A Note on Business Survival and Social Network

2018 ◽  
Vol 14 (2) ◽  
pp. 377-394 ◽  
Author(s):  
Chenlin Zhao ◽  
Ronald S. Burt
Keyword(s):  
Network Effects ◽  
Cumulative Advantage ◽  
Cross Sectional ◽  
Business Survival ◽  
History Of ◽  
Network Prediction ◽  
Chinese Entrepreneurs ◽  
Sectional Analysis ◽  
Closed Network ◽  
Network Advantage

ABSTRACTWe extend Burt, Burzynska, and Opper's cross-sectional network prediction of relative success among Chinese entrepreneurs by predicting which ventures are still active five years later. The cross-sectional analysis is corroborated in three ways (despite the vicissitudes of a national anti-corruption campaign): (1) Businesses run in 2012 by CEOs with a network rich in structural holes are more likely to be active five years later, in 2017. (2) Survival odds are improved if the large, open network around a CEO in 2012 was initially a supportive ‘cocoon’ closed network when the business was founded. (3) Both results are contingent on capturing theguanxities valuable early in the history of the business. The two network effects disappear when the network around a CEO is limited to his or her currently valued contacts. Beyond corroboration, we find that advantage is concentrated in ventures that began well and had become successful. Network advantage here does not compensate for weakness – it is a mechanism for cumulative advantage, amplifying the success of businesses already doing well.

scholarly journals Reported Neighborhood Traffic and the Odds of Asthma/Asthma-Like Symptoms: A Cross-Sectional Analysis of a Multi-Racial Cohort of Children

2020 ◽  
Vol 18 (1) ◽  
pp. 243
Author(s):  
Sarah Commodore ◽  
Pamela L. Ferguson ◽  
Brian Neelon ◽  
Roger Newman ◽  
William Grobman ◽  
...  
Keyword(s):  
Maternal Education ◽  
Ethnic Disparities ◽  
Traffic Density ◽  
Public Parks ◽  
Cross Sectional ◽  
Public Health Burden ◽  
Child Health Outcomes ◽  
History Of ◽  
Study Participants ◽  
Sectional Analysis

Asthma in children poses a significant clinical and public health burden. We examined the association between reported neighborhood traffic (a proxy for traffic-related air pollution) and asthma among 855 multi-racial children aged 4–8 years old who participated in the Environmental Influences on Child Health Outcomes (ECHO) cohort. We hypothesized that high neighborhood traffic density would be associated with the prevalence of asthma. Asthma/asthma-like symptoms (defined as current and/or past physician diagnosed asthma, past wheezing, or nighttime cough or wheezing in the past 12 months) was assessed by parental report. The relationship between neighborhood traffic and asthma/asthma-like symptoms was assessed using logistic regression. The prevalence of asthma/asthma-like symptoms among study participants was 23%, and 15% had high neighborhood traffic. Children with significant neighborhood traffic had a higher odds of having asthma/asthma-like symptoms than children without neighborhood traffic [adjusted OR = 2.01 (95% CI: 1.12, 3.62)] after controlling for child’s race-ethnicity, age, sex, maternal education, family history of asthma, play equipment in the home environment, public parks, obesity and prescribed asthma medication. Further characterization of neighborhood traffic is needed since many children live near high traffic zones and significant racial/ethnic disparities exist.

scholarly journals Natural history of fibrodysplasia ossificans progressiva: cross-sectional analysis of annotated baseline phenotypes

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Robert J. Pignolo ◽  
Geneviève Baujat ◽  
Matthew A. Brown ◽  
Carmen De Cunto ◽  
Maja Di Rocco ◽  
...  
Keyword(s):  
Natural History ◽  
Fibrodysplasia Ossificans Progressiva ◽  
Cross Sectional ◽  
Cross Sectional Analysis ◽  
History Of ◽  
Sectional Analysis

scholarly journals Do Black Lives Matter in the American Public’s Mitigation Responses to the Covid-19 Pandemic? A Cross-Sectional Analysis of Mask Wearing and Racial/ethnic Disparities in Deaths from COVID-19 in the United States

