scholarly journals Comparison of ELISA- and SIMOA-based quantification of plasma Aβ ratios for early detection of cerebral amyloidosis

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Steffi De Meyer ◽  
Jolien M. Schaeverbeke ◽  
Inge M. W. Verberk ◽  
Benjamin Gille ◽  
Maxim De Schaepdryver ◽  
...  
Keyword(s):  
Cost Effective ◽  
Cross Sectional Study ◽  
Amyloid Pet ◽  
Demographic Model ◽  
Characteristic Analysis ◽  
Cross Sectional ◽  
Predictive Values ◽  
Cerebral Amyloidosis ◽  
Non Invasive ◽  
Search Trial

Abstract Background Blood-based amyloid biomarkers may provide a non-invasive, cost-effective and scalable manner for detecting cerebral amyloidosis in early disease stages. Methods In this prospective cross-sectional study, we quantified plasma Aβ1–42/Aβ1–40 ratios with both routinely available ELISAs and novel SIMOA Amyblood assays, and provided a head-to-head comparison of their performances to detect cerebral amyloidosis in a nondemented elderly cohort (n = 199). Participants were stratified according to amyloid-PET status, and the performance of plasma Aβ1–42/Aβ1–40 to detect cerebral amyloidosis was assessed using receiver operating characteristic analysis. We additionally investigated the correlations of plasma Aβ ratios with amyloid-PET and CSF Alzheimer’s disease biomarkers, as well as platform agreement using Passing-Bablok regression and Bland-Altman analysis for both Aβ isoforms. Results ELISA and SIMOA plasma Aβ1–42/Aβ1–40 detected cerebral amyloidosis with identical accuracy (ELISA: area under curve (AUC) 0.78, 95% CI 0.72–0.84; SIMOA: AUC 0.79, 95% CI 0.73–0.85), and both increased the performance of a basic demographic model including only age and APOE-ε4 genotype (p ≤ 0.02). ELISA and SIMOA had positive predictive values of respectively 41% and 36% in cognitively normal elderly and negative predictive values all exceeding 88%. Plasma Aβ1–42/Aβ1–40 correlated similarly with amyloid-PET for both platforms (Spearman ρ = − 0.32, p <  0.0001), yet correlations with CSF Aβ1–42/t-tau were stronger for ELISA (ρ = 0.41, p = 0.002) than for SIMOA (ρ = 0.29, p = 0.03). Plasma Aβ levels demonstrated poor agreement between ELISA and SIMOA with concentrations of both Aβ1–42 and Aβ1–40 measured by SIMOA consistently underestimating those measured by ELISA. Conclusions ELISA and SIMOA demonstrated equivalent performances in detecting cerebral amyloidosis through plasma Aβ1–42/Aβ1–40, both with high negative predictive values, making them equally suitable non-invasive prescreening tools for clinical trials by reducing the number of necessary PET scans for clinical trial recruitment. Trial registration EudraCT 2009-014475-45 (registered on 23 Sept 2009) and EudraCT 2013-004671-12 (registered on 20 May 2014, https://www.clinicaltrialsregister.eu/ctr-search/trial/2013-004671-12/BE).

scholarly journals Platelet Count/Spleen Diameter Ratio as a Predictor of Esophageal Varices in Patients with Liver Cirrhosis

2017 ◽  
Vol 15 (2) ◽  
pp. 37-40
Author(s):  
Dipendra Khadka ◽  
Sudhamshu KC ◽  
Sandip Khadka ◽  
Kiran Regmi ◽  
Pooja KC
Keyword(s):  
Liver Cirrhosis ◽  
Platelet Count ◽  
Esophageal Varices ◽  
Complete Blood Count ◽  
Liver Function Tests ◽  
Cross Sectional Study ◽  
Diameter Ratio ◽  
Cross Sectional ◽  
Predictive Values ◽  
Non Invasive

