scholarly journals Fluoride intake from regular and low fluoride dentifrices by 2-3-year-old children: influence of the dentifrice flavor

2007 ◽  
Vol 21 (3) ◽  
pp. 234-240 ◽  
Author(s):  
Samanta Mascarenhas Moraes ◽  
Juliano Pelim Pessan ◽  
Irene Ramires ◽  
Marília Afonso Rabelo Buzalaf
Keyword(s):  
Body Weight ◽  
Regression Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Good Alternative ◽  
Strong Positive Correlation ◽  
Positive Correlation ◽  
Care Givers ◽  
Fluoride Intake

This study evaluated the fluoride intake from dentifrices with different fluoride concentrations ([F]) by children aged 24-36 months, as well as the influence of the dentifrice flavor in the amount of fluoride ingested during toothbrushing. Thirty-three children were randomly divided into 3 groups, according to the [F] in the dentifrices: G-A (523 µgF/g), G-B (1,062 µgF/g) and G-C (1,373 µgF/g). Dentifrices A and B are marketed for children, while dentifrice C is a regular product. The amount of F ingested was indirectly obtained, subtracting the amount expelled and the amount left on the toothbrush from the amount initially loaded onto the brush. The results were analyzed by ANOVA, Tukey's test and linear regression analysis (p < 0.05). Children ingested around 60% of the dentifrice loaded onto the brush, but no significant differences were seen among the groups (p > 0.05). Mean daily fluoride intake from dentifrice for G-A, G-B and G-C was 0.022ª, 0.032ª and 0.061b mg F/kg body weight, respectively (p < 0.01). There was a strong positive correlation (r = 0.86, p < 0.0001) between the amount of dentifrice used and the amount of fluoride ingested during toothbrushing. The results indicate the need for instructing children's parents and care givers to use a small amount of dentifrice (< 0.3 g) to avoid excessive ingestion of fluoride. The use of low-[F] dentifrices by children younger than 6 years also seems to be a good alternative to minimize fluoride intake. Dentifrice flavor did not influence the percentage of fluoride intake.

scholarly journals The Effect of Automotive Seat Cushion Stiffness Distribution on the Subjective Comfort

2019 ◽  
Vol 8 (2S6) ◽  
pp. 336-341
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Multiple Linear Regression ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
The Body ◽  
Strong Positive Correlation ◽  
Comfort Evaluation ◽  
Selection Of Variables ◽  
Stiffness Distribution

When body pressures are concentrated, sense of fatigue is increased. To confirm this, correlation analysis between the difference in stiffness of seat and comfort using multiple linear regression analysis has been conducted. For the selected three types of seats which are small-, mid-, and large-size seats, respectively, static tests were con-ducted to measure the distribution of the subject's body pressure on the cushion, through which local stiffness distribution were derived. Also, a subjective comfort evaluation was conducted, and analyzed. According to the present analysis results, the correlation coefficients between stiff-ness of hip area and comfort of hip area were observed to be 0.713 and 0.789, respectively, indicating a strong positive correlation. Thus, the comfort of seat perceived by the driver could be seen to have the largest linear correlation with the stiffness of hip area. Selection of variables for the multiple linear regression analysis was implemented by a backward removal method. Differences of stiffness by areas were selected as independent variables, and subjective comfort evaluation results were selected as dependent variables. According to multiple regression analysis, the comfort of the cushion increased when the left and right balance of the stiffness distribution was maintained even if the body pressure distribution of the hip area was concentrated on one side. According to the analysis results, the stiffness of hip area could be seen to have the greatest linear relationship with the overall satisfaction of comfort, in which comfort is planned to be confirmed by actual production of seats

scholarly journals Relations of Morphological Characteristics and Aerobic Durability of Fudbalers of Different Age Categories // Relacije morfoloških karakteristika i aerobne izdržljivosti fudbalera različitih uzrasnih kategorija

