Infection In Elderly Patients Research Articles

Living in symbiosis with COVID: two delayed presentations of soft tissue infections in elderly patients with COVID-19 infection

Retroperitoneal and extensive breast abscesses in elderly patients are associated with a significant burden of comorbidities, insidious symptoms, and signs resulting in delayed diagnosis. We present two elderly COVID-19-positive patients with retroperitoneal and breast abscesses. Both patients underwent multiple procedures and , despite a protracted course, survived each two potentially lethal infections. A 72-year-old man presented to the emergency department (ED) with back pain. Labs showed a polymerase chain reaction (PCR)-positive COVID-19 test and leukocytosis. A computed tomography scan of the abdomen and pelvis (CTAP) showed a perirectal abscess spreading into the pelvis and retroperitoneum. The patient underwent an incision and drainage (I and D). Additional imaging found multiple collections with extension into the retroperitoneum. These were drained, and the patient was discharged after repeat imaging showed resolution. A 78-year-old female was admitted with swelling of the right breast. Labs showed a positive PCR COVID-19 test, and chest computed tomography (CT) showed a rim-enhancing collection extending from the right breast into the right pectoralis muscle. The patient was started on antibiotics and underwent an I and D of the right breast. She was discharged on post-operative day (POD) four on antibiotics. She was readmitted 32 days later with a left sided abscess overlying the left pectoralis and was successfully treated conservatively with a course of antibiotics. There are few studies on the formation of abscesses in the breast and retroperitoneum in the setting of COVID-19 infection. Thus, information on the topic can aid physicians in maintaining clinical suspicion of severe abscesses illness in elderly patients presenting with vague clinical symptoms or symptoms concerning soft-tissue infections in the setting of COVID-19 infections

Multi-center study of COVID-19 infection in elderly patients with lymphoma: on behalf of Jiangsu Cooperative Lymphoma Group (JCLG).

Elderly patients with lymphoproliferative diseases (LPD) are vulnerable to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Here, we retrospectively described the clinical features and outcomes of the first time infection of Omicron SARS-CoV-2 in 364 elderly patients with lymphoma enrolled in Jiangsu Cooperative Lymphoma Group (JCLG) between November 2022 and April 2023 in China. Median age was 69years (range 60-92). 54.4% (198/364) of patients were confirmed as severe and critical COVID-19 infection. In univariable analysis, Age > 70years (OR 1.88, p = 0.003), with multiple comorbidities (OR 1.41, p = 0.005), aggressive lymphoma (OR 2.33, p < 0.001), active disease (progressive or relapsed/refractory, OR 2.02, p < 0.001), and active anti-lymphoma therapy (OR 1.90, p < 0.001) were associated with severe COVID-19. Multiple (three or more) lines of previous anti-lymphoma therapy (OR 3.84, p = 0.021) remained an adverse factor for severe COVID-19 in multivariable analysis. Moreover, CD20 antibody (Rituximab or Obinutuzumab)-based treatments within the last 6months was associated with severe COVID-19 in the entire cohort (OR 3.42, p < 0.001). Continuous BTK inhibitors might be protective effect on the outcome of COVID-19 infection (OR 0.44, p = 0.043) in the indolent lymphoma cohort. Overall, 7.7% (28/364) of the patients ceased, multiple lines of previous anti-lymphoma therapy (OR 3.46, p = 0.016) remained an adverse factor for mortality.

New surgery and hospital-diagnosed infections in elderly patients with inflammatory bowel disease undergoing surgery - a nationwide cohort study.

Elderly patients with inflammatory bowel disease (IBD) are fragile in many aspects. Therefore, in these patients, we studied post-operative complications (new abdominal surgery and serious infections after the first IBD surgery). This is a nationwide cohort study based on Danish health registries and included patients with IBD undergoing surgery. The study population was split into ulcerative colitis (UC) and Crohn's disease (CD). The exposed cohort (elderly) constituted those at an age of ≥ 60 years at first IBD surgery, and the unexposed (adults) those with surgery at the age of 18-59 years. We estimated adjusted Hazard Ratios (aHR) of a) new abdominal surgery within 2 years, and b) serious (hospital-diagnosed) infections within 6 and 12 months. We adjusted for several confounders including type of index surgery (laparoscopic or open). The aHR for a new surgery among elderly with UC and CD were 0.69 (95% CI 0.58-0.83) and 0.98 (95% CI 0.83-1.15), respectively. In elderly with UC, the aHRs of infections within 6 and 12 months after surgery were 1.07 (95% CI 0.81- 1.40) and 0.85 (95% CI 0.67-1.08), respectively. In the elderly with CD, the aHRs of infections within 6 and 12 months were 1.45 (95% CI 1.12-1.88) and 1.26 (95% CI 1.00-1.59), respectively. The elderly with IBD did not have an increased risk of new abdominal surgery within two years of the first surgery. Elderly with CD, but not UC, had an increased risk of serious infections within 6 months of surgery.

