scholarly journals Cohort's Analysis in eCommerce

2021 ◽  
pp. 203-206
Author(s):  
Manali M Walanj
Keyword(s):  
Data Structures ◽  
Cohort Analysis ◽  
Identification Problem ◽  
Hierarchical Bayes ◽  
Outcome Variable ◽  
Cross Sectional ◽  
Problem Resolution ◽  
Linear Dependency ◽  
Temporal Dimensions ◽  
Cohort Analyses

Cohort analysis treats an outcome variable as a function of cohort membership, age, and period. The linear dependency of the three temporal dimensions always creates an identification problem. Resolution of this problem requires external knowledge that is often difficult to acquire. Most satisfactory is the introduction of variables held to measure the dimensions that underlie at least one of age, period and cohort. Such measured, substantive variables can provide direct tests of cohort-based explanations. A Promising path for future technical development is a hierarchical Bayes approach, which treats appropriately defined cohort, age, and period contrasts as randomly distributed and allows for their dependence on substantive, measured variables. Models that include age, period, and cohort can also include interactions between these dimensions, but not all such interactions are identified. This extends the realism of cohort models, since many phenomena seem to require specifications that allow for interactions between two or more of age, period, and cohort. Panel studies and cross-sectional studies with retrospective information not only support cohort analyses, they engender them. These longitudinal data structures do not, however, provide the basis for a solution to the identification problem.[5]

scholarly journals Maternal healthcare utilsation and complete childhood vaccination in sub-Saharan Africa: a cross-sectional study of 29 nationally representative surveys

BMJ Open ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. e045992
Author(s):  
Eugene Budu ◽  
Bright Opoku Ahinkorah ◽  
Richard Gyan Aboagye ◽  
Ebenezer Kwesi Armah-Ansah ◽  
Abdul-Aziz Seidu ◽  
...  
Keyword(s):  
Healthcare Utilisation ◽  
Cross Sectional Study ◽  
Sub Saharan Africa ◽  
Childhood Vaccination ◽  
Outcome Variable ◽  
Service Utilisation ◽  
Sectional Study ◽  
Maternal Healthcare ◽  
Cross Sectional ◽  
Sub Saharan

ObjectiveThe objective of the study was to examine the association between maternal healthcare utilisation and complete childhood vaccination in sub-Saharan Africa.DesignOur study was a cross-sectional study that used pooled data from 29 countries in sub-Saharan Africa.ParticipantsA total of 60 964 mothers of children aged 11–23 months were included in the study.Outcome variablesThe main outcome variable was complete childhood vaccination. The explanatory variables were number of antenatal care (ANC) visits, assistance during delivery and postnatal care (PNC).ResultsThe average prevalence of complete childhood vaccination was 85.6%, ranging from 67.0% in Ethiopia to 98.5% in Namibia. Our adjusted model, children whose mothers had a maximum of three ANC visits were 56% less likely to have complete vaccination, compared with those who had at least four ANC visits (adjusted OR (aOR)=0.44, 95% CI 0.42 to 0.46). Children whose mothers were assisted by traditional birth attendant/other (aOR=0.43, 95% CI 0.41 to 0.56) had lower odds of complete vaccination. The odds of complete vaccination were lower among children whose mothers did not attend PNC clinics (aOR=0.26, 95% CI 0.24 to 0.29) as against those whose mothers attended.ConclusionThe study found significant variations in complete childhood vaccination across countries in sub-Saharan Africa. Maternal healthcare utilisation (ANC visits, skilled birth delivery, PNC attendance) had significant association with complete childhood vaccination. These findings suggest that programmes, interventions and strategies aimed at improving vaccination should incorporate interventions that can enhance maternal healthcare utilisation. Such interventions can include education and sensitisation, reducing cost of maternal healthcare and encouraging male involvement in maternal healthcare service utilisation.

