scholarly journals Risk Factors for Intraoperative Pressure Injury in Aortic Surgery: A Nested Case-Control Study

2020 ◽  
Author(s):  
Yao Dong
Keyword(s):  
Risk Factors ◽  
High Risk ◽  
Conditional Logistic Regression ◽  
Aortic Surgery ◽  
Case Control ◽  
Control Group ◽  
Single Factor ◽  
Increased Risk ◽  
Pressure Injury ◽  
Nested Case Control

Aims and Objectives: The aim of this study was to identify risk factors associated with an increased risk of intraoperativepressure injury in patients undergoing aortic surgery.Background: Intraoperative pressure injuries are some of the most significant health problems in clinical practice.According to previous studies, patients undergoing aortic surgery are at high risk of developing an intraoperative pressure injury, with an incidence much higher than that associated with other types of cardiac surgery.Design: This was a nested case-control study.Methods: Following the STROBE checklist, a nested case-control approach was adopted in this study. A patient cohort was selected on the basis of inclusion and exclusion criteria from patients undergoing aortic surgery. Data were collected from these patients by means of a tailored questionnaire designed in-house. Patients with intraoperative pressure injury at the end of surgery were identified as the case group, while the control group consisted of patients without intraoperative pressure injury. Patients in the groups underwent 1:1 matching based on age and sex. Initially,a single-factor analysis was conducted between the two groups. Subsequently, risk factors for intraoperative pressureinjury were identified through conditional logistic regression analysis with use of the variables that exhibited statisticallysignificant differences in the single-factor analysis.Results: A total of 400 patients were selected. Among these, 167 patients experienced intraoperative pressure injury at an incidence rate of 41.8%. Strict preoperative bed confinement, deep hypothermic circulatory arrest during surgery,application of norepinephrine or dopamine during surgery, and intraoperative skin wetting were associated with theoccurrence of intraoperative pressure injury in patients undergoing aortic surgery.Conclusions: Nurses should thoroughly assess the risk of intraoperative pressure injury and implement appropriatepreventative interventions, particularly in high-risk patients undergoing aortic surgery.

scholarly journals Risk factors for methicillin-resistantStaphylococcus aureusbacteraemia differ depending on the control group chosen

2013 ◽  
Vol 141 (11) ◽  
pp. 2376-2383 ◽  
Author(s):  
M. POGORZELSKA-MAZIARZ ◽  
E. Y. FURUYA ◽  
E. L. LARSON
Keyword(s):  
Risk Factors ◽  
Staphylococcus Aureus ◽  
Organ Transplant ◽  
Severity Of Illness ◽  
Venous Catheter ◽  
Case Control ◽  
Control Group ◽  
Major Organ ◽  
Independent Risk Factors ◽  
Nested Case Control

SUMMARYMethicillin-resistantStaphylococcus aureus(MRSA) bacteraemia cause significant morbidity and mortality in hospitalized patients. Using a nested case-control design, 204 MRSA bacteraemia cases were compared to 301 unmatched methicillin-susceptibleStaphylococcus aureus(MSSA) bacteraemia controls and were matched 1:2 with non-infected controls. The independent risk factors for MRSA bacteraemia compared to MSSA bacteraemia were older age (P = 0·048), major organ transplant during current hospital stay (P = 0·016) and quinolone use (P = 0·016). Cases were more likely than non-infected controls to have renal failure (P = 0·003), cirrhosis (P = 0·013), and a central venous catheter (P = 0·003) after controlling for other risk factors. This large case-control study made it possible to assess risk factors for MRSA bacteraemia using two sets of controls and showed that risk factors differed greatly depending on the control group chosen. These results confirm the need for careful selection of appropriate control groups and the need to carefully adjust for underlying severity of illness.

