scholarly journals Impact of Powered Toothbrush Use and Interdental Cleaning on Oral Health

2020 ◽  
pp. 002203452097395
Author(s):  
V. Pitchika ◽  
R. Jordan ◽  
W. Micheelis ◽  
A. Welk ◽  
T. Kocher ◽  
...  
Keyword(s):  
Oral Health ◽  
Population Level ◽  
Cross Sectional ◽  
Free Surfaces ◽  
Number Of Teeth ◽  
Long Run ◽  
Probing Depth ◽  
Health Studies ◽  
Using Data ◽  
Lower Magnitude

The long-term effectiveness of powered toothbrushes (PTBs) and interdental cleaning aids (IDAs) on a population level is unproven. We evaluated to what extent changes in PTB and IDA use may explain changes in periodontitis, caries, and tooth loss over the course of 17 y using data for adults (35 to 44 y) and seniors (65 to 74 y) from 3 independent cross-sectional surveys of the German Oral Health Studies (DMS). Oaxaca decomposition analyses assessed to what extent changes in mean probing depth (PD), number of caries-free surfaces, and number of teeth between 1) DMS III and DMS V and 2) DMS IV and DMS V could be explained by changes in PTB and IDA use. Between DMS III and V, PTB (adults: 33.5%; seniors: 28.5%) and IDA use (adults: 32.5%; seniors: 41.4%) increased along with an increase in mean PD, number of caries-free surfaces, and number of teeth. Among adults, IDA use contributed toward increased number of teeth between DMS III and V as well as DMS IV and V. In general, the estimates for adults were of lower magnitude. Among seniors between DMS III and V, PTB and IDA use explained a significant amount of explained change in the number of caries-free surfaces (1.72 and 5.80 out of 8.44, respectively) and the number of teeth (0.49 and 1.25 out of 2.19, respectively). Between DMS IV and V, PTB and IDA use contributed most of the explained change in caries-free surfaces (0.85 and 1.61 out of 2.72, respectively) and the number of teeth (0.25 and 0.46 out of 0.94, respectively) among seniors. In contrast to reported results from short-term clinical studies, in the long run, both PTB and IDA use contributed to increased number of caries-free healthy surfaces and teeth in both adults and seniors.

What Goes Up Might Not Come Down: Modeling Directional Asymmetry with Large-N, Large-T Data

2021 ◽  
pp. 008117502110463
Author(s):  
Ryan P. Thombs ◽  
Xiaorui Huang ◽  
Jared Berry Fitzgerald
Keyword(s):  
Fixed Effects ◽  
Directional Asymmetry ◽  
Cross Sectional ◽  
Monte Carlo Experiments ◽  
Long Run ◽  
Large N ◽  
Fixed Effects Estimator ◽  
Cross Sectional Dependence ◽  
Using Data ◽  
Heterogeneous Panel

Modeling asymmetric relationships is an emerging subject of interest among sociologists. York and Light advanced a method to estimate asymmetric models with panel data, which was further developed by Allison. However, little attention has been given to the large- N, large- T case, wherein autoregression, slope heterogeneity, and cross-sectional dependence are important issues to consider. The authors fill this gap by conducting Monte Carlo experiments comparing the bias and power of the fixed-effects estimator to a set of heterogeneous panel estimators. The authors find that dynamic misspecification can produce substantial biases in the coefficients. Furthermore, even when the dynamics are correctly specified, the fixed-effects estimator will produce inconsistent and unstable estimates of the long-run effects in the presence of slope heterogeneity. The authors demonstrate these findings by testing for directional asymmetry in the economic development–CO2 emissions relationship, a key question in macro sociology, using data for 66 countries from 1971 to 2015. The authors conclude with a set of methodological recommendations on modeling directional asymmetry.

scholarly journals Estimating the cumulative incidence of SARS-CoV-2 infection and the infection fatality ratio in light of waning antibodies

2020 ◽  
Author(s):  
Kayoko Shioda ◽  
Max SY Lau ◽  
Alicia NM Kraay ◽  
Kristin N Nelson ◽  
Aaron J Siegler ◽  
...  
Keyword(s):  
New York ◽  
Cumulative Incidence ◽  
National Science Foundation ◽  
Population Level ◽  
Credible Interval ◽  
Mortality Data ◽  
Cross Sectional ◽  
Seroprevalence Data ◽  
The Us ◽  
Using Data