2018 ◽  
Vol 15 (1) ◽  
Author(s):  
Vladan Pelemiš ◽  
Darijan Ujsasi ◽  
Danica Džinović ◽  
Dušan Josić
Keyword(s):  
Body Weight ◽  
Regression Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Body Height ◽  
Morphological Characteristics ◽  
Median Volume ◽  
Run Test ◽  
Shuttle Run

The aim of the study was to analyze if there is a connection between some anthropometric measrements and a test for assessing aerobic ability in footballers of different age categories. 65 players were subjected to these measurements, of which 25 players aged 13-14 years (pioneers); 20 players aged 15-16 years (cadets) and 20 players aged 17-18 years (juniors). By using standard anthropometric instruments, body height, body weight, median volume of the chest and aerobic endurance were measured using a 20m “shuttle run” test. Using linear regression analysis, it was found that there is no statistically significant effect of anthropometric variables on a variable (20m “shuttle run”) of all three age players. In these ages, obviously some other characteristics have more influence on the manifestation of aerobic ability. The results of the research can be used by experts in the field of sports in further planning and organizing training contents

scholarly journals Correlation Between Student Performances on Course Level Integrated Clinical Skills Examinations and Objective Structured Clinical Examinations in a Chiropractic College Program

2012 ◽  
Vol 26 (2) ◽  
pp. 138-145
Author(s):  
Brent S. Russell ◽  
Kathryn T. Hoiriis ◽  
Joseph Guagliardo
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Student Performance ◽  
Clinical Skills ◽  
Linear Regression Analysis ◽  
Correlation Coefficients ◽  
Multiple Linear Regression Analysis ◽  
Strong Positive Correlation ◽  
Objective Structured Clinical Examinations ◽  
Upper Level

Purpose: This retrospective study measured correlation of student performance between 2 objective structured clinical examinations (OSCEs) and an introductory integrated clinical skills course that preceded the OSCEs. The hypothesis was that there would be a strong, positive correlation between the earlier level examinations and the upper level OSCE, high enough that earlier examinations could be viewed as predictors of upper level OSCE performance. Methods: Using student scores for 5 academic terms of upper level OSCEs for 2008–2009 (n = 208) and respective earlier scores, correlation coefficients were calculated for the upper level OSCE and Clinical Skills course, and upper and lower level OSCEs. Multiple linear regression analysis was used to evaluate how well the lower level OSCE and clinical skills scores, both as lone and combined independent variables, predicted the upper level OSCE scores. Results: There was at least a moderate correlation between both sets of scores: r = .51 (p &lt; .001) between upper level OSCE and clinical skills course, r = .54 (p &lt; .001) between the upper and lower level OSCEs. A combination of clinical skills and lower level OSCE scores suggested a moderate prediction of upper level OSCE scores (R2 = .38.) Conclusions: Correlations were found to be of at least a moderate level. According to linear regression analysis, a combination of the earlier scores was moderately predictive for the upper level OSCE. More research could be done to determine additional components of student performance.

Effect of Patient Characteristics on Vessel Enhancement in Pediatric Chest Computed Tomography Angiography

2019 ◽  
Vol 70 (2) ◽  
pp. 181-185
Author(s):  
Takanori Masuda ◽  
Takeshi Nakaura ◽  
Yoshinori Funama ◽  
Tomoyasu Sato ◽  
Tetsuya Nitta ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Body Weight ◽  
Regression Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Patient Characteristics ◽  
Multivariate Linear Regression Analysis ◽  
Chest Computed Tomography ◽  
Pediatric Chest ◽  
Vessel Enhancement

Introduction To evaluate the effect of sex, age, height, cardiac output (CO), total body weight (TBW), body surface area (BSA), and lean body weight (LBW) on vessel enhancement of the ascending aorta in pediatric chest computed tomography angiography (c-CTA). Materials and Methods This retrospective study received institutional review board approval; parental prior informed consent for inclusion was obtained for all patients. All 50 patients were examined using our routine protocol; iodine (600 mg/kg) was the contrast medium (CM). Unenhanced and contrast-enhanced scans were obtained. We calculated the CM volume per vessel enhancement and performed univariate and multivariate linear regression analysis of the relationship between CM volume per vessel enhancement and each of the body parameters. Results All patient characteristics were significantly related to CM volume per vessel enhancement ( P < .05). Multivariate linear regression analysis revealed a significant correlation between CM volume per vessel enhancement and TBW, BSA, and LBW, but not the patient sex, age, CO, and height. The LBW model for CM volume per vessel enhancement yielded the highest determination coefficient (R2 = .913) and the lowest Akaike Information Criterion (400.324). Conclusions Our findings support the delivery of an iodine dose adjusted to the LBW at c-CTA.

