scholarly journals Cardiac baroreflex hysteresis is one of the determinants of the heart period variability asymmetry

2019 ◽  
Vol 317 (4) ◽  
pp. R539-R551 ◽  
Author(s):  
Beatrice De Maria ◽  
Vlasta Bari ◽  
Beatrice Cairo ◽  
Emanuele Vaini ◽  
Raphael Martins de Abreu ◽  
...  
Keyword(s):  
Healthy Subjects ◽  
Age Groups ◽  
Positive Association ◽  
Heart Period ◽  
Experimental Conditions ◽  
Significant Positive Association ◽  
Asymmetric Behavior ◽  
Sequence Method ◽  
The Difference ◽  
Spontaneous Fluctuations

In heart period (HP) variability (HPV) recordings the percentage of negative HP variations tends to be greater than that of positive ones and this pattern is referred to as HPV asymmetry (HPVA). HPVA has been studied in several experimental conditions in healthy and pathological populations, but its origin is unclear. The baroreflex (BR) exhibits an asymmetric behavior as well given that it reacts more importantly to positive than negative arterial pressure (AP) variations. We tested the hypothesis that the BR asymmetry (BRA) is a HPVA determinant over spontaneous fluctuations of HP and systolic AP (SAP). We studied 100 healthy subjects (age from 21 to 70 yr, 54 men) comprising 20 subjects in each age decade. Electrocardiogram and noninvasive AP were recorded for 15 min at rest in supine position (REST) and during active standing (STAND). The HPVA was evaluated via Porta’s index and Guzik’s index, while the BRA was assessed as the difference, and normalized difference, between BR sensitivities computed over positive and negative SAP variations via the sequence method applied to HP and SAP variability. HPVA significantly increased during STAND and decreased progressively with age. BRA was not significantly detected both at REST and during STAND. However, we found a significant positive association between BRA and HPVA markers during STAND persisting even within the age groups. This study supports the use of HPVA indexes as descriptors of BRA and identified a challenge soliciting the BR response like STAND to maximize the association between HPVA and BRA markers.

scholarly journals Studies on Spontaneous Platelet Aggregation (PAT III) in Patients with Vascular Disease

1977 ◽  
Author(s):  
H.J. Krzywanek ◽  
K. Breddin
Keyword(s):  
Platelet Aggregation ◽  
Healthy Subjects ◽  
Age Groups ◽  
Arterial Disease ◽  
Peripheral Occlusive Arterial Disease ◽  
Age Dependent ◽  
Patient Groups ◽  
The Difference ◽  
Spontaneous Platelet Aggregation ◽  
Prospective Investigation

Aggregation tests were performed in 345 patients with peripheral occlusive arterial disease (PAD), 274 patients with coronary heart disease (CHD), and 502 diabetics (D). 263 healthy volunteers (N) served as controls. As in previous studies an age dependent increase of strongly enhanced spontaneous platelet aggregation in obviously healthy subjects can be demonstrated, reaching 28% in the 50-59 years’age group. In the various patient groups the incidence of enhanced aggregation is much higher throughout all age groups than in the control s.The overall incidence of missing spontaneous platelet aggregation vs. strongly enhanced aggregation is summarized below. The difference between normals and the various patient groups is significant (X2-test, α<0.0001).A prospective investigation has been started to establish whether enhanced spontaneous platelet aggregation is a risk factor and an early indicator of progressive atherosclerosis.

Money and happiness: does age make a difference?

2011 ◽  
Vol 31 (8) ◽  
pp. 1289-1306 ◽  
Author(s):  
CHANG-MING HSIEH
Keyword(s):  
Older Adults ◽  
Household Income ◽  
Middle Age ◽  
Age Groups ◽  
Positive Association ◽  
Demographic Variables ◽  
Age Group ◽  
Significant Positive Association ◽  
Social Surveys ◽  
The Relationship

ABSTRACTAlthough the factors that influence people's perception of happiness have long been a focus for scholars, research to date has not offered conclusive findings on the relationships between income, age and happiness. This study examined the relationship between money and happiness across age groups. Analysing data from United States General Social Surveys from 1972 to 2006, this study finds that even after controlling for all the major socio-demographic variables, income (whether household income or personal equivalised income) had a significant positive association with happiness for young and middle-age adults, but it was not the same case with older adults. After controlling for the major socio-demographic variables, there was no evidence of a significant relationship between income (whichever definition) and happiness for older adults. The results also showed that the effect of household income on happiness was significantly smaller for older adults than for young or middle-age adults in the model controlling for major socio-demographic variables. The relationship between household income and happiness no longer differed significantly across age groups after social comparison variables were included. The relationship between equivalised income and happiness did not vary significantly by age group after controlling for the major socio-demographic variables.

