scholarly journals The Prevalence of Tonsilloliths and Other Soft Tissue Calcifications in Patients Attending Oral and Maxillofacial Radiology Clinic of the University of Iowa

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Babatunde Olamide Bamgbose ◽  
Axel Ruprecht ◽  
John Hellstein ◽  
Sherry Timmons ◽  
Fang Qian
Keyword(s):  
Case Control Study ◽  
Case Control ◽  
Matched Pair ◽  
Maxillofacial Radiology ◽  
University Of Iowa ◽  
Body Tissues ◽  
Study Population ◽  
Oral And Maxillofacial Radiology ◽  
The University ◽  
Control Study

Objective. The purpose of this study was to determine the prevalence of tonsiliths in patients attending the oral and maxillofacial radiology clinic of The University of Iowa and to determine if there is any correlation between the presence of tonsiliths and the presence of stones in other body tissues, ducts, or organs. Study Design. This was a two-part study. The first part was a prevalence study whereas the second was a matched pair case-control study. The matched pair case-control study commenced after the prevalence study was concluded. No new or unusual radiographs were made in this study. The study only reviewed radiographs that were made for clinical purposes. Results. A total of 1524 pantomographs were reviewed and 124 subjects (53 males and 71 females) aged 9 years and 2 months to 87 years (mean age 52.6 years) were included for data analysis. Thirty-eight subjects had single tonsiliths whereas 86 subjects had multiple tonsiliths. The prevalence of tonsiliths in the study population was 8.14%. A total of 20 subjects were included in the second part of the study, comprising 10 each for matched pair case-control groups. The observations did not indicate any correlation between the presence of tonsiliths and the presence of stones in other body tissues, ducts, or organs. Conclusion. The prevalence of tonsiliths in our study population was 8.14%. The observations in our study do not support any correlations between tonsiliths and calcifications in other body tissues, organs, or ducts.

scholarly journals SEVERAL FACTORS ASSOCIATING WITH CONTACT DERMATITIS ON OIL PALM PLANTATIONS WORKERS IN BELUTU VILLAGE, KANDIS SUBDISTRICT IN 2016

1930 ◽  
Vol 8 (01) ◽  
pp. 63-66
Author(s):  
Muhamadiah
Keyword(s):  
Contact Dermatitis ◽  
Oil Palm ◽  
Case Control Study ◽  
Case Control ◽  
Personal Hygiene ◽  
Systematic Random Sampling ◽  
Study Population ◽  
Logistic Regressions ◽  
Design Type ◽  
Control Study

Contact dermatitis is skin infection occurring because of allergen and irritant material. Data of Kandis Health Center show 389 cases of dermatitis, 97 cases among cases of dermatitis are oil palm plantation workers living in Belutu Village. The objective of research is to detect factors associating with contact dermatitis on oil palm plantations workers in Belutu Village. The design type of occurrence research is case control study. Population of cases is 97 workers suffering from contact dermatitis and population of control is 1235 workers who are not suffering from contact dermatitis. Based on case control study in which one cases and two control, significant level of 5%, power of test 90%, it is 81 cases and 162 controls taken from each population by systematic random sampling. Analysis of data consists of one variable, two variables, and multiple logistic regressions analysis. Chemical contact (CI 95% OR: 1,34 – 4,12), without Personal Protective Equipment (PPE) (CI 95% OR: 1,110 – 3,405), poor Personal hygiene CI 95% OR: 1,087 – 3,415), associating with contact dermatitis. Chemical contact, without using PPE, and poor personal hygiene effect the occurrence of contact dermatitis on oil palm plantations workers in Belutu Village. Recommendation is to avoid chemical contact, use PPE and improve personal hygiene. Suggestion formulated based on the recommendation.

