scholarly journals An outbreak of Norwalk-like viral gastroenteritis in holidaymakers travelling to Andorra, January–February 2002

2003 ◽  
Vol 8 (1) ◽  
pp. 1-8 ◽  
Author(s):  
B Pedalino ◽  
E Feely ◽  
P McKeown ◽  
B Foley ◽  
B Smyth ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Cohort Study ◽  
Water Consumption ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Risk Exposure ◽  
Viral Gastroenteritis ◽  
Preliminary Results

A retrospective cohort study was conducted to investigate an outbreak of Norwalk-like viral gastroenteritidis that occurred in Irish holidaymakers visiting Andorra, in January–February 2002. Preliminary results showed the risk exposure was higher for tourists who stayed in Soldeu and consumed ice cubes in their drinks (OR = 2.5, 95% CI [1.3–4.6)], after logistic regression and adjusting for sex and water consumption).

scholarly journals 387. Markers for Mortality in COVID-19 Patients with Atrial Fibrillation or Flutter

2020 ◽  
Vol 7 (Supplement_1) ◽  
pp. S262-S262
Author(s):  
Kok Hoe Chan ◽  
Bhavik Patel ◽  
Iyad Farouji ◽  
Addi Suleiman ◽  
Jihad Slim
Keyword(s):  
Atrial Fibrillation ◽  
Logistic Regression ◽  
Cohort Study ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Prognostic Markers ◽  
Univariate Analysis ◽  
Laboratory Data ◽  
Significant Difference ◽  
New Onset

Abstract Background Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection can lead to many different cardiovascular complications, we were interested in studying prognostic markers in patients with atrial fibrillation/flutter (A. Fib/Flutter). Methods A retrospective cohort study of patients with confirmed COVID-19 and either with existing or new onset A. Fib/Flutter who were admitted to our hospital between March 15 and May 20, 2020. Demographic, outcome and laboratory data were extracted from the electronic medical record and compared between survivors and non-survivors. Univariate and multivariate logistic regression were employed to identify the prognostic markers associated with mortality in patients with A. Fib/Flutter Results The total number of confirmed COVID-19 patients during the study period was 350; 37 of them had existing or new onset A. Fib/Flutter. Twenty one (57%) expired, and 16 (43%) were discharged alive. The median age was 72 years old, ranged from 19 to 100 years old. Comorbidities were present in 33 (89%) patients, with hypertension (82%) being the most common, followed by diabetes (46%) and coronary artery disease (30%). New onset of atrial fibrillation was identified in 23 patients (70%), of whom 13 (57%) expired; 29 patients (78%) presented with atrial fibrillation with rapid ventricular response, and 2 patients (5%) with atrial flutter. Mechanical ventilation was required for 8 patients, of whom 6 expired. In univariate analysis, we found a significant difference in baseline ferritin (p=0.04), LDH (p=0.02), neutrophil-lymphocyte ratio (NLR) (p=0.05), neutrophil-monocyte ratio (NMR) (p=0.03) and platelet (p=0.015) between survivors and non-survivors. With multivariable logistic regression analysis, the only value that had an odds of survival was a low NLR (odds ratio 0.74; 95% confidence interval 0.53–0.93). Conclusion This retrospective cohort study of hospitalized patients with COVID-19 demonstrated an association of increase NLR as risk factors for death in COVID-19 patients with A. Fib/Flutter. A high NLR has been associated with increased incidence, severity and risk for stroke in atrial fibrillation patients but to our knowledge, we are first to demonstrate the utilization in mortality predictions in COVID-19 patients with A. Fib/Flutter. Disclosures Jihad Slim, MD, Abbvie (Speaker’s Bureau)Gilead (Speaker’s Bureau)Jansen (Speaker’s Bureau)Merck (Speaker’s Bureau)ViiV (Speaker’s Bureau)

scholarly journals Lasting s-ketamine block of spreading depolarizations in subarachnoid hemorrhage: a retrospective cohort study

Critical Care ◽  
2019 ◽  
Vol 23 (1) ◽  
Author(s):  
Edgar Santos ◽  
Arturo Olivares-Rivera ◽  
Sebastian Major ◽  
Renán Sánchez-Porras ◽  
Lorenz Uhlmann ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Cohort Study ◽  
Subarachnoid Hemorrhage ◽  
Regression Model ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Logistic Regression Model ◽  
Poisson Model ◽  
High Dose ◽  
First Line

