Kelvin Kohar

Mr. Kelvin Kohar

University of Indonesia, Depok, Jawa Barat, Indonesia
orcid

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
8 August 2022 in Medicina
Verified
Journal Article
Open access
PDF file
HPHesti Platini
Hesti Platini
EFEric Ferdinand
Eric Ferdinand
KKKelvin Kohar
Kelvin Kohar
SPStephanie Amabella Prayogo
Stephanie Amabella Prayogo
SAShakira Amirah
Shakira Amirah
Sidik MaulanaSidik Maulana
Sidik Maulana
Background and Objectives: Advanced non-small-cell lung cancer (NSCLC) has led to a high number of mortalities. Immunotherapy, as a first-line treatment in advanced NSCLC, currently has no clarity regarding its prognostic markers to assess the treatment outcome. This systematic review aimed to evaluate neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) as prognostic markers in advanced NSCLC patients treated with immunotherapy. Materials and Methods: This systematic review was conducted using the PRISMA guidelines, starting from screening for relevant studies from several databases. Each included cohort study was further assessed by using the Newcastle–Ottawa Quality Assessment Scale, and the available data were extracted for qualitative and quantitative synthesis in pooled and subgroup analysis. Results: A total of 1719 patients were included in this meta-analysis. Hazard ratio (HR) outcomes for progression-free survival (PFS) and overall survival (OS) for NLR and PLR showed significant results, supporting NLR and PLR as prognostic markers (NLR: HR PFS 2.21 [95% CI: 1.50–3.24; p < 0.0001] and HR OS 2.68 [95% CI: 2.24–3.6; p < 0.0001]; PLR: HR PFS 1.57 [95% CI: 1.33–1.84; p < 0.00001] and HR OS 2.14 [95% CI: 1.72–2.67; p < 0.00001]). Subgroup analysis with a cut-off value of 5 for NLR and 200 for PLR also demonstrated notable outcomes. Higher NLR and PLR levels are associated with poor prognostic. Conclusions: There is considerable evidence regarding both markers as prognostic markers in NSCLC patients treated with immunotherapy. However, further studies with more homogeneous baseline characteristics are required to confirm these findings.

1 August 2023 in Journal of Multidisciplinary Healthcare
Verified
Journal Article
Open access
PDF file
LRLaili Rahayuwati
Laili Rahayuwati
Maria KomariahMaria Komariah
Maria Komariah
Citra Windani Mambang SariCitra Windani Mambang Sari
Citra Windani Mambang Sari
DYDesy Indra Yani
Desy Indra Yani
YHYanti Hermayanti
Yanti Hermayanti
KKKelvin Kohar
Kelvin Kohar
Introduction: It is widely acknowledged that the socioeconomic circumstances of a family income are correctly reflected in that family expenditures. The dietary habits of families are influenced by socioeconomic circumstances that may affect stunting. Therefore, this study aims to investigate the household economic predictor stunting (mother’s employment, family income, and family expenditure) in children under five. Methods: This study used a cross-sectional design. Six districts and cities have been chosen as study areas based on the areas with the highest incidence of stunting in West Java, Indonesia. This study conducted specifically from October to December 2018. Data were examined using descriptive statistics (frequency distribution) and a Spearman Rank bivariate test. A logistic regression was employed to determine the elements that serve as predictors of stunting. Results: A total of 731 women with children under five participated in the study. A bivariate analysis showed that mother’s employment had an association with stunting among children under five (p = 0.014). Meanwhile, family income and expenditure are not statistically significant associated with stunting (p > 0.05). A multivariate analysis showed that mother’s employment was a stunting predictor with odd ratio (OR) 1.810 (p = 0.017). The OR value means that mothers who do not work have a 1.810 chance for their children to experience stunting compared with mothers who have work. However, family income and expenditure have negative projected values (p = 0.580 and p = 0.398, respectively). Conclusion: Children under five who are stunted are potentially predictive with mothers’ employment, with a chance is higher in mother who do not work. However, family income and expenditure are not predictive of stunting.