A Comprehensive Study on the Diagnostic Value of Multi-Slice Computed Tomography for Peripancreatic Infection in Elderly With Severe Acute Pancreatitis.

This study investigated the diagnostic efficacy of multi-slice spiral computed tomography (MSCT) perfusion imaging in evaluating peripancreatic infection in elderly patients with severe acute pancreatitis (SAP). A retrospective analysis was conducted on the clinical data of 110 elderly SAP patients treated at our hospital from March 2018 to August 2019. The study correlated MSCT perfusion imaging characteristics with peripancreatic infection in elderly SAP patients. Additionally, receiver operating characteristic (ROC) curves were constructed to assess the diagnostic performance of MSCT perfusion imaging parameters in evaluating peripancreatic infection in elderly SAP patients. The results indicated that among all 110 elderly SAP patients, the incidence rate of peripancreatic infection was 20.91%, with a mortality rate of 0.91%. MSCT perfusion imaging revealed that after peripancreatic infection in elderly SAP patients, there was a decrease in pancreatic density, local enlargement of the pancreas, blurring of the pancreatic margins, and associated ascites. Compression/narrowing/occlusion of the splenic vein was observed in 22 patients, compression/narrowing/occlusion of the superior mesenteric vein in 17 patients, thickening/thrombosis of the portal vein in 19 patients, and collateral circulation in 21 patients. Compared to elderly SAP patients without peripancreatic infection, those with the infection showed prolonged peak times, reduced peak heights, and decreased blood flow. ROC analysis indicated that the combination of the three parameters (peak time, peak height, and blood flow) had higher specificity and area under the curve (AUC) than single parameters, with no significant difference in sensitivity between the combination and single parameters. In conclusion, combining the three key MSCT perfusion imaging parameters (peak time, peak height, and blood flow) can significantly enhance the predictive efficacy for the risk of peripancreatic infection in elderly SAP patients.

Research progress on the risk factors of peripherally inserted central catheter-related bloodstream infection in elderly patients with malignant tumors

Research progress on the risk factors of peripherally inserted central catheter-related bloodstream infection in elderly patients with malignant tumors

Risk Factors and Outcomes of Community-Acquired Carbapenem-Resistant Klebsiella pneumoniae Infection in Elderly Patients.

The increasing prevalence of carbapenem-resistant Klebsiella pneumoniae (CRKP) infections is a global concern. Elderly patients have a diminished immune response and functional reserve, and are thus more vulnerable to bacterial infection. This study aimed to investigate the risk factors and outcomes in elderly patients with community-acquired CRKP infections. We performed a retrospective cohort study in a tertiary medical center between 1 January 2021, and 31 December 2021. All elderly patients who visited the emergency department during this period with culture-positive K. pneumoniae were enrolled, and their baseline demographics, laboratory profiles, management strategies, and outcomes were recorded and analyzed. We identified 528 elderly patients with K. pneumonia infection, and the proportion of patients with CRKP infection was 10.2% (54/528). Recent intensive care unit (ICU) admission and prior carbapenem use are independent risk factors for CRKP infection in elderly patients. Compared to patients with carbapenem-sensitive K. pneumoniae infection, those with CRKP infection had a significantly higher risk of adverse outcomes, including ICU care, respiratory failure, septic shock, and 90-day mortality. CRKP infection was also identified as an independent risk factor for 90-day mortality. Clinicians should be aware of the increasing prevalence of CRKP infections in elderly patients and judiciously choose appropriate antibiotics for these patients.

Nomogram for predicting surgical site infections in elderly patients after open lumbar spine surgery: A retrospective study.

