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Nevin Manimala Statistics

Computer game may help to predict reuse of opioids

A computer betting game can help predict the likelihood that someone recovering from opioid addiction will reuse the pain-relieving drugs, a new study shows.
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Nevin Manimala Statistics

Smaller class sizes not always better for pupils, multinational study shows

A new statistical analysis of data from a long-term study on the teaching of mathematics and science has found that smaller class sizes are not always associated with better pupil performance and achievement.
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Nevin Manimala Statistics

An algorithm for large-scale genomic analysis

The examination of Haplotypes makes it possible to understand the heritability of certain complex traits. However, genome analysis of family members is usually necessary, a tedious and expensive process. Researchers have developed SHAPEIT4, a powerful computer algorithm that allows the haplotypes of hundreds of thousands of unrelated individuals to be identified very quickly. Results are as detailed as when family analysis is performed. Their tool is available online under an open source license.
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Nevin Manimala Statistics

Mathematicians put famous Battle of Britain ‘what if’ scenarios to the test

Mathematicians have developed a new model to explore what the impact of changes to Luftwaffe tactics would actually have been. Their approach uses statistical modelling to calculate how the Battle might have played out if history had followed one of several alternative courses.
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Nevin Manimala Statistics

statistics; +434 new citations

434 new pubmed citations were retrieved for your search.
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statistics

These pubmed results were generated on 2020/04/16

PubMed comprises more than millions of citations for biomedical literature from MEDLINE, life science journals, and online books.
Citations may include links to full-text content from PubMed Central and publisher web sites.

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Nevin Manimala Statistics

statistics; +312 new citations

312 new pubmed citations were retrieved for your search.
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statistics

These pubmed results were generated on 2020/04/15

PubMed comprises more than millions of citations for biomedical literature from MEDLINE, life science journals, and online books.
Citations may include links to full-text content from PubMed Central and publisher web sites.

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Nevin Manimala Statistics

Fracture Toughness Comparison of Three Indirect Composite Resins Using 4-Point Flexural Strength Method.

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Fracture Toughness Comparison of Three Indirect Composite Resins Using 4-Point Flexural Strength Method.

Eur J Dent. 2020 Apr 13;:

Authors: Moradi Z, Abbasi M, Khalesi R, Tabatabaei MH, Shahidi Z

Abstract
OBJECTIVES:  The advantages of indirect composite restorations such as less crack formation during their computer-aided design/computer-aided manufacturing process, compared with ceramic restorations, have resulted in their growing popularity. However, restoration failure is a major concern with regard to the long-term clinical success of restorations and may occur as the result of propagation of a crack originated from an internal flaw in the restoration. This study aimed to compare the fracture toughness of three indirect composite resins.
MATERIALS AND METHODS: In this in vitro experimental study, 10 specimens measuring 3 × 3 × 18 mm were fabricated of Gradia, Crios, and high impact polymer composite indirect composites. A single edge notch with a diameter < 0.3 mm and 0.3 mm length was created in the 9 mm longitudinal dimension of specimens using a no. 11 surgical scalpel. The specimens were then subjected to 4-point flexural strength test in a universal testing machine with a crosshead speed of 0.1 mm/s until failure.
STATISTICAL ANALYSIS:  Data were analyzed using IBM SPSS Statistics via one-way analysis of variance (ANOVA) and Tukey’s HSD (honestly significant difference) test. The statistical power was set at p ˂ 0.05.
RESULTS:  One-way ANOVA showed a significant difference in fracture toughness of the three composite groups (p = 0.000). According to the Tukey HSD analysis, the fracture toughness of HIPC was significantly higher than that of the other two composites. The fracture toughness of Gradia was significantly lower among all.
CONCLUSIONS:  Within the limitations of this study, the results showed that high temperature-pressure polymerization can increase resistance to crack propagation and subsequently improve the clinical service of indirect composite restorations. Although we do not know the filler volume percentage of HIPC, it seems that filler volume percentage of the composite is inversely correlated with fracture toughness.

PMID: 32283561 [PubMed – as supplied by publisher]

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Update of the BEVQ-15, a beverage intake questionnaire for habitual beverage intake for adults: determining comparative validity and reproducibility.

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Update of the BEVQ-15, a beverage intake questionnaire for habitual beverage intake for adults: determining comparative validity and reproducibility.