Mo1529 The Efficacy of Hemospray in Patients With Upper GI Bleeding From Tumor: a Matched-Pair Case-Control Study

2015 ◽  
Vol 81 (5) ◽  
pp. AB453-AB454
Author(s):  
Rapat Pittayanon ◽  
Piyapan Prueksapanich ◽  
Rungsun Rerknimitr ◽  
Pinit Kullavanijaya
Keyword(s):  
Case Control Study ◽  
Case Control ◽  
Matched Pair ◽  
Gi Bleeding ◽  
Upper Gi Bleeding ◽  
Upper Gi ◽  
Control Study

630 Laparoscopic Versus Open Liver Resection: A Matched-Pair Case Control Study

2009 ◽  
Vol 136 (5) ◽  
pp. A-876
Author(s):  
Kaori Ito ◽  
Hiromichi Ito ◽  
William R. Jarnagin ◽  
Yuman Fong ◽  
Ronald P. DeMatteo ◽  
...  
Keyword(s):  
Liver Resection ◽  
Case Control Study ◽  
Case Control ◽  
Matched Pair ◽  
Open Liver Resection ◽  
Control Study

High DNA content and prognosis in lymph node positive breast cancer. A case control study by the university of Leiden and ECOG

1993 ◽  
Vol 28 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Kennedy W. Gilchrist ◽  
Robert Gray ◽  
Anneke M. J. van Driel-Kulker ◽  
Wilma E. Mesker ◽  
Joke J. Ploem-Zaaijer ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Lymph Node ◽  
Dna Content ◽  
Case Control Study ◽  
Case Control ◽  
University Of Leiden ◽  
Lymph Node Positive ◽  
The University ◽  
Control Study ◽  
Positive Breast Cancer

scholarly journals Reasons for SARS-CoV-2 Infection in Children and Their Role in the Transmission of Infection According to Age: a Case-control Study.

2021 ◽  
Author(s):  
Calvani Mauro ◽  
Giulia Cantiello ◽  
Maria Cavani ◽  
Eleonora Lacorte ◽  
Bruno Mariani ◽  
...  
Keyword(s):  
Logistic Regression ◽  
School Children ◽  
Case Control Study ◽  
Nursery School ◽  
Case Control ◽  
Multivariate Logistic Regression ◽  
Household Contacts ◽  
Study Population ◽  
Control Study ◽  
Age And Sex

Abstract Background. The locations where children get exposed to SARS-CoV-2 infection and their contribution in spreading the infection are still not fully understood. Aim of the article is to verify the most frequent reasons for SARS-CoV-2 infection in children and their role in the secondary transmission of the infection. Methods. A case-control study was performed in all SARS-CoV-2 positive children (n= 81) and an equal number of age- and sex- matched controls who were referred to the S. Camillo-Forlanini Pediatric Walk-in Center of Rome. The results of all SARS-CoV-2 nasopharyngeal swabs performed in children aged <18 years from October 16 to December 19, 2020 were analyzed. Results. School contacts were more frequent in controls than in cases (OR 0.49; 95% CI: 0.3-0.9), while household contacts were higher in cases (OR 5.09; 95% CI: 2.2-12.0 ). In both cases and controls, school contacts were significantly less frequent, while on the contrary household contacts seemed to be more frequent in nursery school children compared to primary school or middle/high school children. A multivariate logistic regression showed that the probability of being positive to SARS-CoV-2 was significantly lower in children who had school contacts or who had flu symptoms compared to children who had household contacts. Results showed a 30.6% secondary attack rate for household contacts. Conclusion. In our study population, the two most frequent reasons for SARS-CoV-2 infection were school and home contacts. The risk of being positive was 5 times lower in children who had school contacts than in children who had household contacts.

scholarly journals Dietary Pattern in Relation With CRC Risk Among Moroccan Population; A Multicenter Case-Control Study

2018 ◽  
Vol 4 (Supplement 2) ◽  
pp. 11s-11s
Author(s):  
H.A. Boudouaya ◽  
K. Elkinany ◽  
M. Sidi Deoula ◽  
Z. Hatime ◽  
A. Elasri ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Principal Component Analysis ◽  
Olive Oil ◽  
Dairy Products ◽  
Case Control Study ◽  
Principal Component ◽  
Case Control ◽  
Dietary Factors ◽  
Study Population ◽  
Control Study