The aim of this study is to develop a nomogram to assess the risk of surgical site infection in elderly patients undergoing open lumbar spine surgery and explore related risk factors. We reviewed the records of 578 elderly patients who had undergone open lumbar spine surgery. The clinical parameters were subjected to lasso regression and logistic regression analyses. Subsequently, a nomogram was constructed to predict the risk of postoperative surgical site infection and validated using bootstrap resampling. A total of 578 patients were included in the analysis, of which 17 were diagnosed as postoperative surgical site infection. Following the final logistic regression analysis, obesity, hypoalbuminemia and drinking history were identified as independent risk factors and subsequently incorporated into the nomogram. The nomogram demonstrated excellent discrimination, with an area under the receiver-operating characteristic curve of 0.879 (95% CI 0.769 ~ 0.989) after internal validation. The calibration curve exhibited a high level of consistency. Decision curve analysis revealed that this nomogram had greater clinical value when the risk threshold for surgical site infection occurrence was >1% and <89%. We had developed a nomogram for predicting the risk of postoperative surgical site infection in elderly patients who had undergone open lumbar spine surgery. Validation using bootstrap resampling demonstrated excellent discrimination and calibration, indicating that the nomogram may hold potential clinical utility as a simple predictive tool for healthcare professionals.

Risk Factors for Urinary Tract Infection in Elderly Patients with Type 2 Diabetes: A Retrospective Cohort Study.

The risk factors of urinary tract infection in elderly patients with type 2 diabetes were investigated. A total of 72 elderly patients admitted to our hospital from December 2019 to September 2023 because of with type 2 diabetes were retrospectively included. They were divided into the observation group (n = 35) and control group (n = 37) according to whether they had urinary tract infection. The general clinical data, clinical characteristics and the distribution of pathogenic bacteria in the observation group were collected and analysed. Then, t-tests, chi-square tests, regression analysis and receiver operating characteristic curve analysis were conducted. Escherichia coli (E. coli) accounted for 51.43% of the pathogenic bacteria in the observation group, whereas Klebsiella pneumoniae (K. pneumoniae) accounted for 22.86%. The remaining pathogens accounted for 2.86% each. Differences in gender, course of disease, glycosylated haemoglobin and comorbid urinary calculi were found between the groups (p < 0.05); These factors were all risk factors for concurrent urinary infection, and the odds ratios were all >1. The obtained values for gender, disease course, glycosylated haemoglobin and comorbid urinary calculi were respectively 0.594, 0.654, 0.738 and 0.696 (area under the curve); 0.971, 0.714, 0.800 and 0.743 (sensitivity); 0.216, 0.595, 0.676 and 0.649 (specificity); And 0.188, 0.309, 0.476 and 0.392 (Youden index). Common pathogens in elderly people with type 2 diabetes and comorbid urinary tract infection are E. coli and K. pneumoniae. Risk factors include gender, disease duration, glycosylated haemoglobin and urinary stones. The prompt identification of pathogens and risk factors facilitates clinical treatment, reducing infection incidence.

Blood-Stream Infections: Causative Agents, Antibiotic Resistance and Associated Factors in Older Patients.

The rate of multi-drug antibiotic resistance in nosocomial bloodstream infections in elderly patients is increasing. This study examined the data for bloodstream infections to gain a better understanding of bacterial antibiotic resistance. This was a retrospective study of 817 patients with the first positive blood culture between January 1, 2016 and December 31, 2019. Moyen's age was 77.4 ± 9.8 years, male (52.4%) and SOFA 5.0 ± 4. ESBL(+) rate was 78/817 (9.5%). ESBL(+) rate for Escherichia coli and Klebsiella pneumoniae was 69/141 (48.9%) and 9/52 (17.3%), respectively. The most common isolates were Escherichia coli (17.3%), Stenotrophomonas maltophilia (13.7%), and Staphylococcus species (23.1%). The rate of septic shock and mortality accounted for 22.3% and 28.9%, respectively. Escherichia coli is highly sensitive to carbapenem, and resistant (>50%) with quinolone and aminoside. Klebsiella pneumoniae and Pseudomonas aeruginosa were highly sensitive to carbapenem. Acinetobacter baumannii was resistant to meropenem (75%). Stenotrophomonas maltophilia was sensitive to quinolone (13.8 %), and highly resistant to remaining antibiotics. Methicillin-resistant Staphylococcus aureus had a low resistance rate for vancomycin, teicoplanin, and linezolid. Multivariate analysis showed that the significant factors associated with mortality were age >75; SOFA >7; respiratory infection; intensive care unit treatment and presentation with septic shock. The mortality rate was still high, especially for antibiotic-resistant agents.