Introduction: Upper gastro-intestinal endoscopy still remains the gold standard for screening of patients suspected to have esophageal varices but not without limitations. So, this study was conducted to access the diagnostic validity and correlation between non-invasive parameters like platelet count, spleen diameter and their ratio with esophageal varices (EV) in patients with liver cirrhosis. Methods: A hospital based descriptive cross-sectional study was carried out in Liver unit of National Academy of Medical Sciences, Bir Hospital, from October 2016 to September 2017. Complete blood count, liver function tests, liver ultrasound and UGI endoscopy were done for all patients included in the study to detect esophageal varices and the platelet count/spleen diameter (PC/SD) ratio was calculated and analyzed to determine whether it can predict the presence of esophageal varices or not. Results: Total patients of liver cirrhosis studied after exclusion were 191 EV was present in 125 patients (65.4%). The platelet count/spleen diameter ratio using a cutoff value of ≤ 909 to detect EV independent of the grade had 93% sensitivity and 100% specificity and positive and negative predictive values of 100% and 91% respectively. Conclusions: PC/SD ratio now can be used as a predictor of presence of esophageal varices in liver cirrhosis.

scholarly journals PLATELET COUNT SQUARED/SPLEEN DIAMETER-ASPARTATE AMINOTRANSFERASE RATIO: NON-INVASIVE METHOD TO PREDICT ESOPHAGEAL VARICES

2017 ◽  
Vol 54 (3) ◽  
pp. 222-224 ◽  
Author(s):  
Ângelo Zambam de MATTOS ◽  
Larissa Faraco DAROS ◽  
Angelo Alves de MATTOS
Keyword(s):  
Logistic Regression ◽  
Platelet Count ◽  
Esophageal Varices ◽  
Predictive Value ◽  
Aspartate Aminotransferase ◽  
Univariate Analysis ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Predictive Values ◽  
Non Invasive

ABSTRACT BACKGROUND - Variceal bleeding has a high mortality among cirrhotics, and screening with endoscopy is indicated at the diagnosis of cirrhosis. Screening with endoscopy implies discomfort, risks and considerable costs. OBJECTIVE - To evaluate platelet count squared/spleen diameter-aspartate aminotransferase ratio (PS/SA), as a non-invasive predictor of esophageal varices in cirrhotics. METHODS - This cross-sectional study evaluated cirrhotics for PS/SA and presence of esophageal varices. Outpatient records of cirrhotic patients were reviewed for the abovementioned data. Sensitivity, specificity, negative and positive predictive values of PS/SA were calculated. After the univariate analysis, variables with P<0.10 were submitted to a logistic regression. RESULTS - The study included 164 cirrhotics, 59.70% male, with a mean age of 56.7 years. Hepatitis C was the most frequent cause of cirrhosis, being present in 90 patients. Patients were classified as Child-Pugh A in 52.44% and as Child-Pugh B or C in 47.56%. Esophageal varices were present in 72.56% of the patients at endoscopy. PS/SA, with a cutoff of 3x108, had a sensitivity of 95.80% (confidence interval of 95% - 95%CI=0.92-0.99), a specificity of 22.70% (95%CI=0.10-0.35), a positive predictive value of 77.20% (95%CI=0.70-0.84) and a negative predictive value of 66.70% (95%CI=0.42-0.91). In the logistic regression, only platelet count and Child-Pugh score were associated to esophageal varices (P<0.05). CONCLUSION - PS/SA has an excellent sensitivity to predict esophageal varices, allowing almost one fourth of patients without esophageal varices to spare endoscopy. Nevertheless, PS/SA is not independently associated to esophageal varices.

scholarly journals Association between central non-dipping pattern and platelet morphology in adults with type 1 diabetes without cardiovascular disease: a cross-sectional study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Michal Kulecki ◽  
Dariusz Naskret ◽  
Mikolaj Kaminski ◽  
Dominika Kasprzak ◽  
Pawel Lachowski ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Type 1 Diabetes ◽  
Smoking Status ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Distribution Width ◽  
Non Invasive ◽  
Platelet Morphology ◽  
Oscillometric Device

