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PubMed2001

Agricultural pesticide use in California: pesticide prioritization, use densities, and population distributions for a childhood cancer study.

Several studies have suggested an association between childhood cancer and pesticide exposure. California leads the nation in agricultural pesticide use. A mandatory reporting system for all agricultural pesticide use in the state provides information on the active ingredient, amount used, and location. We calculated pesticide use density to quantify agricultural pesticide use in California block groups for a childhood cancer study. Pesticides with similar toxicologic properties (probable carcinogens, possible carcinogens, genotoxic compounds, and developmental or reproductive toxicants) were grouped together for this analysis. To prioritize pesticides, we weighted pesticide use by the carcinogenic and exposure potential of each compound. The top-ranking individual pesticides were propargite, methyl bromide, and trifluralin. We used a geographic information system to calculate pesticide use density in pounds per square mile of total land area for all United States census-block groups in the state. Most block groups (77%) averaged less than 1 pound per square mile of use for 1991-1994 for pesticides classified as probable human carcinogens. However, at the high end of use density (> 90th percentile), there were 493 block groups with more than 569 pounds per square mile. Approximately 170,000 children under 15 years of age were living in these block groups in 1990. The distribution of agricultural pesticide use and number of potentially exposed children suggests that pesticide use density would be of value for a study of childhood cancer.

Adolescent↗
PubMed2002

Environmental justice and regional inequality in southern California: implications for future research.

Environmental justice offers researchers new insights into the juncture of social inequality and public health and provides a framework for policy discussions on the impact of discrimination on the environmental health of diverse communities in the United States. Yet, causally linking the presence of potentially hazardous facilities or environmental pollution with adverse health effects is difficult, particularly in situations in which diverse populations are exposed to complex chemical mixtures. A community-academic research collaborative in southern California sought to address some of these methodological challenges by conducting environmental justice research that makes use of recent advances in air emissions inventories and air exposure modeling data. Results from several of our studies indicate that communities of color bear a disproportionate burden in the location of treatment, storage, and disposal facilities and Toxic Release Inventory facilities. Longitudinal analysis further suggests that facility siting in communities of color, not market-based "minority move-in," accounts for these disparities. The collaborative also investigated the health risk implications of outdoor air toxics exposures from mobile and stationary sources and found that race plays an explanatory role in predicting cancer risk distributions among populations in the region, even after controlling for other socioeconomic and demographic indicators. Although it is unclear whether study results from southern California can be meaningfully generalized to other regions in the United States, they do have implications for approaching future research in the realm of environmental justice. The authors propose a political economy and social inequality framework to guide future research that could better elucidate the origins of environmental inequality and reasons for its persistence.

Air Pollutants↗
PubMed2003

High body burdens of 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) in California women.

Following our first report on elevated polybrominated diphenyl ether (PBDE) concentrations in California women, we expanded our investigation to include diverse groups of local women. We analyzed additional adipose and serum samples collected in the late 1990s from San Francisco Bay Area women participating in a breast cancer study and in a reproductive study, respectively. Adipose samples (n = 32) were analyzed by low-resolution mass spectrometry in negative-ion chemical ionization mode, whereas serum samples (n = 50) were analyzed by dual-column gas chromatography with electron capture detection. The results confirmed our earlier findings. Concentrations of 2,2,4,4 -tetrabromodiphenyl ether (BDE-47) in contemporary California women ranged between 5 and 510 ng/g lipid, with a median (16.5 ng/g lipid) 3-10 times higher than those reported from Europe. In contrast, PBDEs were not measurable in any of 420 archived serum samples collected in the 1960s from San Francisco Bay Area women participating in a study of child development. BDE-47 concentrations did not increase with age or with concentrations of a polychlorinated biphenyl (PCB-153), suggesting other routes of exposure in addition to diet. Rising body burdens of endocrine-disrupting chemicals such as PBDEs may pose a potential public health threat.

Adipose Tissue↗
PubMed2004

Ambient endotoxin concentrations in PM10 from Southern California.