Serum Interleukin-6 and Serum Ferritin Levels Are the Independent Risk Factors for Pneumonia in Elderly Patients.

Pneumonia is a common infection in elderly patients. We explored the correlations of serum interleukin-6 (IL-6) and serum ferritin (SF) levels with immune function/disease severity in elderly pneumonia patients. Subjects were allocated into the mild pneumonia (MP), severe pneumonia (SP), and normal groups, with their age/sex/body mass index/ disease course and severity/blood pressure/comorbidities/medications/prealbumin (PA)/albumin (ALB)/C-reactive protein (CRP)/procalcitonin (PCT)/smoking status documented. The disease severity was evaluated by pneumonia severity index (PSI). T helper 17 (Th17)/regulatory T (Treg) cell ratios and IL-6/SF/immunoglobulin G (IgG)/Th17 cytokine (IL-21)/Treg cytokine (IL-10)/PA/ALB levels were assessed. The correlations between these indexes/independent risk factors in elderly patients with severe pneumonia were evaluated. There were differences in smoking and CRP/PCT/ALB/PA levels among the three groups, but only CRP/ALB were different between the MP/SP groups. Pneumonia patients exhibited up-regulated Th17 cell ratio and serum IL-6/SF/IL-21/IL-10/IgG levels, down-regulated Treg cell ratio, and greater differences were noted in severe cases. Serum IL-6/SF levels were positively correlated with disease severity, immune function, and IL-21/IL-10/IgG levels. Collectively, serum IL-6 and SF levels in elderly pneumonia patients were conspicuously positively correlated with disease severity and IL-21/IL-10/IgG levels. CRP, ALB, IL-6 and SF levels were independent risk factors for severe pneumonia in elderly patients.

Bacterial Translocation As the Origin of Gram-Negative Rods Bloodstream Infection Among Older Patients in Rural Hospitals: A Cross-Sectional Study.

Introduction Bloodstream infections caused by Gram-negative rods are a pressing concern for the aging global population, particularly in rural settings. This study investigates the prevalence and entry pathways of Gram-negative rod bloodstream infections in elderly patients at a rural Japanese hospital, aiming to clarify the frequency and associated factors of straightforward entry and bacterial translocation. Method In this cross-sectional study, we analyzed electronic medical records of patients over 18 years of age with symptomatic Gram-negative rod bloodstream infections at Unnan City Hospital, Japan, from September 2021 to August 2023. We used multivariate logistic regression to assess factors of age, sex, body mass index, care dependency, and comorbidities. Results Among the participants who met the inclusion criteria, significant differences were observed in age, sex, inpatient status, and prevalence of conditions like respiratory diseases and cancer between the straightforward entry and bacterial translocation groups. Escherichia coli was the most common pathogen identified. Conclusion The study emphasizes the need for tailored medical approaches for elderly patients with bloodstream infections, considering their unique health profiles and risks. It highlights the importance of age, inpatient status, and cancer in determining infection risks, pointing to areas for further research to enhance infection management and healthcare outcomes in older populations.

Profile of Skin Infections in Elderly Patients

Profile of Skin Infections in Elderly Patients

Assessment the awareness of the elderly patient's knowledge and attitudes among influenza vaccination in kingdom of Saudi Arabia 2023