AbstractThe non-dipping pattern is nighttime systolic blood pressure (SBP) fall of less than 10%. Several studies showed that the non-dipping pattern, increased mean platelet volume (MPV), and platelet distribution width (PDW) are associated with elevated cardiovascular risk. Hypertensives with the non-dipping pattern have higher MPV than the dippers but this relationship was never investigated among people with type 1 diabetes mellitus (T1DM). This study aimed to investigate the association between the central dipping pattern and platelet morphology in T1DM subjects. We measured the central and brachial blood pressure with a validated non-invasive brachial oscillometric device—Arteriograph 24—during twenty-four-hour analysis in T1DM subjects without diagnosed hypertension. The group was divided based on the central dipping pattern for the dippers and the non-dippers. From a total of 62 subjects (32 males) aged 30.1 (25.7–37) years with T1DM duration 15.0 (9.0–20) years, 36 were non-dippers. The non-dipper group had significantly higher MPV (MPV (10.8 [10.3–11.5] vs 10.4 [10.0–10.7] fl; p = 0.041) and PDW (13.2 [11.7–14.9] vs 12.3 [11.7–12.8] fl; p = 0.029) than dipper group. Multivariable logistic regression revealed that MPV (OR 3.74; 95% CI 1.48–9.45; p = 0.005) and PDW (OR 1.91; 95% CI 1.22–3.00; p = 0.005) were positively associated with central non-dipping pattern adjusting for age, sex, smoking status, daily insulin intake, and height. MPV and PDW are positively associated with the central non-dipping pattern among people with T1DM.

scholarly journals Integration of Family Planning Counselling to Mass Screening Campaign for Cervical Cancer: Experience from Guinea

2018 ◽  
Vol 2018 ◽  
pp. 1-6
Author(s):  
D. W. A. Leno ◽  
F. D. Diallo ◽  
A. Delamou ◽  
F. D. Komano ◽  
M. Magassouba ◽  
...  
Keyword(s):  
Cervical Cancer ◽  
Family Planning ◽  
Mass Screening ◽  
Local Treatment ◽  
Cost Effective ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Capital Cities ◽  
Long Acting ◽  
Cancer Experience

Aim. To assess feasibility of integrating family planning counselling into mass screening for cervical cancer in Guinea. Methodology. This was a descriptive cross-sectional study conducted over a month in Guinea regional capital cities. The targeted population comprised women aged 15 to 49 years. Nearly 4000 women were expected for the screening campaigns that utilized VIA and VIL methods with confirmation of positive tests through biopsy. A local treatment was immediately performed when the patient was eligible. Results. Overall 5673 women aged 15 to 60 years were received, a surplus of 42% of the expected population. 92.3% of women were aged 15–49 years and 90.1% were 25–49 years. Long-acting methods were the most utilized (89.2% of family planning users). 154 precancerous and cancerous lesions were screened, a global positivity rate of 2.7%. Conclusion. Integration of counselling and family planning services provision during cervical cancer mass screening is a feasible strategy. A cost-effective analysis of this approach would help a better planning of future campaigns and its replication in other contexts.

scholarly journals AST to Platelet Ratio Index (APRI) is an easy-to-use predictor score for cardiovascular risk in metabolic subjects

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Carlo De Matteis ◽  
Marica Cariello ◽  
Giusi Graziano ◽  
Stefano Battaglia ◽  
Patrizia Suppressa ◽  
...  
Keyword(s):  
Cardiovascular Risk ◽  
Liver Fibrosis ◽  
Visceral Obesity ◽  
Premenopausal Women ◽  
Cross Sectional Study ◽  
Serum Markers ◽  
Low Grade ◽  
Cross Sectional ◽  
Alcoholic Fatty Liver ◽  
Non Invasive