Background: Colorectal cancer (CRC) is a global public health problem, an estimated of 1.4 million cases were diagnosed worldwide in 2012. Studies in health and nutrition confirmed that dietary factors were strongly associated with CRC risk. Aim: The objective of this empirically study was to reveal unobserved dietary profiles that were associated favorably or unfavorably with CRC risk in Moroccan study population. Methods: This case-control study included a total of 2906 participants in five centers, 1453 cases and 1453 controls, and was gender, age and center matched. Statistical exploratory data reduction methods were performed in this study population based on a specific scientific hypothesis linking dietary behavior and colorectal cancer risk. Principal component analysis (PCA) was applied separately in cases and in controls as individuals and with FFQ nutritional group's heads items as variables. The correlation matrix of food variables was examined to explain most of the variation in the data, reducing a large number of food variables to a smaller set that captures the major dietary factors differences in Moroccan population. Results: Three alimentary profiles were identified for controls based on three principal component analysis, which the first one was highly positive with high cereals, fruits and nuts, legumes, fish, olive oil, dairy products and legumes consumption, and was highly negative with an increasing consumption of poultry and red meat. This component explained 26.5% of the variance in initial data and described a healthy pattern characterized with high fiber intake. In opposite, five principal components were identified for cases that indicated five nutritional profiles with a predominance of dairy products, nuts, fish consumption and low legumes, olive oil and fruits intake: its explained 15.37% of total variance. Conclusion: PCA analysis is a multidimensional factor analysis method that was used in this epidemiologic study to describe the variance in our big database in relation with CRC risk among Moroccan people. This method needs a supervised analysis such as linear discriminant analysis (LDA) to give interpretation and prediction models of CRC risk related to nutritional behavior among this study population.

scholarly journals Risk Factors for Difficult Peripheral Intravenous Cannulation. The PIVV2 Multicentre Case-Control Study

2020 ◽  
Vol 9 (3) ◽  
pp. 799 ◽  
Author(s):  
Miguel Angel Rodriguez-Calero ◽  
Joan Ernest de Pedro-Gomez ◽  
Luis Javier Molero-Ballester ◽  
Ismael Fernandez-Fernandez ◽  
Catalina Matamalas-Massanet ◽  
...  
Keyword(s):  
Risk Factors ◽  
Logistic Regression ◽  
Vascular Access ◽  
Case Control Study ◽  
Previous History ◽  
Case Control ◽  
Public Hospitals ◽  
Study Population ◽  
Independent Risk Factors ◽  
Control Study

Background. Difficult peripheral intravenous cannulation (DPIVC) is associated with serious complications related to vascular access. These complications might be avoided if the risk factors were identified previously, enabling the detection of potentially difficult situations at an early stage. The aim of this study is to consider these risk factors, to determine the influence of the hospital setting, to examine the association between DPIVC and the different techniques of catheter insertion and to analyse the importance of the clinician’s experience in this context. Methods. Case-control study following a previously published protocol, conducted in 48 units of eight public hospitals in Spain. Adult patients requiring a peripheral intravenous cannula were prospectively included in the study population during their hospital stay. Over a period of 11 months, for consecutive eligible patients, nurses in each participating unit recorded data on their assessment of the vascular access performed and the technique used. Variables related to these medical personnel were also recorded. One of the researchers reviewed the patients’ clinical history to compile the relevant health variables and to characterise the healthcare process. The statistical analysis included association tests among the main study variables. The risk factors were analysed using bivariate logistic regression. The variables found to be statistically significant were included in a multivariate logistic regression model incorporating each of the healthcare environments identified. Results. The study population was composed of 2662 patients, of whom 221 (8.3%) presented with DPIVC. A previous history of difficulty, the presence of non-palpable veins, acute upper limb alterations and punctures in the ante-cubital fossa were found to be independent risk factors for DPIVC. Differences were found in the frequency of occurrence of DPIVC and in some risk factors, according to the healthcare context. The variables related to the characteristics of the hospital personnel did not influence the study event. Conclusion: The present study identifies four independent risk factors for DPIVC that can be incorporated into algorithms aimed at preventing its occurrence and facilitating the referral of patients to vascular access specialist teams.

Sign in / Sign up

Export Citation Format

Share Document