Abstract Objective Spreading depolarizations (SD) are characterized by breakdown of transmembrane ion gradients and excitotoxicity. Experimentally, N-methyl-d-aspartate receptor (NMDAR) antagonists block a majority of SDs. In many hospitals, the NMDAR antagonist s-ketamine and the GABAA agonist midazolam represent the current second-line combination treatment to sedate patients with devastating cerebral injuries. A pressing clinical question is whether this option should become first-line in sedation-requiring individuals in whom SDs are detected, yet the s-ketamine dose necessary to adequately inhibit SDs is unknown. Moreover, use-dependent tolerance could be a problem for SD inhibition in the clinic. Methods We performed a retrospective cohort study of 66 patients with aneurysmal subarachnoid hemorrhage (aSAH) from a prospectively collected database. Thirty-three of 66 patients received s-ketamine during electrocorticographic neuromonitoring of SDs in neurointensive care. The decision to give s-ketamine was dependent on the need for stronger sedation, so it was expected that patients receiving s-ketamine would have a worse clinical outcome. Results S-ketamine application started 4.2 ± 3.5 days after aSAH. The mean dose was 2.8 ± 1.4 mg/kg body weight (BW)/h and thus higher than the dose recommended for sedation. First, patients were divided according to whether they received s-ketamine at any time or not. No significant difference in SD counts was found between groups (negative binomial model using the SD count per patient as outcome variable, p = 0.288). This most likely resulted from the fact that 368 SDs had already occurred in the s-ketamine group before s-ketamine was given. However, in patients receiving s-ketamine, we found a significant decrease in SD incidence when s-ketamine was started (Poisson model with a random intercept for patient, coefficient − 1.83 (95% confidence intervals − 2.17; − 1.50), p < 0.001; logistic regression model, odds ratio (OR) 0.13 (0.08; 0.19), p < 0.001). Thereafter, data was further divided into low-dose (0.1–2.0 mg/kg BW/h) and high-dose (2.1–7.0 mg/kg/h) segments. High-dose s-ketamine resulted in further significant decrease in SD incidence (Poisson model, − 1.10 (− 1.71; − 0.49), p < 0.001; logistic regression model, OR 0.33 (0.17; 0.63), p < 0.001). There was little evidence of SD tolerance to long-term s-ketamine sedation through 5 days. Conclusions These results provide a foundation for a multicenter, neuromonitoring-guided, proof-of-concept trial of ketamine and midazolam as a first-line sedative regime.

scholarly journals Pre-Existing Lymphopenia Increases the Risk of Hospitalization and Death after SARS-CoV-2 Infection

2022 ◽  
Vol 14 (1) ◽  
pp. 20-25
Author(s):  
Riccardo Garbo ◽  
Francesca Valent ◽  
Gian Luigi Gigli ◽  
Mariarosaria Valente
Keyword(s):  
Risk Factors ◽  
Logistic Regression ◽  
Cohort Study ◽  
General Population ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Logistic Regression Model ◽  
Protective Factor ◽  
Absolute Lymphocyte Count ◽  
Limited Information

There is limited information regarding the severity of COVID-19 in immunocompromized patients. We conducted a retrospective cohort study considering the period from 1 March 2020 to 31 December 2020 to determine whether previously existing lymphopenia increases the risk of hospitalization and death after SARS-CoV-2 infection in the general population. The laboratory and hospital discharge databases of the Azienda Sanitaria Universitaria Friuli Centrale were used, and 5415 subjects infected with SARS-CoV-2 and with at least one recent absolute lymphocyte count determination before SARS-CoV-2 positivity were included. In total, 817 (15.1%) patients had severe COVID-19. Patients developing severe COVID-19 were more frequently males (44.9% of the severe COVID-19 group vs. 41.5% in the non-severe COVID-19 group; p < 0.0001) and were older (73.2 ± 13.8 vs. 58.4 ± 20.3 years; p < 0.0001). Furthermore, 29.9% of the lymphopenic patients developed severe COVID-19 vs. 14.5% of the non-lymphopenic patients (p < 0.0001). In a logistic regression model, female sex remained a protective factor (OR = 0.514, 95%CI 0.438–0.602, p < 0.0001), while age and lymphopenia remained risk factors for severe COVID-19 (OR = 1.047, 95%CI 1.042–1.053, p < 0.0001 for each additional year of age; OR = 1.715, 95%CI 1.239–2.347, p = 0.0011 for lymphopenia). This provides further information to stratify the risk of COVID-19 severity, which may be an important element in the management of immunosuppressive therapies.