AbstractBackgroundSerology tests can identify previous infections and facilitate estimation of the number of total infections. However, immunoglobulins targeting severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) have been reported to wane below the detectable level of serological assays. We estimate the cumulative incidence of SARS-CoV-2 infection from serology studies, accounting for expected levels of antibody acquisition (seroconversion) and waning (seroreversion), and apply this framework using data from New York City (NYC) and Connecticut.MethodsWe estimated time from seroconversion to seroreversion and infection fatality ratio (IFR) using mortality data from March-October 2020 and population-level cross-sectional seroprevalence data from April-August 2020 in NYC and Connecticut. We then estimated the daily seroprevalence and cumulative incidence of SARS-CoV-2 infection.FindingsThe estimated average time from seroconversion to seroreversion was 3-4 months. The estimated IFR was 1.1% (95% credible interval: 1.0-1.2%) in NYC and 1.4% (1.1-1.7%) in Connecticut. The estimated daily seroprevalence declined after a peak in the spring. The estimated cumulative incidence reached 26.8% (24.2-29.7%) and 8.8% (7.1-11.3%) at the end of September in NYC and Connecticut, higher than maximum seroprevalence measures (22.1% and 6.1%), respectively.InterpretationThe cumulative incidence of SARS-CoV-2 infection is underestimated using cross-sectional serology data without adjustment for waning antibodies. Our approach can help quantify the magnitude of underestimation and adjust estimates for waning antibodies.FundingThis study was supported by the US National Science Foundation and the National Institute of Allergy and Infectious Diseases.

scholarly journals The Mediator Effect of Visual Impairment in the Relationship between Poor Oral Health and Depression

2020 ◽  
pp. 1-16
Author(s):  
Obinna F. Akano ◽  
Michael A. Joseph ◽  
Elizabeth Helzner ◽  
Aimee Afable
Keyword(s):  
Oral Health ◽  
Visual Impairment ◽  
Significant Relationship ◽  
Secondary Analysis ◽  
Cross Sectional Study ◽  
Behavioral Risk ◽  
Cross Sectional ◽  
Global Estimate ◽  
Using Data ◽  
The Relationship

Purpose: Visual impairment (VI) with a global estimate of 161 million has been associated with a lot of health concerns and physical conditions. This study investigates the mediator effect of visual impairment on the relationship between poor oral health and depression. Methods: This was a cross-sectional study involving secondary analysis using data from the 2010 Behavioral Risk Factor Surveillance System (BRFSS). Self-reported visual impairment was categorized as no and yes (a little difficulty, moderate difficulty, extreme difficulty and unable to do because of eyesight). The responses to oral health were dichotomized to 0-5 teeth removed and 6+ teeth removed (poor oral health). For depression, we used physician-diagnosed depression (yes or no) and self-rated depression (validated Patient Health Questionnaire-8) (PHQ-8). We examined the association between visual impairment and depression using multivariable logistic regression accounting for the survey’s complex design. Results: After adjusting for socio-demographic variables, health behavior, BMI and diabetes; the model produced a significant relationship between poor oral health and depression. Controlling for visual impairment resulted in the attenuation of the effect poor oral health has on depression. Furthermore, after improving eyesight, a previously significant relationship between poor oral and depression became non-significant. Conclusion: Controlling for visual impairment, by treating or preventing visual impairment, in patients with poor oral health, merely indicates a reduction in the outcome of depression.

scholarly journals Association of Self-Perceived Oral Health and Function with Clinically Determined Oral Health Status among Adults Aged 35–54 Years: A Cross-Sectional Study

2018 ◽  
Vol 15 (8) ◽  
pp. 1681 ◽  
Author(s):  
Se-Yeon Kim ◽  
Ji-Eun Kim ◽  
Han-Na Kim ◽  
Eun-Joo Jun ◽  
Jung-Ha Lee ◽  
...  
Keyword(s):  
Health Status ◽  
Oral Health ◽  
Household Income ◽  
Cross Sectional Study ◽  
Oral Health Status ◽  
Sectional Study ◽  
Cross Sectional ◽  
Periodontal Status ◽  
Using Data ◽  
And Function

