scholarly journals The difference in tax evasion amount among various taxpayers’ groups in Russia

2021 ◽  
Vol 62 ◽  
pp. 66-84
Author(s):  
Sergei Belev ◽  
◽  
Konstantin Vekerle ◽  
Anastasiia Evdokimova ◽  
◽  
...  
Keyword(s):  
Propensity Score ◽  
Propensity Score Matching ◽  
Tax Evasion ◽  
Demographic Characteristics ◽  
Small Companies ◽  
Exact Matching ◽  
Individual Income ◽  
Economic Slowdown ◽  
The Difference ◽  
Social Demographic

This paper evaluates tax evasion in Russia through the estimation of individual «income‐consumption» gap. Our analysis is held on the balanced in social‐demographic characteristics subsample of the data of the RLMS of the Higher School of Economics. We reach this by using the combination of propensity score matching and exact matching. Given equal declared income consumption levels of self‐employed and worker from small companies is, on average, higher than for workers from the big ones. This leads to the conclusion that former ones evade 13–31% of their actual income. This result is heterogeneous in year. During the economic slowdown, differences in concealment of income between self‐employed and employees of small and large enterprises become insignificant.

scholarly journals Cost analysis of staged versus simultaneous bilateral total knee and hip arthroplasty using a propensity score matching

BMJ Open ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. e041147
Author(s):  
Ji-Fei Hou ◽  
Chuan Hu ◽  
Yun Zhang ◽  
Li-Qi Tian ◽  
Yan-Zheng Liu ◽  
...  
Keyword(s):  
Blood Transfusion ◽  
Propensity Score ◽  
Propensity Score Matching ◽  
Nursing Care ◽  
Hip Arthroplasty ◽  
Medical Costs ◽  
Complication Rates ◽  
Propensity Score Matching Analysis ◽  
Total Knee ◽  
The Difference

BackgroundTotal joint arthroplasty (TJA), including total knee arthroplasty (TKA) and total hip arthroplasty (THA), is required for many patients. This study aimed to evaluate the medical costs, length of stay (LOS), blood transfusion and in-hospital complications in patients undergoing simultaneous and staged TJA.MethodsAll patients who underwent primary bilateral TJA from 2013 to 2018 in our institute were included. The propensity score matching analysis was performed between simultaneous and staged TJA patients. The difference in medical costs, LOS, blood transfusion and in-hospital complications was compared between simultaneous and staged groups.ResultsExcept for materials fees and general therapy fees, medical costs (bed fees, general therapy fees, nursing care fees, check-up and laboratory test fees, surgical fees and drug fees) were significantly lower in the simultaneous TKA, THA and TJA group. The total average medical costs in simultaneous and staged TKA groups were $15 385 and $16 729 (p<0.001), respectively; THA groups were $14 503 and $16 142 (p=0.016), respectively; TJA groups were $15 389 and $16 830 (p<0.001), respectively. The highest and lowest costs were materials fees and nursing care fees. No significant differences were found for five common comorbidities and postoperative complications between the two subgroups. The simultaneous groups had a shorter LOS and the differences from the staged group for TKA, THA and the TJA group were 8, 6 and 8 days, respectively. The incidence of blood transfusion is higher for simultaneous groups and the difference from the staged group for TKA, THA and TJA is 32.69%, 18% and 29.3%, respectively.ConclusionsOur results indicate that simultaneous TKA and THA with a shorter LOS would cost fewer (costs incurred during hospitalisation) than staged TKA and THA. Complication rates were not affected by the choice for staged or simultaneous arthroplasty, but the incidence of blood transfusion was higher in the simultaneous groups.

scholarly journals Can the Ceftriaxone Breakpoints Be Increased Without Compromising Patient Outcomes?