scholarly journals Impact of Blood Urea Nitrogen and Creatinine Levels on Maternal and Fetal Outcomes of Pregnancy: a Retrospective Cohort Study

2021 ◽  
Author(s):  
Guifang Deng ◽  
Lanlan Wu ◽  
Yao Liu ◽  
Zengyou Liu ◽  
Hengying Chen ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Cohort Study ◽  
Blood Urea Nitrogen ◽  
Retrospective Cohort Study ◽  
Pregnancy Outcomes ◽  
Retrospective Cohort ◽  
Fetal Outcomes ◽  
Urea Nitrogen ◽  
The Third ◽  
Fourth Quartile

Abstract Background: Blood urea nitrogen (BUN) and creatinine (SCr) are associated with gestational diabetes mellitus (GDM). However, there were limited data in the literature on the influence of BUN and SCr on maternal and fetal outcomes of pregnancy. We aimed to examine the association of BUN and SCr levels during gestation with the risk of selected adverse pregnancy outcomes.Methods: This retrospective cohort study included 1606 singleton mothers aged 22-44 years. Both BUN and SCr levels were collected and measured during the second (16-18th week), third (28-30th week) trimesters of gestation respectively and followed up pregnancy outcomes. Statistical analysis was used multivariate logistic regression. Results: In the multivariate adjusted logistic regression model, the highest level of SCr in the second trimester increased the risk of PROM by 45% (95% CI, 1.01-2.09). In the third trimester of gestation, compared with those in the lowest quartile, BUN levels in the highest quartile decreased the risk of macrosomia and LGA by 60%(95% CI, 0.20-0.78), 66%(95% CI, 0.21,0.55) , respectively, and increased the risk of SGA by 137%(1.06, 5.31), 186%(1.29,6.34) in the third and fourth quartiles, respectively. The adjusted OR (95%CI) for macrosomia in the fourth quartile was 0.46 (0.24, 0.87), for SGA in the third quartiles was 2.36 (1.10, 5.10), and for LGA in the fourth quartile was 0.61 (0.41,0.91) compared with those in the first quartile of SCr levels. The elevated changes of BUN (> 0.64mmol/L) was the risk factor of SGA (OR: 2.11, 95%CI: 1.03,4.32).Conclusion: Higher BUN and SCr levels during the 28-30th week of gestation even those towards the upper limit of the normal range can act as a warning sign of the impending SGA. Elevated changes of BUN and SCr during pregnancy also associated with the lower birth weight.

scholarly journals Cryptococcal meningitis in a tertiary hospital in Pretoria, mortality and risk factors – A retrospective cohort study

2016 ◽  
Vol 28 (5) ◽  
pp. 480-485 ◽  
Author(s):  
J Hiesgen ◽  
C Schutte ◽  
S Olorunju ◽  
J Retief
Keyword(s):  
Risk Factors ◽  
Logistic Regression ◽  
Cohort Study ◽  
Antiretroviral Therapy ◽  
Mortality Risk ◽  
Retrospective Cohort Study ◽  
Cryptococcal Meningitis ◽  
Retrospective Cohort ◽  
Nausea And Vomiting ◽  
People Living With Hiv

