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PubMed2006

The influence of provider sex on neurologists' annual incomes.

OBJECTIVE: We sought to determine the influence of provider sex on neurologists' annual incomes after controlling for work effort, provider characteristics, and practice characteristics. METHODS: We used survey responses collected throughout the 1990s from 216 actively practicing neurologists and linear regression modeling to determine the independent influence of provider sex on neurologists' annual incomes. RESULTS: White female neurologists reported seeing 11% fewer visits and working 6% fewer annual hours than their white male counterparts. White female neurologists had practiced medicine for fewer years than white males (p = 0.01). In addition, females were less likely to be employees, as opposed to having an ownership interest in the practice, and were more likely to be board certified, though not statistically significantly so. After adjustment for work effort, provider characteristics, and practice characteristics, white female neurologists' mean annual income was 165,321 dollars, or 47,854 dollars (22%) lower than that for white males (95% CI: 82,710 dollars lower to 12,997 dollars lower, p = 0.007). CONCLUSION: During the 1990s, female sex was associated with lower annual incomes among neurologists. Just as policymakers are exploring sex differences in access to and outcomes health care, they should further explore these findings to ensure that income differences among physicians who provide that care are not unjustly driven by provider sex.

Certification↗

PubMed2006

Relationships between income, subjective health and caregiver burden in caregivers of people with dementia in group living care: a cross-sectional community-based study.

BACKGROUND: Family caregivers of relatives with dementia report higher level of psychological distress than other caregivers and report their self-related health as poorer than that of comparison groups. AIMS AND OBJECTIVES: The purpose of the study was to examine characteristics of family caregivers and to assess whether income, subjective health, age and relationship were associated with the burden of care they experienced. SETTING: Group living units in southern Sweden. PARTICIPANTS: Fifty caregivers who served as informal caregivers of relatives with dementia in group living care. DESIGN: Interviews regarding economic and social conditions and well-evaluated scales for health and caregiver burden (CB) were used. RESULTS: The majority of the family caregivers were adult children, and twice as many were female than were males. The investigation showed that total burden, strain and disappointment, adjusted for health and age, were related to income. Disappointment showed a relation to subjective health. The adult children showed a significantly higher degree of total burden, irrespective of age, compared to other family caregivers. Low income was associated with a higher degree of burden among adult children. However, elderly participants experienced less of burden than younger ones. CONCLUSION: Our findings indicate that caregivers with low health profile and low income, especially adult children, are associated with higher CB. RELEVANCE TO CLINICAL PRACTICE: People with coexisting risk factors (low income, low perceived health) are the ones who may benefit most from health-oriented interventions.

Adaptation, Psychological↗

PubMed2004

The effects of racial density and income incongruity on pregnancy outcomes.

This study shows that living in a better area reduces the risk of adverse pregnancy outcomes but, among African-American women, living in an area in which they are in a racial minority may increase the risk. Using the 1991 cohort of single infants born to African-American women in Chicago, we measured census tract socioeconomic status and defined women as having "positive income incongruity" if they lived in wealthier tracts than the average African-American woman of comparable education and marital status. We examined whether or not the effect of positive income incongruity differed according to whether or not African-American women lived in predominantly black, or mixed tracts. Among the women living in predominantly black census tracts, positive income incongruity was associated with a lower risk of low birth weight (odds ratio (OR)=0.91) and preterm delivery (OR=0.83). These effects were modest, but statistically significant for gestation (p-value=0.01). In contrast, among the women living in mixed tracts positive income incongruity was not associated with low birth weight (OR=1.04) or preterm delivery (OR=1.11). In mixed areas the expected benefits of positive income incongruity are completely offset by the racial density effect, suggesting that the positive effects of a better socioeconomic context may be countered for minority women by the adverse effects of racism or racial stigma.

Adolescent↗

PubMed2005

Income inequality and weight status in US metropolitan areas.

Prior empirical studies have demonstrated an association between income inequality and general health endpoints such as mortality and self-rated health, and findings have been taken as support for the hypothesis that inequality is detrimental to individual health. Unhealthy weight statuses may function as an intermediary link between inequality and more general heath endpoints. Using individual-level data from the 1996-98 Behavioral Risk Factor Surveillance System, we examine the relationship between individual weight status and income inequality in US metropolitan areas. Income inequality is calculated with data from the 1990 US Census 5% Public Use Microsample. In analyses stratified by race-sex groups, we do not find a positive association between income inequality and weight outcomes such as body mass index, the odds of being overweight, and the odds of being obese. Among white women, however, we do find a statistically significant inverse association between inequality and each of these weight outcomes, despite adjustments for individual-level covariates, metropolitan-level covariates, and census region. We also find that greater inequality is associated with higher odds for trying to lose weight among white women, even adjusting for current weight status. Although our findings are suggestive of a contextual effect of metropolitan area income inequality, we do not find an increased risk for unhealthy weight outcomes, adding to recent debates surrounding this topic.