Social inequality in parent–infant relations: Epidemiological study of community nurse records

2021 ◽  
pp. 140349482098313
Author(s):  
Bjørn E. Holstein ◽  
Sofie Weber Pant ◽  
Janni Ammitzbøll ◽  
Trine Pagh Pedersen
Keyword(s):  
Community Sample ◽  
Occupational Status ◽  
Home Visits ◽  
Cross Sectional Study ◽  
Outcome Variable ◽  
Immigrant Parents ◽  
First Year ◽  
Cross Sectional ◽  
Parents And Children ◽  
First Year Of Life

Background: Some studies suggest that favourable socioeconomic circumstances are associated with better parent–child relations but the documentation of such an association is limited and inconsistent. Few studies focused on infancy, few studies relied on objective measurement of parent–infant relations, and few studies included more than one measurement of parent–infant relations in the first year of life. Aims: To report the prevalence of objectively measured problems in parent–infant relations during the first year of life and to examine the association between socioeconomic circumstances and parent–infant relations in an unselected community sample of infants. Methods: Cross-sectional study of a community sample of children from birth to 10 months in 15 municipalities in Denmark, n = 11,765. The exposure variables were population register data about socioeconomic circumstances: (a) parents’ education, (b) family composition, (c) parents’ origin, and (d) parents’ occupational status. The outcome variable was the health visitor’s concerns about the parent–infant relation assessed at four home visits from birth to 10 months after delivery. Results: The proportion of children with concerns about the parent–infant relation was 10.5%, 7.8% at one home visit and 2.8% at two or more home visits. Logistic regression analyses showed that all four indicators of socioeconomic circumstances were associated with concerns about the parent–infant relation in the first year of life. Conclusions: The risk of problematic parent–infant relations were significantly elevated among, children of immigrant parents, and children of parents with shorter education and not in education or work.

scholarly journals Pain acceptance and its impact on function and symptoms in fibromyalgia

2020 ◽  
Vol 20 (4) ◽  
pp. 727-736 ◽  
Author(s):  
Synne Flatlandsmo Tangen ◽  
Anne-Sofie Helvik ◽  
Hilde Eide ◽  
Egil A. Fors
Keyword(s):  
Chronic Pain ◽  
Linear Regression ◽  
Burden Of Illness ◽  
Longitudinal Design ◽  
Fibromyalgia Impact Questionnaire ◽  
Experimental Studies ◽  
Outcome Variable ◽  
Unknown Etiology ◽  
Cross Sectional ◽  
Pain Acceptance

AbstractObjectivesFibromyalgia is a chronic widespread pain (CWP) syndrome of unknown etiology with substantial burden of illness and functional impairment. Pain acceptance has emerged as an interesting target of therapy in chronic pain populations, but few studies have yet been done on the effect of pain acceptance on patients with fibromyalgia. The aim of the present study was to examine the relationship between pain acceptance and its impact on function and symptoms in fibromyalgia with both a cross-sectional and longitudinal design.MethodsThree hundred and sixty five participants aged 22–70 with fibromyalgia were recruited from the Norwegian Fibromyalgia Association (NFA). They filled out a questionnaire containing the Fibromyalgia Impact Questionnaire (FIQ), measurement of function and symptoms, and Chronic Pain Acceptance Questionnaire (CPAQ), measurement of pain acceptance, in addition to sociodemographic and clinical variables such as degree of fibromyalgia, depression and pain duration (T1 measures). One year after, 87 of the participants filled out the FIQ and clinical measures once again (T2 measures). Unadjusted and adjusted linear regression analyses were performed both for cross-sectional measures at T1 and for longitudinal measures from T1 to T2, with FIQ score as the outcome variable and CPAQ score at T1 as one of the main independent variables.ResultsHigher CPAQ score was significantly associated with a lower FIQ score at T1, also when adjusting for age, education, work, depression and Fibromyalgianess Score (p<0.01). Lower FIQ score indicate less impact of fibromyalgia on functioning. In addition, two adjusted linear regression models found higher pain acceptance (CPAQ score) at T1 to be associated with lower negative impact of fibromyalgia on function and symptoms (FIQ score) at T2 (p<0.01).ConclusionsHigher pain acceptance is associated with better functional level and less symptoms in fibromyalgia, both cross-sectionally and when measurements are separated in time. Further research should include experimental studies with acceptance-based interventions for this patient group.

