Tag: statistics
Hum Vaccin Immunother. 2022 Jun 15:1-10. doi: 10.1080/21645515.2022.2066424. Online ahead of print.
ABSTRACT
Sublingual immunotherapy (SLIT) is a well-tolerated, safe, and effective approach to treating allergic rhinitis (AR). Oralair® is a five-grass pollen SLIT tablet containing natural pollen allergens from five of the major grass species responsible for seasonal AR due to grass pollen allergy. Recommended use is in a pre-coseasonal regimen, starting daily treatment approximately 4 months before the start of the pollen season, with treatment then continued daily throughout the season; treatment should continue for 3-5 y. Clinical efficacy and safety of Oralair® in patients with grass pollen-induced AR has been demonstrated in a comprehensive clinical development program of randomized controlled trials. Effectiveness has been substantiated in subsequent observational studies with sustained efficacy following treatment cessation and a favorable level of adherence, quality of life, benefit, and satisfaction for the patients. Supportive evidence for a benefit in reducing the risk or delaying the development of allergic asthma is emerging.
PMID:35704772 | DOI:10.1080/21645515.2022.2066424
Clin Lab. 2022 Jun 1;68(6). doi: 10.7754/Clin.Lab.2021.210821.
ABSTRACT
BACKGROUND: Leukemia stem cells (LSCs) have been demonstrated to be more therapy-resistant than leukemic blast cells reflecting measurable residual disease (MRD). CD34+CD38- cell frequency is an independent factor for relapse prediction and could therefore be used in the future to improve MRD assessment in acute myeloid leukemia (AML). This protocol is designed to enable accurate and reproducible immunophenotypic detection of measurable residual stem cell disease necessary for proper therapeutic decision and report their prognostic value in AML patients.
METHODS: Fifty-four Novo AML adult patients diagnosed in the onco-hematology service of the “20 August 1953” Hospital in Casablanca. We analyzed phenotype and frequency of CD45dim CD34+CD38- cells in bone marrow samples from patients with AML and non-myeloid malignancies using six-color flow cytometry and a simple one-tube essay.
RESULTS: For evaluation of leukemic stem cells, our gate strategy was based on the selection of CD34+CD38 – stem cells and leukemia associated immunophenotype approach. Positivity of CD123 or/and aberrant expression of primitive markers CD117 and HLA DR on stem cells discriminate leukemia stem cells from normal hematopoietic stem cells. We reported a statistically significant difference between expressions of primitive markers (CD117 and HLA DR) on leukemic stem cells. In addition, the frequency of LSCs after complete remission in post-induction was persistent in 50% of AML patients.
CONCLUSIONS: Overall, we show that CD34+CD38-CD123+ as a basic phenotype, with aberrant phenotype detection of HLA DR and CD117 markers on stem cells, contributes to detecting LSCs which indicates the poor prognosis.
PMID:35704721 | DOI:10.7754/Clin.Lab.2021.210821
Clin Lab. 2022 Jun 1;68(6). doi: 10.7754/Clin.Lab.2021.210853.
ABSTRACT
BACKGROUND: Nowadays, novel antimicrobial strategies are being developed which focus on debilitating, rather than killing the microorganisms. In this regard, anti-biofilm therapy is one of the important ways to combat bacterial infections. Therefore, the aim of the current study was to evaluate the anti-biofilm activity of Carvacrol against E. faecalis by means of its effects on biofilm formation as well as on the gene expression levels of the two biofilm related genes, Epa and Esp.
METHODS: A total of 40 clinical strains of E. faecalis were collected from three hospitals in Tehran, Iran during 2020. These isolates were confirmed by biochemical and genotypic methods. Antibacterial and anti-biofilm activity of Carvacrol essence were determined according the standard protocol. Finally, expression level of the biofilm related genes (Epa and Esp) were evaluated before and after the treatment with Carvacrol.