Adult↗

PubMed2005

Psychosocial stress and social support as mediators of relationships between income, length of residence and depressive symptoms among African American women on Detroit's eastside.

Patterns of mental health are clearly associated with life circumstances, including educational and economic opportunities, access to safe and supportive neighborhoods, socially structured exposures to stressors and to supportive relationships. In this article, we examine the social and economic correlates of depressive symptoms among African American women residing within a predominantly African American urban neighborhood in Detroit, USA, with relatively few economic resources. We identify distinct stressors associated with financial strain, neighborhood social disorder (concern about police responsiveness, safety stress), and experiences of discrimination. We test the extent to which each of these stressors mediates relationships between household income, length of residence in the neighborhood, social support and depressive symptoms. Our results suggest that for women in this racially segregated area with a high concentration of poverty, relationships between household income and symptoms of depression are partially mediated by financial stress and social support, but that stressors associated with neighborhood disorder and discrimination influence depressive symptoms independent of household income. Furthermore, we find that length of residence in the neighborhood is negatively associated with financial stress and positively associated with police stress and social support, with no significant net effect on symptoms of depression. We conclude that higher household income may help reduce symptoms of depression by reducing financial stress and strengthening social support even within neighborhoods with high concentrations of poverty. However, increased household income does not protect African American women residing in a high poverty community from distress associated with neighborhood disorder or experiences of discrimination.

Adult↗

PubMed2004

Colorectal cancer screening, 1997-1999: role of income, insurance and policy.

BACKGROUND: Receipt of age-appropriate cancer screens can lead to reduced incidence and mortality. Yet, low-income and uninsured experience barriers to screening. This paper examines colorectal cancer rates by income, racial and insured groups 1997 and 1999. These years focus on changes pre/post a 1998 policy change for Medicare beneficiaries that reduced their out-of-pocket costs for colorectal screening. METHODS: The 1997 and 1999 Behavioral Risk Factor Surveillance System (BRFSS) survey is used to examine changes in age-appropriate fecal-occult blood testing (FOBT), flexible sigmoidoscopy screens. Differences in the odds that Medicare beneficiaries, relative to private insured, receive screens pre/post 1998 are examined using multivariate logit models. RESULTS: Average rates of sigmoidoscopy increased significantly during 1997-1999 but remain below desired levels. While Medicare beneficiaries are more likely than privately insured to be screened, gaps between low- versus high-income groups in both Medicare and non-Medicare populations remain. The 1998 Medicare policy change was associated with a significant increase in the odds of screening among low-income (<$25,000) Medicare beneficiaries. CONCLUSIONS: Policy makers should consider reasons for continued low colorectal screening rates among all insured groups. Barriers such as patient perceptions and physician advice should be considered along with the vulnerability that low income and lack of insurance imposes.

Colorectal Neoplasms↗

PubMed2003

Family income a strong predictor of coronary heart disease events but not of overall deaths among Turkish adults: a 12-year prospective study.

OBJECTIVE: The objective of this study was to assess whether family income affected future deaths and coronary heart disease (CHD) events. DESIGN: A prospective population-based survey (the Turkish Adult Risk Factor study) was used. SETTING: The setting was numerous communities in all geographic regions of Turkey surveyed between 1990 and 2001/2002. SUBJECTS: The subjects were a random sample of 2704 men and women 20 years of age or over at baseline examination. METHOD: Monthly family incomes were categorized by the participants into four increasing brackets. Information on the mode of deaths was obtained from first-degree relatives and/or health personnel of the local heath office. The diagnosis of definite or suspected CHD among survivors was based on history, physical examination of the cardiovascular system, and Minnesota coding of resting ECGs. CHD event was defined as newly developed fatal or nonfatal myocardial infarction, new onset stable angina, and/or myocardial ischemia following the baseline survey. After exclusion of participants with CHD at onset, 250 deaths and 297 fatal and nonfatal CHD occurred among 2704 men and women (mean age 41.6+/-15) during a mean 10.0 years of follow-up. MAIN RESULTS: All-cause deaths failed to be significantly associated with income brackets in logistic regression analysis when adjusted for age, sex, and three major risk factors. Systolic blood pressure and cigarette smoking were significant independent predictors of overall mortality. In regard to fatal and nonfatal CHD, even after adjusting for age, sex and three major risk factors, a significant excess was noted in the two lowest brackets as opposed to the high income bracket (relative risk 1.56 and 1.75, respectively, P<0.03). CONCLUSIONS: Family income in the Turkish community was not predictive of overall mortality, but was strongly predictive of future CHD events independent of age, sex, and three major factors, posing a huge coronary risk on the individual and the society.

