroke exhibited balance impairments, with females being more prone.

Employment in Nursing and Preterm Birth: Are They Linked?

PEDIATRICS ◽  
1996 ◽  
Vol 98 (6) ◽  
pp. 1197-1198
Author(s):  
JUDITH LUMLEY
Keyword(s):  
Preterm Birth ◽  
Working Conditions ◽  
Case Control Study ◽  
Case Control ◽  
Cross Sectional ◽  
Neonatal Nurses ◽  
Fetal Health ◽  
Mailed Survey ◽  
Control Study ◽  
Specialist Group

The possibility that employment itself, with all its rewards, both intrinsic and monetary, could be harmful to maternal and fetal health is always a matter for concern. When that suggestion is made about an archetypical female form of employment (nursing), and a specialist group devoted to the health care of women and infants, it is deeply alarming. So the recent publication which states, "our results show that strenuous working conditions are an important risk factor for preterm birth among US nurses," has been widely reported and discussed. The study was a case-control study with cases and controls drawn from respondents to a cross-sectional mailed survey of members of the Association of Women's Health, Obstetric and Neonatal Nurses.

scholarly journals Computer Vision Syndrome Prevalence and Ocular Sequelae among Medical Students: A University-Wide Study on a Marginalized Visual Security Issue

2021 ◽  
Vol 15 (1) ◽  
pp. 156-170
Author(s):  
Mohammed Iqbal ◽  
Hosam Elzembely ◽  
Ahmed Elmassry ◽  
Mervat Elgharieb ◽  
Ahmed Assaf ◽  
...  
Keyword(s):  
Computer Vision ◽  
Medical Students ◽  
Anterior Segment ◽  
Multivariate Logistic Regression Analysis ◽  
Risk Groups ◽  
Security Issue ◽  
Cross Sectional ◽  
Ophthalmic Examination ◽  
Frequent Use ◽  
Computer Vision Syndrome

Introduction: This study aimed to discover and document the potential of visual and ocular sequelae of computer vision syndrome (CVS) among medical students. Methods: This cross-sectional case-control study was conducted on medical students (n=4030) of five universities in Egypt. All students completed a specially designed and validated CVS questionnaire survey (CVS-F3). Students with ≥5 CVS symptoms constituted a risk group (n=352), while students with 1-4 CVS symptoms constituted a low-symptoms group (n=3067). Students from the control and risk groups were examined using objective methods, such as visual acuity, subjective refraction, dry eye disease tests, and anterior segment and fundus examinations. Students who complained of visual blur underwent multifocal electroretinography mfERG examinations (mfERG group). Results: The CVS-F3 indicated that 84.8% of students had complaints that might be related to CVS, however, our ophthalmic examination group revealed only a 56% CVS prevalence rate. The most common single screen type used by 70.4% of students was the smartphone, and the most common complaint was headache (50.2%). Multivariate logistic regression analysis revealed that CVS was significantly associated with increased screen-hours, including >2 screen-hours daily (odds ratio [OR], 2.48; P<0.0001), >2 screen-hours at night (OR, 1.79; P=0.003), and ≥3 screen-years (OR, 1.69; P=0.006). In the mfERG group, 37% demonstrated reduced amplitudes of mfERG rings and quadrants, indicating reduced foveal responses. Conclusion: CVS-questionnaires overestimate the true CVS prevalence and sequelae, which could be accurately detected by objective ophthalmic examination. Smartphones primarily caused CVS among students, with CVS severity increasing in correlation with shorter eye-to-screen distance and frequent use. Contact lens wearing doubled the risk of CVS development and augmented its severity. CVS might affect macular integrity with screen-induced foveal dysfunction. Clinical Trials Registration: PACTR201811618954630.

scholarly journals The correlation between dietary fat quality indices and lipid profile with Atherogenic Index of Plasma in obese and non-obese Volunteers: a cross-sectional descriptive-analytic case-control study

2020 ◽  
Author(s):  
Maryam sadat Mousavi javardi ◽  
Zahra Madani ◽  
Majid Karandish ◽  
Ariyo Movahedi ◽  
Behnood Abbasi
Keyword(s):  
Dietary Fat ◽  
Case Control Study ◽  
Saturated Fat ◽  
Case Control ◽  
Atherogenic Index ◽  
Quality Indices ◽  
Cross Sectional ◽  
Atherogenic Index Of Plasma ◽  
Fat Quality ◽  
Control Study

Abstract Background and aim: Abnormalities in lipid metabolism are commonly observed in patients who were obese. Alongside dyslipidemia, one of the markers in predicting the risk of cardiovascular disease is the Atherogenic Index of Plasma (AIP), which is related to dietary intake. Healthy fat quality indices, including Atherogenicity (AI) and Thrombogenicity (TI) hypo/hypercholesterolemic ratio (h/H), the Cholesterol-Saturated Fat Index (CSI) and ω-3/ω-6 ratio might have an effect on AIP. The purpose of this study is to find the possible relationship between dietary fat quality, and AIP and comparison of these indices among obese and non-obese volunteers.Methods: This study was a cross-sectional descriptive-analytic case-control study with 157 normal and overweight and obese volunteers (n=71 normal vs n=86 overweight and obese) in the age range of 18-65 years. Food intake, anthropometric indices, body composition, and lipid profile were measured. Results: Based on the present results, comparable biochemical parameters including TC (P=0.580), TG (P=0.362) and LDL (P=0.687) and HDL (P=0.151) among overweight/obese volunteers as compared to normal ones were noticed. Results of dietary fat quality, including Atherogenicity (AI) and Thrombogenicity (TI) hypo/hypercholesterolemic ratio (h/H), the Cholesterol-Saturated Fat Index (CSI) showed significantly higher AI (P=0.012) in the overweight/obese group as compared to the normal group. Whereas, h/H (P=0.034) and ω-6/ω-3 ratio (P=0.004) were significantly higher in normal weight volunteers. There was a positive correlation between AI, TI, CSI, SFA, MUFA, PUFA and ω-6/ω-3 ratio with AIP and negative correlation between h/H with AIP in both groups. Despite significancies of these corelations no strong relation was observed by doing multiple regression among normal and overweight/obese groups (R2=0.210, R2=0.387).Conclusions: In summary, the present study suggest a direct relationship between dietary fat quality, increased BMI, and lipid abnormalities with AIP. However, further large-scale studies are needed to have a clear conclusion in this regard.

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