2021 ◽  
Author(s):  
Berkeley Franz ◽  
Adrienne Milner ◽  
Jomills H. Braddock
Keyword(s):  
Public Health ◽  
Residential Segregation ◽  
Ethnic Disparities ◽  
The United States ◽  
Ethnic Composition ◽  
Cross Sectional ◽  
Public Health Challenges ◽  
History Of ◽  
Sectional Analysis ◽  
Racial Ethnic

Abstract Background: Anti-black and anti-Hispanic attitudes in the U.S. must be included in efforts to understand resistance to public health measures, such as mask wearing, during the COVID-19 pandemic. Focusing on the structural and individual context of racism will enable us to improve public health and better prepare for future public health challenges. The purpose of this study was to determine the relationship between mask usage, racial segregation, and racial disparities in COVID-19 deaths.Methods: We used linear regression to assess whether the racial/ethnic composition of deaths and residential segregation predicted Americans’ decisions to wear masks in July 2020. Results: After controlling for mask mandates, mask usage increased when the White death rates relative to Black and Hispanic rates increased. Conclusions: Mask wearing may be shaped by an insensitivity to Black and Hispanic deaths and a corresponding unwillingness to engage in health protective behaviors. The broader history of systemic racism and residential segregation may also explain why white Americans do not wear masks or perceive themselves to be at risk when communities of color are disproportionately affected by COVID-19.

scholarly journals Eating alone at each meal and associated health status by cohabitation situation among Japanese community-dwelling elderly: a cross-sectional analysis of the KAGUYA study

2020 ◽  
Author(s):  
Osamu Kushida ◽  
Jong-Seong Moon ◽  
Daisuke Matsumoto ◽  
Naomi Yamasaki ◽  
Katsuhiko Takatori
Keyword(s):  
Health Status ◽  
Functional Capacity ◽  
Health Status Indicators ◽  
Subjective Health ◽  
Community Dwelling ◽  
Care Needs ◽  
Cross Sectional ◽  
Cross Sectional Analysis ◽  
History Of ◽  
Sectional Analysis

Abstract Background: This study investigated the association between eating alone at each meal and health status including functional capacity according to cohabitation situation among Japanese community-dwelling elderly.Methods: This was a cross-sectional analysis of baseline data from the Keeping Active across Generations Uniting the Youth and the Aged (KAGUYA) study in Japan. A self-administered questionnaire was mailed to all 8004 residents aged 65 or older residing in the same Japanese town the participants in March 2016. Eating alone was assessed by first asking whether participants ate three separate meals each day (i.e., breakfast, lunch, and dinner), and those who answered affirmatively were then asked how many people were usually present at each meal. Health status was assessed in terms of subjective health, medical history, care needs, body mass index, depression, and functional capacity.Results: Data from 3057 respondents were analyzed. Among those living with others, those who reported not being in good subjective health and a history of hypertension were significantly more likely to eat alone at breakfast (odds ratio 1.27; 95% confidence interval 1.01–1.61, and 1.26; 1.06–1.49). Depressive symptoms and many subscales of functional capacity were also significantly associated with eating alone at breakfast, lunch, and dinner (P < 0.05). Among those living alone, those eating alone at breakfast had lower scores for indicators of functional capacity including information practice (P = 0.010) and total scores (P = 0.049).Conclusions: For both cohabitation situations, many health status indicators were related to eating alone at each meal, especially breakfast.

scholarly journals Self-reported sleepiness and not the apnoea hypopnoea index is the best predictor of sleepiness-related accidents in obstructive sleep apnoea

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
P. Philip ◽  
S. Bailly ◽  
M. Benmerad ◽  
J. A. Micoulaud-Franchi ◽  
Y. Grillet ◽  
...  
Keyword(s):  
Obstructive Sleep Apnoea ◽  
Traffic Accidents ◽  
Sleep Apnoea ◽  
Near Miss ◽  
Cross Sectional ◽  
Periodic Leg Movements ◽  
Obstructive Sleep ◽  
History Of ◽  
Respiratory Polygraphy ◽  
Sectional Analysis

