جستجوی مقالات مرتبط با کلیدواژه "race" در نشریات گروه "پزشکی"

Rotary systems have made significant advances to improve their root canal preparation efficacy. These instruments can properly preserve the root canal anatomy and morphology. The present in vitro study aimed to compare canal transportation and centering ability of RaCe and Af f-one systems using cone-beam computed tomography.

Thirty-six mandibular molars were included. The samples were randomly assigned to two groups (n=18): group 1, RaCe, and group 2, Af f-one. Canal preparation was conducted using the respective files according to the manufacturers’ instructions. The cone-beam computed tomographic scanning of the samples was performed before and after preparation. The data were analyzed by using two-way ANOVA.

In both the RaCe and Af f-one rotary systems, canal centrality and transportation were similar at coronal, middle, and apical cross-sections. In addition, canal transportation and centrality were identical in the RaCe and Af f-one rotary files (P<0.05).

The two studied rotary systems did not exhibit significant differences in root canal transportation and preservation of root canal centrality in the apical, middle, and coronal thirds

High income is a protective factor against suicidality for children, youth, and adults, however, recent research has documented weaker health effects of high income for Black than White individuals, a pattern also called marginalization-related diminished returns (MDRs). In this study, we tested racial variation in the association between high income and suicidality in a national sample of 9-10-year-old Black and White American children. This cross-sectional study used data from the Adolescent Brain Cognitive Development (ABCD) study, which included 7298 White or Black children between the ages of 9 and 10. Of all the participants, 5652 were White and 1646 were Black. The predictor variable was family income, treated as a continuous measure. Race was the moderator. The outcome variable was suicidality, treated as a dummy variable, reflecting any positive suicidal thoughts or behaviors endorsed over the lifecourse. Covariates included sex, age, family structure (parental marital status), parental education, trauma, history of depression, neighborhood poverty, and family conflict. Logistic regression was used for data analysis. Overall, family income was inversely associated with children’s suicidality, net of all covariates. A statistically significant interaction was found between race and family income, suggesting that the inverse association between family income and suicidality is weaker in Black than White children. The observed weaker association between income and suicidality in Black than White children suggests that family income does not provide the same protection against suicidality for Black as White children. Due to racism, income and some other socioeconomic status indicators show weaker than expected health effects on Black families in the US.

Idiopathic granulomatous mastitis (IGM) is a challenging exclusion diagnosis for breast lesions, manifested as benign, chronic inflammation of the breast tissue. Although some evidence suggest that IGM cases are not uniformly distributed worldwide, few investigations have specifically addressed this topic. This study aims to examine the distribution of IGM cases among countries and races/ethnicities based on reported cases.

A review of studies with a report of at least one IGM patient published from 2011 to 2020 inclusive was conducted. The search was performed in MEDLINE, and citations were filtered in two stages by title/abstract and full text. Those cases with a positive growth of pathogens, male granulomatous mastitis and review articles were excluded.

Among 365 retrieved publications, 218 were finally included based on the inclusion and exclusion criteria, comprising 7161 patients from 34 different countries. Turkey, the United States, and China were the countries where the most publications (including case reports) originated. Considering the number of patients within papers, Turkey, Iran, and China were the pioneers.

Based on the published literature, some populations seem to be more prone to IGM. Further investigations may reveal the genetic and environmental factors associated with this disease in different geographic areas

Both RaCe and Mtwo rotary systems introduced the 10/0.04 file as the first file used in the root canal (Glide path). This study aims to compare different factors of both the rotary systems, including cutting efficacy, file fracture, topography changes of files, and changes of the root canal.

In this laboratory study, 12 RaCe and 12 Mtwo files were prepared and tested on 24 resin blocks with 30° curvature. The time to reach the working length was recorded. Topographical changes of the files have been observed with a stereomicroscope if needed. Changes in resin blocks were measured by photographing and using Photoshop software. Data were analyzed through an independent two-sample t test and likelihood-ratio chi-squared test.