2018 ◽  
Vol 5 (6) ◽  
Author(s):  
Pranita D Tamma ◽  
Virginia M Pierce ◽  
Sara E Cosgrove ◽  
Ebbing Lautenbach ◽  
Anthony Harris ◽  
...  
Keyword(s):  
Propensity Score ◽  
Propensity Score Matching ◽  
Patient Outcomes ◽  
Nearest Neighbor ◽  
Clinical Laboratory ◽  
Severity Of Illness ◽  
Bloodstream Infections ◽  
Source Control ◽  
Exact Matching ◽  
Extended Spectrum

Abstract Background In 2010, the Clinical Laboratory and Standards Institute recommended a 3-fold lowering of ceftriaxone breakpoints to 1 mcg/mL for Enterobacteriaceae. Supportive clinical data at the time were from fewer than 50 patients. We compared the clinical outcomes of adults with Enterobacteriaceae bloodstream infections treated with ceftriaxone compared with matched patients (with exact matching on ceftriaxone minimum inhibitory concentrations [MICs]) treated with extended-spectrum agents to determine if ceftriaxone breakpoints could be increased without negatively impacting patient outcomes. Methods A retrospective cohort study was conducted at 3 large academic medical centers and included patients with Enterobacteriaceae bacteremia with ceftriaxone MICs of 2 mcg/mL treated with ceftriaxone or extended-spectrum β-lactams (ie, cefepime, piperacillin/tazobactam, meropenem, or imipenem/cilastatin) between 2008 and 2014; 1:2 nearest neighbor propensity score matching was performed to estimate the odds of recurrent bacteremia and mortality within 30 days. Results Propensity score matching yielded 108 patients in the ceftriaxone group and 216 patients in the extended-spectrum β-lactam group, with both groups well-balanced on demographics, preexisting medical conditions, severity of illness, source of bacteremia, and source control interventions. No difference in recurrent bacteremia (odds ratio [OR], 1.16; 95% confidence interval [CI], 0.49–2.73) or mortality (OR, 1.27; 95% CI, 0.56–2.91) between the treatment groups was observed for patients with isolates with ceftriaxone MICs of 2 mcg/mL. Only 6 isolates (1.6%) with ceftriaxone MICs of 2 mcg/mL were extended-spectrum β-lactamase (ESBL)–producing. Conclusions Our findings suggest that patient outcomes are similar when receiving ceftriaxone vs extended-spectrum agents for the treatment of Enterobacteriaceae bloodstream infections with ceftriaxone MICs of 2 mcg/mL. This warrants consideration of adjusting the ceftriaxone susceptibility breakpoint from 1 to 2 mcg/mL, as a relatively small increase in the antibiotic breakpoint could have the potential to limit the use of large numbers of extended-spectrum antibiotic agents.

scholarly journals Impact of Dexmedetomidine On Secondary Hyperparathyroidism Recurrence In Uremic Patients Who Received Parathyroidectomy With Auto-Transplantation: A Retrospective Propensity-Matched Study

2021 ◽  
Author(s):  
Yun Wu ◽  
Wei Han ◽  
Peikun Li ◽  
Xianwen Hu ◽  
Ye Zhang
Keyword(s):  
Quality Of Life ◽  
Propensity Score ◽  
Secondary Hyperparathyroidism ◽  
Propensity Score Matching ◽  
Mechanism Of Action ◽  
Control Group ◽  
Total Parathyroidectomy ◽  
Uremic Patients ◽  
The Difference

Abstract Background: Recurrence of secondary hyperparathyroidism (SHPT) remains a big challenge in uremic patients who underwent total parathyroidectomy with auto-transplantation (tPTX-AT). However, the relationship between perioperative intervention and recurrence of SHPT remains unclear. Dexmedetomidine has been used safely and effectively in uremic patients’ anesthesia. The aim of the study was to explore the effect of dexmedetomidine on the recurrence of SHPT and speculate the possible mechanism of action.Methods: Records of patients who underwent tPTX-AT between 2017 and 2018 were retrospectively analyzed. The study consisted of patients who received dexmedetomidine intra-operatively and the controls were patients who did not receive dexmedetomidine. The primary endpoint was the difference in the recurrence of SHPT one year after surgery between the two groups. The secondary endpoint was health-related quality of life scores. Analysis included propensity score matching and multivariable logistic regression. Results: Of 354 patients, 133 patients received dexmedetomidine intraoperatively, and the total recurrence rate of SHPT was 10.2%. After propensity score matching, patients who received dexmedetomidine had a 3.80-fold decreased risk of SHPT recurrence (odds ratio, 0.263; 95% confidence interval, 0.081 to 0.854; P=0.026) and exhibited a better quality of life in terms of physical functioning and general health, and less emotional role limitations compared with those in control group.Conclusion: In uremic patients who received tPTX-AT, there was an association between dexmedetomidine use and decreased risk of SHPT recurrence. Further studies are needed to accurately assess the effects and mechanism of action of dexmedetomidine on the prognosis of this population.