Association between statin use and the risks of glaucoma in Australia: a 10-year cohort study

2021 ◽  
pp. bjophthalmol-2021-318789
Author(s):  
Yixiong Yuan ◽  
Wei Wang ◽  
Xianwen Shang ◽  
Ruilin Xiong ◽  
Jason Ha ◽  
...  
Keyword(s):  
Large Scale ◽  
Conditional Logistic Regression ◽  
Control Group ◽  
Case Group ◽  
Conditional Logistic Regression Model ◽  
The People ◽  
Increased Risk ◽  
Nested Case Control ◽  
Statin Use

SynopsisIn a cohort of middle-aged and elderly Australians, we found that long-term statin use was associated with a higher risk of glaucoma onset. As to subtypes of statins, the increased risk was only found in rosuvastatin users.PurposeTo investigate the relationship between statin use and glaucoma onset in a 10-year longitudinal study.MethodsThis nested case–control study was based on data from a large-scale cohort of Australians aged over 45 years old. Medication exposure was identified by claims records from the Pharmaceutical Benefits Scheme during the follow-up period (2009–2016). The onset of glaucoma was defined as the people with at least three claims of antiglaucoma medications. Controls matched by age, gender and cardiovascular diseases were selected from participants without prescription of antiglaucoma medications. A conditional logistic regression model was used to assess the association between statin use and glaucoma onset.ResultsThe proportion of statin users was higher in the case group (40.5%) than that in the control group (38.4%). After adjusting for baseline characteristics and longitudinal claims records, statin use was not associated with glaucoma onset (OR 1.04, 95% CI 0.97 to 1.11). However, an increased risk of glaucoma onset was observed in participants with a longer duration of statin use (>3 years vs <1 year: OR 1.12, 95% CI 1.04 to 1.21). With respect to specific types of statins, participants taking rosuvastatin were more likely to suffer from glaucoma (OR 1.11, 95%CI 1.01 to 1.22). The use of other statins was not significantly associated with glaucoma onset.ConclusionsLong-term statin use was found to be associated with a higher risk of glaucoma onset in this study. Regarding specific types of statins, the increased risk of glaucoma onset was only observed in users of rosuvastatin.

scholarly journals Risk of osteoporosis and fragility fractures in asthma due to oral and inhaled corticosteroids: two population-based nested case-control studies

Thorax ◽  
2020 ◽  
Vol 76 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Christos V Chalitsios ◽  
Dominick E Shaw ◽  
Tricia M McKeever
Keyword(s):  
Cumulative Dose ◽  
Inhaled Corticosteroids ◽  
Conditional Logistic Regression ◽  
Fragility Fractures ◽  
Case Control ◽  
Practice Research ◽  
Clinical Practice Research Datalink ◽  
Case Control Studies ◽  
Increased Risk ◽  
Nested Case Control

BackgroundInhaled (ICS) and oral (OCS) corticosteroids are used widely in asthma; however, the risk of osteoporosis and fragility fracture (FF) due to corticosteroids in asthma is not well-established.MethodsWe conducted two nested case-control studies using linked data from the Clinical Practice Research Datalink (CPRD) and Hospital Episode Statistics (HES) databases. Using an asthma cohort, we separately identified patients with osteoporosis or FF and gender-, age- and practice-matched controls. Conditional logistic regression was used to determine the association between ICS and OCS exposure, and the risk of osteoporosis or FF. The prevalence of patients receiving at least one bisphosphonate was also calculated.ResultsThere was a dose–response relationship between both cumulative dose and number of OCS/ICS prescriptions within the previous year, and risk of osteoporosis or FF. After adjusting for confounders, people receiving more OCS prescriptions (≥9 vs 0) had a 4.50 (95% CI 3.21 to 6.11) and 2.16 (95% CI 1.56 to 3.32) increased risk of osteoporosis and FF, respectively. For ICS (≥11 vs 0) the ORs were 1.60 (95% CI 1.22 to 2.10) and 1.31 (95% CI 1.02 to 1.68). The cumulative dose had a similar impact, with those receiving more OCS or ICS being at greater risk. The prevalence of patients taking ≥9 OCS and at least one bisphosphonate prescription was just 50.6% and 48.4% for osteoporosis and FF, respectively.ConclusionsThe findings suggest that exposure to OCS or ICS is an independent risk factors for bone health in patients with asthma. Steroid administration at the lowest possible level to maintain asthma control is recommended.