Time to reach the working length was significantly lower in the RaCe group than in the Mtwo group (3.57 ± 0.56 s vs. 10.33 ± 2.25 s, P < 0.001). File fracture did not occur in any of the two rotary systems. Topographical changes of the files in RaCe group were also less than the Mtwo group (P=0.032).

The RaCe file is faster in reaching the working length. Both files are safe and do not cause drastic changes in the root canal.

Perceived discrimination (PD) is a risk factor of suicidal thoughts and behaviors (STB) for children, youth, and adults. However, it is unknown whether the association between PD and STB frequency differs between African American (AA) and Non-Hispanic White children.

In this study, we compared AA and non-Latino White children for the association between PD and STB frequency in a national sample of 9-10-year-old American children.

This cross-sectional study used data from the Adolescent Brain Cognitive Development (ABCD) study, which included 7883 non-Latino White or AA children between the ages of 9 and 10. The predictor variable was frequency of PDs. Race was the moderator. The outcome variable was STB frequency, treated as a count variable, reflecting positive STB items endorsed over the life-course. Covariates included sex, age, marital status, household income, parental education, parental employment, trauma, and economic difficulties. Poisson regression was used for data analysis.

Of all the participants, 5994 were non-Latino Whites, and 1889 were AAs. Overall, PD frequency was positively associated with STB frequency. A statistically significant interaction was found between race and PD, suggesting that the association between PD and STB frequency is weaker in AA than non-Latino White children.

The observed weaker association between PDs frequency and STB frequency in AA than non-Latino White children suggests that PD may be a less salient risk factor of STB frequency for AA than non-Latino White children. Researchers should explore factors other than PD for suicide prevention of AA children in the US.

Endometriosis is a chronic, painful disease that can be disabling. There is a scarcity of research on the clinical management and outcomes of endometriosis in American Indian (AI) women. The aim of this study was to determine whether there are discrepancies between AI and White women in symptoms at presentation, initial diagnosis methods, clinical management, and long-term outcomes of endometriosis, in a rural state.

This retrospective study described and compared the clinical management and long-term outcomes of AI and White women diagnosed with endometriosis. All statistical tests were two-tailed with p-value < .05 considered to be significant.

110 women diagnosed with endometriosis were included in the study, with 50% (n = 55) AI and 50% (n = 55) White. White women were more likely to have private insurance (80% vs. 42%; p < 0.001). AI women were more likely than White women to report abdominal pain at diagnosis (20.3% vs. 9%; p = 0.010), and be diagnosed with mild endometriosis symptoms at the initial visit, (44.4% vs. 10%; p = 0.051). White women were more likely to report a reduction or cessation of pain compared to AI women (63.3% vs. 34%; p = 0.004).

We found the majority of women continue to report pain long after endometriosis diagnosis. AI women were less likely to report a reduction or cessation of pain. Future research should investigate why pain is more persistent in AI women.

Prostate cancer screening is more commonly utilized by highly educated people. As shown by marginalization-related diminished returns (MDRs), the effects of socioeconomic status (SES) such as education on the health outcomes are considerably smaller for ethnic minorities than for Whites. The role of MDRs as a source of ethnic health disparities is, however, still unknown. The current study had two first, to explore the association between years of schooling and having taken a prostate-specific antigen (PSA) test among men in the US, and second, to explore ethnic differences in this association. This study was a secondary analysis of data from the National Health Interview Survey (NHIS-2015). The data of 5,053 men aged 55 years or older who were either Latino, non-Latino, African–American, or White were analyzed. Years of schooling was the independent variable. The dependent variable was taking a PSA test sometime during one’s lifetime. Age, region, and employment were the control variables. Ethnicity was the focal moderating variable. Binary logistic regression was used for data analysis. A higher number of years of schooling was associated with higher odds of having taken a PSA test, net of all confounders. Ethnicity showed a significant statistical interaction with years of schooling on having taken a PSA test. This interaction was suggestive of a smaller slope for Latino men than non-Latino men. White and African American men did not show differential effects of years of schooling on having taken a PSA test. Similar to the MDRs patterns in other domains, non-Latino White men show more health gain from their years of schooling than Latino men. Highly educated Latino men still need programs to encourage their use of prostate cancer screening.