scholarly journals Treatment of intracranial meningioma with single-session and fractionated radiosurgery: a propensity score matching study

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Sheng-Han Huang ◽  
Chun-Chieh Wang ◽  
Kuo-Chen Wei ◽  
Cheng-Nen Chang ◽  
Chi-Cheng Chuang ◽  
...  
Keyword(s):  
Propensity Score ◽  
Propensity Score Matching ◽  
Local Control ◽  
Local Control Rate ◽  
Intracranial Meningioma ◽  
Single Session ◽  
Benign Meningioma ◽  
Efficient Treatment ◽  
The Difference

Abstract Single-session stereotactic radiosurgery (SSRS) is recognized as a safe and efficient treatment for meningioma. We aim to compare the long-term efficacy and safety of fractionated stereotactic radiotherapy (FSRT) with SSRS in the treatment of grade I meningioma. A total of 228 patients with 245 tumors treated with radiosurgery between March 2006 and June 2017were retrospectively evaluated. Of these, 147 (64.5%) patients were treated with SSRS. The remaining 81 patients (35.5%) were treated with a fractionated technique. Protocols to treat meningioma were classified as 12–16 Gy per fraction for SSRS and 7 Gy/fraction/day for three consecutive days to reach a total dose of 21 Gy for FSRT. In univariate and multivariate analyses, tumor volume was found to be associated with local control rate (hazard ratio = 4.98, p = 0.025). The difference in actuarial local control rate (LCR) between the SSRS and FSRT groups after propensity score matching (PSM) was not statistically significant during the 2-year (96.86% versus 100.00%, respectively; p = 0.175), 5-year (94.76% versus 97.56%, respectively; p = 0.373), and 10-year (74.40% versus 91.46%, respectively; p = 0.204) follow-up period. FSRT and SSRS were equally well-tolerated and effective for the treatment of intracranial benign meningioma during the10-year follow-up period.

scholarly journals Economic burden of IADPSG gestational diabetes diagnostic criteria in China: propensity score matching analysis from a 7-year retrospective cohort

2020 ◽  
Vol 8 (1) ◽  
pp. e001538
Author(s):  
Zonglin He ◽  
Yuan Tang ◽  
Huatao Xie ◽  
Yuchen Lin ◽  
Shangqiang Liang ◽  
...  
Keyword(s):  
Propensity Score ◽  
Gestational Diabetes ◽  
Glucose Tolerance ◽  
Pregnant Women ◽  
Propensity Score Matching ◽  
Retrospective Cohort ◽  
Perinatal Outcomes ◽  
Medical Expenditure ◽  
Iadpsg Criteria ◽  
The Difference