Lymphopenia and risk for long-term mortality among patients undergoing coronary angiography

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
B Zafrir ◽  
R Jaffe ◽  
H Sliman ◽  
O Barnett-Griness ◽  
W Saliba
Keyword(s):  
Coronary Angiography ◽  
Mortality Risk ◽  
Predictive Accuracy ◽  
Cohort Analysis ◽  
Cox Proportional Hazards ◽  
Cross Sectional ◽  
Distribution Width ◽  
Increased Risk ◽  
Long Term Mortality

Abstract Background Lymphopenia has been shown to be associated with adverse prognosis in chronic disease states that are related to immune dysregulation. Purpose We aimed to determine the association between lymphopenia and all-cause mortality in patients presenting to coronary angiography with or without acute coronary syndromes (ACS). We also investigated whether elevated red blood cell distribution width (RDW), an established cardiovascular prognostic marker, further refines risk stratification and improves predictive accuracy beyond lymphocytes count. Methods Retrospective cohort analysis of patients undergoing coronary angiography for evaluation or treatment of coronary artery disease between 2003 and 2018. Long-term mortality risk associated with relative (1000–1500 /μL) or severe (&lt;1000 /μL) lymphopenia was analyzed using Cox proportional hazards regression models, adjusting for comorbidities, ACS and RDW. Results Overall, 15179 patients underwent coronary angiography, at a mean age of 65±12 years. On cross-sectional analysis, lymphopenia was associated with kidney disease, cancer, heart failure and presentation with ACS, but lower rates of smoking and obesity. During a median follow-up of 7 (IQR 3.5–11.5) years, 4253 patients died. Compared to normal lymphocytes count (1500–5000 /μL), the multivariable adjusted hazard ratio (HR) (95% confidence interval) for mortality was 1.31 (1.21–1.41) and 1.97 (1.75–2.22) for relative and severe lymphopenia, respectively. The increase in mortality associated with severe lymphopenia was significant in patients presenting with non-ACS [HR 2.18 (1.74–2.73)], ST-segment elevation myocardial infarction (STEMI) [HR 1.59 (1.15–2.21)], or unstable angina/non-STEMI [HR 2.00 (1.70–2.34)]; p-for-interaction 0.626. The association of lymphopenia with mortality remained significant after additional adjustment to RDW. High RDW (&gt;14.5%) was associated with increased mortality risk in each of the lymphocytes count groups, and improved the predictive accuracy with AUC increase from 0.609 (0.601–0.616) to 0.646 (0.639–0.654) (p&lt;0.001). Conclusions Lymphopenia is associated with increased risk for long-term mortality in patients undergoing coronary angiography, regardless of coronary presentation. High RDW may enhance the predictive ability of lymphopenia. Lymphocyte count and mortality risk Funding Acknowledgement Type of funding source: None

scholarly journals The relationship between socioeconomic position and health literacy among urban and rural adults in regional China

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Wei Chen ◽  
Hongfu Ren ◽  
Na Wang ◽  
Yaqing Xiong ◽  
Fei Xu
Keyword(s):  
Health Literacy ◽  
Educational Attainment ◽  
Socioeconomic Position ◽  
Population Based ◽  
Outcome Variable ◽  
Average Income ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Logistic Regression Models ◽  
Rural Adults

Abstract Background To examine associations of socioeconomic position (SEP), separately indicated by education, monthly family average income (FAI) and occupation, with health literacy (HL) among adults in regional China. Methods A cross-sectional survey was conducted among urban and rural adults (aged 25–69 years) who were randomly selected, using the probability proportionate to size sampling approach, from Nanjing municipality of China during October and December of 2016. HL, the outcome variable, was assessed using the Chinese Resident Health Literacy Scale. SEP, our independent variable, was separately measured with educational attainment, monthly family average income and occupation. Logistic regression models were introduced to examine SEP-HL association with odds ratio (OR) and 95% confidence interval (CI). Results Totally, 8698 participants completed the survey. The proportion of participants with unweighted and weighted adequate HL was 18.0% (95%CI = 17.2, 18.8%) and 19.9% (95%CI = 16.6, 23.6%), respectively, in this study. After adjustment for possible confounding factors, each SEP indicator was in significantly positive relation to both unweighted and weight HL level. Participants who obtained 13+ and 10–12 years educational attainment, respectively, had 2.41 (95%CI = 1.60, 3.64) and 1.68 (95%CI = 1.23, 2.29) times odds to record weighted adequate HL compared to their counterparts who were with 0–9 years education. Subjects within upper (OR = 1.92, 95%CI = 1.24, 2.98) and middle FAI tertile (OR = 1.59, 95%CI = 1.19, 2.13), respectively, were more likely to report weighted adequate HL relative to those who were within lower FAI tertile. White collars were more likely to have weighted adequate HL (OR = 1.33, 95%CI = 1.09, 1.61) than blue collars. Conclusions Each of education, FAI and occupation was positively associated with health literacy among urban and rural adults in China. The findings have important implications that different SEP indicators can be used to identify vulnerable residents in population-based health literacy promotion campaigns.