RESULTS: A total of 14 isolates were considered as strong biofilm producers and were used for analysis. Carvacrol essence showed the best antibacterial activity at 2,500 μg/mL concentration against all the isolates, the biofilm formation capacity was decreased by Carvacrol essence, and it was statistically significant (p < 0.05). Expression levels of the Esp gene were decreased in 5 isolates while increased in 3 isolates following the Carvacrol treatment. Ex-pression levels of the EpaI gene was significantly decreased (p < 0.05) in 4 isolates following the Carvacrol treatment.
CONCLUSIONS: In conclusion, the results presented in this study suggest that carvacrol extract exhibits significant antimicrobial and anti-biofilm properties against E. faecalis, even against vancomycin resistant isolates.
PMID:35704732 | DOI:10.7754/Clin.Lab.2021.210853
J Clin Psychiatry. 2022 Jun 13;83(4):21m14055. doi: 10.4088/JCP.21m14055.
ABSTRACT
Objective: To examine the incidence and predictors of suicide attempts and deaths in the year after psychiatric hospitalization.
Methods: A population-based dataset was used to develop a cohort of individuals 18 years or older admitted with a mental disorder (defined by ICD-10 codes) from 2005 to 2016 (n = 26,975) in Manitoba, Canada. Using Cox regression, hazard ratios were calculated for each covariate among those who attempted and died by suicide in the year following hospitalization, while adjusting for confounders.
Results: In the year following hospitalization for a mental disorder, 0.7% of the individuals died by suicide and 3.5% attempted suicide. Statistically significant risk factors for suicide in the year after discharge from psychiatric hospitalization included male sex (hazard ratio [HR], 1.47; 95% confidence interval [CI], 1.10-1.97) and urban location (HR, 1.37; 95% CI, 1.02-1.85) and for attempting suicide included female sex (HR, 0.63; 95% CI, 0.55-0.72), living rurally (HR, 0.66; 95% CI, 0.58-0.75), a previous mental disorder (HR, 1.63; 95% CI, 1.38-1.92), justice involvement (HR, 1.48; 95% CI, 1.28-1.70), and being on income assistance (HR, 1.17; 95% CI, 1.01-1.35) (P < .05 for all). Age (HR, 0.99; 95% CI, 0.99-0.99) (P < .05) was associated with a reduced rate of suicide attempts.
Conclusions: Further research into interventions to address the identified risk factors for suicide in the recently discharged population is critical to improve management.
PMID:35704710 | DOI:10.4088/JCP.21m14055
PLoS Negl Trop Dis. 2022 Jun 15;16(6):e0010390. doi: 10.1371/journal.pntd.0010390. Online ahead of print.
ABSTRACT
BACKGROUND: Leishmaniases are neglected tropical diseases that inflict great burden to poor areas of the globe. Intense research has aimed to identify parasite genetic signatures predictive of infection outcomes. Consistency of diagnostic tools based on these markers would greatly benefit from accurate understanding of Leishmania spp. population genetics. We explored two chromosomal loci to characterize a population of L. braziliensis causing human disease in Northeast Brazil.
METHODOLOGY/PRINCIPAL FINDINGS: Two temporally distinct samples of L. braziliensis were obtained from patients attending the leishmaniasis clinic at the village of Corte de Pedra: (2008-2011) primary sample, N = 120; (1999-2001) validation sample, N = 35. Parasites were genotyped by Sanger’s sequencing of two 600 base pairs loci starting at nucleotide positions 3,074 and 425,451 of chromosomes 24 and 28, respectively. Genotypes based on haplotypes of biallelic positions in each locus were tested for several population genetic parameters as well as for geographic clustering within the region. Ample geographic overlap of genotypes at the two loci was observed as indicated by non-significant Cusick and Edward’s comparisons. No linkage disequilibrium was detected among combinations of haplotypes for both parasite samples. Homozygous and heterozygous genotypes displayed Hardy-Weinberg equilibrium (HWE) at both loci in the two samples when straight observed and expected counts were compared by Chi-square (p>0.5). However, Bayesian statistics using one million Monte-Carlo randomizations disclosed a less robust HWE for chromosome 24 genotypes, particularly in the primary sample (p = 0.04). Fixation indices (Fst) were consistently lower than 0.05 among individuals of the two samples at both tested loci, and no intra-populational structuralization could be detected using STRUCTURE software.