Abstract To evaluate the value of apnoea + hypopnoea index versus self-reported sleepiness at the wheel in anticipating the risk of sleepiness-related accidents in patients referred for obstructive sleep apnoea. A cross-sectional analysis of the French national obstructive sleep apnoea registry. 58,815 subjects referred for a suspicion of obstructive sleep apnoea were investigated by specific items addressing sleepiness at the wheel and sleepiness-related accidents. Apnoea + hypopnoea index was evaluated with a respiratory polygraphy or full polysomnography. Subjects had a median age of 55.6 years [45.3; 64.6], 65% were men, with a median apnoea + hypopnoea index of 22 [8; 39] events/h. Median Epworth sleepiness scale score was 9 [6; 13], 35% of the patients reported sleepiness at the wheel (n = 20,310), 8% (n = 4,588) reported a near-miss accident and 2% (n = 1,313) reported a sleepiness-related accident. Patients reporting sleepiness at the wheel whatever their obstructive sleep apnoea status and severity exhibited a tenfold higher risk of sleepiness-related accidents. In multivariate analysis, other predictors for sleepiness-related accidents were: male gender, ESS, history of previous near-miss accidents, restless leg syndrome/periodic leg movements, complaints of memory dysfunction and nocturnal sweating. Sleep apnoea per se was not an independent contributor. Self-reported sleepiness at the wheel is a better predictor of sleepiness-related traffic accidents than apnoea + hypopnoea index.

scholarly journals Fetal Echocardiography:Short Term Profile from Shahid Gangalal National Heart Centre, Kathmandu, Nepal

2016 ◽  
Vol 13 (1) ◽  
pp. 9-12
Author(s):  
Sudhir Regmi ◽  
Deewakar Sharma
Keyword(s):  
Pregnant Women ◽  
Congenital Heart ◽  
Fetal Echocardiography ◽  
Tertiary Care ◽  
Outcome Data ◽  
Cross Sectional ◽  
Vitro Fertilization ◽  
History Of ◽  
Sectional Analysis

Background and Aims: Fetal echocardiography is helpful in early detection of Congenital Heart Disease. Our study was conducted to evaluate the most common indications of referral and outcome in a tertiary-care fetal echocardiography practice.Methods: A Cross-sectional analysis of all pregnant women referred by obstetricians to cardiology unit for fetal echocardiography over a 1-year period (July 2014 and July 2015) was performed. The primary indications for referral for fetal echocardiography were obtained from the obstetric referral forms. Outcome data were extracted from performa containing client’s demographic, physical examination and the fetal echocardiograhic data. Postnatal Echocardiography was advised to all cases having positive echocardiographic finding.Results: A series of 251 fetal cardiac studies were reviewed. Average gestational age was 25.6 weeks (range, 18 to 38 weeks). Thirty-eight (15.1%) pregnant women had abnormal fetal cardiac findings. The most common referral for fetal cardiac scan was related to maternal indications (48.6%). Other indications were abnormal prenatal fetal findings in ultrasonography (23.1%), family history of CHD (12%), general screening (15.5%), and follow up of IVF (In-vitro fertilization) (0.8%). The highest yield of significant abnormal findings was there among patients referred with abnormal prenatal fetal finding in ultrasonography (47%).Conclusion: Majority of referral were for abnormal prenatal ultrasonographic findings. So, fetal Echocardiography is an important part of overall management of the pregnancy at risk for producing an infant with congenital heart disease.Nepalese Heart Journal 2016; 13(1): 9-12

scholarly journals Cross-sectional analysis of the prevalence and predictors of statin utilisation in Ireland with a focus on primary prevention of cardiovascular disease

BMJ Open ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. e018524 ◽  
Author(s):  
Paula Byrne ◽  
John Cullinan ◽  
Catríona Murphy ◽  
Susan M Smith
Keyword(s):  
Cardiovascular Disease ◽  
Cardiovascular Risk ◽  
Primary Prevention ◽  
Sociodemographic Factors ◽  
Cross Sectional ◽  
Factors Associated ◽  
History Of ◽  
Base Category ◽  
Sectional Analysis ◽  
Prevention Of Cardiovascular Disease