scholarly journals Interleukin-4 gene polymorphism (C33T) and the risk of the asthma: a meta-analysis based on 24 publications

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Danyal Imani ◽  
Mohammad Masoud Eslami ◽  
Gholamreza Anani-Sarab ◽  
Mansur Aliyu ◽  
Bahman Razi ◽  
...  
Keyword(s):  
Risk Factor ◽  
Subgroup Analysis ◽  
Meta Analysis ◽  
Age Groups ◽  
Positive Association ◽  
Interleukin 4 ◽  
Reliable Estimate ◽  
Significant Positive Association ◽  
Asthma Risk ◽  
Allelic Model

Abstract Background Previous studies evaluated the association of IL-4 C33T polymorphism and risk of bronchial asthma but failed to establish a consistent conclusive association. In the present meta-analysis, we intend to define a more reliable estimate of the association in the presence of filling published literature. Methods An exhaustive search in Web of Science, Scopus, and PubMed databases was performed to identify all relevant publications before September 2020, and 24 publications (28 studies) with 6587 cases and 8408 controls were included in final analysis. The association between polymorphism and risk of asthma were measured by Odd ratios (ORs) and 95% confidence intervals (CIs). Moreover, Cochran’s Q and the I2 statistics were used to evaluate the degree of heterogeneity between studies. Results In the overall study populations, a significant positive association was detected under all genotype models and announced the IL-4 C33T polymorphism as a potential risk factor in the pathogenesis of asthma. In the subgroup analysis by age, a significant association between IL-4 C33T polymorphism and risk of asthma in different age groups was identified in allelic model, which highlighted the predisposing role of the T allele for the asthma risk in all three age groups. Furthermore, the results of subgroup analysis by continent were heterogenous. Accordingly, IL-4 C33T polymorphism was a risk factor in Europeans (all models except heterozygote comparison), Americans (all models except recessive and homozygote comparison) and Asians (just recessive and allelic model). Finally, the ethnicity-specific analysis disclosed a significant association between IL-4 C33T polymorphism and asthma risk in Caucasians (all genotype models except heterozygote comparison), while this association was not significant in African-Americans. Conclusions This study suggests that IL-4 C33T polymorphism potentially acts as a risk factor for asthma in different ethnicities and age groups.

Abstract 377: Retrograde Shear Stress does not Alter Endothelial Function in Healthy Subjects

2015 ◽  
Vol 35 (suppl_1) ◽  
Author(s):  
Sooraj Shah ◽  
Stuart Katz
Keyword(s):  
Shear Stress ◽  
Endothelial Function ◽  
Healthy Subjects ◽  
Flow Mediated Dilation ◽  
Retrograde Flow ◽  
Experimental Conditions ◽  
Before And After ◽  
Arm Elevation ◽  
The Difference ◽  
Retrograde Shear

Introduction: Endothelial dysfunction is a precursor and plays a significant role in development of atherosclerosis. Retrograde flow and resulting retrograde shear stress has been shown to adversely affect the endothelial function but the results may be flawed due to experimental conditions. Change in the limb position might result in increase in retrograde flow and adversely affect endothelial function. We hypothesized that elevation of arm above the level of the heart will result in increased retrograde flow and reduced endothelial function as measured by flow mediated dilation (FMD). Methods: We enrolled 27 healthy subjects after obtaining informed consent. Endothelial function was measured by FMD in brachial artery before and after arm elevation with elbow support for 30 minutes in fasting state. Flow velocities were recorded and analyzed at baseline, 10 and 20 minutes after arm elevation and at the end of 30 minutes. Results: The mean retrograde flow velocity was 9.9 ± 7.75 cm/sec at baseline, which increased to 15.8 ± 6.56 cm/sec (p=0.0019) after arm elevation. Out of the 27 subjects 21 (78%) subjects had increase in retrograde flow (20% or more). The difference in FMD change between the groups with increased or no change in retrograde flow was statistically non-significant (p=0.4). Conclusion: In conclusion arm elevation for 30 minutes was associated with statistically significant increase in retrograde flow without significant change in endothelial function in normal healthy subjects. The change in endothelial function between subjects who had augmented retrograde shear and those who did not was statistically not significant.

