Time-varying population based location management schemes

2003 ◽  
Author(s):  
Huey-Ing Liu ◽  
Chung-Chi Yeh
Keyword(s):  
Location Management ◽  
Population Based ◽  
Time Varying ◽  
Management Schemes ◽  
Varying Population

Intimate Partner Violence and Material Hardship Among Urban Mothers

2019 ◽  
Vol 26 (9) ◽  
pp. 935-954 ◽  
Author(s):  
Julia O’Connor ◽  
Lenna Nepomnyaschy
Keyword(s):  
Intimate Partner Violence ◽  
Physical Abuse ◽  
Partner Violence ◽  
Emotional Abuse ◽  
Fixed Effects ◽  
Population Based ◽  
Intimate Partner ◽  
Time Varying ◽  
Material Hardship ◽  
Urban Mothers

Using a longitudinal population-based sample ( n = 4,234), this study explored the association of intimate partner violence (IPV) with material hardship. We found that women who experienced IPV are substantially more likely to experience material hardship, even after controlling for a comprehensive set of static and time-varying characteristics, including material hardship at the prior wave and individual fixed effects. Associations were strongest for experiences of physical abuse (the least prevalent type of IPV) and controlling abuse (the most prevalent type of IPV) but were weaker for emotional abuse. Results suggest that IPV increases the probability of material hardship by 10-25%.

Increased risk of cancer in patients with retinal vein occlusion: a 12-year nationwide cohort study

2020 ◽  
pp. bjophthalmol-2020-316947
Author(s):  
Min Seok Kim ◽  
Joon Hee Cho ◽  
Seong Jun Byun ◽  
Chang-Mo Oh ◽  
Kyu Hyung Park ◽  
...  
Keyword(s):  
Retinal Vein Occlusion ◽  
Cox Regression ◽  
Subsequent Development ◽  
Population Based ◽  
Control Group ◽  
Time Varying ◽  
Vein Occlusion ◽  
Increased Risk ◽  
Risk Of Cancer ◽  
Subsequent Cancer

AimsTo investigate the association between incident retinal vein occlusion (RVO) and the subsequent development of cancer.MethodsIn this nationwide population-based retrospective study using 2002–2013 National Health Insurance Service database which covers the entire South Korean population, 186 701 incident RVO patients and their 1:1 propensity-score matched controls were included. We defined the fixed cohort from January 1st, 2004 to December 31st, 2013; the cohort included patients who suffered incident RVO after entering the cohort and their matched controls, and excluded patients having any cancer history before entering the cohort. The association of RVO and cancer was assessed by time-varying covariate Cox regression models; Model 1 included RVO as a time-varying covariate, Model 2 included Model 1 plus demographic information and Model 3 included Model 2 and comorbidities.ResultsRVO was associated with an increased risk of subsequent cancer (HR=1.29; 95% CI, 1.26–1.31 in Model 1), which was consistent in Models 2 and 3. The incidence rate of overall cancer during the study period was 25.55 (95% CI, 25.19–25.91) per 1000 person-years in the RVO group and 18.62 (95% CI, 18.46–18.79) per 1000 person-years in the control group. In the subgroup analysis, haematological malignancies showed the highest association with RVO (HR=1.65; 95% CI, 1.49–1.83).ConclusionPatients with RVO have an increased risk of subsequent cancer development even after adjusting for demographic factors and comorbidities. Further study is warranted to elucidate these associations to provide proper recommendations for RVO patients regarding the cancer screening.

scholarly journals Mortality and Revascularization among Myocardial Infarction Patients with Schizophrenia: A Population-Based Cohort Study

2020 ◽  
Vol 65 (7) ◽  
pp. 454-462 ◽  
Author(s):  
Tanya S. Hauck ◽  
Ning Liu ◽  
Harindra C. Wijeysundera ◽  
Paul Kurdyak
Keyword(s):  
Myocardial Infarction ◽  
Coronary Revascularization ◽  
Artery Bypass ◽  
Bypass Graft ◽  
Coronary Intervention ◽  
Population Based ◽  
Geographic Region ◽  
Time Varying ◽  
The Impact ◽  
The Relationship

Background: Cardiovascular disease is a major source of mortality in schizophrenia, and access to care after acute myocardial infarction (AMI) is poor for these patients. Aims: To understand the relationship between schizophrenia and access to coronary revascularization and the impact of revascularization on mortality among individuals with schizophrenia and AMI. Method: This study used a retrospective cohort of AMI in Ontario between 2008 and 2015. The exposure was a diagnosis of schizophrenia, and patients were followed 1 year after AMI discharge. The primary outcome was all-cause mortality within 1 year. Secondary outcomes were cardiac catheterization and revascularization (percutaneous coronary intervention or coronary artery bypass graft). Cox proportional hazard regression models were used to study the relationship between schizophrenia and mortality, and the time-varying effect of revascularization. Results: A total of 108,610 cases of incident AMI were identified, among whom 1,145 (1.1%) had schizophrenia. Schizophrenia patients had increased mortality, with a hazard ratio (HR) of 1.55 (95% CI, 1.37 to 1.77) when adjusted for age, sex, income, rurality, geographic region, and comorbidity. After adjusting for time-varying revascularization, the HR reduced to 1.38 (95% CI, 1.20 to 1.58). The impact of revascularization on mortality was similar among those with and without schizophrenia (HR: 0.42; 95% CI, 0.41 to 0.44 vs. HR: 0.40; 95% CI, 0.26 to 0.61). Conclusions: In this sample of AMI, mortality in schizophrenia is increased, and treatment with revascularization reduces the HR of schizophrenia. The higher mortality rate yet similar survival benefit of revascularization among individuals with schizophrenia relative to those without suggests that increasing access to revascularization may reduce the elevated mortality observed in individuals with schizophrenia.