IntroductionThe International Association of Diabetes and Pregnancy Study Group (IADPSG) criteria for gestational diabetes mellitus (GDM) increased the morbidity significantly, but the cost and effectiveness of its application are still unclear. This study aimed to analyze the impact of the IADPSG criteria for diagnosing GDM in China on the perinatal outcomes, and medical expenditure of GDM women versus those with normal glucose tolerance (NGT).Research design and methodsWe conducted a retrospective cohort study involving 7794 women admitted at the First Affiliated Hospital of Jinan University (Guangzhou, China), from November 1, 2010 to October 31, 2017. The perinatal outcomes and medical expenditure were retrieved from the electronic medical records in the hospital. Propensity score matching (PSM, in a 1:1 ratio) algorithm was used to minimize confounding effects on the difference in the two cohorts.ResultsPSM minimized the difference of baseline characteristics between women with and without GDM. Of 7794 pregnant women, half (n=3897) were all of the pregnant women with GDM admitted to the hospital during the period, the other half women had NGT and were selected randomly to match with their counterparts. Adopting the IADPSG criteria was associated with reduced risk of emergency cesarean section, polyhydramnios, turbid amniotic fluid and perineal injury (p<0.01 for all) and having any one of the adverse fetal outcomes (p<0.01), including fetal distress, umbilical cord around the neck, neonatal encephalopathy, admission to neonatal intensive care unit, birth trauma, neonatal hypoglycemia and fetal death. After PSM, the median total medical expenditure by the GDM women was ¥912.9 (US$140.7 in 2015) more than that of the the NGT women (p=0.09).ConclusionsDespite the increasing medical expenditure, screening at 24–28 gestational weeks under the IADPSG guidelines with the 2-hour, 75 g oral glucose tolerance test can improve short-term maternal and neonatal outcomes.

scholarly journals Performance of Matching Methods as Compared With Unmatched Ordinary Least Squares Regression Under Constant Effects

2019 ◽  
Vol 188 (7) ◽  
pp. 1345-1354 ◽  
Author(s):  
Anusha M Vable ◽  
Mathew V Kiang ◽  
M Maria Glymour ◽  
Joseph Rigdon ◽  
Emmanuel F Drabo ◽  
...  
Keyword(s):  
Propensity Score ◽  
Least Squares ◽  
Propensity Score Matching ◽  
Confidence Intervals ◽  
Error Rate ◽  
Type I Error ◽  
Ordinary Least Squares ◽  
Type I ◽  
Exact Matching ◽  
Common Support

AbstractMatching methods are assumed to reduce the likelihood of a biased inference compared with ordinary least squares (OLS) regression. Using simulations, we compared inferences from propensity score matching, coarsened exact matching, and unmatched covariate-adjusted OLS regression to identify which methods, in which scenarios, produced unbiased inferences at the expected type I error rate of 5%. We simulated multiple data sets and systematically varied common support, discontinuities in the exposure and/or outcome, exposure prevalence, and analytical model misspecification. Matching inferences were often biased in comparison with OLS, particularly when common support was poor; when analysis models were correctly specified and common support was poor, the type I error rate was 1.6% for propensity score matching (statistically inefficient), 18.2% for coarsened exact matching (high), and 4.8% for OLS (expected). Our results suggest that when estimates from matching and OLS are similar (i.e., confidence intervals overlap), OLS inferences are unbiased more often than matching inferences; however, when estimates from matching and OLS are dissimilar (i.e., confidence intervals do not overlap), matching inferences are unbiased more often than OLS inferences. This empirical “rule of thumb” may help applied researchers identify situations in which OLS inferences may be unbiased as compared with matching inferences.

scholarly journals Comparison of Two Online Courseware Instructional Methods Using Propensity Score Matching

2019 ◽  
Vol 2 (2) ◽  
pp. 102-116
Author(s):  
Renée Babcock ◽  
Jean Georgiou
Keyword(s):  
Propensity Score ◽  
Propensity Score Matching ◽  
Online Courses ◽  
Consistent Finding ◽  
Face To Face ◽  
Matching Process ◽  
The Difference ◽  
Media Supplements ◽  
Psychology Course ◽  
Matched Samples

This study used propensity score matching to compare two online courseware systems intended for use as supplements to either face-to-face or online courses. One courseware system focused on adaptive features available to students while completing assignments; whereas the other system was an interactive courseware that provided embedded media supplements and assessments. Participants were students enrolled in a psychology course taught by an instructor who used the adaptive courseware in Fall 2013, switching to the interactive courseware in Fall 2015 and 2016. Propensity score matching was used to match students in 2015 with students in 2013. A separate matching process was done for the 2016 versus 2013 students. The use of propensity score matching was successful in allowing comparison across groups. However, the only consistent finding across the two matched samples was that students appeared to spend less time in the interactive courseware than the adaptive courseware. The most likely reason for the difference is a function of the requirements of the two courseware systems.