According to the sponge hypothesis, compared to men’s self-rated health (SRH),women’s SRH is more likely to reflect conditions other than chronic medical conditions (CMCs) suchas psychiatric disorders (PDs). As a result, poor SRH is a weaker predictive factor for mortality risk forwomen than men. Most of this literature, however, is done in samples that are predominantly middleclassWhite. To test the sponge hypothesis among economically disadvantaged African Americans(AAs), this study compared low-income AA men and women for the effects of the number of PDs andCMCs on SRH.

This cross-sectional study recruited a non-random sample (n = 150) ofeconomically disadvantaged AA adults with PD(s). Structured face-to-face interviews were used tocollect data. SRH was measured using a single-item measure. PDs and CMCs were also self-reported.We applied linear regression models to test the interactions between SRH and the number of PDs andCMC as well as gender.

The number of PDs and CMCs were associated with SRH in the pooled sample of low-incomeAA adults with PD(s). However, we found a significant interaction between the number of PDs andgender. This interaction suggested a stronger association between PDs and SRH for AA women thanAA men. Gender did not alter the association between the number of CMCs and SRH.

The number of PDs is a determinant of SRH for low-income AA women but not AA men,supporting the sponge hypothesis.

The evaluation of racial disparities in access to and use of infertility services in the U.S. has been documented. The aims of this study were to: 1) investigate racial differences in length of time women report attempting to become pregnant until seeking medical help; and 2) determine the predictors of seeking medical help to achieve pregnancy.

The National Survey of Family Growth 2011-2015 was used to analyze the duration women attempted to get pregnant among those who sought medical help.

563 women reported seeking medical help to achieve pregnancy. The majority 422 (81%) were white. Multiple linear regression showed that age (β = .93; p = .00), having less than high school education (β = 14.64; p = .01), and higher body mass index (β = .59; p = .00) are significantly associated with an increased length of time for seeking medical help to get pregnant. Religions other than Catholic or Protestant (β = -8.63; p = .04) is significantly associated with a decreased length of time for seeking medical help to get pregnant. Race was not associated with a significant difference in the length of time attempting to become pregnant (β = -1.80; p = .44).

Age, education attainment, religious affiliation, and body mass index are significantly associated with the length of time pursuing pregnancy. Once women have utilized medical resources, racial differences in the length of time pursuing pregnancy are not apparent.

As suggested by the Minorities’ Diminished Return Theory, the associationbetween socioeconomic status and health is weaker for racial and ethnic minorities compared toWhites. The current study compared Blacks and Whites in terms of the association between maritalstatus and physical health. The State of the State Survey (SOSS) included 881 adults (92 Blacks and 782 Whites)generalizable to the state of Michigan, the United States. The marital status and self-rated physical health(SRPH), which was measured using a single item, were considered as independent and dependentvariables, respectively. In addition, age, gender, education, and employment were covariates and race/ethnicity was regarded as the moderating factor. Finally, logistic regression was used for data analysis. Based on the results, being married was associated with better SRPH, which is the netconsidered by all confounders. A significant interaction was found between race and marital status onSRPH, suggesting a larger association for Blacks compared to Whites. In race stratified models, maritalstatus was related to better SRPH for Whites and Blacks, but the magnitude of this link was larger forBlacks compared to Whites. Overall, marital status was differently linked to SRPM for Whites and Blacks. Accordingly,policymakers should be cautious while not assuming that diverse racial and ethnic groups with similareconomic resources have similar health status.