CONCLUSIONS/SIGNIFICANCE: These findings suggest that L. braziliensis can maintain stable populations in foci of human leishmaniasis and are capable of robust genetic recombination possibly due to events of sexual reproduction during the parasite’s lifecycle.
PMID:35704664 | DOI:10.1371/journal.pntd.0010390
J Osteopath Med. 2022 Jun 15. doi: 10.1515/jom-2022-0027. Online ahead of print.
ABSTRACT
CONTEXT: Evidence-based medicine (EBM) is the application of scientific evidence while treating a patient. To date, however, there is very little evidence describing how residents in emergency medicine understand and incorporate EBM into practice.
OBJECTIVES: The aim of this study was to determine EBM theoretical and quantitative knowledge in emergency medicine residents in community hospital-based training programs.
METHODS: A sample of emergency medicine residents from nine hospitals was enrolled to complete a cross-sectional assessment of EBM skills from April 2021 through June 2021. Performance on the Fresno Test of Evidence-Based Medicine (FTEBM) was assessed utilizing descriptive statistics, t tests, and one-way analysis of variance.
RESULTS: A total of 50.8% (124/244) of current emergency medicine residents completed the FTEBM during the study period. No significant difference on FTEBM scores was noted between the different types of medical degrees (DO vs. MD) (p=0.511), holding an advanced research degree (p=0.117), or between each postgraduate year of training (p=0.356). The mean score of those residents who rated their knowledge of EBM as average or higher was 36.0% (32.8-39.1%). The mean score of those residents who rated their programs as having an “average” or higher institutional focus on EBM was 34.9% (32.2-37.6%).
CONCLUSIONS: Participating emergency medicine residents show an incomplete understanding of EBM both in theory and applied computations despite rating themselves as having an average understanding. Emergency medicine residencies would be well suited to implement a standardized EBM curriculum that focuses on longitudinal reinforcement of key concepts needed for the practicing physician.
PMID:35704661 | DOI:10.1515/jom-2022-0027
PLoS One. 2022 Jun 15;17(6):e0269359. doi: 10.1371/journal.pone.0269359. eCollection 2022.
ABSTRACT
Oral health is a critical component of human health but is sometimes forgotten, particularly during humanitarian crises. This research aimed to ascertain the state of oral health among Rohingya refugees living in one of the largest refugee camps and evaluate their knowledge and practice of oral health. A multicenter cross-sectional survey was conducted among 477 participants from July to September 2021 using a structured questionnaire. There were 34 Rohingya camps and out of those 14 camps were accessible for data collection. The study participants were between 18-82 years residing in the refugee camps under Cox’s Bazar. The majority of participants (53.88%) were female and between the ages of 25 and 45. Around 46.12% of respondents did not have basic oral health knowledge, while 53.67% were in need of dental care. Nearly half of the participants demonstrated poor oral health practices. Participants’ age and educational level were positively associated with oral health knowledge (p = 0.02 and p<0.001). Furthermore, the knowledge level was positively associated with oral health practice (p = .025). Participants with a history of teeth pain and discomfort in the last 12 months were ten times more likely to seek treatment (OR = 9.93, CI: 5.591-17.64). The study indicated a growing demand for dental care among Rohingya refugees staying in Bangladesh. To reduce the severity of oral health issues, use of minimally invasive restorative procedures can be suggested in camps. New oral health promotion campaigns should be emphasized and proper education, ideally in their original language, can be beneficial.
