Publications by authors named "Khachatryan N"

Background: Linezolid is included in most of the regimens for treatment of rifampicin-resistant tuberculosis. The prior publications presented the safety profile and clinical effectiveness of linezolid.

Objectives: The research objectives of this study include: description of cumulative incidence rates of linezolid-induced adverse events, assessment of associations of those events with different variables, evaluation of the adverse event management and impacts of the unfavorable events on the effectiveness of treatment for rifampicin-resistant tuberculosis.

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Purpose: Chronic anterior uveitis (CAU) often requires suppressive therapy, which has potential side effects including cataract, ocular hypertension, and increased risk of infection. No remittive therapy is currently available; however, several studies have demonstrated an association between low 25-hydroxy Vitamin D (25OHD) levels and either uveitis incidence or uveitis disease activity. This study investigates the potential of Vitamin D supplementation as a remittive treatment for CAU.

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Article Synopsis
  • Scientists did a big survey with over 59,000 people from 63 countries to understand how people think about climate change!
  • They tested different ways to encourage people to believe in climate change and support actions to help the environment!
  • The study includes lots of information and data that can help others learn more about what influences people's actions on climate change around the world!
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A theoretical perspective on grandiose narcissism suggests four forms of it (sanctity, admiration, heroism, rivalry) and states that these forms conduce to different ways of thinking and acting. Guided by this perspective, we examined in a multinational and multicultural study (61 countries; N = 15,039) how narcissism forms are linked to cognitions and behaviors prompted by the COVID-19 pandemic. As expected, differences in cognitions and behaviors across narcissism forms emerged.

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In 2022, the WHO European Region accounted for 15.1% of all incident rifampicin-resistant/multidrug-resistant TB (RR/MDR-TB) cases. Most occurred in 18 high-priority countries of eastern Europe and central Asia, many of which joined an initiative led by the WHO Regional Office for Europe.

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Background: In 2020, WHO guidelines prioritised the use of a standard fully oral short treatment regimen (STR) consisting of bedaquiline, levofloxacin or moxifloxacin, ethionamide, ethambutol, high-dose isoniazid, pyrazinamide, and clofazimine for the management of rifampicin-resistant tuberculosis. A high prevalence of resistance to constituent drugs precluded its widespread use by countries in the WHO European region. We evaluated three 9-month fully oral modified STRs (mSTRs) in which ethionamide, ethambutol, isoniazid, and pyrazinamide were replaced by linezolid, cycloserine, or delamanid (or a combination).

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Background: The implementation of modified, all-oral shorter regimens for treatment of rifampicin-resistant tuberculosis has started in Armenia since August 2020 under the conditions of operational research.

Objective: This study aims to evaluate the safety and effectiveness of shorter regimens.

Methods: We evaluated cumulative incidence rates of serious adverse events, adverse events of grade 3 and greater and events resulting in treatment modifications or suspension for 52 study participants.

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When someone violates a social norm, others may think that some sanction would be appropriate. We examine how the experience of emotions like anger and disgust relate to the judged appropriateness of sanctions, in a pre-registered analysis of data from a large-scale study in 56 societies. Across the world, we find that individuals who experience anger and disgust over a norm violation are more likely to endorse confrontation, ostracism and, to a smaller extent, gossip.

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The emergence of COVID-19 dramatically changed social behavior across societies and contexts. Here we study whether social norms also changed. Specifically, we study this question for cultural tightness (the degree to which societies generally have strong norms), specific social norms (e.

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Article Synopsis
  • Effective global behavior change is crucial for reducing climate change, but it's unclear which strategies motivate people to shift their beliefs and actions.
  • A study tested 11 interventions on nearly 60,000 participants across 63 countries, finding small effectiveness primarily among non-skeptics and varied results across different outcomes.
  • Key results showed that reducing psychological distance strengthened beliefs, writing a letter to a future generation increased policy support, and inducing negative emotions encouraged information sharing, but no strategy successfully boosted tree-planting efforts.
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Primary open-angle glaucoma (POAG), the leading cause of irreversible blindness worldwide, disproportionately affects individuals of African ancestry. We conducted a genome-wide association study (GWAS) for POAG in 11,275 individuals of African ancestry (6,003 cases; 5,272 controls). We detected 46 risk loci associated with POAG at genome-wide significance.

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Purpose: This study assessed the prevalence of cataract blindness, cataract surgical coverage (CSC), effective CSC, visual outcome after cataract surgery, and barriers to cataract surgery in a population aged 50 years and older in Armenia using Rapid Assessment of Avoidable Blindness (RAAB) methodology.