Adult↗

PubMed2000

Income-related inequality in life-years and quality-adjusted life-years.

We estimate the income-related inequality in Sweden with respect to life-years and quality-adjusted life-years (QALYs). We use a large data set from Sweden with over 40,000 individuals followed up for 10-16 years, to estimate the survival and quality-adjusted survival in different income groups. For both life-years and QALYs, we discover inequalities in health favouring the higher income groups. For men (women) in the youngest age-group (20-29 years), the number of QALYs is 43.7 (45.7) in the lowest income decile and 47.2 (49.0) in the highest income decile.

Adult↗

PubMed2003

Income related inequalities in mental health in Great Britain: analysing the causes of health inequality over time.

Using regression techniques this paper estimates the level of income related health inequality in GB in 1992 and 1998. Inequality is decomposed to investigate which socio-demographic factors are important contributors to health differences. The paper includes a range of measured and subjective income variables to control for absolute income. A relative deprivation measure is included to test the impact of income inequality on health inequality. It is found that subjective financial status is a major determinant of ill-health and makes a major contribution to income related inequalities in health. Relative deprivation is an important contributor for women but not for men.

Adult↗

PubMed1999

The distribution of health and income: a theoretical framework.

A general framework is developed to analyse variations in the distribution of population health, where individual health is modelled as a function of income, conditional upon the level of another factor such as health-related behaviour. Results are derived for the response of the level of average health in a population and the degree of health inequality to alternative health promotion policies and equiproportionate income growth. Qualitative results are shown to depend on characteristics of the individual health production functions and the frequency distribution of the other factor at each income level. These results are independent of the distribution of income. The discussion focuses on the implications of these results for contemporary research into inequalities in health and income.

Health Behavior↗

PubMed2002

Radiotherapy services in countries in transition: gross national income per capita as a significant factor.

BACKGROUND AND PURPOSE: The acquisition of radiotherapy by countries in transition (CITs) is an evolutionary process from having no resources whatsoever, to meeting the standards adopted by well-developed countries. The influence of the economic ability of a country to acquire and sustain this technology has intuitively been accepted as a major factor but has not before been subjected to analysis for a large group of countries. This information has been analysed to provide guidance to countries commencing and expanding radiotherapy services. MATERIAL AND METHODS: The number of linear accelerators and (60)Co megavoltage teletherapy machines in 72 CITs, those with gross national income per capita (GNI/cap)<$12000 per annum (pa) and a sample of 12 countries with GNI/cap>$12000 pa were expressed as machines per million population (MEV/mil) and used as an index of the ability of the country to provide a service. This figure was related to GNI/cap. The average populations of 24 further countries without radiotherapy were compared with 21 countries with radiotherapy facilities having the same range of GNI/cap. RESULTS: The relationship log(10) MEV/mil=-2.90+0.85 log(10) GNI/cap was identified between the machines and income. Also verified was that small low income countries were less likely to have the technology than those with large populations. CONCLUSIONS: The increase in the number of teletherapy machines is closely linked to the GNI/cap of a country. Our sample of well developed countries failed to demonstrate a levelling off of equipment acquisition with income. In the lower income group, smaller countries were less likely to have radiotherapy services than those with large populations.

Developing Countries↗

PubMed2003

Income distribution and risk of fatal drug overdose in New York City neighborhoods.