scholarly journals Risk Factors of Postoperative Shivering at Post Anesthesia Care Unit in Normothermic Patients Underwent General Anesthesia

2021 ◽  
Author(s):  
Laortip Rattanapittayaporn ◽  
Maliwan Oofuvong
Keyword(s):  
Risk Factors ◽  
General Anesthesia ◽  
Core Temperature ◽  
Conditional Logistic Regression ◽  
Control Group ◽  
Anesthesia Care ◽  
Post Anesthesia Care Unit ◽  
Emergency Case ◽  
Increased Risk ◽  
Duration Of Surgery

Objective: The aim of study was to identify risk factors that can be modified to reduce incidence of postoperative shivering in normothermic patient who underwent general anesthesia.Material and Methods: A retrospective case control study was conducted between January 2017 and August 2018 by assessing the anesthetic records of normothermic patients at a post anesthesia care unit who underwent general anesthesia. A control group of 201 patients was randomly matched with 201 cases by age (±5 years) and site of surgery. Medical records were reviewed for data including patient demographics, operative time, anesthetic medication, type of fluid, core temperature at the end of surgery and occurrence of postoperative shivering. Conditional logistic regression analysis was performed to assess the association between potential risk factors and postoperative shivering.Results: Higher body mass index (BMI) [odds ratio (OR) 0.91, 95% confidence interval (CI) 0.87-0.96] and higher core temperature at end of surgery (OR 0.33 95% CI 0.18-0.63) are associated with reduced risk of postoperative shivering. Whereas emergency case compared with elective case (OR 3.06 95% CI 1.63-5.72) and longer duration every 10 minutes (OR 1.05 95% CI 1.03-1.08) are associated with an increased risk of postoperative shivering.Conclusion: Emergency case, longer duration of surgery, lower BMI and lower core temperature at end of surgery were significantly associated with postoperative shivering.

scholarly journals Is Opium Use Associated with an Increased Risk of Lung Cancer? A Case-Control Study

2020 ◽  
Author(s):  
Ahmad Naghibzadeh Tahami ◽  
Maryam Marzban ◽  
Vahid Yazdi Feyzabadi ◽  
Shahryar Dabiri ◽  
Shokrollah Mohseni ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Case Control Study ◽  
Conditional Logistic Regression ◽  
Daily Intake ◽  
Case Control ◽  
Control Group ◽  
Related Risk ◽  
Increased Risk ◽  
Control Study ◽  
Opium Use

Abstract Background: In recent years, lung cancer (LC) incidence has increased in Iran. The use of opium and its derivatives (O&D) has increased as well. This study aimed to investigate the association between the use of O&D and LC incidence.Methods: In this case-control study conducted in Kerman, Iran; 140 patients with lung cancer and 280 healthy controls matched by age, sex, and place of residence were included. Data, including O&D use, cigarette smoking, alcohol use, and diet, were collected using a structured questionnaire. The relation between the use of O&D and LC was evaluated using conditional logistic regression adjusted for tobacco smoking, education, daily intake of fruit, vegetables, red meat, and hydrogenated fats.Results: Opium ever-use was associated with an increased risk of LC (Adjusted Odds Ratio (AOR) =5.95, 95 % CI: 1.87 -18.92). Participants were divided into low and high use groups based on the median of opium use in the control group. A significant dose-response relation was observed between the amount of daily O&D use and LC; and the relation was stronger in high users (AOR low users = 3.81 % CI: 1.13 -12.77 and OR high users= 9.36, 95% CI: 2.05 -42.72). Also, LC was higher among participants starting the use of O&D at younger ages (≤ 41 years old vs never users AOR = 8.64, 95 % CI: 1.90 -39.18) compared to those who started at an older age ( >41 years old vs never users, AOR = 4.71, 95 % CI: 1.38 - 16.08). The association between opium, and lung cancer among non-smokers was OR: 6.50 (95% CI: 2.89 to 14.64).Conclusion: The results of this study show that opium use is probably a dose related risk factor for lung cancer.