AbstractVisceral obesity is characterized by a low-grade inflammatory systemic state that contributes to the genesis of non-alcoholic fatty liver disease (NAFLD), frequently associated with liver fibrosis. Non-invasive serum markers have recently emerged as reliable, easy-to-use scores to predict liver fibrosis. NAFLD is often linked to metabolic and cardiovascular risk. Thus, in this cross-sectional study, we investigated in a population of 1225 subjects if AST to Platelet Ratio Index (APRI), one of the non-invasive liver fibrosis serum markers, can predict cardiovascular risk (CVR). APRI has been previously validated as an efficient score to predict liver fibrosis in viral hepatitis patients with a cut-off of 0.5 for fibrosis and 1.5 for cirrhosis. Our study showed that APRI significantly correlates with CVR and determines, when elevated, a significant increase in CVR for both genders, especially females. This spike in CVR, observed when APRI is elevated, is relatively high in patients in the age of 51–65 years, but it is significantly higher in younger and premenopausal women, approaching risk values usually typical of men at the same age. Taken together, our data highlighted the role of APRI as a reliable predictor easy-to-use score for CVR in metabolic patients.

Sociodemographic factors associated with postnatal maternal complications in public hospitals in Nairobi City County, Kenya

2021 ◽  
Vol 15 (1) ◽  
pp. 1-7
Author(s):  
Raheli Misiko Mukhwana ◽  
Margaret N Keraka ◽  
Meshack Onyambu
Keyword(s):  
Antenatal Care ◽  
Mode Of Delivery ◽  
Cost Effective ◽  
Sociodemographic Factors ◽  
Cross Sectional Study ◽  
Public Hospitals ◽  
Maternal Complications ◽  
Cross Sectional ◽  
Factors Associated ◽  
Focused Antenatal Care

Introduction/Aims Focused antenatal care provides individualised counselling, targeted assessment and safe, cost effective, evidence-based intervention. It has been implemented in developing countries as a strategy to improve maternal health. This study aimed to investigate sociodemographic factors associated with maternal complications in selected public county hospitals in Nairobi City County, Kenya. Methods This was a cross-sectional study using a sample of 397 postnatal women who were given a questionnaire, with sections on their sociodemographic and health characteristics. Data analysis was done using the Chi Square test to determine the association between study variables, with P<0.05 considered statistically significant. Results The study found that 30% of respondents reported a maternal complication during their current delivery outcome. Sociodemographic factors significantly associated with maternal complications were age (P=0.002), occupation (P=0.001) and income (P=0.011). The health factors associated with occurrence of maternal complications were number of deliveries (P=0.001) and mode of delivery (P=0.001). Conclusions A number of factors were found to be significantly associated with maternal outcomes, including age and occupation. Further studies to determine why young women do not use focused antenatal care are necessary, as this would help reduce the incidence of birth-associated complications.

scholarly journals Effects of Attitude, Motivation, and Eagerness for Physical Activity among Middle-Aged and Older Adults

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Md Mizanur Rahman ◽  
Dongxiao Gu ◽  
Changyong Liang ◽  
Rao Muhammad Rashid ◽  
Monira Akter
Keyword(s):  
Physical Activity ◽  
Older Adults ◽  
Positive Attitude ◽  
Sports Participation ◽  
Cost Effective ◽  
Cross Sectional Study ◽  
Middle Aged ◽  
Cross Sectional ◽  
Cost Effective Method ◽  
Global Statistics