Concentrations of endotoxin in urban air pollution have not previously been extensively characterized. We measured 24-hr levels of PM10 (particulate matter < 10 microm in aerodynamic diameter) and the associated endotoxin component once every 6 weeks for 1 year in 13 communities in Southern California. All the samples collected had detectable PM10 and endotoxin levels. The geometric mean PM10 was 34.6 microg/m3 [geometric SD (GSD), 2.1; range, 3.0-135]. By volume, the endotoxin geometric mean was 0.44 endotoxin units (EU)/m3 (GSD, 3.1; range, 0.03-5.44). Per unit material collected, the geometric mean of endotoxin collected was 13.6 EU/mg (GSD, 3.2; range, 0.7-96.8). No correlation was found between endotoxin concentrations and other ambient pollutants concurrently measured [ozone, nitrogen dioxide, total acids, or PM2.5 (particulate matter < 2.5 micro m in aerodynamic diameter]. PM10 and endotoxin concentrations were significantly correlated, most strongly in summer. Samples collected in more rural and agricultural areas had lower PM10 and mid-range endotoxin levels. The high desert and mountain communities had lower PM10 levels but endotoxin levels comparable with or higher than the rural agricultural sites. By volume, endotoxin levels were highest at sites downwind of Los Angeles, California, which were also the locations of highest PM10. Endotoxin concentrations measured in this study were all < 5.5 EU/m3, which is lower than recognized thresholds for acute adverse health effects for occupational exposures but in the same range as indoor household concentrations. This study provides the first extensive characterization of endotoxin concentration across a large metropolitan area in relation to PM10 and other pollutant monitoring, and supports the need for studies of the role of endotoxin in childhood asthma in urban settings.

Air Pollutants↗
PubMed2004

Proximity of California public schools to busy roads.

Residential proximity to busy roads has been associated with adverse health outcomes, and school location may also be an important determinant of children's exposure to traffic-related pollutants. The goal of this study was to examine the characteristics of public schools (grades K-12) in California (n = 7,460) by proximity to major roads. We determined maximum daily traffic counts for all roads within 150 m of the school using a statewide road network and a geographic information system. Statewide, 173 schools (2.3%) with a total enrollment of 150,323 students were located within 150 m of high-traffic roads (greater than or equal to 50,000 vehicles/day); 536 schools (7.2%) were within 150 m of medium-traffic roads (25,000-49,999 vehicles/day). Traffic exposure was related to race/ethnicity. For example, the overall percentage of nonwhite students was 78% at the schools located near high-traffic roads versus 60% at the schools with very low exposure (no streets with counted traffic data within 150 m). As the traffic exposure of schools increased, the percentage of both non-Hispanic black and Hispanic students attending the schools increased substantially. Traffic exposure was also related to school-based and census-tract-based socioeconomic indicators, including English language learners. The median percentage of children enrolled in free or reduced-price meal programs increased from 40.7% in the group with very low exposure to 60.5% in the highest exposure group. In summary, a substantial number of children in California attend schools close to major roads with very high traffic counts, and a disproportionate number of those students are economically disadvantaged and nonwhite.

Adolescent↗
PubMed1997

Air pollution and emergency room visits for asthma in Santa Clara County, California.