scholarly journals Violence and discrimination among Ugandan residents during the COVID-19 lockdown

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Elizabeth Katana ◽  
Bob Omoda Amodan ◽  
Lilian Bulage ◽  
Alex R. Ario ◽  
Joseph Nelson Siewe Fodjo ◽  
...  
Keyword(s):  
Law Enforcement ◽  
Control Measures ◽  
Sub Saharan Africa ◽  
World Health ◽  
Vulnerable Groups ◽  
Transport Systems ◽  
Outcome Variable ◽  
Cross Sectional ◽  
Factors Associated ◽  
The Past

Abstract Background In March 2020, the World Health Organization (WHO) declared COVID-19 a pandemic. Many countries in Sub-Saharan Africa, Uganda inclusive, implemented lockdowns, curfew, banning of both private and public transport systems, and mass gatherings to minimize spread. Social control measures for COVID-19 are reported to increase violence and discrimination globally, including in Uganda as some may be difficult to implement resulting in the heavy deployment of law enforcement. Media reports indicated that cases of violence and discrimination had increased in Uganda’s communities following the lockdown. We estimated the incidence and factors associated with experiencing violence and discrimination among Ugandans during the COVID-19 lockdown to inform control and prevention measures. Methods In April 2020, we conducted a secondary analysis of cross-sectional data under the International Citizen Project (ICP) to assess adherence to public health measures and their impact on the COVID-19 outbreak in Uganda. We analyzed data on violence and discrimination from the ICP study. We performed descriptive statistics for all the participants’ characteristics and created a binary outcome variable called experiencing violence and/or discrimination. We performed logistic regression analysis to identify the factors associated with experiencing violence and discrimination. Results Of the 1726 ICP study participants, 1051 (58.8%) were males, 841 (48.7%) were currently living with a spouse or partner, and 376 (21.8%) had physically attended work for more than 3 days in the past week. Overall, 145 (8.4%) experienced any form of violence and/or discrimination by any perpetrator, and 46 (31.7%) of the 145 reported that it was perpetrated by a law enforcement officer. Factors associated with experiencing violence or discrimination were: being male (AOR = 1.60 CI:1.10–2.33), having attended work physically for more than 3 days in the past week (AOR = 1.52 CI:1.03–2.23), and inability to access social or essential health services since the epidemic started (AOR = 3.10 CI:2.14–4.50). Conclusion A substantial proportion of Ugandan residents experienced violence and/or discrimination during the COVID-19 lockdown, mostly perpetrated by law enforcement officers. We recommend mitigation of the collateral impact of lockdowns with interventions that focus on improving policing quality, ensuring continuity of essential services, and strengthening support systems for vulnerable groups including males.

Determinants of housing demand in the Erzurum province, Turkey

2014 ◽  
Vol 7 (4) ◽  
pp. 586-602 ◽  
Author(s):  
Erkan Oktay ◽  
Abdulkerim Karaaslan ◽  
Ömer Alkan ◽  
Ali Kemal Çelik
Keyword(s):  
Housing Prices ◽  
Binary Logistic Regression ◽  
Housing Demand ◽  
Outcome Variable ◽  
Binary Logistic Regression Analysis ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Content Type ◽  
Comprehensive Survey ◽  
Income Expectations

Purpose – The main aim of this study is to determine the factors that influence the housing demand of households in Erzurum, northeastern Turkey. Housing demand is generally affected by several factors including housing prices, individuals’ income, expectations and choices and so on, as a means of its demographic and socio-psychological contexts. Design/methodology/approach – A questionnaire-based cross-sectional survey was carried out, in which the outcome variable had binary responses such as whether to invest in housing or not. A binary logistic regression analysis was performed to estimate the underlying data. Findings – The questionnaire was conducted in 2,927 households living in Erzurum city center, and 47 per cent of the respondents claimed that they would consider investing in housing in the future. The estimation results reveal that demographic or socio-economic factors that may possibly influence housing demand of the respondents are as follows: household head’s and spouse’s occupation, monthly income, the number of individuals in the family and car ownership. Originality/value – This paper involves the most comprehensive survey addressing the housing demand in the East Anatolian Region, Turkey. Additionally, this paper aims to contribute to the existing housing literature through establishing the statistical analysis of housing demand in an unstudied territory of the world.