ObjectiveTo describe the prevalence of statin utilisation by people aged over 50 years in Ireland and the factors associated with the likelihood of using a statin, focusing particularly on those using statins for primary prevention of cardiovascular disease (CVD).MethodsThis is a cross-sectional analysis of cardiovascular risk and sociodemographic factors associated with statin utilisation from wave 1 of The Irish Longitudinal Study on Ageing. A hierarchy of indications for statin utilisation, consisting of eight mutually exclusive levels of CVD-related diagnoses, was created. Participants were assigned one level of indication. The prevalence of statin utilisation was calculated. The likelihood that an individual was using a statin was estimated using a multivariable logistic regression model, controlling for cardiovascular risk and sociodemographic factors.ResultsIn this nationally representative sample (n=5618) of community-dwelling participants aged 50 years and over, 1715 (30.5%) were taking statins. Of these, 65.0% (57.3% of men and 72.7% of women) were doing so for the primary prevention of CVD. Thus, almost two-thirds of those taking statins did so for primary prevention and there was a notable difference between women and men in this regard. We also found that statin utilisation was highest among those with a prior history of CVD and was significantly associated with age (compared with the base category 50–64 years; 65–74 years OR 1.38 (95% CI 1.16 to 1.65); 75+ OR 1.33 (95% CI 1.04 to 1.69)), living with a spouse or partner (compared with the base category living alone; OR 1.35 (95% CI 1.10 to 1.65)), polypharmacy (OR 1.74 (95% CI 1.39 to 2.19)) and frequency of general practitioner visits (compared with the base category 0 visits per year; 1–2 visits OR 2.46 (95% CI 1.80 to 3.35); 3–4 visits OR 3.24 (95% CI 2.34 to 4.47); 5–6 visits OR 2.98 (95% CI 2.08 to 4.26); 7+ visits OR 2.51 (95% CI 1.73 to 3.63)), even after controlling for clinical need. There was no association between using statins and gender, education, income, social class, health insurance status, location or Systematic Coronary Risk Evaluation (SCORE) risk in the multivariable analysis.ConclusionStatin utilisation among those with no history of CVD accounted for almost two-thirds of all statin use, in part reflecting the high proportion of the population with no history of CVD, although utilisation rates were highest among those with a history of CVD.

scholarly journals Carotid Intima Media Thickness and Comorbid Cardiometabolic Dysfunction in Women: The SWAN Study

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. 55-55
Author(s):  
Aleda Leis ◽  
Emma Barinas-Mitchell ◽  
Ana Baylin ◽  
Samar El Khoudary ◽  
Elizabeth Jackson ◽  
...  
Keyword(s):  
Intima Media Thickness ◽  
Carotid Intima Media Thickness ◽  
Obese Women ◽  
Linear Regression Models ◽  
Cross Sectional ◽  
Media Thickness ◽  
Prevalence Of Obesity ◽  
History Of ◽  
Sectional Analysis ◽  
Combined Impact

Abstract Metabolic syndrome (MetS) and obesity are risk factors for atherosclerosis but their combined impact is unknown. The aim of this study was to quantify the added risk of obesity on carotid artery intima media thickness (cIMT), an early indicator for atherosclerosis, beyond MetS alone. The Study of Women’s Health Across the Nation (SWAN) is a multi-center, multi-ethnic cohort of women traversing the midlife into early late adulthood. cIMT was assessed between 2005-2007 and MetS, obesity and covariates were measured at the same time. This cross-sectional analysis is restricted to 1,433 women with a body mass index ≥18.5 kg/m2 and free of cardiovascular disease (CVD) when cIMT was measured. Mean maximum cIMT was related to obesity, MetS and their interaction using multivariable linear regression models. The average age was 60 years (standard deviation 2.7) and the prevalence of obesity and MetS were 44% and 35%, respectively. Both conditions occurred in 24% of women. After adjustment for age, race, smoking, family history of heart disease, and antilipemic medications, obese women had a 0.051mm (95% confidence interval (CI): 0.033,0.070; p&lt;0.001) larger maximum cIMT versus women not obese and women with MetS had a 0.066mm (95%CI: 0.042,0.090; p&lt;0.001) larger maximum cIMT versus women without MetS. There was a statistically significant antagonistic interaction between obesity and MetS; women with both had a mean cIMT of 0.972mm (95%CI: 0.955,0.989) and MetS alone a cIMT of 0.961mm (95%CI:0.938,0.983). This suggests that there is only a small risk of obesity on augmenting cIMT beyond MetS alone.