28 September 2022 in Children
Verified
Journal Article
Open access
PDF file
IYIyus Yosep
Iyus Yosep
SPStephanie Amabella Prayogo
Stephanie Amabella Prayogo
KKKelvin Kohar
Kelvin Kohar
HAHubert Andrew
Hubert Andrew
AMAi Mardhiyah
Ai Mardhiyah
Sidik MaulanaSidik Maulana
Sidik Maulana
ASD is a neurodevelopmental disorder that is primarily treated with psychosocial intervention. However, it is costly and requires extensive resources to be effective. This inaccessibility is also further worsened by the ongoing COVID-19 pandemic, making the shift to a digital approach a sensible option. Among the available ASD therapies, parent-mediated interventions (PMIs) have a broad application and lower implementation cost. Hence, this systematic review aims to evaluate the potential that telehealth-based PMI holds and explore its feasibility throughout the COVID-19 pandemic. To build up this study, a systematic search through PubMed, Scopus, ProQuest, Wiley, and Cochrane was performed until 14 January 2021. Using the preferred Reporting Items for Systematic Review and Meta-Analysis guidelines, we ultimately included six studies in the review. Each study was evaluated utilizing the Cochrane Risk of Bias (ROB)-2 tool. Generally, parents’ outcomes (knowledge, satisfaction, and compliance) were higher in intervention group (E-learning) compared to control (standard treatment or wait-list). Children also showed some improvements in social skill, communication skill, and intelligence after receiving the treatment. In addition, coaching or therapist sessions were found to be crucial as adjuvant to support parents during the intervention. In conclusion, internet-based parent-mediated interventions are promising and recommended for managing ASD patients, in the face of pandemic. However, more variety in study locations is also needed, particularly in low- and middle-income countries, to tackle the knowledge and clinical application gap. Further research should be conducted with a uniform measurement tool to achieve the same perception and reliable pooled analysis.

21 September 2022 in Medicina
Verified
Journal Article
Open access
PDF file
Sidik MaulanaSidik Maulana
Sidik Maulana
YTYanny Trisyani
Yanny Trisyani
RMRistina Mirwanti
Ristina Mirwanti
SAShakira Amirah
Shakira Amirah
KKKelvin Kohar
Kelvin Kohar
ENEvi Novianti
Evi Novianti
Background and objective: Patients with heart failure are a high-risk group who may have a higher mortality rate if infected during the COVID-19 pandemic. The problem of a patient’s non-adherence to cardiac rehabilitation programs is still a challenge, resulting in disappointing long-term benefits of cardiac rehabilitation. Telehealth, including telerehabilitation, has grown in popularity to improve access to quality healthcare. It is more valuable and safer compared to usual rehabilitation care, especially during the current COVID-19 pandemic, to cut down unnecessary hospital visits and reduce the risk of cluster infections. This study aims to identify the efficacy of relevant randomized control trials (RCTs) using telerehabilitation in managing heart failure. The model, delivery care, safety, and efficacy were assessed. Material and Methods: This study was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-analysis for Scoping Reviews (PRISMA-ScR). The authors included relevant records published in the last ten years from three databases: PubMed/MEDLINE, ProQuest, and EBSCO. Each included study was further assessed using Cochrane’s Risk of Bias (Rob 2) tool. Results: The telerehabilitation models consisted of cellphones, instant messaging, or online videoconferencing software. Some also included tool sets to monitor patients’ vital signs regularly or during exercise. Most patients adhered to and completed all provided programs. Cardiac telerehabilitation successfully improved patients’ physical fitness, quality of life, and mental health. No major adverse outcomes or significant complications were associated with the program. Conclusion: Cardiac telerehabilitation has the potential to deliver rehabilitation for heart failure patients, evidenced by its feasibility, efficacy, and safety. As a future perspective, this delivery care type can be applied throughout transmissible disease outbreaks or even globally.