During the winters of 1986-1987 through 1991-1992, rainfall throughout much of Northern California was subnormal, resulting in intermittent accumulation of air pollution, much of which was attributable to residential wood combustion (RWC). This investigation examined whether there was a relationship between ambient air pollution in Santa Clara County, California and emergency room visits for asthma during the winters of 1988-1989 through 1991-1992. Emergency room (ER) records from three acute-care hospitals were abstracted to compile daily visits for asthma and a control diagnosis (gastroenteritis) for 3-month periods during each winter. Air monitoring data included daily coefficient of haze (COH) and every-other-day particulate matter with aerodynamic diameter equal to or less than 10 microns (PM10, 24-hr average), as well as hourly nitrogen dioxide and ozone concentrations. Daily COH measurements were used to predict values for missing days of PM10 to develop a complete PM10 time series. Daily data were also obtained for temperature, precipitation, and relative humidity. In time-series analyses using Poisson regression, consistent relationships were found between ER visits for asthma and PM10. Same-day nitrogen dioxide concentrations were also associated with asthma ER visits, while ozone was not. Because there was a significant interaction between PM10 and minimum temperature in this data set, estimates of relative risks (RRs) for PM10-associated asthma ER visits were temperature-dependent. A 60 micrograms/m3 change in PM10 (2-day lag) corresponded to RRs of 1.43 (95% CI = 1.18-1.69) at 20 degrees F, representing the low end of the temperature distribution, 1.27 (95% CI = 1.13-1.42) at 30 degrees F, and 1.11 (95% CI = 1.03-1.19) at 41 degrees F, the mean of the observed minimum temperature. ER visits for gastroenteritis were not significantly associated with any pollutant variable. Several sensitivity analyses, including the use of robust regressions and of nonparametric methods for fitting time trends and temperature effects in the data, supported these findings. These results demonstrate an association between ambient wintertime PM10 and exacerbations of asthma in an area where one of the principal sources of PM10 is RWC.

Air Pollution↗
PubMed1989

Quality of care in licensed and unlicensed home care agencies: a California case study.

This descriptive study examines quality of care issues among licensed and unlicensed home care agencies in California. Data were collected from interviews with 56 key informants in state and federal agencies, representatives of provider associations, consumer groups, professional associations, licensed and unlicensed home care providers, referral agencies, and legislators. Primary and secondary data from state and federal sources were collected and analyzed. Many problems were found in the quality of services delivered by both licensed and unlicensed agencies. Most respondents were concerned about the potentially serious quality of care problems for consumers who received care from unlicensed agencies. However, the large number of providers and the diversity in provider types offering home care services make it difficult to monitor the quality of care being delivered in the home. The findings indicate that there are similar problems in the quality of services provided by licensed and unlicensed agencies. Licensure does not assure that the quality of services will be adequate. The development of stronger, more uniform standards for licensed and unlicensed agencies in California may provide greater safeguards against the potential for abuse.

California↗
PubMed2004

Nonfatal occupational injury among California farm operators.

We conducted a population-based telephone survey addressing farm-work-related (FWR) injuries among California farm operators. Of 1947 participants (80.4% response), 135 farm operators reported 160 FWR injuries in the preceding year, yielding a one-year cumulative incidence for any FWR injury of 6.9% (95% CI 5.8%-8.2%), or a mean 8.2 FWR injuries per 100 farmers in the preceding year (95% CI 6.8-9.7). Multiple injury events in the same individual occurred more frequently than predicted by chance. Sprains and strains (29.4%) were the most frequently reported injury and predominantly involved the back. Overexertion represented the most frequent external cause (24.2%), followed by machinery (14.3%), falls (13.0%), and animals (12.4%). Factors associated with FWR injury included white ethnicity (OR 3.19; 95% CI 1.38-7.36), increased annual hours worked on the farm, low levels of administrative work, and increased percentage of time working with livestock. FWR injury experience of California farm operators is comparable with that reported for other agricultural populations. Above-expected frequency of multiple injuries supports involvement of personal or environmental risk factors. Preventive efforts should focus on higher-risk groups and preventing overexertion and muscle strain and injury related to machinery, falls, and animals, especially livestock.

Accidents, Occupational↗
PubMed1998

Mortality of adults with developmental disabilities living in California institutions and community care, 1985-1994.

We compared risk factor-adjusted mortality for California adults with developmental disabilities based on 22,576 adults receiving services in California, 1985-1994. Mortality rates were adjusted for factors such as age and level of functioning. Risk factor-adjusted mortality was 72% higher in community care than in institutions. The mortality pattern over the years 1993-1994, which had not previously been studied, was comparable to that of 1985-1992. The substantially increased risk in community care suggests that community settings may be less effective in preventing mortality in this population.

Adult↗
PubMed2004

Promoting accountability: hospital charity care in California, Washington state, and Texas.