Effect of the pH on the degree of autolysis of Aspergillus niger

1979 ◽  
Vol 57 (18) ◽  
pp. 1901-1903 ◽  
Author(s):  
R. Lahoz ◽  
Fuensanta Reyes ◽  
M. J. Martinez ◽  
Luis Jimeno
Keyword(s):  
Regression Analysis ◽  
Aspergillus Niger ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Defined Medium ◽  
Chemically Defined Medium ◽  
Effect Of Ph ◽  
Positive Correlation ◽  
Ph Values

The effect of pH on the degree of autolysis of cultures of Aspergillus niger autolysed at different pH values has been studied. In each experiment the fungus was grown in a chemically defined medium until autolysis commenced. At that time the pH was adjusted to values of 2, 4, 6, 8, or 10 and automatically controlled at that pH throughout the autolytic period. A positive correlation (r = 0.77) between pH and the degree of autolysis was found. Linear regression analysis indicated that the data were fitted by a line of slope 2.53 and an ordinate intercept of 41.83.

Coccidiosis in wild rabbits, Oryctolagus cuniculus (L.), at four sites in different climatic regions in eastern Australia I. Relationship with the age of the rabbit

1968 ◽  
Vol 16 (1) ◽  
pp. 69 ◽  
Author(s):  
E Stodart
Keyword(s):  
Body Weight ◽  
Regression Analysis ◽  
Linear Regression ◽  
Oryctolagus Cuniculus ◽  
New South ◽  
Linear Regression Analysis ◽  
Climatic Regions ◽  
South Wales ◽  
Eastern Australia ◽  
Breeding Seasons

A total of 2881 rabbits were shot during 1962-64 in regular samples from four sites representing different climatic regions in eastern Australia. Samples of the faeces were examined for coccidial oocysts. Seven species of Eimeria (E. stiedae, E. media, E. perforans, E. irresidua, E. magna, E. piriformis, and E. exigua) were recorded. Dried lens weight and paunched (eviscerated) body weight of the rabbits were used as estimates of age. A decrease in oocyst output with increasing age of the rabbit was apparent when progeny of particular breeding seasons were followed and when all data were grouped together at the subalpine site. Linear regression analysis showed that the decrease was greatest at the subalpine site, where the young had high oocyst counts, less in the subtropical and Mediterranean climates, and virtually absent at the arid site. The rate of the decrease varied between species; it was greatest for E. magna and was slight and variable in occurrence for E. piriformis. Adult rabbits transported from the arid site to infected pasture in Canberra were found from 1 to 10 weeks after release to have an oocyst count comparable to that of young rabbits at the subalpine site. Cage-reared progeny of the rabbits from the arid site were more susceptible to accidental infection than cage-reared progeny of rabbits from the temperate southern tablelands of New South Wales.

Bayesian hierarchical approach to estimate insulin sensitivity by minimal model

2003 ◽  
Vol 105 (5) ◽  
pp. 551-560 ◽  
Author(s):  
Olorunsola F. AGBAJE ◽  
Stephen D. LUZIO ◽  
Ahmed I. S. ALBARRAK ◽  
David J. LUNN ◽  
David R. OWENS ◽  
...  
Keyword(s):  
Body Weight ◽  
Regression Analysis ◽  
Insulin Sensitivity ◽  
Linear Regression ◽  
Bayesian Analysis ◽  
Minimal Model ◽  
Linear Regression Analysis ◽  
World Health ◽  
Bayesian Hierarchical ◽  
Non Linear