Regulation of PGLYRP1 and TREM-1 during Progression and Resolution of Gingival Inflammation

2019 ◽  
Vol 4 (4) ◽  
pp. 352-359 ◽  
Author(s):  
A. Silbereisen ◽  
A.K. Hallak ◽  
G.G. Nascimento ◽  
T. Sorsa ◽  
G.N. Belibasakis ◽  
...  
Keyword(s):  
Positive Association ◽  
Population Based ◽  
Enzyme Linked Immunosorbent Assay ◽  
Gingival Inflammation ◽  
Multilevel Regression ◽  
Significant Positive Association ◽  
Peptidoglycan Recognition Protein ◽  
Whole Saliva ◽  
Proinflammatory Responses ◽  
The Difference

Introduction: The triggering receptor expressed on myeloid cells 1 (TREM-1) signaling pathway is stimulated by bacteria and, together with its putative ligand peptidoglycan recognition protein 1 (PGLYRP1), propagates proinflammatory responses. Objectives: We aimed to evaluate the TREM-1/PGLYRP1/interleukin (IL)–1β regulation in response to biofilm accumulation and removal in an experimental human gingivitis model. Methods: The study (n = 42 participants, mean age: 23.8 ± 3.7 y) comprised a recruitment step (day –14) followed by experimentally induced biofilm formation (induction [I] phase, day 0 to +21) and a 2-wk resolution (R) phase (day +21 to +35). Plaque was recorded by the Modified Quigley and Hein Plaque Index (TQHPI), while records of gingival inflammation were based on the Modified Gingival Index (MGI). Unstimulated whole saliva supernatants (n = 210, 5 time points) were tested for TREM-1, PGLYRP1, and IL-1β by enzyme-linked immunosorbent assay. Results: During the I-phase, concentrations of all analytes showed a tendency for downregulation at day +7 compared to day 0. TREM-1 (P = 0.019) and PGLYRP1 (P = 0.007) increased significantly between day +7 and day +21. Although all analyte levels decreased during the R-phase, the difference was not significant except TREM-1 being at borderline significance (P = 0.058). Moreover, TREM-1, PGLYRP1, and IL-1β showed significant positive correlations (P < 0.0001) with each other. The study participants were grouped into “fast” and “slow” responders based on clinical gingival inflammation scores. At each time point, fast responders showed significantly higher concentrations of TREM-1 (P < 0.025), PGLYRP1 (P < 0.007), and IL-1β (P < 0.025) compared to slow responders. Mixed-effects multilevel regression analyses revealed that PGLYRP1 (P = 0.047) and IL-1β (P = 0.005) showed a significant positive association with the MGI scores. Conclusion: The study demonstrated that TREM-1 and PGLYRP1 are regulated in response to biofilm accumulation and removal, and fast responders demonstrated higher levels of these analytes compared to slow responders. Knowledge Transfer Statement: The results of this study demonstrated the suitability of salivary TREM-1 and PGLYRP1 to reflect biofilm accumulation and removal and PGLYRP1 to monitor the progression and resolution of inflammation in gingivitis-susceptible individuals (fast responders). Combined with conventional risk factors, the molecular toolbox proposed here should be further validated in future studies to confirm whether it can be used for population-based monitoring and prevention of gingivitis.

scholarly journals Attention Biases to Threat in Infants and Parents: Links to Parental and Infant Anxiety Dispositions

2021 ◽  
Author(s):  
Evin Aktar ◽  
Cosima A. Nimphy ◽  
Mariska E. Kret ◽  
Koraly Pérez-Edgar ◽  
Maartje E. J. Raijmakers ◽  
...  
Keyword(s):  
Age Groups ◽  
Attention Bias ◽  
Positive Association ◽  
Early Years ◽  
Emotional Expressions ◽  
Causal Mechanism ◽  
Significant Positive Association ◽  
Cross Sectional ◽  
Fearful Faces ◽  
Infant Attention

AbstractParent-to-child transmission of information processing biases to threat is a potential causal mechanism in the family aggregation of anxiety symptoms and traits. This study is the first to investigate the link between infants’ and parents’ attention bias to dynamic threat-relevant (versus happy) emotional expressions. Moreover, the associations between infant attention and anxiety dispositions in infants and parents were explored. Using a cross-sectional design, we tested 211 infants in three age groups: 5-to-7-month-olds (n = 71), 11-to-13-month-olds (n = 73), and 17-to-19-month-olds (n = 67), and 216 parents (153 mothers). Infant and parental dwell times to angry and fearful versus happy facial expressions were measured via eye-tracking. The parents also reported on their anxiety and stress. Ratings of infant temperamental fear and distress were averaged across both parents. Parents and infants tended to show an attention bias for fearful faces with marginally longer dwell times to fearful versus happy faces. Parents dwelled longer on angry versus happy faces, whereas infants showed an avoidant pattern with longer dwell times to happy versus angry expressions. There was a significant positive association between infant and parent attention to emotional expressions. Parental anxiety dispositions were not related to their own or their infant’s attention bias. No significant link emerged between infants’ temperament and attention bias. We conclude that an association between parental and infant attention may already be evident in the early years of life, whereas a link between anxiety dispositions and attention biases may not hold in community samples.