scholarly journals Associations of Bisphenol Exposure With The Risk of Gestational Diabetes Mellitus: A Nested Case-Control Study In Guangxi, China

2021 ◽  
Author(s):  
Peng Tang ◽  
Jun Liang ◽  
Qian Liao ◽  
Huishen Huang ◽  
Xiaojing Guo ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Gestational Diabetes ◽  
Gestational Diabetes Mellitus ◽  
Case Control Study ◽  
Conditional Logistic Regression ◽  
Case Control ◽  
Negatively Associated ◽  
Increased Risk ◽  
Nested Case Control ◽  
Control Study

Abstract A growing number of epidemiologic studies have estimated the associations between endocrine-disrupting chemicals and gestational diabetes mellitus (GDM). However, reports on the association between bisphenol A (BPA) substitutes and GDM are limited. This investigation aimed to explore the associations of maternal serum BPA, bisphenol B (BPB), bisphenol F (BPF), bisphenol S (BPS), and tetrabromobisphenol A (TBBPA) with the risk of GDM. A nested case-control study was performed among 500 pregnant women. Associations between the serum bisphenol levels and the risk of GDM were assessed by conditional logistic regression analysis and two-mixture modeling approaches (Bayesian kernel machine regression [BKMR] and quantile g-computation). BPA and TBBPA were negatively associated with the risk of GDM in the adjusted models, respectively. Intermediate BPS levels were associated with increased odds (OR: 1.84; 95% CI: 1.04, 3.27) of GDM compared with the low concentration groups only based on the single-bisphenol models. Associations between BPA, BPS, and TBBPA with the risk of GDM were also found in the BKMR analysis. The quantile g-computation (OR: 0.55; 95% CI: 0.43, 0.69) and BKMR models revealed a statistically significant and negative joint effect of the five bisphenols on the risk of GDM. This study demonstrates the association between exposure to BPS with the increased risk of GDM. In addition, exposure to BPA and TBBPA were associated with the reduced risk of GDM. Moreover, exposure to the mixture of the five bisphenols was negatively associated with the risk of GDM.

scholarly journals Risk Factors for Falls in Hospital In-Patients: A Prospective Nested Case Control Study

2019 ◽  
Vol 8 (5) ◽  
pp. 300-306 ◽  
Author(s):  
Zhila Najafpour ◽  
Zahra Godarzi ◽  
Mohammad Arab ◽  
Mehdi Yaseri
Keyword(s):  
Risk Factors ◽  
Length Of Stay ◽  
Case Control Study ◽  
Case Control ◽  
Patient Falls ◽  
Increased Risk ◽  
Risk Factors For Falls ◽  
Clinical Records ◽  
Nested Case Control ◽  
Control Study