Background. Although physical activity (PA) is a noninvasive and cost-effective method of improving the quality of health, global statistics show that only a few middle-aged and older adults engage in the recommended PAs. This is due to a lack of motivation and companionship. Objective. This study analyses the attitudes and self-determined motivation of Chinese middle-aged and older adults for PAs and their eagerness to participate in PAs such as sports, exercise, and recreational and cultural activities (RCAs), from attitudinal, eagerness, and motivational objectives of PAs perspective. Methods. A cross-sectional study was carried out on 840 middle-aged (35–54 years) and older adults (55+ years). To determine their attitude, eagerness, and self-determined motivation for PA, we used attitudinal, Eagerness for Physical Activity Scale (EPAS), and Situational Motivational Scale (SIMS). The data were analyzed with SPSS 23.0. Results. The results show that 39.1% of the participants were not satisfied with PAs. Compared with females, males reported a less positive attitude towards PAs. Moreover, a positive attitude decreases with age. Participants’ motivation and eagerness in activities such as RCAs, exercise, and sports are decreasing. Regarding self-determined motivation, there are gender differences in RCAs, but there is none for exercise and sports participation. Conclusion. The findings show the importance of RCAs and the support of family and friends enhancing the eagerness, attitude, and motivation to participate in PAs. Furthermore, the findings can help to create more effective PA programs for middle-aged and older adults. By engaging in RCAs, participants can reap the benefits of PAs. Participating in RCAs can lead to social equity in health.

scholarly journals Liver ultrasound elastography for the evaluation of periportal fibrosis in schistosomiasis mansoni: A cross-sectional study

2018 ◽  
Author(s):  
Joelma Carvalho Santos ◽  
Andrea Dória Batista ◽  
Carla Maria Mola Vasconcelos ◽  
Roberto Souza Lemos ◽  
Valter Romão de Souza ◽  
...  
Keyword(s):  
Shear Wave ◽  
Shear Wave Elastography ◽  
Cross Sectional Study ◽  
Cutoff Point ◽  
Sectional Study ◽  
Cross Sectional ◽  
Predictive Values ◽  
Cutoff Value ◽  
Periportal Fibrosis ◽  
Schistosomiasis Mansoni

AbstractBackgroundARFI elastrography has been used as a noninvasive method to assess the severity of liver fibrosis in viral hepatitis, although with few studies in schistosomiasis mansoni. We aimed to evaluate the performance of point shear wave elastography (pSWE) for predicting significant periportal fibrosis (PPF) in schistosomotic patients and to determine its best cutoff point.Methodology/Principal findingsThis cross-sectional study included 358 adult schistosomotic patients subjected to US and pSWE on the right lobe. Two hundred two patients (62.0%) were women, with a median age of 54 (ranging 18-92) years. The pSWE measurements were compared to the US patterns of PPF, as gold standard, according to the Niamey classification. The performance of pSWE was calculated as the area under the ROC curve (AUC). Patients were further classified into two groups: 86 patients with mild PPF and 272 patients with significant PPF. The median pSWE of the significant fibrosis group was higher (1.40 m/s) than that of mild fibrosis group (1.14 m/s, p<0.001). AUC was 0.719 with ≤1.11 m/s as the best cutoff value for excluding significant PPF. Sensitivity and negative predictive values were 80.5% and 40.5%, respectively. Whereas, for confirming significant PPF, the best cutoff value was >1.39 m/s, with specificity of 86.1% and positive predictive value of 92.0%.Conclusions/SignificancepSWE was able to differentiate significant from mild PPF, with better performance to predict significant PPF.Author summaryIn the developing world, over 207 million people are infected with parasitic Schistosoma worms. Among the species of Schistosoma that infect humans Schistosoma mansoni is one of the most common causes of illness. Here, we investigated the performance of point shear wave elastography (pSWE) for predicting significant periportal fibrosis (PPF) in schistosomotic patients and to determine its best cutoff point. We examined 358 people from northeast of Brazil for Schistosoma infections. The present study showed that pSWE was able to differentiate significant from mild PPF, with better performance to predict significant PPF.

scholarly journals Role of Squash Cytology in Intraoperative Diagnosis of Meningioma