Aim This retrospective cohort study analyzes the impact of possible risk factors on the survival chance of patients with cryptococcal meningitis. These factors include the patient’s socio-economic background, age, gender, presenting symptoms, comorbidities, laboratory findings and, in particular, non-adherence versus adherence to therapy. Methods Data were collected from all adult patients admitted to Kalafong Hospital with laboratory confirmed cryptococcal meningitis over a period of 24 months. We analyzed the data by the presentation of descriptive summary statistics, logistic regression was used to assess factors which showed association between outcome of measure and factor. Furthermore, multivariable logistic regression analysis using all the factors that showed significant association in the cross tabulation was applied to determine which factors had an impact on the patients’ mortality risk. Results A total of 87 patients were identified. All except one were HIV-positive, of which 55.2% were antiretroviral therapy naïve. A history of previous tuberculosis was given by 25 patients (28.7%) and 49 (56.3%) were on tuberculosis treatment at admission or started during their hospital stay. In-hospital mortality was 31%. Statistical analysis showed that antiretroviral therapy naïve patients had 9.9 (CI 95% 1.2–81.2, p < 0.0032) times greater odds of dying compared to those on antiretroviral therapy, with 17 from 48 patients (35.4%) dying compared with 1 out of 21 patients (4.8%) on treatment. Defaulters had 14.7 (CI 95% 1.6–131.6, p < 0.016) times greater odds of dying, with 9 from 18 patients dying (50%), compared to the non-defaulters. In addition, patients who presented with nausea and vomiting had a 6.3 (95% CI 1.7–23.1, p < 0.005) times greater odds of dying (18/47, 38.3%); this remained significant when adjusted for antiretroviral therapy naïve patients and defaulters. Conclusion Cryptococcal meningitis is still a common opportunistic infection in people living with HIV/AIDS resulting in hospitalization and a high mortality. Defaulting antiretroviral therapy and presentation with nausea and vomiting were associated with a significantly increased mortality risk.

scholarly journals Development of a preoperative index-based nomogram for the prediction of hypokalemia in patients with pituitary adenoma: a retrospective cohort study

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11650
Author(s):  
Wenpeng Li ◽  
Lexiang Zeng ◽  
Deping Han ◽  
Shanyi Zhang ◽  
Bingxi Lei ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Regression Analysis ◽  
Cohort Study ◽  
Pituitary Adenoma ◽  
Logistic Regression Analysis ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Close Monitoring ◽  
Training Set ◽  
Nonlinear Association

Objective To develop and validate a preoperative index-based nomogram for the prediction of hypokalemia in patients with pituitary adenoma (PA). Methods This retrospective cohort study included 205 patients with PAs between January 2013 and April 2020 in the Sun Yat-sen Memorial Hospital, Guangzhou, China. The patients were randomly classified into either a training set (N = 143 patients) and a validation set (N = 62 patients) at a ratio of 7:3. Variables, which were identified by using the LASSO regression model were included for the construction of a nomogram, and a logistic regression analysis was used to calculate odds ratios (ORs) and 95% confidence intervals (CIs) in the training set. The area under the curve (AUC) was used to evaluate the performance of the nomogram for predicting hypokalemia. Multivariate logistic regression analysis with a restricted cubic spline analysis was conducted to identify a potential nonlinear association between the preoperative index and hypokalemia. Results The incidence of hypokalemia was 38.05%. Seven preoperative indices were identified for the construction of the nomogram: age, type of PA, weight, activated partial thromboplastin time, urea, eosinophil percentage, and plateletocrit. The AUCs of the nomogram for predicting hypokalemia were 0.856 (95% CI [0.796–0.915]) and 0.652 (95% CI [0.514–0.790]) in the training and validation sets, respectively. Restricted cubic splines demonstrated that there was no nonlinear association between hypokalemia and the selected variables. Conclusion In this study, we constructed a preoperative indices-based nomogram that can assess the risk of hypokalemia after the surgical treatment of pituitary adenomas. This nomogram may also help to identify high risk patients who require close monitoring of serum potassium.

scholarly journals Surgical trends, outcomes and disparities in minimal invasive surgery for patients with endometrial cancer in England: a retrospective cohort study

BMJ Open ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. e036222
Author(s):  
Esther L. Moss ◽  
George Morgan ◽  
Antony P. Martin ◽  
Panos Sarhanis ◽  
Thomas Ind
Keyword(s):  
Logistic Regression ◽  
Endometrial Cancer ◽  
Cohort Study ◽  
Invasive Surgery ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Black Population ◽  
Minimal Invasive ◽  
Perioperative Morbidity ◽  
Hospital Characteristics