Background: Patient falls are considered a challenge to the patient’s safety in hospitals, which, in addition to increasing the length of stay and costs, may also result in severe injuries or even the death of the patient. This study aims to investigate the associations between risk factors among fallers in comparison with the control group. Methods: A prospective nested case control study was performed on 185 patients who fell and 1141 controls were matched with the patients at risk of fall in the same ward and during the same time. This study was conducted in a university educational hospital in Tehran with 800 beds during a 9-month period. The data included demographics, comorbidities, admission details, types of medication, clinical conditions, and activities before or during the fall. The data was collected from clinical records, hospital information system, error reporting system and observations, and the interviews with the fallers, their families and care givers (physicians, nurses, etc). Data analysis was conducted through time-based matching using a multi-level analysis. Results: In a multilevel model including patient-related, medication, and care-related variables, the factors that were significantly associated with an increased risk of patient falls included: longer length of stay (odds ratio [OR] = 1.01; CI=0.32 to 0.73), using chemotherapy drugs, sedatives, anticonvulsants, benzodiazepines, and angiotensin-converting enzyme (ACE) inhibitors, visual acuity (OR=6.93; CI=4.22 to 11.38), balance condition (OR= 6.41; CI=4.51 to 9.11), manual transfer aid (OR=8.47; CI=5.65 to 12.69), urinary incontinence (OR= 8.47, CI= 5.65 to 12.69), and cancer (OR=2.86, CI=1.84-4.44). These factors were found to be associating with more odds for a falling accident among patients. Several characteristics such as fall history (OR=0.48; CI= 1.003 to 1.02), poly-pharmacy (OR=1.37, CI=00.85 to 2.2), stroke (OR=0.94, CI= 0.44 to 2.02), and nurse to patient ratio (incidence rate ratio=1.01, CI=0.01 to 0.03) were not significantly associated with falling in hospitals. Conclusion: It seems that a combination of both patient-related factors and history of medication should be considered. Moreover, modifiable clinical characteristics of patients such as vision improvement, provision of manual transfer aid, diabetes control, regular toilet program, and drug modification should be considered during the formulation of interventions.

scholarly journals Risk factors for bleeding in haemato-oncology patients—a nested case–control study: The BITE study protocol (Bleeding In Thrombocytopenia Explained)

BMJ Open ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. e034710 ◽  
Author(s):  
Loes L Cornelissen ◽  
Camila Caram-Deelder ◽  
Johanna G van der Bom ◽  
Rutger A Middelburg ◽  
Jaap Jan Zwaginga
Keyword(s):  
Risk Factors ◽  
Case Control Study ◽  
Conditional Logistic Regression ◽  
Case Control ◽  
Source Population ◽  
Bleeding Events ◽  
Oncological Patients ◽  
Nested Case Control ◽  
And Control ◽  
Control Study

IntroductionHaemato-oncological patients often receive platelet count driven prophylactic platelet transfusions to prevent bleeding. However, many prophylactically transfused patients still bleed. More knowledge on risk factors for bleeding is therefore needed. This will enable identification of bleeding risk profiles on which future transfusion policy can be optimised. The present BITE study (Bleeding In Thrombocytopenia Explained) aims to identify clinical conditions and biomarkers that are associated with clinically relevant bleeding events.Methods and analysisA matched case–control study nested in a cohort of haemato-oncological patients in the Netherlands. We collect a limited number of variables from all eligible patients, who together form the source population. These patients are followed for the occurrence of clinically relevant bleeding. Consenting patients of the source population form the cohort. Cases from the cohort are frequency matched to selected control patients for the nested case–control study. Of both case and control patients more detailed clinical data is collected.Study populationAdult haemato-oncological patients, who are admitted for intensive chemotherapeutic treatment or stem cell transplantation, or who received such treatments in the past and are readmitted for disease or treatment-related adverse events.Statistical analysisBleeding incidences will be calculated for the total source population, as well as for different subgroups. The association between potential risk factors and the occurrence of bleeding will be analysed using conditional logistic regression, to account for matching of case and control patients.Ethics and disseminationThe study was approved by the Medical Research Ethics Committee Leiden Den Haag and Delft, and the Radboudumc Committee on Research Involving Human Subjects. Approval in seven other centres is foreseen. Patients will be asked for written informed consent and data is coded before analyses, according to Dutch privacy law. Results will be published in peer-reviewed journals.Trial registration numberNL62499.058.17. NCT03505086; Pre-results.

scholarly journals Traditional and Commercial Alcohols as Risk Factors for Esophageal Cancer in Tanzania

2020 ◽  
Vol 6 (Supplement_1) ◽  
pp. 36-36
Author(s):  
Alexandra Keir ◽  
Geoffrey Buckle ◽  
Larry Akoko ◽  
William Mgisha ◽  
Julius Mwaiselage ◽  
...  
Keyword(s):  
Risk Factors ◽  
Esophageal Cancer ◽  
Case Control Study ◽  
Conditional Logistic Regression ◽  
Secondary Analysis ◽  
Case Control ◽  
First Case ◽  
Increased Risk ◽  
Context Specific ◽  
Control Study