Accidental drug overdose is a substantial cause of mortality for drug users. Neighborhood-level factors, such as income distribution, may be important determinants of overdose death independent of individual-level factors. We used data from the Office of the Chief Medical Examiner to identify all cases of accidental deaths in New York City (NYC) in 1996 and individual-level covariates. We used 1990 US Census data to calculate the neighborhood-level income distribution. This multi-level case-control study included 725 accidental overdose deaths (cases) and 453 accidental deaths due to other causes (controls) in 59 neighborhoods in NYC. Overdose deaths were more likely in neighborhoods with higher levels of drug use and with more unequal income distribution. In multi-level models, income maldistribution was significantly associated with risk of overdose independent of individual-level variables (age, race, and sex) and neighborhood-level variables (income, drug use, and racial composition). The odds of death due to drug overdose were 1.63-1.88 in neighborhoods in the least equitable decile compared with neighborhoods in the most equitable decile. Disinvestment in social and economic resources in unequal neighborhoods may explain this association. Public health interventions related to overdose risk should pay particular attention to highly unequal neighborhoods.

Adolescent↗

PubMed1997

Higher education and income are related to a better Na:K ratio in blacks: baseline results of the Treatment of Mild Hypertension Study (TOMHS) data.

In the United States, blacks have higher rates of hypertension than whites. A possible contributing factor to this higher rate of hypertension could be dietary differences between blacks and whites relating to sodium and potassium intake, which in turn could be related to socioeconomic differences between blacks and whites. Baseline data from the Treatment of Mild Hypertension Study (TOMHS) was used to assess differences in the urinary excretion of sodium and potassium, and the Na:K ratio between black and white participants, and also to explore the relationship of socioeconomic status (SES) and urinary electrolyte excretion within each ethnic group. Participants were men and women ages 45 to 69 with stage I diastolic hypertension (DBP < or = 99 mm Hg). Level of education and annual household income were used as indicators of SES. Two overnight urine samples were collected and analyzed for Na and K at entry on 172 black and 710 white participants. Blacks had a significantly higher mean Na:K ratio than whites, 4.3 v 3.6 (P < .001). This was primarily due to higher urinary Na excretion in blacks than whites, 57.8 v 52.7 mmol/8 h (P = .05). Analysis by education and income level showed that higher levels of urinary Na and Na:K in blacks than whites was restricted to those with lower education and income levels. For higher education and income levels, blacks had slightly lower levels of urinary Na and Na:K than whites. Correspondingly, education and income levels were related to urinary Na and Na:K in blacks but not in whites. This suggests that lower SES blacks could benefit from interventions to reduce dietary Na and increase dietary K, which would decrease their urinary Na:K ratio and may make them less prone to developing hypertension.

Aged↗

PubMed1997

Gender and perceived pay entitlement: testing for effects of experience with income.

This article reports on 2 studies where variations on a research design from the literature on gender and perceived pay entitlement were used to test for effects of past pay experience and salience of the pay experience for the participants. In Study 1, level of previous income was not a predictor of self-payment behavior for women or men, and men allocated more pay to themselves than did women. In Study 2, women and men did not differ on perceived entitlement when the income and work experience were made salient, but they did in the nonsalient condition, as in Study 1. Also, past income and self-pay were positively correlated for women in the salient condition. Further, when the data from Study 1 and Study 2 from the same condition (past income nonsalient) were combined, those with the higher previous income level paid themselves more than others, among both men and women.

Analysis of Variance↗

PubMed2001

The role of street foods in the dietary pattern of two low-income groups in Nairobi.

OBJECTIVES: To examine the frequency of street food consumption of people living in low-income settlements in Nairobi and the role of street foods in their daily diet and to reveal why people consume street foods rather than home-prepared foods. SETTING, SUBJECTS AND METHODS: A cross-sectional descriptive study was done with 1011 households and in-depth interviews with a subsample of 73 households in two selected areas in Nairobi: Korogocho, a low-income slum area and Dandora, a low-middle-income area. RESULTS: The frequency of street food consumption was higher in Korogocho than in Dandora (3.6 vs 2.0 days per week; P<0.001). Street food consumption did not differ between different types of households, with the exception of household size. Employment status of the household head and street food consumption were related (P<0.001): consumption frequency of 3.7 days per week when irregularly or unemployed, 2.9 days/week when self-employed and 2.1 days/week when regularly employed. Furthermore, where an adult woman with primarily a domestic role was present, street food consumption was less (2.55 days per week when present vs 2.95 when not present; P<0.05). CONCLUSIONS: Street foods play an important role in the diet of poor households in Nairobi, in particular for breakfast and snacks, because they are cheap and convenient. The frequency of street food consumption is determined by a combination of at least four factors: level of household income; regularity of income; household size; and time available to prepare meals. SPONSORSHIP: The project is financed by the Netherlands Foundation for the Advancement of Tropical Research (WOTRO), filenumber WV 96-153.