scholarly journals Breakthrough infection with SARS-CoV-2 and its predictors among healthcare workers in a medical college and hospital complex in Delhi, India

2021 ◽  
Author(s):  
Pragya Sharma ◽  
Suruchi Mishra ◽  
Saurav Basu ◽  
Neha Tanwar ◽  
Rajesh Kumar
Keyword(s):  
Healthcare Workers ◽  
Past History ◽  
Supplemental Oxygen ◽  
Breakthrough Infection ◽  
Cross Sectional ◽  
Study Objective ◽  
Medical College ◽  
History Of ◽  
Sectional Analysis ◽  
Supplemental Oxygen Therapy

Introduction The study objective was to determine the breakthrough infection rate of Covid-19 (SARS-CoV-2) infection in those vaccinated with either BBV152 or AZD1222 (ChAdOx1-S) vaccine among healthcare workers (HCWs). Methods A cross-sectional analysis was conducted a medical college and hospital complex in Delhi, India through telephonic interviews among HCWs who had received at-least one dose of a Covid-19 vaccine during January to March 2021. Breakthrough infections were operationally defined as occurrence of Covid-19 infection 14 days after administration of two doses of either Covid-19 vaccine. Results We enrolled 326 HCWs with mean (SD) age of 29.1 (85.9) years including 212 (65%) males. Two hundred eighty (90.9%) HCWs were fully vaccinated while 46 (14.1%) were partially vaccinated. There were 168 (51.5%) BBV152 and 158 (48.5%) AZD1222 (ChAdOx1-S) recipients. A total of 36 (11%, 95% C.I. 8.1, 14.9) breakthrough infections were reported in the HCWs. The median (IQR) time until incidence of Covid-19 infection since receiving second dose of either Covid-19 vaccine was 46 (28.2, 54.7) days. Furthermore, Covid-19 infections occurred in 65 (19.9%, 95% C.I 15.9, 24.6) HCWs vaccinated with at-least one dose of vaccine but prior to receiving their second dose or <14 days post second dose. Most breakthrough infection cases (94.4%) were mild and did not require supplemental oxygen therapy. HCWs with past history of natural Covid-19 infection with recovery were 4.5 times less likely to experience a Covid-19 infection after partial vaccination. Conclusion Nearly one in nine HCWs experienced a Covid-19 breakthrough infection in the present study.

The Relationship of Venous Diameter to Reflux, Cephalad Thrombus and Cephalad Reflux Following Deep Venous Thrombosis

1997 ◽  
Vol 77 (03) ◽  
pp. 462-465 ◽  
Author(s):  
M J Tullis ◽  
M H Meissner ◽  
R O Bergelin ◽  
M T Caps ◽  
R A Manzo ◽  
...  
Keyword(s):  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Previous History ◽  
Cross Sectional ◽  
History Of ◽  
Venous Diameter ◽  
The Common ◽  
Sectional Analysis ◽  
Relationship Of ◽  
The Relationship

SummaryDuplex ultrasonography was used to measure the diameters of the common femoral, superficial femoral and popliteal vein segments in 123 patients following DVT. A cross sectional analysis was done based on the most recent visit to determine chronic venous diameter changes following DVT.Venous diameters in recanalized segments were smaller at all levels compared to those never occluded (p = 0.06 for CFV and p <0.05 for SFV and PV). After accounting for a previous history of occlusion, the diameters of the segments with and without reflux were not significantly different. There was also no evidence of venodilation in segments caudal to cephalad reflux or thrombus.Recanalized veins are smaller in diameter than those which were never thrombosed. Cephalad thrombus or reflux is not associated with venodilatation of caudal segments. Reflux following DVT is probably secondary to valvular damage rather than hypertension, since there was no diameter difference between refluxing and non-refluxing segments.

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