Sociodemographic correlates of eating disorder subtypes among men and women in France, with a focus on age

2018 ◽  
Vol 73 (1) ◽  
pp. 56-64 ◽  
Author(s):  
Valentina A Andreeva ◽  
Marie-Pierre Tavolacci ◽  
Pilar Galan ◽  
Joel Ladner ◽  
Camille Buscail ◽  
...  
Keyword(s):  
Physical Activity ◽  
Postsecondary Education ◽  
Age Groups ◽  
Positive Association ◽  
Population Level ◽  
Population Based ◽  
Current Smoker ◽  
Significant Positive Association ◽  
Cross Sectional ◽  
Vulnerable Period

BackgroundOn the population level, the association of age and other sociodemographic factors with eating disorders (ED) is unclear.MethodsWe used cross-sectional data from the French general population-based NutriNet-Santé e-cohort (n=49 603 adults; 76.3% women; mean age=50.4±14.6 years). ED were evaluated in 2014 with the 5-item SCOFF screening questionnaire and the Expali algorithmic tool. Likely cases of restrictive, bulimic, hyperphagic and other ED were the dependent variables. Age, marital status, education, occupation, physical activity and smoking were the independent variables. Associations were estimated via gender-stratified multivariable polytomous logistic regression.ResultsAmong women, age displayed inverse linear associations with both restrictive and bulimic ED, underscoring 18–25 years as the most vulnerable period (adjusted OR=3.37, 95% CI: 2.24 to 5.08 for restrictive ED; adjusted OR=2.98, 95% CI: 2.37 to 3.74 for bulimic ED, respectively). A similar association was observed in men regarding bulimic ED. In women, age was not associated with hyperphagic ED for which living alone, low education, low physical activity, being a homemaker/disabled/unemployed/retired, a manual worker or a former/current smoker had increased importance. In men, 18–39 years emerged as the least vulnerable period regarding hyperphagic ED (adjusted OR=0.74, 95% CI: 0.56 to 0.99). Across gender, having postsecondary education had significant inverse associations with all except restrictive ED, whereas being a student had a significant positive association with restrictive ED.ConclusionsThe findings support gender-specific associations of age with four ED subtypes and could inform future prevention initiatives targeting specific ED among specific age groups.Trial registration numberNCT03335644; Pre-results.

scholarly journals Interleukin-4 gene polymorphism (C33T) and the risk of the asthma: A meta-analysis based on 24 studies

2020 ◽  
Author(s):  
Danyal Imani ◽  
Mohammad Masoud Eslami ◽  
Gholamreza Anani Sarab ◽  
Mansur Aliyu ◽  
Bahman Razi ◽  
...  
Keyword(s):  
Risk Factor ◽  
Subgroup Analysis ◽  
Meta Analysis ◽  
Age Groups ◽  
Positive Association ◽  
Interleukin 4 ◽  
Reliable Estimate ◽  
Significant Positive Association ◽  
Asthma Risk ◽  
Allelic Model

Abstract Background: Previous studies evaluated the association of IL-4 C33T polymorphism and risk of bronchial asthma but failed to establish a consistent conclusive association. In the present meta-analysis, we intend to define a more reliable estimate of the association in the presence of filling published literature.Methods: An exhaustive search in Web of Science, Scopus, and PubMed databases was performed to identify all relevant publications before September 2020, and 24 publications (28 studies) with 6587 cases and 8408 controls were included in final analysis. The association between polymorphism and risk of asthma were measured by Odd ratios (ORs) and 95% confidence intervals (CIs). Moreover, Cochran's Q and the I2 statistics were used to evaluate the degree of heterogeneity between studiesResults: In the overall study populations, a significant positive association was detected under all genotype models and announced the IL-4 C33T polymorphism as a potential risk factor in the pathogenesis of asthma. In the subgroup analysis by age, a significant association between IL-4 C33T polymorphism and risk of asthma in different age groups was identified in allelic model, which highlighted the predisposing role of the T allele for the asthma risk in all three age groups. Furthermore, the results of subgroup analysis by continent were heterogenous. Accordingly, IL-4 C33T polymorphism was a risk factor in Europeans (all models except heterozygote comparison), Americans (all models except recessive and homozygote comparison) and Asians (just recessive and allelic model). Finally, the ethnicity-specific analysis disclosed a significant association between IL-4 C33T polymorphism and asthma risk in Caucasians (all genotype models except heterozygote comparison), while this association was not significant in African-Americans.Conclusions: This study suggests that IL-4 C33T polymorphism potentially acts as a risk factor for asthma in different ethnicities and age groups.