We adopted Bayesian analysis in combination with hierarchical (population) modelling to estimate simultaneously population and individual insulin sensitivity (SI) and glucose effectiveness (SG) with the minimal model of glucose kinetics using data collected during insulin-modified intravenous glucose tolerance test (IVGTT) and made comparison with the standard non-linear regression analysis. After fasting overnight, subjects with newly presenting Type II diabetes according to World Health Organization criteria (n=65; 53 males, 12 females; age, 54±9 years; body mass index, 30.4±5.2 kg/m2; means±S.D.) underwent IVGTT consisting of a 0.3 g of glucose bolus/kg of body weight given at time zero for 2 min, followed by 0.05 unit of insulin/kg of body weight at 20 min. Bayesian inference was carried out using vague prior distributions and log-normal distributions to guarantee non-negativity and, thus, physiological plausibility of model parameters and associated credible intervals. Bayesian analysis gave estimates of SI in all subjects. Non-linear regression analysis failed in four cases, where Bayesian analysis-derived SI was located in the lower quartile and was estimated with lower precision. The population means of SI and SG provided by Bayesian analysis and non-linear regression were identical, but the interquartile range given by Bayesian analysis was tighter by approx. 20% for SI and by approx. 15% for SG. Individual insulin sensitivities estimated by the two methods were highly correlated (rS=0.98; P<0.001). However, the correlation in the lower 20% centile of the insulin-sensitivity range was significantly lower than the correlation in the upper 80% centile (rS=0.71 compared with rS=0.99; P<0.001). We conclude that the Bayesian hierarchical analysis is an appealing method to estimate SI and SG, as it avoids parameter estimation failures, and should be considered when investigating insulin-resistant subjects.

scholarly journals The Pertinent Literature of Enhanced Recovery after Surgery Programs: A Bibliometric Approach

Medicina ◽  
2021 ◽  
Vol 57 (2) ◽  
pp. 172
Author(s):  
Cheng Li ◽  
Yang Cheng ◽  
Zhao Li ◽  
Donara Margaryan ◽  
Carsten Perka ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Bibliometric Analysis ◽  
Enhanced Recovery ◽  
Enhanced Recovery After Surgery ◽  
Linear Regression Analysis ◽  
Gastrointestinal Surgery ◽  
The United States ◽  
Current Status ◽  
Strong Positive Correlation

Background and Objectives: The programs of enhanced recovery after surgery are the new revolution in surgical departments; however, features of this concept have not been systematically explored. Therefore, the purpose of this study was to explore Enhanced recovery after surgery (ERAS)-related research using bibliometric analysis. Materials and Methods: The search strategy of ERAS programs was conducted in the Web of Science database. Bibliometric analysis was further performed by Excel and Bibliometrix software. The relationship between citation counts and Mendeley readers was assessed by linear regression analysis. Results: 8539 studies from 1994–2019 were included in the present research, with reporting studies originating from 91 countries using 18 languages. The United States (US) published the greatest number of articles. International cooperation was discovered in 82 countries, with the most cooperative country being the United Kingdom. Henrik Kehlet was found to have published the highest number of studies. The journal Anesthesia and Analgesia had the largest number of articles. Linear regression analysis presented a strong positive correlation between citations and Mendeley readers. Most research was related to gastrointestinal surgery in this field. Conclusion: This bibliometric analysis shows the current status of ERAS programs from multiple perspectives, and it provides reference and guidance to scholars for further research.

scholarly journals P1421SERUM OSTEOPROTEGERIN LEVEL IS NEGATIVELY ASSOCIATED WITH BONE MINERAL DENSITY IN PATIENTS UNDERGOING HEMODIALYSIS

2020 ◽  
Vol 35 (Supplement_3) ◽  
Author(s):  
Chia-Wen Lu ◽  
Jia-Sian Hou ◽  
Bang-Gee Hsu
Keyword(s):  
Bone Mineral Density ◽  
Body Weight ◽  
Regression Analysis ◽  
Linear Regression ◽  
Bone Mineral ◽  
Linear Regression Analysis ◽  
Hemodialysis Patients ◽  
Enzyme Linked Immunosorbent Assay ◽  
Mineral Density ◽  
Study Results

