scholarly journals An exponential inequality for associated variables

2005 ◽  
Vol 73 (2) ◽  
pp. 189-197 ◽  
Author(s):  
Paulo Eduardo Oliveira
Keyword(s):  
Exponential Inequality ◽  
Associated Variables

scholarly journals Survival analysis of time to SARS-CoV-2 PCR negativisation to optimise PCR prescription in health workers: the Henares COVID-19 healthcare workers cohort study

2021 ◽  
pp. oemed-2020-106903
Author(s):  
Julio González Martin-Moro ◽  
Marta Chamorro Gómez ◽  
Galicia Dávila Fernández ◽  
Ana Elices Apellaniz ◽  
Ana Fernández Hortelano ◽  
...  
Keyword(s):  
Cohort Study ◽  
Healthcare Workers ◽  
Cox Regression ◽  
Health Workers ◽  
Upper Respiratory Tract ◽  
Rt Pcr ◽  
Kaplan Meier ◽  
Confounding Variables ◽  
The Impact ◽  
Associated Variables

ObjectivesReverse transcriptase PCR (RT-PCR) is considered the gold standard in diagnosing COVID-19. Infected healthcare workers do not go back to work until RT-PCR has demonstrated that the virus is no longer present in the upper respiratory tract. The aim of this study is to determine the most efficient time to perform RT-PCR prior to healthcare workers’ reincorporation.Materials and methodsThis is a cohort study of healthcare workers with RT-PCR-confirmed COVID-19. Data were collected using the medical charts of healthcare workers and completed with a telephone interview. Kaplan-Meier curves were used to determine the influence of several variables on the time to RT-PCR negativisation. The impact of the variables on survival was assessed using the Breslow test. A Cox regression model was developed including the associated variables.Results159 subjects with a positive RT-PCR out of 374 workers with suspected COVID-19 were included. The median time to negativisation was 25 days from symptom onset (IQR 20–35 days). Presence of IgG, dyspnoea, cough and throat pain were associated with significant longer time to negativisation. Cox logistic regression was used to adjust for confounding variables. Only dyspnoea and cough remained in the model as significant determinants of prolonged negativisation time. Adjusted HRs were 0.68 (0.48–096) for dyspnoea and 0.61 (0.42–0.88) for dry cough.ConclusionsRT-PCR during the first 3 weeks leads to a high percentage of positive results. In the presence of respiratory symptoms, negativisation took nearly 1 week more. Those who developed antibodies needed longer time to negativisate.

The impact of tinnitus characteristics and associated variables on tinnitus-related handicap

2015 ◽  
Vol 130 (1) ◽  
pp. 25-31 ◽  
Author(s):  
S Degeest ◽  
P Corthals ◽  
I Dhooge ◽  
H Keppler
Keyword(s):  
Additional Insight ◽  
Tinnitus Handicap Inventory ◽  
Hearing Status ◽  
Questionnaire Score ◽  
Relationship Of ◽  
The Impact ◽  
The Relationship ◽  
Sample Case ◽  
Insight Into ◽  
Associated Variables

AbstractObjective:This study aimed to determine the characteristics of tinnitus and tinnitus-related variables and explore their possible relationship with tinnitus-related handicap.Methods:Eighty-one patients with chronic tinnitus were included. The study protocol measured hearing status, tinnitus pitch, loudness, maskability and loudness discomfort levels. All patients filled in the Tinnitus Sample Case History Questionnaire, the Hyperacusis Questionnaire and the Tinnitus Handicap Inventory. The relationship of each variable with the Tinnitus Handicap Inventory score was evaluated by univariate and multivariate analyses.Results:Five univariables were associated with the Tinnitus Handicap Inventory score: loudness discomfort level, subjective tinnitus loudness, tinnitus awareness, noise intolerance and Hyperacusis Questionnaire score. Multiple regression analysis showed that the Hyperacusis Questionnaire score and tinnitus awareness were independently associated with the Tinnitus Handicap Inventory score.Conclusion:Hyperacusis and tinnitus awareness were independently associated with the Tinnitus Handicap Inventory score. Questionnaires on tinnitus and hyperacusis are especially suited to providing additional insight into tinnitus-related handicap and are therefore useful for evaluating tinnitus patients.

scholarly journals Influence of trees and associated variables on soil organic carbon: a review

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Angom Sarjubala Devi
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Significant Negative Correlation ◽  
Mean Annual Temperature ◽  
Forest Stands ◽  
Mixed Stands ◽  
Silt Fraction ◽  
Different Types ◽  
Soil Climate ◽  
Associated Variables

AbstractThe level of soil organic carbon (SOC) fluctuates in different types of forest stands: this variation can be attributed to differences in tree species, and the variables associated with soil, climate, and topographical features. The present review evaluates the level of SOC in different types of forest stands to determine the factors responsible for the observed variation. Mixed stands have the highest amount of SOC, while coniferous (both deciduous-coniferous and evergreen-coniferous) stands have greater SOC concentrations than deciduous (broadleaved) and evergreen (broadleaved) tree stands. There was a significant negative correlation between SOC and mean annual temperature (MAT) and sand composition, in all types of forest stands. In contrast, the silt fraction has a positive correlation with SOC, in all types of tree stands. Variation in SOC under different types of forest stands in different landscapes can be due to differences in MAT, and the sand and silt fraction of soil apart from the type of forests.