scholarly journals The Risk of Infective Endocarditis among COVID-19 Patients with Non-Medical Opioid Use

2021 ◽  
pp. 1-6
Author(s):  
Ruchi Bhandari ◽  
R. Constance Wiener ◽  
Christopher Waters ◽  
Cassandra Bambrick ◽  
Ruchi Bhandari
Keyword(s):  
Infective Endocarditis ◽  
Propensity Score ◽  
Propensity Score Matching ◽  
Significant Risk ◽  
Opioid Use Disorder ◽  
Opioid Use ◽  
Web Based ◽  
Objective Evidence ◽  
History Of ◽  
The Difference

Patients with opioid use disorder are more likely to get coronavirus disease 2019 (COVID-19). Cardiovascular diseases frequently present in COVID-19 patients and can increase their susceptibility to invasive infectious diseases, such as infective endocarditis (IE). This study examines the difference in IE incidence following COVID-19 diagnosis between individuals with and without non-medical opioid use. De-identified electronic medical records data were retrieved from TriNetX, a web-based database. Patients in the U.S., aged 18-60 years, with a diagnosis of COVID-19 during January 2020 - January 2021 were included in this study. Development of IE was determined within three months after COVID-19 diagnosis. Logistic regression was conducted to estimate the risk of developing IE between COVID-19 patients with and without opioid use after propensity score matching. COVID-19 patients with non-medical opioid use had 6.8 times the risk of developing IE compared with COVID-19 patients without opioid use (95% CI: 5.44, 8.56; p<0.0001) after propensity score matching. Findings suggest a significant risk of IE among COVID-19 patients with a history of non-medical opioid use. It provides objective evidence to account for baseline opioid use in the risk assessment of IE among COVID-19 patients.

Propensity score matching versus coarsened exact matching in observational comparative effectiveness research

2021 ◽  
Author(s):  
David Guy ◽  
Igor Karp ◽  
Piotr Wilk ◽  
Joseph Chin ◽  
George Rodrigues
Keyword(s):  
Clinical Trials ◽  
Propensity Score ◽  
Propensity Score Matching ◽  
Observational Data ◽  
Randomized Clinical Trials ◽  
Original Data ◽  
Considerable Proportion ◽  
Exact Matching ◽  
Coarsened Exact Matching ◽  
Comparison Groups

Aim & methods: We compared propensity score matching (PSM) and coarsened exact matching (CEM) in balancing baseline characteristics between treatment groups using observational data obtained from a pan-Canadian prostate cancer radiotherapy database. Changes in effect estimates were evaluated as a function of improvements in balance, using results from randomized clinical trials to guide interpretation. Results: CEM and PSM improved balance between groups in both comparisons, while retaining the majority of original data. Improvements in balance were associated with effect estimates closer to those obtained in randomized clinical trials. Conclusion: CEM and PSM led to substantial improvements in balance between comparison groups, while retaining a considerable proportion of original data. This could lead to improved accuracy in effect estimates obtained using observational data in a variety of clinical situations.

scholarly journals Impact of Microcredit on Second Generation Borrowers in Bangladesh: Revisited

2020 ◽  
Vol 21 (1) ◽  
pp. 142-157
Author(s):  
Laila Arjuman Ara ◽  
Mohammad Masudur Rahman ◽  
Chanwahn Kim
Keyword(s):  
Panel Data ◽  
Propensity Score ◽  
Propensity Score Matching ◽  
Selection Bias ◽  
Field Survey ◽  
Poverty Eradication ◽  
Data Set ◽  
The Difference ◽  
The Impact ◽  
The Empirical Analysis

This article investigates the economic impact of continuing borrowers’ participation in the microcredit programme on poverty eradication in Bangladesh. A panel data set was collected through a field survey for the years 2013–2016 to identify the impact of a microcredit programme on continuous participation borrowers. The propensity score matching (PSM) method is used to eliminate selection bias and the difference-in-difference (DID) model is applied for the empirical analysis. The findings of the study demonstrate that more benefits are realized from continued participants compared to discontinued participants. JEL: C83, D14, G21, O12

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