This study aimed to analyse the association of self-perceived oral health status (OHS) and functions with clinical OHS in Korean adults aged 35–54 years. The study was designed as a cross-sectional study using data from the Fourth Korea National Health and Nutrition Examination Survey (2007–2009). A total of 6605 subjects aged 35–54 years who completed the oral examination and questionnaires were included. An association of self-perceived OHS and functions with clinically determined OHS was confirmed by a complex-samples general linear model. Data on socioeconomic variables, i.e., household income and education level, self-perceived OHS and functions, such as chewing and speaking, were collected by trained interviewers. The clinical OHS was determined by trained dentists and included the number of untreated decayed teeth (DT); decayed, missing, and filled teeth (DMFT); prosthetic and periodontal status. The combined score was estimated as the sum of self-perceived OHS and functions. Based on the estimation coefficient, the clinical variables that were most strongly associated with self-perceived OHS and functions were, in order, periodontal status, prosthetic status, DT, and DMFT. In addition, the combined score for self-perceived OHS and functions was associated with household income, education, and clinically determined OHS.

scholarly journals Association of the Dietary Index Underpinning the Nutri-Score Label with Oral Health: Preliminary Evidence from a Large, Population-Based Sample

Nutrients ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1998 ◽  
Author(s):  
Valentina A. Andreeva ◽  
Manon Egnell ◽  
Pilar Galan ◽  
Gilles Feron ◽  
Serge Hercberg ◽  
...  
Keyword(s):  
Oral Health ◽  
Diet Quality ◽  
Large Population ◽  
Health Assessment ◽  
Population Level ◽  
Preliminary Evidence ◽  
Population Based ◽  
Future Research ◽  
Cross Sectional ◽  
Dietary Index

The 2017 implementation in France of the front-of-package nutrition label known as ‘Nutri-Score’ was intended as a public health strategy to help individuals make healthier food choices at the point of purchase and thus help reduce chronic disease on the population level. Nutri-Score and the associated individual-level dietary index are based on the British Food Standards Agency Nutrient Profiling System (FSAm-NPS-DI). Prior research has shed light on the relation between the dietary index and various physical health outcomes, yet no studies have explored the link with oral health. We analyzed the cross-sectional association of the dietary index with oral health in a population-based sample of 33,231 adults from the French NutriNet-Santé cohort. Oral health (main dependent variable) was assessed in 2016 with the General Oral Health Assessment Index; FSAm-NPS-DI (main independent variable) was calculated using ≥3 non-consecutive 24-h dietary records, following established methodology; lower scores corresponded to better diet quality. Age-specific associations were explored via multivariable linear regression. Fully-adjusted models showed modest yet significant associations between the dietary index and oral health in younger (18–59 years) and older (60+ years) participants, with the strength of the model being more pronounced in the former compared with the latter age group (F value: 28.5 versus 6.3, both p < 0.0001). Higher diet quality was associated with a somewhat lower risk of oral health problems. Albeit preliminary, the findings support the relevance of dietary indices underpinning nutrition labels such as the Nutri-Score. Future research is needed to confirm the associations.

scholarly journals Financial Development and Economic Growth: Evidence from the Eurozone

2021 ◽  
Vol 4 (1) ◽  
pp. p7
Author(s):  
Pavlos Stamatiou ◽  
Maria Papadopoulou
Keyword(s):  
Economic Growth ◽  
Financial Development ◽  
Trade Openness ◽  
Panel Analysis ◽  
Cross Sectional ◽  
Analysis Techniques ◽  
Long Run ◽  
Cross Sectional Dependence ◽  
Using Data ◽  
The Relationship

The aim of this paper is to investigate the relationship between financial development and economic growth, within a panel framework that also accounts for trade openness, for the case of Eurozone using data covering the period 1990-2018. We explore this relationship using panel analysis techniques, robust to cross sectional dependence, in order to investigate the presence of causality between the variables. The cointegration results suggested that there is one cointegrated vector between the functions of economic growth, financial development and trade openness. In addition, the causality results of the study revealed, both in the short and long-run, that there is a unidirectional causal relationship between financial development and economic growth with direction from economic growth to financial development, as well as a unidirectional causality running from trade openness to financial development.