2021 ◽  
Author(s):  
Gowri Prakasam ◽  
K Karkuzhali ◽  
Veeraraghavan Gurusamy
Keyword(s):  
Tamil Nadu ◽  
Frozen Section ◽  
Cost Effective ◽  
Cross Sectional Study ◽  
Histopathological Diagnosis ◽  
Suspected Case ◽  
Cross Sectional ◽  
Female Ratio ◽  
Medical College ◽  
Cost Effective Technique

Introduction: Primary Central Nervous System (CNS) tumours constitute less than 2% of overall cancers in adults and are the second most frequently encountered tumours in children. Meningiomas form 24-30% of primary intracranial tumours. Most intrinsic brain tumours are soft and gelatinous in consistency, smear preparation can readily made which gives excellent cytological details when compared to frozen section as the latter produces ice crystal artifacts. Aim: To assess the diagnostic utility of squash cytological evaluation of meningiomas and its comparison with final histopathological diagnosis. Materials and Methods: The cross-sectional study was done at Thanjavur Medical College, Thanjavur, Tamil Nadu, India for period of three years from January 2015 to December 2017. Total of 54 clinically diagnosed and radiologically suspected case of meningiomas were selected. Smears were prepared from the biopsy samples sent in normal saline and stained by Haematoxylin and Eosin (H&E) method. The cytological features were noted and matched with biopsy findings. Descriptive statistics were used to analyse the results. Results: Total of 54 squash smears with male to female ratio was 1:1.5. Maximum number of cases were seen between 41- 50 years followed by 51-60 years. Complete concordance was obtained in 51 cases (94.44%) and partial concordance was noted in a case due to underestimation of malignancy grade in squash cytology. Out of 54 cases, two cases were found to be discordant with final histopathological diagnosis. Conclusion: Intraoperative squash cytology is easy, rapid, reliable and cost-effective technique for neurosurgical consultation with fairly high accuracy in diagnosing meningiomas.

scholarly journals Dermoscopy and Trichoscopy in Dermatomyositis—A Cross-Sectional Study

2022 ◽  
Vol 11 (2) ◽  
pp. 375
Author(s):  
Magdalena Żychowska ◽  
Adam Reich
Keyword(s):  
Diagnostic Technique ◽  
Skin Lesions ◽  
Cross Sectional Study ◽  
Cutaneous Lesions ◽  
Cross Sectional ◽  
Cutaneous Manifestations ◽  
Non Invasive ◽  
Inflammatory Dermatoses ◽  
Curved Vessels ◽  
Established Role

Background: (Video)dermoscopy is a non-invasive diagnostic technique that has a well-established role in dermatooncology. In recent years, this method has also been increasingly used in the assessment of inflammatory dermatoses. So far, little is known about the (video)dermoscopic features of dermatomyositis (DM). Methods: Consecutive patients with DM were included in the study and videodermoscopic assessments of the nailfolds, scalp, and active skin lesions were performed. Results: Fifteen patients with DM (10 women and 5 men) were included. Capillaroscopy showed elongated capillaries (90.9%), avascular areas (81.8%), disorganized vessel architecture (81.8%), tortuous capillaries (72.7%), dilated capillaries (72.7%), and hemorrhages (72.7%). The trichoscopic findings included linear branched vessels (80.0%), linear vessels (60.0%), linear curved vessels (53.3%), perifollicular pigmentation (40.0%), perifollicular erythema (33.3%), scaling (20.0%), white (20.0%) or yellow (20%) interfollicular scales, and white (20.0%) or pinkish (13.3%) structureless areas. Polymorphic vessels of an unspecific distribution and white or pink structureless areas were frequently observed under dermoscopy in cutaneous manifestations of DM, including Gottron’s papules and Gottron’s sign. Conclusions: Dermoscopy of the nailfolds (capillaroscopy), scalp (tricoscopy), and active cutaneous lesions may be of value in the preliminary diagnosis of DM.

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