Background: Although influenza vaccination is recommended for people aged 50 and above in Saudi Arabia, and the vaccine is provided free of charge, the elderly influenza vaccination rate is still low, also influenza vaccination reduces rates of pneumonia, hospitalization and mortality, influenza vaccination uptake remains low in older patients. Globally, influenza epidemics cause 3–5 million cases of severe illness and result in a quarter million deaths each year. Despite Saudi Arabia tropical climate, influenza and a significant number of hospitalization's. Influenza vaccination has been shown to reduce influenza‑related hospitalizations and deaths. Patients with an influenza infection are at increased risk of severe illness and complications and have a higher mortality and morbidity rate. Despite the significant role of influenza vaccination in preventing and minimizing the serious complications of influenza infection in elderly patient's. Aim of the study: Assessment the awareness of the elderly patient's knowledge and attitudes among influenza vaccination in kingdom of Saudi Arabia 2023. Methods: This cross-sectional study was conducted among 300 participants from health care centers in Makkah Al-Mokarramah city. A validated self-administered questionnaire was used. It includes questions on socio demographic variables, knowledge, attitude, and vaccine response, during the August to September 2023. Results: shows the majority of participant (47.0%) have average of the knowledge towards influenza vaccination followed by (35.0%) of participant high while Range(2-8) and Mean ±SD(7.011±0.512), X2 38.22 P=0.001also the majority of participant (51.0%) have high of the attitudes towards influenza vaccination followed by (37.0%) of participant average while Range(10-18) and Mean ±SD (15.521±1.755), X2 70.26 P=0.001. Conclusion: The proportion of elderly people aged 50 and above who are willing to receive free influenza vaccine is high in Saudi Arabia. But the level of knowledge about influenza, vaccine and trust in society is low. The government should continue to improve the elderly’s awareness and trust in society through medical staff, family members, television and radio media, and guide the elderly to actively vaccinate against influenza. Effective publicity should be carried out through the above channels to guide the elderly to actively vaccinate against influenza, and a significant number of hospitalization's Keywords: Assessment, Knowledge, attitudes, Patients, PHC, seasonal influenza, Immunization, Saudi Arabia.

Multi-Center Study of COVID-19 Infection in Elderly Patients with Lymphoma: On Behalf of Jiangsu Cooperative Lymphoma Group (JCLG)

Objective: To survey the vaccination status, lymphoma status, characteristics and outcomes of COVID-19 infections in elderly patients with lymphoma in Jiangsu Province of China. Methods: Elderly patients with lymphoma (age≥60 years) in Jiangsu Province was investigated by questionnaire and telephone follow-up during December 2022 to June 2023. Basic information, Lymphoma status, comorbidities, vaccination, severity and outcome of COVID-19 infection were collected. Results: A total of 402 patients were followed up in this study, 364 were confirmed with COVID-19 infection during December 2022 to June 2023. Among these patients, median age was 70 years (range 60-92), Of which 50.25% (202/402) were over 70 years old. Most patients (85.9%,313/364) were symptomatic at COVID-19 diagnosis. 45.6% (166/364) and 54.4% (198/364) was defined as mild COVID-19 and severe COVID-19 infections according to Diagnosis and treatment plan for COVID -19（trial version 10）in China, all patients with severe COVID-19 infection were hospitalized. 56.0% (204 /364) of patients were aggressive lymphoma and 43.4%(158 /364) were indolent lymphoma. Only 43.9% of the patients had received two or more doses of SARS-CoV-2 vaccine at the onset of COVID-19. In univariable analysis, age &amp;gt;70 years(OR 1.88;95% CI 1.24-2.85,p=0.003), the presence of comorbidities (OR 1.41;95% CI 1.41-1.11,p=0.005), active hematological disease(progressive disease or relapsed/refractory disease, OR 2.02;95% CI 1.53-2.67,P&amp;lt;0.001), ≥2 prior treatment(OR 1.88,95% CI 1.42-2.47,p&amp;lt;0.001), and time from anti-lymphoma treatment to COVID-19 (OR 1.90,95% CI 1.53-2.36,p&amp;lt;0.001) were associated with severe COVID-19 infection in the entire cohort. For anti-lymphoma treatment, anti-CD20-based treatments within the last 6 months was associated with severe COVID-19 infection in the aggressive lymphoma patients (OR 2.17,95% CI 1.21-3.88, p=0.009) as well as in the indolent lymphoma patients (OR 5.67,95% CI 1.97-16.29, p=0.001). Of note, among the indolent lymphoma subsets, only anti-CD20-based maintenance therapy might be a risk factor for exacerbating COVID-19 infection (OR 4.42,95% CI 1.15-17.03,p=0.031), while continuous BTK inhibitors might be protective effect on the outcome when compared with other targeted drugs(OR 0.44,95% CI 0.20-0.97,p=0.043). Overall, 7.7% of patients (28/364) ceased，among them 57.4% (16/28) was due to COVID-19 infection,14.9% (4/28) was due to lymphoma deteriation, 17.9%(5/28) due to COVID-19 infection concurrent with lymphoma progression and 10.7%(3/28) with heart failure . Mortality rate increase by lymphoma status [ Controlled disease: 8.67%(15/173) ; Stable disease: 9.80%(5/51);Active disease:16,67%(6/36), p=0.006)], prior lines of anti-lymphoma therapy [1 prior: 7.14%(13/182)；2 prior: 5.26%(3/57);≥3 prior: 25%(9/36), p&amp;lt;0.001] and anti-lymphoma therapy within one month of COVID-19 infection[&amp;gt;1 months: 8.52%(11/129) ;&amp;lt;1 months: 16.67%(17/102); p=0.002]. Conclusions: Elderly patients with lymphoma have a low rate of COVID-19 vaccination and a high rate of severe COVID-19 infection. Patients with active disease, multiple lines of prior therapy, advanced age, multiple comorbidities, and anti-CD20-based treatments within the last 6 months was associated with severe COVID-19 infection..