Electricity consumption and economic growth in ASEAN

2017 ◽  
Vol 5 (2) ◽  
pp. 16
Author(s):  
Ahmad Ghazali Ismail ◽  
Arlinah Abd Rashid ◽  
Azlina Hanif
Keyword(s):  
Economic Growth ◽  
Energy Use ◽  
Electricity Consumption ◽  
Panel Estimation ◽  
Real Gdp ◽  
Long Run ◽  
Bidirectional Relationship ◽  
Short Run ◽  
Using Data ◽  
The Relationship

The relationship and causality direction between electricity consumption and economic growth is an important issue in the fields of energy economics and policies towards energy use. Extensive literatures has discussed the issue, but the array of findings provides anything but consensus on either the existence of relations or direction of causality between the variables. This study extends research in this area by studying the long-run and causal relations between economic growth, electricity consumption, labour and capital based on the neo-classical one sector aggregate production technology mode using data of electricity consumption and real GDP for ASEAN from the year 1983 to 2012. The analysis is conducted using advanced panel estimation approaches and found no causality in the short run while in the long-run, the results indicate that there are bidirectional relationship among variables. This study provides supplementary evidences of relationship between electricity consumption and economic growth in ASEAN.

Diagnostics of metal samples using the results of experimental and theoretical study of positively charged microparticles formed upon sample destruction

2018 ◽  
Vol 84 (10) ◽  
pp. 23-28
Author(s):  
D. A. Golentsov ◽  
A. G. Gulin ◽  
Vladimir A. Likhter ◽  
K. E. Ulybyshev
Keyword(s):  
Experimental Data ◽  
Early Stage ◽  
Experimental Studies ◽  
Material Model ◽  
Total Charge ◽  
Cross Sectional ◽  
Practical Applications ◽  
Mechanical And Electrical Properties ◽  
Order Of Magnitude ◽  
Using Data

Destruction of bodies is accompanied by formation of both large and microscopic fragments. Numerous experiments on the rupture of different samples show that those fragments carry a positive electric charge. his phenomenon is of interest from the viewpoint of its potential application to contactless diagnostics of the early stage of destruction of the elements in various technical devices. However, the lack of understanding the nature of this phenomenon restricts the possibility of its practical applications. Experimental studies were carried out using an apparatus that allowed direct measurements of the total charge of the microparticles formed upon sample rupture and determination of their size and quantity. The results of rupture tests of duralumin and electrical steel showed that the size of microparticles is several tens of microns, the particle charge per particle is on the order of 10–14 C, and their amount can be estimated as the ratio of the cross-sectional area of the sample at the point of discontinuity to the square of the microparticle size. A model of charge formation on the microparticles is developed proceeding from the experimental data and current concept of the electron gas in metals. The model makes it possible to determine the charge of the microparticle using data on the particle size and mechanical and electrical properties of the material. Model estimates of the total charge of particles show order-of-magnitude agreement with the experimental data.

scholarly journals Panel Econometric Analysis on Mobile Payment Transactions and Traditional Banks Effort toward Financial Accessibility in Sub-Sahara Africa

2020 ◽  
Vol 12 (3) ◽  
pp. 895 ◽  
Author(s):  
Cephas Paa Kwasi Coffie ◽  
Hongjiang Zhao ◽  
Isaac Adjei Mensah
Keyword(s):  
Time Series Data ◽  
Unit Root Test ◽  
Panel Cointegration ◽  
Ordinary Least Squares ◽  
Sustainable Growth ◽  
Series Data ◽  
Mobile Payment ◽  
Cross Sectional ◽  
Mobile Payments ◽  
Long Run

The financial landscape of sub-Sahara Africa is undergoing major changes due to the advent of FinTech, which has seen mobile payments boom in the region. This paper examines the salient role of mobile payments in traditional banks’ drive toward financial accessibility in sub-Sahara Africa by using panel econometric approaches that consider the issues of independencies among cross-sectional residuals. Using data from the World Development Index (WDI) 2011–2017 on 11 countries in the region, empirical results from cross-sectional dependence (CD) tests, panel unit root test, panel cointegration test, and the fully modified ordinary least squares (FMOLS) approach indicates that (i) the panel time series data are cross-sectionally independent, (ii) the variables have the same order of integration and are cointegrated, and (iii) growth in mobile payment transactions had a significant positive relationship with formal account ownership, the number of ATMs, and number of new bank branches in the long-run. The paper therefore confirms that the institutional structure of traditional banks that makes them competitive, irrespective of emerging disruptive technologies, has stimulated overall financial accessibility in the region leading to overall sustainable growth in the financial sector. We conclude the paper with feasible policy suggestions.

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