PMID:35704660 | DOI:10.1371/journal.pone.0269359
PLoS Comput Biol. 2022 Jun 15;18(6):e1009486. doi: 10.1371/journal.pcbi.1009486. Online ahead of print.
ABSTRACT
The tumor microenvironment (TME), which characterizes the tumor and its surroundings, plays a critical role in understanding cancer development and progression. Recent advances in imaging techniques enable researchers to study spatial structure of the TME at a single-cell level. Investigating spatial patterns and interactions of cell subtypes within the TME provides useful insights into how cells with different biological purposes behave, which may consequentially impact a subject’s clinical outcomes. We utilize a class of well-known spatial summary statistics, the K-function and its variants, to explore inter-cell dependence as a function of distances between cells. Using techniques from functional data analysis, we introduce an approach to model the association between these summary spatial functions and subject-level outcomes, while controlling for other clinical scalar predictors such as age and disease stage. In particular, we leverage the additive functional Cox regression model (AFCM) to study the nonlinear impact of spatial interaction between tumor and stromal cells on overall survival in patients with non-small cell lung cancer, using multiplex immunohistochemistry (mIHC) data. The applicability of our approach is further validated using a publicly available multiplexed ion beam imaging (MIBI) triple-negative breast cancer dataset.
PMID:35704658 | DOI:10.1371/journal.pcbi.1009486
PLoS One. 2022 Jun 15;17(6):e0268441. doi: 10.1371/journal.pone.0268441. eCollection 2022.
ABSTRACT
BACKGROUND: Trachoma is the leading infectious disease that leads to blindness worldwide, especially in developing countries. Though Ethiopia had targeted a trachoma elimination program by 2020, the problem worsens, particularly in the Amhara Region. Even though sustained intervention measures are undertaken across the region, it is unclear why trachoma is still a significant public health problem. So, this study assessed the prevalence of active trachoma and associated factors among 1-9 years of age children from model and non-model kebeles in Dangila district Amhara Region, Northwest Ethiopia.
METHODS: A community-based comparative cross-sectional study was conducted from 20th September 2019 to 29th October 2019. A multistage stratified random sampling technique was used to reach 704 children from model and non-model kebeles. Samples were allocated proportionally to model and non-model kebeles. A structured and pretested data collection tool and observational checklist was used to manage the necessary data. Data were coded and entered in Epidata version 4.6, and further analysis was done using SPSS version 20 software. Bivariable and multivariable logistic regression analysis was employed to identify factors associated with active trachoma. Adjusted Odds Ratios (AOR), p-value, and respected Confidence Interval (CI) were used to report the findings.
RESULTS: Seven hundred four children were included in this study, with a response rate of 97.8%. The overall prevalence of active trachoma was 6% (95% CI: 4.5, 8.1). The prevalence of active trachoma among non-model and model Kebele was not significantly different. Still, the prevalence of active trachoma among children from model Kebele were [4.5%, (95% CI: 2.4%, 7.1%)] relatively lower compared with non-model kebeles, [7.6%, 95% CI: (4.9%, 10.9%)]. Moreover, not using latrine (AOR = 4.29, 95% CI: 1.96, 9.34), fly-eye contact (AOR = 2.59, 95% CI: 1.11, 6.03), presence of sleep in eyes (AOR = 2.46, 95% CI: 1.10, 5.47), presence of ocular discharge (AOR = 2.79, 95% CI: 1.30, 6.00), presence of nasal discharges (AOR = 2.67, 95% CI: 1.21, 5.90) and washing faces with soap (AOR = 0.22, 95% CI: 0.07, 0.69) were found significantly associated with the prevalence of active trachoma among children 1-9 years old.
CONCLUSIONS: The prevalence of active trachoma in the model and non-model kebeles was high and did not show a statistical difference. Attention to be given to latrine utilization, washing face with soap, and other personal hygiene activities.
PMID:35704657 | DOI:10.1371/journal.pone.0268441