Some research has shown that general sense of mastery (i.e., sense of control over the forces that impact one's life) does not have universal causes and consequences in racial groups. For instance, sense of mastery better predicts depression and mortality for non-Hispanic Whites (NHWs) than that of African-Americans (AAs). The objective of this study was to test the heterogeneity in the association between the sense of mastery and income by race in a nationally representative sample of NHW and AA adults. This study included a total of 3570 AA and 891 NHW adults who were enrolled to the National Survey of American Life. Variables included race/ethnicity, age, gender, socioeconomic status (SES and household income), and sense of mastery. Linear regression models were applied in the overall sample and also by race. Overall, high sense of mastery was associated with high household income. In race-specific models, higher levels of sense of mastery were associated with high household income in AAs but not NHWs. Racial differences exist in how sense of mastery and income are correlated. It is not clear whether high income generates more sense of mastery for AAs or high sense of mastery is more essential for generating high income for AAs. Policy makers and clinicians should be aware that SES and sense of mastery are differently linked in AAs and NHWs.

As suggested by the Minorities’ Diminished Returns (MDRs) theory, educational attainment shows a weaker protective effect for racial and ethnic minority groups compared to non-Hispanic Whites. This pattern, however, is never shown for hospitalization risk. This cross-sectional study explored racial and ethnic variations in the association between educational attainment and hospitalization in the United States. Data came from the National Health Interview Survey (NHIS 2015). The total sample was 28,959 American adults. Independent variables was educational attainment. The main outcome was hospitalization during the last 12 months. Age, gender, employment, marital status, region, obesity, and number of cardiovascular conditions were covariates. Race and ethnicity were the effect modifiers. Logistic regression models were utilized to analyze the data. From all participants, 16.2% were Black and 11.6% were Hispanic with a mean age of 51 years. Overall, higher education levels were associated with lower odds of hospitalization, independent of all confounders. Educational attainment showed significant interactions with race (odds ratio [OR] =1.04, 95% CI = 1.01-1.08) and ethnicity (OR = 1.04, 95% CI =1.01-1.07) on hospitalization, indicating smaller protective effects of educational attainment on hospitalization of Hispanics and Blacks than non-Hispanic Whites. The protective effects of educational attainment on population health are smaller for Blacks and Hispanics compared to non-Hispanic Whites. To prevent health disparities, the diminished returns of educational attainment should be minimized for racial and ethnic minorities. To do so, there is a need for innovative and bold economic, public, and social policies that do not limit themselves to equalizing socioeconomic status, but also help minorities leverage their available resources and gain tangible outcomes.

To explore racial and ethnic variation in the effects of parental educational attainment on students’ grade point average (GPA) in the US. As suggested by the Minorities' Diminished Returns (MDR) theory, socioeconomic status (SES) systemically results in smaller outcomes for non-Whites compared to Whites. We still know very little about diminished trans-generational returns of SES resources such as parental educational attainment. For example, the differential impacts of parental educational attainment on school performance of youth from various racial and ethnic backgrounds are still unknown.

The Population Assessment of Tobacco and Health (PATH 2013 - 2014) is a nationally representative survey in the US. The total sample was 10,701 youth (12-17 years old) were enrolled. The independent variable was parental educational attainment. The main outcome was GPA measured using self-report. Age, gender, and parental marital status were the covariates. Race and ethnicity were the effect modifiers. Linear regression models were used to analyze the data.

Overall, higher parental educational attainment was associated with a higher GPA, independent of all possible confounders. Race and ethnicity, however, both showed significant interaction with parental educational attainment on students’ GPA, indicating smaller positive effects of parental educational attainment on students’ GPA for Hispanic and Black compared to non-Hispanic White youth.