Excessive Daytime Sleepiness and Associated Factors in Military Search and Rescue Personnel

2021 ◽  
Vol 92 (12) ◽  
pp. 975-979
Author(s):  
Rokshana Akter ◽  
Tricia L. Larose ◽  
Jannicke Sandvik ◽  
Vivianne Fonne ◽  
Anders Meland ◽  
...  
Keyword(s):  
Excessive Daytime Sleepiness ◽  
Daytime Sleepiness ◽  
Associated Factors ◽  
Lifestyle Factors ◽  
Search And Rescue ◽  
Outcome Variable ◽  
Study Cohort ◽  
Contributing Factors ◽  
Cross Sectional ◽  
Rescue Personnel

BACKGROUND: Abnormal excessive daytime sleepiness (EDS) has been reported worldwide, but too little is known about EDS and its determinants in Search and Rescue (SAR) populations. We aimed to determine the prevalence of abnormal EDS and contributing factors among Royal Norwegian Air Force (RNoAF) SAR helicopter personnel.METHODS: In this cross-sectional study, a total of N = 175 RNoAF SAR personnel completed an electronic survey including socio-demographic and lifestyle questions. The Epworth Sleepiness Scale (ESS) was used as both a continuous and categorical outcome variable to measure EDS.RESULTS: Abnormal EDS defined by ESS was found in 41% of the participants in this study. We observed no associations between socio-demographic and lifestyle factors and abnormal EDS in this study. DISCUSSION: There is a high prevalence of abnormal EDS in the current RNoAF SAR population. Despite this elevated level of fatigue, we did not find that the socio-demographic and lifestyle factors assessed in this study were associated with abnormal EDS in RNoAF SAR helicopter personnel. Also unusually, the study cohort did not demonstrate higher scores in factors found to change ESS scores in similar study populations (e.g., caffeine use, tobacco use, exercise level). Further research is required to investigate other factors (organizational, operational) that may be associated with abnormal EDS in this and other SAR populations.Akter R, Larose TL, Sandvik J, Fonne V, Meland A, Wagstaff AS. Excessive daytime sleepiness and associated factors in military search and rescue personnel. Aerosp Med Hum Perform. 2021; 92(12):975–979.

scholarly journals Media use and excess body weight among women in Nigeria: a cross-sectional study

BMJ Open ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. e020802 ◽  
Author(s):  
Bishwajit Ghose ◽  
Sanni Yaya
Keyword(s):  
Body Weight ◽  
Weight Status ◽  
Media Use ◽  
Multivariable Analysis ◽  
Overweight And Obesity ◽  
Outcome Variable ◽  
Excess Body Weight ◽  
Demographic And Health Surveys ◽  
Adult Women ◽  
Cross Sectional

ObjectivesTo investigate the (1) time trends in body mass index (BMI) and (2) relationship between media use and body weight status among adult women in Nigeria. We hypothesise that higher frequency of media use is associated with higher likelihood of being overweight and obesity among adult women.Study designCross-sectional.SettingUrban and rural settings in Nigeria.ParticipantsAdult non-pregnant women aged between 15 and 49 years.MethodsData were derived from Nigeria Demographic and Health Surveys conducted in 2003, 2008 and 2013. The outcome variable was excess body weight (overweight and obesity), and main explanatory variables were frequency of reading newspaper, listening to radio and television (TV) viewing. Datasets were merged to perform pooled analysis, and were analysed using bivariate and multivariable regression techniques.ResultsOf the 69 401 participants, 16.2% had a BMI of 25.0–29.9 kg/m2(95% CI 15.8 to 16.6) and 6.6% had >30 kg/m2(95% CI 6.3 to 6.9). Between 2003 and 2013, the prevalence of overweight women increased by 4.1%, and that of obesity by 2.2%. Overall, radio was the most popular media followed by TV and newspaper. Respectively, 15.6% and 11.7% of the women reported using radio and TV almost every day and 30.6% and 25.1% at least once a week. In multivariable analysis, watching TV almost every day and at least once a week were associated with, respectively, 1.6 and 1.2 times higher odds of being overweight, and 2.7 and 1.5 times higher odds of being obese compared with those who never used radio. Similarly, significant associations were observed for newspaper and radio use as well.ConclusionThe prevalence of overweight and obesity is noticeably high among Nigerian women and has been increasing steadily over the past decade. A statistically significant association exists between BMI and the use of newspaper, radio and TV. Further studies are required to develop a better understanding of the mechanisms that underlie this relationship.

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