Abstract Background and Aims Osteoprotegerin, a potent osteoclast activation inhibitor, decreases bone resorption and positively affects bone mineral density (BMD). Our aim was to evaluate the relationship between BMD and fasting serum osteoprotegerin concentration in hemodialysis patients. Method Fasting blood samples were obtained from 75 chronic hemodialysis patients. BMD was measured by dual energy X-ray absorptiometry in lumbar vertebrae (L2-L4). Serum osteoprotegerin levels were measured using a commercial enzyme-linked immunosorbent assay. Results A total of 7 patients (9.3%) had osteoporosis and 20 patients (26.7%) had osteopenia in hemodialysis patients. Older age (p = 0.023), increased serum osteoprotegerin (p &lt; 0.001), urea reduction rate (URR, p = 0.021), Kt/V (p = 0.027), while decreased height (p &lt; 0.001), body weight (p &lt; 0.001), body mass index (BMI; p &lt; 0.001), and logarithmically transformed triglyceride (log-triglyceride, p = 0.020) was significantly correlated with low lumbar T-score cut-off points between groups (normal, osteopenia, and osteoporosis) in hemodialysis patients. Female patients had lower lumbar BMD than male hemodialysis patients (p = 0.002). Univariate linear regression analysis indicated lumbar BMD were positively correlated with height (p &lt; 0.001), body weight (p &lt; 0.001), BMI (p &lt; 0.001), log-triglyceride (p = 0.004), creatinine (p = 0.016), while negatively correlated with age (p = 0.001), alkaline phosphatase (p = 0.016), URR (p = 0.012), Kt/V (p = 0.013), and osteoprotegerin (p &lt; 0.001) among the hemodialysis patients. Multivariate forward stepwise linear regression analysis of the significant variables revealed that female hemodialysis patient (adjusted R2 change = 0.040; p = 0.003), body weight (adjusted R2 change = 0.126; p = 0.001), kt/V (adjusted R2 change = 0.024; p = 0.034) and osteoprotegerin (adjusted R2 change = 0.332; p &lt; 0.001) were the independent predictors of lumbar BMD values in the hemodialysis patients. Conclusion Our study results revealed that increased serum osteoprotegerin levels were independently associated with decreased BMD in the lumbar spine, and with increased risk of osteoporosis in hemodialysis patients.

Computed tomography measurements of intraocular structures of the feline eye

2019 ◽  
Vol 184 (21) ◽  
pp. 651-651 ◽  
Author(s):  
Shawn Sreenivasan Chandrakumar ◽  
Alex zur Linden ◽  
Mark Owen ◽  
Sarah Pemberton ◽  
Chantale L Pinard ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Body Weight ◽  
Regression Analysis ◽  
Retrospective Study ◽  
Optic Nerve ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Weak Correlation ◽  
Short Hair ◽  
Male Patients

Diagnostic imaging of the eye can be performed using ultrasonography, MRI or CT. This study describes the CT dimensions, volumes and radiodensities of presumed normal feline intraocular structures. Nineteen adult patients were included in this retrospective study. Fourteen males and five females were included, with domestic short hair (DSH) being the predominant breed. Length, volume and radiodensity values for the lens, anterior chamber, vitreous chamber and optic nerve were calculated as well as measurements of the optic nerve width. There was no significant correlation found on linear regression analysis comparing patient’s body weight with the various ocular measurements. Measurements of the lens, globe and optic nerve had significant differences (P<0.05) noted between the sexes, with males having increased values. These results may be skewed due to the large majority of male patients in the study. There was a weak correlation found between age and right eye (OD) optic nerve width, with an increase in the optic nerve width noted with increasing age. The findings of this study are a first step in establishing CT reference values for feline intraocular structure measurements.

Sign in / Sign up

Export Citation Format

Share Document