scholarly journals Artificial Bee Colony Algorithm with Time-Varying Strategy

2015 ◽  
Vol 2015 ◽  
pp. 1-17 ◽  
Author(s):  
Quande Qin ◽  
Shi Cheng ◽  
Qingyu Zhang ◽  
Li Li ◽  
Yuhui Shi
Keyword(s):  
Swarm Intelligence ◽  
Artificial Bee Colony Algorithm ◽  
Artificial Bee Colony ◽  
Experimental Studies ◽  
Population Based ◽  
Time Varying ◽  
Abc Algorithm ◽  
Bee Colony ◽  
Linear And Nonlinear ◽  
Proper Balance

Artificial bee colony (ABC) is one of the newest additions to the class of swarm intelligence. ABC algorithm has been shown to be competitive with some other population-based algorithms. However, there is still an insufficiency that ABC is good at exploration but poor at exploitation. To make a proper balance between these two conflictive factors, this paper proposed a novel ABC variant with a time-varying strategy where the ratio between the number of employed bees and the number of onlooker bees varies with time. The linear and nonlinear time-varying strategies can be incorporated into the basic ABC algorithm, yielding ABC-LTVS and ABC-NTVS algorithms, respectively. The effects of the added parameters in the two new ABC algorithms are also studied through solving some representative benchmark functions. The proposed ABC algorithm is a simple and easy modification to the structure of the basic ABC algorithm. Moreover, the proposed approach is general and can be incorporated in other ABC variants. A set of 21 benchmark functions in 30 and 50 dimensions are utilized in the experimental studies. The experimental results show the effectiveness of the proposed time-varying strategy.

scholarly journals Mild anemia and 11- to 15-year mortality risk in young-old and old-old: Results from two population-based cohort studies

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0261899
Author(s):  
Alessia A. Galbussera ◽  
Sara Mandelli ◽  
Stefano Rosso ◽  
Roberto Zanetti ◽  
Marianna Rossi ◽  
...  
Keyword(s):  
Sex Education ◽  
Mortality Risk ◽  
Age Groups ◽  
Population Based ◽  
Adverse Outcomes ◽  
Smoking History ◽  
Time Varying ◽  
Mild Anemia ◽  
Time Varying Covariates ◽  
Young Old

Background Mild anemia is a frequent although often overlooked finding in old age. Nevertheless, in recent years anemia has been linked to several adverse outcomes in the elderly population. Objective of the study was to investigate the association of mild anemia (hemoglobin concentrations: 10.0–11.9/12.9 g/dL in women/men) with all-cause mortality over 11–15 years and the effect of change in anemia status on mortality in young-old (65–84 years) and old-old (80+ years). Methods The Health and Anemia and Monzino 80-plus are two door-to-door, prospective population-based studies that included residents aged 65-plus years in Biella municipality and 80-plus years in Varese province, Italy. No exclusion criteria were used. Results Among 4,494 young-old and 1,842 old-old, mortality risk over 15/11 years was significantly higher in individuals with mild anemia compared with those without (young-old: fully-adjusted HR: 1.35, 95%CI, 1.15–1.58; old-old: fully-adjusted HR: 1.28, 95%CI, 1.14–1.44). Results were similar in the disease-free subpopulation (age, sex, education, smoking history, and alcohol consumption adjusted HR: 1.54, 95%CI, 1.02–2.34). Both age groups showed a dose-response relationship between anemia severity and mortality (P for trend <0.0001). Mortality risk was significantly associated with chronic disease and chronic kidney disease mild anemia in both age groups, and with vitamin B12/folate deficiency and unexplained mild anemia in young-old. In participants with two hemoglobin determinations, seven-year mortality risk was significantly higher in incident and persistent anemic cases compared to constant non-anemic individuals in both age groups. In participants without anemia at baseline also hemoglobin decline was significantly associated with an increased mortality risk over seven years in both young-old and old-old. Limited to the Monzino 80-plus study, the association remained significant also when the risk was further adjusted also for time-varying covariates and time-varying anemia status over time. Conclusions Findings from these two large prospective population-based studies consistently suggest an independent, long-term impact of mild anemia on survival at older ages.

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