scholarly journals Interleukin-4 gene polymorphism (C33T) and the risk of the asthma: A meta-analysis based on 24 studies

2020 ◽  
Author(s):  
Danyal Imani ◽  
Mohammad Masoud Eslami ◽  
Gholamreza Anani Sarab ◽  
Mansur Aliyu ◽  
Bahman Razi ◽  
...  
Keyword(s):  
Risk Factor ◽  
Subgroup Analysis ◽  
Meta Analysis ◽  
Age Groups ◽  
Positive Association ◽  
Interleukin 4 ◽  
Reliable Estimate ◽  
Significant Positive Association ◽  
Asthma Risk ◽  
Allelic Model

Abstract Background: Previous studies evaluated the association of IL-4 C33T polymorphism and risk of bronchial asthma but failed to establish a consistent conclusive association. In the present meta-analysis, we intend to define a more reliable estimate of the association in the presence of filling published literature.Methods: An exhaustive search in web of science, Scopus, and PubMed databases was performed to identify all relevant publications before September 2020, and 24 publications (28 studies) with 6587 cases and 8408 controls were included in final analysis. The association between polymorphism and risk of asthma were measured by Odd ratios (ORs) and 95% confidence intervals (CIs). Moreover, Cochran Q and the I2 statistics were used to evaluate the degree of heterogeneity between studiesResults: In the overall study populations, a significant positive association was detected under all genotype models and announced the IL-4 C33T polymorphism as a potential risk factor in the pathogenesis of asthma. In the subgroup analysis by age, a significant association between IL-4 C33T polymorphism and risk of asthma in different age groups was identified in allelic model, which highlighted the predisposing role of the T allele for the asthma risk in all three age groups. Furthermore, the results of subgroup analysis by continent were heterogenous. Accordingly, IL-4 C33T polymorphism was a risk factor in Europeans (all models except heterozygote compression), Americans (all models except recessive and homozygote compression) and Asians (just recessive and allelic model). Finally, the ethnicity-specific analysis disclosed a significant association between IL-4 C33T polymorphism and asthma risk in Caucasians (all genotype models except heterozygote comparison), while this association was not significant in American-Africans.Conclusions: This study suggests that IL-4 C33T polymorphism potentially acts as a risk factor for asthma in different ethnicities and age groups.

scholarly journals The Relation between Visceral and Subcutaneous Fat to Bone Mass among Egyptian Children and Adolescents

2014 ◽  
Vol 2 (4) ◽  
pp. 573-578
Author(s):  
Sahar A. El-Masry ◽  
Nayera E. Hassan ◽  
Rokia A. El-Banna ◽  
Mohamed S. El Hussieny
Keyword(s):  
Bone Mass ◽  
Visceral Fat ◽  
Subcutaneous Fat ◽  
Age Groups ◽  
Positive Association ◽  
Fat Distribution ◽  
Z Score ◽  
Significant Positive Association ◽  
Egyptian Children ◽  
Positive Correlations

BACKGROUND: The relation between fat distribution and bone mass is still being debated in children and adolescents.AIM: To verify the influence of both visceral and subcutaneous fat on bone mass among Egyptian children and adolescents.SUBJECTS AND METHODS: The study involved 78 (38 boys and 40 girls) individuals from children (42) and adolescents (36), aged 8-17 years. They were divided into 2 age groups: children group (20 boys and 22 girls) aged 8-12 years and adolescent group (18 boys and 18 girls) aged 13-17 years. Anthropometric measurements, visceral and subcutaneous fat (measured by ultrasound), body composition, BMD and BMC (Measured by DXA), were attempted.RESULTS: Among children, significant positive correlations between visceral fat; in males; and subcutaneous fat; in females; with total BMC, BMD and its Z-score were revealed. After exclusion of age effect, the association between visceral fat in females with total BMD and its Z-score and lumbar BMD-Z-score became significant.  For adolescents, no correlation was observed between either visceral or subcutaneous fat with any parameter of bone mass.CONCLUSIONS: Visceral and subcutaneous fat had significant positive association with bone mass in children; males and females respectively. On the contrary such association disappeared during adolescence.

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