PURPOSE Esophageal cancer (EC) is one of the most common cancers in East Africa; however, risk factors that underly the high incidence in this region are not well understood. We aimed to investigate the association between exposure to specific alcohol subtypes and EC in Tanzania. METHODS We performed a secondary analysis of data from a hospital-based, case-control study conducted at Muhimbili National Hospital and Ocean Road Cancer Institute in Dar es Salaam, Tanzania. Cases of EC were identified between 2014 and 2016. Hospital controls were identified from patients with nonmalignant conditions and matched 1:1 for gender and age (± 10 years). Interviews were conducted using a survey with culturally relevant and context-specific questions on alcohol and smoking exposure. Conditional logistic regression analyses were applied to evaluate specific associations of potential exposures and EC. RESULTS A total of 473 EC cases and 473 controls were enrolled. Alcohol consumption was reported in 61% and 64% of cases and controls, respectively. Neither ‘current use of alcohol (any type)’, nor ‘ever use’ were associated with EC; however, local brew consumption was associated with increased EC risk (odds ratio [OR], 2.01; 95% CI, 1.53 to 2.66; P < .01). Increased risk was observed with consumption of gongo (OR, 2.91), komoni (OR, 2.41), wanzuki (OR, 2.40), kindi (OR, 3.13), and kangara (OR, 2.86). Smoking increased EC risk; however, it did not significantly modify the association between EC and alcohol subtypes. CONCLUSION This is the first case-control study to report a detailed analysis of alcohol exposures as a potential risk factor for EC in Tanzania. Although combined measures of alcohol use were not found to be associated with EC, several types of locally brewed alcohols emerged as risk factors. Additional research is needed to investigate these findings and examine the carcinogenic role of ingredients and/or contaminants, as well as any interactions with other putative risk factors in this region.

Abstract 17246: Risk Factors for Major Bleeding Events in Rivaroxaban Users With Atrial Fibrillation: A Nested Case-control Study

Circulation ◽  
2015 ◽  
Vol 132 (suppl_3) ◽  
Author(s):  
Sally Tamayo ◽  
Jason Simeone ◽  
Beth Nordstrom ◽  
Manesh Patel ◽  
Zhong Yuan ◽  
...  
Keyword(s):  
Risk Factors ◽  
Atrial Fibrillation ◽  
Major Bleeding ◽  
Index Date ◽  
Conditional Logistic Regression ◽  
Management Strategies ◽  
Case Control ◽  
Incidence Density ◽  
Bleeding Events ◽  
Nested Case Control

Introduction: Rivaroxaban is a novel oral anticoagulant indicated to reduce the risk of stroke and systemic embolism in patients with non-valvular atrial fibrillation (NVAF). Anticoagulation therapies carry a risk of major bleeding (MB), for which patient characteristics may play a role. Methods: Using data obtained from the Department of Defense (DoD), we examined risk factors for MB within a cohort of rivaroxaban-treated patients with NVAF using a nested case-control design. Cases with MB were selected by a validated claims-based algorithm that approximates the definition of MB used in clinical trials. Incidence density sampling was used to identify 5 controls without MB for each case. Controls had the same year of entry into the cohort and were at risk for a MB event at the time of each matched case’s event (index date). Potential risk factors for MB included demographic characteristics and comorbidities from the 12 months prior to the index date. Odds ratios (OR) and 95% confidence intervals (CI) were calculated from multivariable conditional logistic regression models to identify risk factors for bleeding. Results: Among 542 MB cases and 2,710 controls, MB cases were older and had more comorbidities (Table 1). Based on the multivariable modeling, increased age, anemia, prior gastrointestinal bleeding, heart failure, and vascular disease were identified as the strongest risk factors for MB (p<0.0001 for all). Conclusions: Several risk factors for MB were identified, although some findings may be affected by unmeasured confounding effects. These risk factors may assist in the development of clinical management strategies.

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