The boosting effect of parental educational attainment on GPA is smaller for Black and Hispanic compared to White youth. To minimize diminished returns of parental educational attainment for Black and Hispanic families, there is a need for innovative public and social policies and programs that are not limited to equalizing SES but also address the structural barriers that disproportionately limit upward social mobility of racial and ethnic minority students and their families. The US society should reduce extra costs of upward social mobility for racial and ethnic minority families. As the underlying mechanisms are multifaceted, multi-level approach is needed to undo minorities’ diminished returns, so every individual can gain the same tangible outcome from their SES resources.

Black and Yellow individuals of various ethnic populations may differ in the immunity to infectious diseases. Our study aimed to explore and compare the detailed production characteristics (protein, activity, and affinity) of antibodies against blood group (natural antibodies), hepatitisBvirus (HBV), and Salmonella typhi tofindthe differences in anti-infectious immunity between Black and Yellow populations. Serum samples of Black and Yellow healthy individuals were collected, diluted in serial dilutions, and several immunological methods were used. Entire antibody features of all antibodies were calculated, according to the results obtained for each
dilution. The affinity of natural antibodies, anti-HBs, and S. typhi O antibody was significantly higher among Black individuals than Yellow individuals (P < 0.05). The activity of all antibodies among Blacks was higher than Yellow individuals (P < 0.05). The protein content of all antibodies was significantly higher among Blacks (P < 0.05). Clearly, differences between Black and Yellow individuals for protein, activity, and affinity among different antibodies may lead to exploring the differences in anti-infectious immunity or understanding the incidence of infectious diseases among different races.

As suggests by the Minorities’ Diminished Returns (MDR) theory, educationattainment and other socioeconomic status (SES) indicators have a smaller impact on the health andwell-being of non-White than White Americans. To test whether MDR also applies to happiness, in thepresent study, Blacks and Whites were compared in terms of the effect of education attainment on thelevel of happiness among American adults. General Social Survey (1972-2016) is a series of national surveys that are performed in theUnited States. The current analysis included 54 785 adults (46 724 Whites and 8061 Blacks). The yearsof schooling (i.e., education attainment) and happiness were the main independent variable and themain dependent variable of interest, respectively. In addition, other parameters such as gender, age,employment status, marital status, and the year of the survey were the covariates and race was thefocal effect modifier. Finally, the logistic regression model was used to analyze the data. Based on the results, high education attainment was associated with higher odds of happinessin the pooled sample. Further, a significant interaction was found between race and educationattainment on the odds of happiness, showing a larger gain for Whites compared to Blacks. Racespecificmodels also confirmed this finding (i.e., a larger magnitude of the effect of education forWhites compared to Blacks). Overall, the MDR theory also applies to the effect of education attainment on happiness.Blacks’ disadvantage in comparison to the Whites in gaining happiness from their education may bedue to the structural, institutional, and interpersonal racism and discrimination in the US. Therefore,there is a need for economic and public policies that can minimize the Blacks’ diminished returns ofeducation attainment and other SES resources.

The aim of this study was to compare the cyclic fatigue resistance of XP-endo Shaper, HyFlex CM, FlexMaster and Race rotary instruments at body temperature (37±1°C). Twenty XP-endo Shaper (#30/.01), 20 HyFlex CM (#30/.04), 20 FlexMaster (#30/.04) and 20 Race (#30/.04) instruments were tested at body temperature (n=20). The instruments were evaluated in artificial canals with a 3-mm radius of curvature and 60° angle of curvature to the center of the 1.5-mm-wide canal. Each instrument was rotated until fracture occurred and the number of cycles to failure (NCF) recorded. Data were analyzed using one-way ANOVA and Tukey HSD tests (P<0.05). The difference in the NCF of all the instruments was statistically significant (P<0.05). The order of the instruments from the highest to the lowest NCF was as follows: XP-endo Shaper (3064.0±248.1), HyFlex CM (1120.5±106.1), FlexMaster (569.8±48.4) and Race (445.5±53.5). Under the limitations of the present study, XP-endo Shaper instruments were more resistant to cyclic fatigue than the #30/.04 nickel-titanium rotary instruments immersed in water at simulated body temperature.