7295 elderly hospitalized patients with catheter-associated urinary tract infection: a case-control study

BackgroundCatheter-associated urinary tract infection (CAUTI) ranks second among nosocomial infections in elderly patients after lung infections. Improper treatment can lead to death. This study analysed the risk factors, pathogen distribution, clinical characteristics and outcomes of CAUTI in elderly inpatients with a large sample size to provide evidence for clinical prevention and control.MethodsBased on the HIS and LIS, a case‒control study was conducted on all hospitalized patients with indwelling urinary catheters ≥ 60 years old from January 1, 2019, to December 31, 2022, and the patients were divided into the CAUTI group and the non-CAUTI group.ResultsCAUTI occurred in 182 of 7295 patients, and the infection rate was 3.4/per 1000 catheter days. Urine pH ≥ 6.5, moderate dependence or severe dependence in the classification of self-care ability, age ≥ 74 years, male sex, hospitalization ≥ 14 days, indwelling urinary catheter ≥ 10 days, diabetes and malnutrition were independent risk factors for CAUTI (P < 0.05). A total of 276 strains of pathogenic bacteria were detected in urine samples of 182 CAUTI patients at different times during hospitalization. The main pathogens were gram-negative bacteria (n = 132, 47.83%), followed by gram-positive bacteria (n = 91, 32.97%) and fungi (n = 53, 19.20%). Fever, abnormal procalcitonin, positive urinary nitrite and abnormal urination function were the clinical characteristics of elderly CAUTI patients (P < 0.001). Once CAUTI occurred in elderly patients, the hospitalization days were increased by 18 days, the total hospitalization cost increased by ¥18,000, and discharge all-cause mortality increased by 2.314 times (P<0.001).ConclusionThe situation of CAUTI in the elderly is not optimistic, it is easy to have a one-person multi-pathogen infection, and the proportion of fungi infection is not low. Urine pH ≥ 6.5, moderate or severe dependence on others and malnutrition were rare risk factors for elderly CAUTI in previous studies. Our study analysed the clinical characteristics of CAUTI in the elderly through a large sample size, which provided a reliable basis for its diagnosis and identified the adverse outcome of CAUTI.

Relationship Between Dynamic Compliance and Airway Resistance and Infection Indicators in Elderly Patients With Lung Infection After Radiotherapy for Esophageal Cancer