Heavy Metal Concentrations in Malaysian Adults’ Hair and Associated Variables in Bukit Mertajam, Penang, Malaysia

2021 ◽  
Author(s):  
Mohd Yusmaidie Aziz ◽  
Shahruliza Haja Hussain ◽  
Ahmad Razali Ishak ◽  
Muhamad Azwat Abdullah ◽  
Rafeezul Mohamed ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Concentrations ◽  
Heavy Metal Concentrations ◽  
Associated Variables

Depression and associated variables in people over 50 years in Spain

2018 ◽  
Vol 11 (4) ◽  
pp. 216-226 ◽  
Author(s):  
Cristina Portellano-Ortiz ◽  
Josep Garre-Olmo ◽  
Laia Calvó-Perxas ◽  
Josep Lluís Conde-Sala
Keyword(s):  
Associated Variables

Postural Disorders in Conservatory Students: The Diesis Project

2014 ◽  
Vol 29 (1) ◽  
pp. 19-22 ◽  
Author(s):  
M Ramella ◽  
F Fronte ◽  
RM Converti
Keyword(s):  
Negative Impact ◽  
Giuseppe Verdi ◽  
Professional Musicians ◽  
Chi Square ◽  
Regression Methods ◽  
Increased Risk ◽  
Conservatory Students ◽  
Postural Disorders ◽  
Associated Variables

Prolonged and incorrect postures are one of the main risk factors for the development of musculoskeletal pathologies. The aims of this study were to study the prevalence of incorrect postures among conservatory students; to identify if the use of an asymmetric instrument represents a risk factor for developing postural disorders; and to investigate whether a correlation exists between years of study, physical activity, and prevalence of postural disorders. METHODS: The subjects were recruited among students of the Giuseppe Verdi Conservatory of Milano. All musical instruments were investigated and classified as asymmetric and symmetrical. The observed student posture was classified without instrument as “correct posture” or “postural disorder” and with an with instrument as “optimal posture” or “non-optimal posture.” While playing, the postural disorder was classified as “unchanged” or “increased.” The data were analyzed with chi-square and linear regression methods. RESULTS: Of the 148 conservatory students entered into the study, 66.2% had a postural disorder; 73.4% had a non-optimal posture, and playing an asymmetric instrument was the only variable associated (p=0.01). While playing, the postural disorder was increased in 59.2%; playing an asymmetric instrument (p=0.01) and years of practice (p=0.007) were the significantly associated variables. CONCLUSIONS: To play an asymmetric instrument exposes musicians to an increased risk of non-optimal postures and to a worsened postural disorder when present. Considering that the years of practice have an additional negative impact on postural disorders, further studies are needed to clarify the role of non-optimal postures in the development of musculoskeletal complaints among students and professional musicians.

The Impact of Performance Variables on Industry in K-Economy

2013 ◽  
Vol 64 (2) ◽  
Author(s):  
Muhammad Jawad Iqbal ◽  
Ibn-e- Hassan
Keyword(s):  
Knowledge Economy ◽  
Structural Equation ◽  
Strong Relationship ◽  
Equation Modeling ◽  
Survey Questionnaire ◽  
Performance Variables ◽  
Complementary Resources ◽  
The Impact ◽  
Associated Variables

In the knowledge economy, companies are thought to be the experts who develop innovative product or service as per demand and then market it to generate the revenue. The role of industry in a knowledge economy is to search and to promote inter-organizational collaborations for learning and to search linkages to arrange for complementary resources. These interactions improve the performance of industry in the knowledge economy. This research has been conducted to find out the impact of industry associated variables that significantly influence the performance of knowledge economy. Important attributes have therefore, been identified from the studies conducted in the field of knowledge economy. Influence of identified attributes on industry has been measured using structural equation modeling (SEM) technique. Data has been collected using survey questionnaire. Findings of the study confirm that there exist a strong relationship among the industry and it’s identified variables that collectively influence the performance of industry in the knowledge economy.

Sign in / Sign up

Export Citation Format

Share Document