Methods: The study sample included 2258 individuals aged 50 years and older who were randomly selected from 11 provinces of Armenia in 2019 following the RAAB methodology. The study team randomly selected 50 clusters, 50 people in each.

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  • The study aimed to analyze the relationship between immunosuppression and overall as well as cancer-specific mortality in patients with noninfectious ocular inflammatory disease.
  • Researchers examined data from over 15,000 patients over a median of 10 years and found there were 1970 deaths, with 435 attributed to cancer.
  • The results indicated that patients on various immunosuppressants experienced similar mortality rates compared to the general U.S. population, suggesting that these treatments did not significantly increase overall or cancer mortality risk.
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Purpose: This study aimed to estimate the prevalence and main causes of blindness and visual impairment in population aged 50 years and older in Armenia using Rapid Assessment of Avoidable Blindness (RAAB) methodology.

Methods: The study team randomly selected 50 clusters (each consisting of 50 people) from all 11 regions of Armenia. Data on participants' demographics, presenting visual acuity, pinhole visual acuity, principal cause of presenting visual acuity, spectacle coverage, uncorrected refractive error (URE), and presbyopia were collected using the RAAB survey form.

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The WHO provides standardized outcome definitions for rifampicin-resistant (RR) and multidrug-resistant (MDR) TB. However, operationalizing these definitions can be challenging in some clinical settings, and incorrect classification may generate bias in reporting and research. Outcomes calculated by algorithms can increase standardization and be adapted to suit the research question.

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While several prior studies have examined the prevalence and predictors of recidivism among juvenile homicide offenders (JHOs), much less scholarly attention has been devoted to exploring the post-release factors that influence JHOs to desist from criminal behavior. Given relatively recent rulings by the U.S.

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It is crucial to understand why people comply with measures to contain viruses and their effects during pandemics. We provide evidence from 35 countries (N = 12,553) from 6 continents during the COVID-19 pandemic (between 2021 and 2022) obtained via cross-sectional surveys that the social perception of key protagonists on two basic dimensions-warmth and competence-plays a crucial role in shaping pandemic-related behaviors. Firstly, when asked in an open question format, heads of state, physicians, and protest movements were universally identified as key protagonists across countries.

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Introduction: To promote judicious prescribing of methicillin-resistant Staphylococcus aureus (MRSA)-active therapy for skin and soft tissue infections (SSTI), we previously developed an MRSA risk assessment tool. The objective of this study was to validate this risk assessment tool internationally.

Methods: A multicenter, prospective cohort study of adults with purulent SSTI was performed at seven international sites from July 2016 to March 2018.

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Background: Direct-acting antivirals (DAAs) are not widely used for patients with chronic hepatitis C virus (HCV) infection and multidrug- or rifampicin-resistant TB (MDR/RR-TB). We describe the implementation aspects of a new integrated model of care in Armenia and the perceptions of the healthcare staff and patients.

Methods: We used qualitative methods, including a desktop review and semi-structured individual interviews with healthcare staff and with patients receiving HCV and MDR/RR-TB treatment.

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The home environment is a particularly significant part of life that is supposed to satisfy inhabitants' needs, form their identity, and contribute to psychological wellbeing. The construct of home attachment is especially relevant for students as a most mobile social group. This study is devoted to the validation of in a student sample from five countries (Armenia, India, Indonesia, Russia, and Ukraine).

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Coronavirus disease (COVID-19) has been a source of fear around the world. We asked whether the measurement of this fear is trustworthy and comparable across countries. In particular, we explored the measurement invariance and cross-cultural replicability of the widely used Fear of COVID-19 scale (FCV-19S), testing community samples from 48 countries (N = 14,558).

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Article Synopsis
  • The study aimed to estimate the incidence of corneal endothelial transplantation (CET) and identify risk factors in patients with noninfectious ocular inflammation using data from a cohort study of adult patients in the U.S.
  • A total of 14,264 eyes were analyzed, revealing a 10-year incidence rate of 1.10% for CET, with notable risk factors including older age (over 60), specific types of inflammation (anterior uveitis and scleritis), and prior operations like cataract and tube shunt surgery.
  • The findings suggest that while CET is rare among these patients, certain conditions like hypotony and band keratopathy significantly increase the likelihood of requiring the procedure.
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Given recent U.S. Supreme Court rulings regarding the constitutionality of juveniles who received mandated life sentences, questions have arisen in the field of criminology regarding how these offenders will adjust if someday released.

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