To investigate the performance of using lung dynamic compliance (Cdyn) and airway resistance (RAW) levels to predict lung infection in elderly esophageal cancer patients who have undergone radiotherapy. A total of 298 elderly esophageal cancer patients who received radiotherapy at Shanxi Fenyang Hospital between October 2017 and July 2022 were retrospectively enrolled and their clinical data were collected. The patients were divided into an infection group (124 cases) and a non-infection group (174 cases) according to their status of lung infection. Then, in the infection group, CURB-65 score was used to assess the severity of the patients' lung infection and the patients were further divided into subgroups accordingly, with 36 cases in the mild infection subgroup, 58 cases in the moderate infection subgroup, and 30 cases in the severe infection subgroup. The levels of Cdyn, RAW, and infection indicators, including serum procalcitonin (PCT), interleukin-6 (IL-6), and angiotensin Ⅱ (Ang Ⅱ), were measured in both groups of patients and the differences in the findings were compared between the infection and the non-infection groups and among patients with infection of varying degrees of severity. The correlation between Cdyn and RAW and the levels of PCT, IL-6, and Ang Ⅱ was analyzed. Receiver operating characteristic (ROC) curve was used to evaluate the performance of predicting infection with Cdyn and RAW. The Cdyn level of patients in the infection group was lower than that of patients in the non-infection group, while the RAW level of the infection group was higher than that of the non-infection group (P<0.05). Among the infection subgroup, the level of Cdyn of the mild infection subgroup was higher than those of the moderate and severe infection subgroups, while the levels of RAW, PCT, IL-6, and Ang Ⅱ of the mild infection subgroup were lower than those of the moderate severe subgroups. The level of Cdyn of the moderate infection subgroup was higher than that of the severe infection subgroup, while the RAW, PCT, IL-6, and Ang Ⅱ levels of the moderate infection subgroup were lower than those of the severe infection subgroup, with all difference being statistically significant (P<0.05). The Cdyn level of patients with lung infection was negatively correlated with PCT, IL-6, and Ang Ⅱ levels and the severity of infection (r=-0.501, -0.430, -0.367, and -0.484, respectively, P<0.05), while RAW was positively correlated with PCT, IL-6, and Ang Ⅱ levels and the severity of infection (r=0.483, 0.395, 0.374, and 0.423, respectively, P<0.05). The area under the curve (AUC) of Cdyn and RAW for predicting lung infection in elderly patients with esophageal cancer after radiotherapy were 0.898 (95% confidence interval [CI]: 0.857-0.930) and 0.823 (95% CI: 0.775-0.865), respectively, and the AUC of combined evaluation of Cdyn and RAW was 0.959 (95% CI: 0.930-0.979), which suggested that the predictive performance of combined evaluation was better than evaluation with Cdyn or RAW alone. When elderly esophageal cancer patients develop lung infection after radiotherapy, their Cdyn level is decreased, while the levels of RAW, PCT, IL-6, and Ang Ⅱ are increased. In addition, the levels of Cdyn and RAW are correlated with the PCT, IL-6, and Ang Ⅱ levels. The combined use of Cdyn and RAW shows good performance for predicting lung infection in patients.

Frailty and Adverse Outcomes After SARS-CoV-2 Infection in Elderly Patients on Maintenance Hemodialysis: A Cohort Study.

Frailty is an important geriatric syndrome associated with aging and adverse events, especially in patients with severe infection. To help guide prognosis for elderly patients undergoing maintenance hemodialysis (MHD) who experience acute infection, this study investigated whether baseline (pre-infection) frailty may be associated with adverse outcomes in elderly patients undergoing MHD who suffer SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) infection. Patients (aged ≥60 y) receiving MHD had been assessed for overall frailty and the 5 frailty components based on the Fried Frailty Phenotype scale within 3 months prior to SARS-CoV-2 infection. There were 59 and 98 patients in the frail and non-frail groups, respectively. Three months after SARS-CoV-2 infection, 21 (13.4%) and 45 (28.7%) patients had died or were in hospital. The multivariate COX proportional risk model suggested that the all-cause mortality rate in patients judged overall frail or with low activity was significantly higher compared with that of the non-frail (P = 0.049; 0.003). The multivariate logistic regression analysis showed that hospitalization 3 months after SARS-CoV-2 infection was associated with both overall frailty and low activity (OR 2.276, 95% CI: 1.034-5.010, P = 0.041; OR 2.809, 95% CI: 1.311-6.020, P = 0.008, respectively). Overall frailty and specifically low activity were significantly associated with all-cause mortality and hospitalization in this elderly MHD population after SARS-CoV-2 infection. Early assessment of frailty and effective interventions are recommended to improve the prognosis of patients receiving MHD who are at higher risk of acute infection.