Adult↗

PubMed2004

Factors associated with women's and children's body mass indices by income status.

OBJECTIVE: To describe associations between eating behaviors, dietary intake, physical activity, attitudes toward diet and health, sociodemographic variables and body mass index (BMI) among women and children, and differences by household income. DESIGN: Data from the 1994-1996 Continuing Survey of Food Intakes by Individuals (CSFII) and the Diet and Health Knowledge Survey (DHKS) were examined using multivariate regression to estimate the associations between BMI and behavioral and environmental variables among women and children. SUBJECTS: CSFII 1994-1996 is representative of the US population. DHKS surveyed CSFII respondents 20 y of age and over. Our samples consisted of 2419 adult women and 1651 school-age children. MEASUREMENTS: CSFII respondents reported 24 h recalls of all food intakes on 2 nonconsecutive days and their personal and household characteristics, including self-reported height and weight. DHKS collected data on knowledge and attitudes toward dietary guidance and health from CSFII adult respondents. RESULTS: Significant correlations between women's BMI and age, race, dietary patterns, TV watching, and smoking was observed among women from both low- and high-income households. Beverage consumption, eating out, the importance of maintaining healthy weight, and exercise were correlated with BMI only among women from high-income households. Among children, age, race, income, and mother's BMI were significantly correlated with child BMI. CONCLUSIONS: Among women, the associations between some behavioral and environmental factors and BMI differ by household income. Intervention programs need to target specific eating and physical activity behaviors to promote a healthy body weight.

Adult↗

PubMed2001

Income-based disparities in outcomes for patients with chronic kidney disease.

The impact of income on outcomes for patients with end-stage renal disease (ESRD), who are largely relieved of structural and financial barriers to care, is poorly understood. We conducted a prospective cohort study of 3,165 patients who developed ESRD in the early 1990s to examine whether low-income patients with ESRD have poorer health outcomes than their socioeconomically advantaged counterparts, and, if so, to determine whether greater health insurance can reduce this disparity. We found that increasing neighborhood income was associated with decreased mortality and an increased likelihood of placement on the renal transplant waiting list. The presence of private insurance coverage in addition to Medicare improved rates of listing for transplantation in a graded manner, with the greatest effect among those living in neighborhoods below the 10th percentile of income, but had no effect on socioeconomic disparities in mortality. Our results suggest that low-income patients with ESRD experience persistent financial barriers to transplantation that can be addressed with greater health benefits. However, they also experience higher mortality that is caused by personal and/or environmental factors that differ by social class. Clinicians, researchers, and policymakers must address these social, cultural, psychologic, and environmental determinants of health to improve the survival of patients with ESRD.

Adult↗

PubMed1996

Effects of race and income on mortality and use of services among Medicare beneficiaries.

BACKGROUND: There are wide disparities between blacks and whites in the use of many Medicare services. We studied the effects of race and income on mortality and use of services. METHODS: We linked 1990 census data on median income according to ZIP Code with 1993 Medicare administrative data for 26.3 million beneficiaries 65 years of age or older (24.2 million whites and 2.1 million blacks). We calculated age-adjusted mortality rates and age- and sex-adjusted rates of various diagnoses and procedures according to race and income and computed black:white ratios. The 1993 Medicare Current Beneficiary Survey was used to validate the results and determine rates of immunization against influenza. RESULTS: For mortality, the black:white ratios were 1.19 for men and 1.16 for women (P<0.001 for both). For hospital discharges, the ratio was 1.14 (P<0.001), and for visits to physicians for ambulatory care it was 0.89 (P<0.001). For every 100 women, there were 26.0 mammograms among whites and 17.1 mammograms among blacks. As compared with mammography rates in the respective most affluent group, rates in the least affluent group were 33 percent lower among whites and 22 percent lower among blacks. The black:white rate ratio was 2.45 for bilateral orchiectomy and 3.64 for amputations of all or part of the lower limb (P<0.001 for both). For every 1000 beneficiaries, there were 515 influenza immunizations among whites and 313 among blacks. As compared with immunization rates in the respective most affluent group, rates in the least affluent group were 26 percent lower among whites and 39 percent lower among blacks. Adjusting the mortality and utilization rates for differences in income generally reduced the racial differences, but the effect was relatively small. CONCLUSIONS: Race and income have substantial effects on mortality and use of services among Medicare beneficiaries. Providing health insurance is not enough to ensure that the program is used effectively and equitably by all beneficiaries.

Aged↗