ObjectiveTo examine surgical outcomes and trends in the implementation of minimally invasive surgery (MIS) use for endometrial cancer (EC).DesignRetrospective cohort study.SettingEnglish National Health Service hospitals 2011–2017/2018.Population35 304 patients having a hysterectomy for EC identified from Hospital Episode Statistics.MethodsUnivariate and multivariate analyses compared MIS to open hysterectomy (OH) by assessing the association between demographic, clinical and hospital characteristics by using logistic regression. A propensity score was created, to control for confounding factors including demographics, clinical and hospital characteristics, from a logistic regression which enabled the inverse probability weighting of treatment to be applied in order to compare outcomes of treatment.Main outcome measuresThe association between route of surgery on perioperative morbidity and mortality.ResultsThe MIS rate rose from 40.3% in 2011 to 68.7% in 2017/2018, however, there was significant geographical variation (p<0.001). The overall 90-day mortality was significantly higher with OH versus MIS (OR 0.34, 95% CI 0.18 to 0.62, p=0.0002). MIS rates were significantly lower in patients from the lowest socioeconomic group (LSEG) compared with patients from the highest group (HSEG) (55.4% vs 59.9%, p<0.01), and in the black population as compared with white and Asian populations (40.4% vs 58.6% and 56.0%, p<0.0001). When patients from LSEG and black patients were treated in hospitals with high MIS rates, the MIS rate increased close to that of the HSEG and white patients (81.0% and 74.1% vs 83.2% and 82.6%).ConclusionsFurther investigation is needed to understand the barriers to MIS and improve access so that as many patients as possible can benefit from the reduced morbidity/mortality associated with MIS.

scholarly journals D6 blastocyst transfer on day 6 in frozen-thawed cycles should be avoided: a retrospective cohort study

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Huiling Xu ◽  
Shumin Qiu ◽  
Xiaojing Chen ◽  
Suqin Zhu ◽  
Yan Sun ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Regression Analysis ◽  
Cohort Study ◽  
Logistic Regression Analysis ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Hormone Replacement ◽  
Implantation Rate ◽  
Blastocyst Transfer ◽  
Miscarriage Rate

Abstract Background There is no definitive evidence about the suitable timing to transfer blastocysts formed and cryopreserved on day 6 (D6 blastocysts) in frozen-thawed embryo transfer (FET) cycles. This study aimed to investigate the suitable timing to transfer D6 blastocysts in FET cycles and to identify factors affecting clinical pregnancy rate (CPR) and early miscarriage rate (EMR) in FET cycles with blastocysts. Methods This retrospective cohort study included 1788 FET cycles with blastocysts. There were 518 cycles with D6 blastocysts, and 1270 cycles with blastocysts formed and cryopreserved on day 5 (D5 blastocysts) (D5 group). According to the blastocyst transfer timing, the cycles with D6 blastocysts were divided into cycles with D6 blastocysts transferred on day 5 (D6-on-D5 group, 103 cycles) and cycles with D6 blastocysts transferred on day 6 (D6-on-D6 group, 415 cycles). The chi-square test, independent t-test or Mann-Whitney test, and logistic regression analysis were used for data analysis. Results The CPR and implantation rate (IR) were significantly higher in the D6-on-D5 group than in the D6-on-D6 group (55.3% vs. 37.3%, 44.8% vs. 32.6%, P < 0.01). The CPR and IR were significantly higher in the D5 group than in the D6-on-D5 group (66.0% vs. 55.3%, 62.1% vs. 44.8%, P < 0.05), and the EMR was significantly lower in the D5 group than in the D6-on-D5 group (11.2% vs. 21.1%, P < 0.05). Logistic regression analysis demonstrated that transfer D6 blastocysts on day 5, instead of day 6, could significantly increase the CPR (odds ratio[OR]: 2.031, 95% confidence interval (CI): 1.296–3.182, P = 0.002). FET cycles with D6 blastocysts transferred on day 5 had a higher EMR than those with D5 blastocysts (OR: 2.165, 95% CI: 1.040–4.506, P = 0.039). Hormone replacement therapy (HRT) cycles exhibited a higher EMR than natural cycles (OR: 1.953, 95% CI: 1.254–3.043, P = 0.003), while no difference was observed in the CPR (P > 0.05). Conclusions These results indicate that the suitable timing to transfer D6 blastocysts in FET cycles may be day 5, and D6 blastocyst transfer on day 6 in FET cycles should be avoided. D6 blastocysts transfer and HRT cycles may be associated with a higher EMR.

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