9 October 2022 in Sustainability
Verified
Journal Article
Open access
PDF file
KKKurniawan Kurniawan
Kurniawan Kurniawan
IYIyus Yosep
Iyus Yosep
Sidik MaulanaSidik Maulana
Sidik Maulana
AMAep Maulid Mulyana
Aep Maulid Mulyana
SAShakira Amirah
Shakira Amirah
LRLaili Rahayuwati
Laili Rahayuwati
COVID-19 has caused widespread psychological suffering. Anxiety is one of the several psychological disorders that are escalating globally, yet social distance constraints restrict in-person mental health therapy. Anxiety and other psychological disorders whose treatments are limited due to social distancing continue to grow, so there is an increasing need to use mental healthcare that can be offered remotely, especially in the pandemic era. This study aimed to conduct a systematic review and meta-analysis of the efficacy of online-based interventions for anxiety during COVID-19. This study followed the Preferred Reporting Item for Systematic Review and Meta-analysis (PRISMA). We collected data from three databases, namely PubMed, CINAHL, and Oxford Library Press, published in 2020–2022. Additionally, we collected data using the snowball technique. This meta-analysis analyzed the pooled mean difference (MD) and its p-value using random-effects models. Critical appraisal and risk of bias were assessed using Cochrane Risk of Bias (Rob) 2. We retrieved 34 RCTs for systematic review and 14 RCTs for meta-analysis, yielding 9159 participants for general anxiety disorder (GAD-7) measurement and 1303 participants for depression anxiety stress scale (DASS-21) measurement. This study shows that online-based interventions significantly reduce GAD-7 score (a pooled MD of 1.30; 95% CI: 2.83–4.65; p = 0.00001) and insignificantly reduce DASS-21 (0.05; 95% CI: −2.63–2.72; p = 0.97) according to pre- and post-test in intervention group. Additionally, there is a significant difference between the intervention and control groups, where the intervention group performed statistically progressively better than the controls (−7.26; 95% CI: −11.58–−2.95; p = 0.001) (−2.08; 95% CI: −6.71–2.55; p = 0.001). Online-based interventions have proved effective for reducing general anxiety during the COVID-19 pandemic. Consequently, this meta-analysis can be adapted as a model for mental health services in the new normal.

9 May 2024 in Acta Cardiologica
Verified
Journal Article
Closed access
KKKelvin Kohar
Kelvin Kohar
ISIndira Saraswati Sanjaya
Indira Saraswati Sanjaya
SAShakira Amirah
Shakira Amirah
DYDefin Allevia Yumnanisha
Defin Allevia Yumnanisha
AAAde Meidian Ambari
Ade Meidian Ambari
Despite percutaneous coronary intervention is the current preferred reperfusion modality, the incidence of major adverse cardiovascular events (MACE) is still high. Currently, GRACE score is used for predicting PCI outcomes. The TyG (triglyceride-glucose) index, a potential predictor based on insulin resistance of cardiovascular disease, has not been considered in the GRACE score. To assess the potential of the TyG index in predicting cardiovascular adverse clinical outcomes in patients undergoing PCI. Following PRISMA guidelines, the authors reviewed literature from five databases. We included studies investigating post-PCI outcomes based on the TyG index level. Effect size was estimated using RevMan to calculate pooled odds ratio and mean difference, and R software to perform diagnostic test accuracy. Overall, 31,671 post-PCI patients with acute coronary syndrome were included in this study. A significant difference in TyG index was found between patients who experienced MACE and those who did not [MD: 0.3 (0.2-0.4), p < .05]. Higher TyG index was strongly correlated with higher MACE [OR: 2.01 (1.45-2.77), p < .05], especially revascularization [OR: 2.40 (1.72-3.36), p < .05], followed by myocardial infarction [OR: 1.80 (2.41-2.86), p < .05], death [OR: 1.36 (0.86-2.15), p = .19], and stroke [OR: 1.09 (0.79-1.50), p = .59]. Tyg Index showed 55% sensitivity, 60% specificity, and 0.612 accuracy. The addition of the TyG index to the GRACE scoring improved the predictive model's AUC (0.746 vs. 0.809). This systematic review and meta-analysis comprises evidence-based results for the correlation of TyG index and post-PCI outcomes, demonstrating modest sensitivity, specificity, accuracy, and enhanced predictive value of GRACE score.