J Hum Nutr Diet. 2020 Apr 13;:

Authors: Fausnacht AG, Myers EA, Hess EL, Davy BM, Hedrick VE

Abstract
INTRODUCTION: The BEVQ-15 is a beverage intake questionnaire that estimates the habitual average daily intake of 15 beverage categories (kcal and fl oz), as well as total sugar-sweetened beverages (SSB) and total beverages. However, subsequent to its initial validation in 2010, it has not been updated. The present study aimed to assess the convergent validity and reproducibility of the updated form of the BEVQ-15 to better reflect current beverage consumption trends.
METHODS: The study population included adults (n = 50) aged ≥18 years, recruited from a local university community. Participation consisted of three laboratory visits within a 4-week period in which the updated BEVQ-15 was administered during the first and last visit and four 24-h dietary recalls were collected. BEVQ-15 modifications included removing limits of 60 fl oz per beverage, adding a nut milk category, and providing creamer and sweetener preferences for coffee/tea categories. Convergent validity was assessed by comparing reported beverage intake between the BEVQ-15 and dietary recalls. Reproducibility was assessed by comparing both BEVQ-15 administrations. Analyses included descriptive statistics, Wilcoxon signed rank tests, Bland-Altman plots and Spearman’s correlations.
RESULTS: For validity, Bland-Altman plot agreement between the BEVQ-15 and recalls was in the range 92-96% for total SSB and total beverage intake. For reproducibility, all beverage categories, total SSB, and total beverage intake were significantly correlated between the two BEVQ-15 administrations (r = 0.41-0.85; P ≤ 0.01).
CONCLUSIONS: This updated version of the BEVQ-15 demonstrated moderate convergent validity and reproducibility for total beverage consumption among well-educated southwest Virginia adults.

PMID: 32283572 [PubMed – as supplied by publisher]

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Nevin Manimala Statistics

Induction versus adjuvant chemotherapy combined with concurrent chemoradiotherapy in locoregionally advanced nasopharyngeal carcinoma: A propensity score-matched analysis.

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Induction versus adjuvant chemotherapy combined with concurrent chemoradiotherapy in locoregionally advanced nasopharyngeal carcinoma: A propensity score-matched analysis.

Oral Oncol. 2020 Apr 10;105:104686

Authors: Tang SQ, Xu C, Wang XS, Tang LL, Li WF, Chen L, Mao YP, Guo R, Liu Q, Sun Y, Ma J

Abstract
OBJECTIVES: To explore the role of induction chemotherapy (IC) followed by concurrent chemoradiotherapy (CCRT) and CCRT plus adjuvant chemotherapy (AC) in locoregionally advanced nasopharyngeal carcinoma (LANPC).
MATERIALS AND METHODS: The propensity score-matched (PSM) method was adopted to balance variables. We identified independent prognostic factors using Cox regression analysis and compared outcomes between two chemotherapy treatment combinations for patients in different subgroups.
RESULTS: A total of 550 patients were selected by one-to-two PSM. Survival outcomes for the matched data set indicated that the IC + CCRT group achieved higher 5-year overall survival (OS; 89.3% vs 85.3%, P = 0.119), failure-free survival (FFS; 80.2% vs 79.0%, P = 0.722) and distant metastasis-free survival (DMFS; 87.4% vs 84.4%, P = 0.322) compared with CCRT + AC, although this was statistically non-significant. Subgroup analysis revealed that IC + CCRT was associated with significantly improved OS (Hazard ratio [HR] = 2.68, 95% Confidence interval [CI] = 1.16-6.22, P = 0.017), FFS (HR = 1.94, 95% CI = 1.06-3.57, P = 0.029) and locoregional relapse-free survival (LRRFS; HR = 2.63, 95% CI = 1.04-6.68, P = 0.034) in T3 disease. Moreover, this combination of treatment could significantly prolong OS (HR = 3.72, 95% CI = 1.41-9.80, P = 0.004) in N2 disease. However, the superiority of CCRT + AC was only observed in LRRFS (HR = 0.18, 95% CI 0.04-0.79, P = 0.010) for the T4 subgroup.
CONCLUSION: IC + CCRT should be strongly considered by patients with LANPC, especially those with T3 or N2 disease.

PMID: 32283514 [PubMed – as supplied by publisher]

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Nevin Manimala Statistics

Detecting small flaws in two-phase Ti-6Al-4V with rough surfaces.

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Detecting small flaws in two-phase Ti-6Al-4V with rough surfaces.

Ultrasonics. 2020 Mar 10;106:106128

Authors: Li X, Fu Y, Zhang F, Rao Y

Abstract
Surface roughness degrades the performance of ultrasonic methods when detecting sub-wavelength flaws. In this work, a roughness-modified doubly-scattered response (DSR) model is developed to enhance the flaw detection method for two-phase Ti-6Al-4V with rough surfaces. Extreme value statistics are used to calculate the confidence bounds of grain noise, then the bounds are treated as a time-dependent threshold for segmenting flaws in C-scan images of two-phase Ti-6Al-4V with rough surfaces. Three Ti-6Al-4V samples with different surface roughness are designed and manufactured for validating the present method; ultrasonic C-scan results show that it can distinguish sub-wavelength flaws (about 1/3 wavelength) in two-phase Ti-6Al-4V with rough surfaces, which can be extended to industry applications.

PMID: 32283418 [PubMed – as supplied by publisher]