Development and validation of a nomogram for predicting pulmonary infections after Intracerebral hemorrhage in elderly people

ObjectivesThe purpose of this study was to develop and validate a nomogram for the prediction of pulmonary infections in elderly patients with intracerebral hemorrhage (ICH) during hospitalization in the intensive care unit (ICU). MethodsA total of 1183 elderly patients diagnosed with ICH were included from the Medical Information Mart for Intensive Care-IV (MIMIC-IV) database and randomly grouped into training (n=831) and validation (n=352) cohorts. Candidate predictors were identified using the least absolute shrinkage and selection operator (LASSO) regression. Meanwhile, the variables derived from the LASSO regression were included in the multivariate logistic regression analysis, the variables with P < 0.05 were included in the final model and the nomogram was constructed. The discriminatory ability was assessed by plotting the receiver operating curve (ROC) and calculating the area under the curve (AUC). The Performance of the model was assessed by calibration plots and the Hosmer-Lemeshow goodness-of-fit test (HL test). In addition, clinical decision curves assess the net clinical benefit. ResultsThe nomogram included chronic lung disease, dysphagia, mechanical ventilation, use of antibiotics, Glasgow Coma Scale (GCS), Logical Organ Dysfunction System (LODS), blood oxygen saturation (SpO2), white blood cell count (WBC) and prothrombin time (PT). The AUC of the predictive model was 0.905 (95 % CI: 0.877, 0.764) in the training cohort and 0.888 (95 % CI: 0.754, 0.838) in the validation cohort, which showed satisfactory discriminative ability. Second, the nomogram showed good calibration. Decision curve analysis showed that the predictive nomogram was clinically useful. ConclusionA prediction model for predicting pulmonary infections in elderly ICH patients was constructed. The model can help clinicians to identify high-risk patients as soon as possible and prevent the occurrence of pulmonary infections.

Nomogram for Predicting Central Nervous System Infection Following Traumatic Brain Injury in the Elderly

This study aims to identify risk factors for central nervous system (CNS) infection in elderly patients hospitalized with traumatic brain injury (TBI) and to develop a reliable predictive tool for assessing the likelihood of CNS infection in this population. We conducted a retrospective study on 742 elderly TBI patients treated at Tangdu Hospital, China. Clinical data was randomly split into training and validation sets (7:3 ratio). By conducting univariate and multivariate logistic regression analysis in the training set, we identified a list of variables to develop a nomogram for predicting the risk of CNS infection. We evaluated the performance of the predictive model in both cohorts respectively, using Receiver Operating Characteristics (ROC) curves, calibration curves, and Decision Curve Analysis (DCA). Results of the logistic analysis in the training set indicated that surgical intervention (p=0.007), red blood cell (RBC) count (p=0.019), C-reactive protein (CRP) concentration (p<0.001), and cerebrospinal fluid (CSF) leakage (p<0.001) significantly predicted the occurrence of CNS infection in elderly TBI patients. The model constructed based on these variables had high predictive capability (AUC-training=0.832; AUC-validation=0.824) as well as clinical utility. A nomogram constructed based on several key predictors reasonably predicts the risk of CNS infection in elderly TBI patients upon hospital admission. The model of the nanogram may contribute to timely interventions and improve health outcomes among affected individuals.

The prognostic value of red blood cell distribution width for pulmonary infection in elderly patients received abdominal surgery with tracheal intubation and general anesthesia

BackgroundRed blood cell distribution width (RDW) has been shown to be an important predictor of the occurrence of various inflammatory and infectious diseases. However, the predictive value of RDW for pulmonary infection in elderly patients undergoing abdominal surgery under general anesthesia with endotracheal intubation remains unclear. MethodsA total of 200 eligible elderly patients who underwent abdominal surgery with endotracheal intubation and general anesthesia in our hospital from January 2019 to January 2022 were included in this study. During hospitalization, there were 64 cases with different degrees of pulmonary infection, and 136 cases without pulmonary infection. Participants' RDW levels were analyzed on admission. Serum levels of inflammatory factors in infected patients were analyzed during hospitalization. Multivariate logistic analysis was performed to evaluate clinical factors for pulmonary infection during hospitalization following-up abdominal surgery with endotracheal intubation and general anesthesia in elderly patients. Youden's J statistic was used to define the correlation. ResultsRDW at admission was independently associated with the risk of pulmonary infection in elderly patients undergoing general anesthesia with endotracheal intubation for abdominal surgery ([OR 1.952, 95% confidence interval 1.604 to 2.279, p=0.006]). RDW at admission was statistically positively correlated with inflammatory factors, including procalcitonin (p<0.001), C-reactive protein (p<0.001), and tumor necrosis factor-α (p<0.001), in elderly patients with postoperative pneumonia who underwent abdominal surgery. ConclusionRDW at admission had predictive value for pulmonary infection in elderly patients undergoing abdominal surgery under general anesthesia with endotracheal intubation.