Debate as to whether private hospitals meet their charitable obligations is heated. This study examines how alternative state approaches for ensuring hospital accountability to the community affects charitable expenditures and potentially affects access to care for the uninsured. Descriptive and multivariate analyses were used to compare private California hospitals' charity care expenditures with those of hospitals in Texas and Washington state. The key finding from this study is that net of hospital characteristics, market characteristics and community need, Texas hospitals were estimated to provide over 3 times more charity care and Washington hospitals were estimated to provide 66% more charity care than California hospitals. This finding suggests that more prescriptive community benefit or charity care requirements may be necessary to ensure that private hospitals assume a larger role in the care of the uninsured.

California↗
PubMed2005

The relationship between SCHIP enrollment and hospitalizations for ambulatory care sensitive conditions in California.

The State Children's Health Insurance Program (SCHIP) was implemented in 1998, providing new funds for states to cover uninsured children. This study examines the relationship between SCHIP implementation in California and hospitalizations for ambulatory care sensitive conditions (ACSCs), an indicator of primary care access and quality. We use administrative SCHIP enrollment records for urban California counties, linked with corresponding rates of hospitalization for seven ACSCs among children ages 1-18 for 1996-2000. Results from multivariate regression models indicate that increases of 1 percentage point in SCHIP enrollment are associated with reductions of 0.42 ACSC admissions per 100,000 children age 1-18 (p = 0.009). Models that use lagged effects of SCHIP enrollment indicate an even stronger relationship. These are population-level relationships, and translate to much larger effects on the specific population subset that enrolled in SCHIP. These results suggest a strong beneficial effect of SCHIP on primary care among the children covered.

Adolescent↗
PubMedDate not supplied

A comparison of Hispanic and white adolescent females' use of family planning services in California.

CONTEXT: In California, the adolescent birthrate among Hispanics is three times that among whites. Because Hispanics are projected to make up one-half of the state's adolescents by 2020, it is important to determine how cultural and health policy-relevant factors are linked to this group's use of family planning services. METHODS: Data from the 2001 California Health Interview Survey were used to examine characteristics of Hispanic and white females aged 14-17, including patterns of use of family planning services in the past year. Multivariate logistic regression analyses were conducted to assess the association between selected characteristics and use of family planning services. RESULTS: Compared with white adolescents, Hispanic adolescents came from poorer families, had a poorer health status, less commonly had a regular source of primary health care and had lower rates of alcohol and drug use, and of sexual experience. Although the proportion of sexually experienced Hispanics who had used family planning services was similar to that of whites (34% and 27%, respectively), the proportion who had ever been pregnant and used such services was significantly larger (42% vs. 9%). In the multivariate analysis, Hispanic adolescents who had ever been pregnant were significantly more likely than whites who had not to have used family planning services in the past year (odds ratio, 11.6). CONCLUSIONS: A need exists for family planning programs to target Hispanic adolescents before they become pregnant, and to send a clear message that contraceptive services are available and should be used before a woman ever has a pregnancy.

Adolescent↗
PubMed2005

Advanced practice clinicians' interest in providing medical abortion: results of a California survey.

CONTEXT: California's Reproductive Health Privacy Act, which became law in January 2003, clarified that advanced practice clinicians could legally provide medical abortion. Little is known about the characteristics associated with nonphysician clinicians' interest in receiving medical abortion training or their perceptions of barriers to medical abortion provision. METHODS: In early 2003, a total of 1,176 licensed advanced practice clinicians in California-nurse practitioners, physician assistants and certified nurse-midwives-completed a mail-in survey assessing their personal characteristics, beliefs and clinical practices. Weighted univariate and bivariate analyses were conducted to describe the respondents, their interest in receiving medical abortion training and their perceptions of barriers to providing such care. RESULTS: One-quarter of respondents desired training in medical abortion. A higher proportion of nurse-midwives than of nurse practitioners or physician assistants desired training (42% vs. 24% and 23%, respectively). The proportion of respondents desiring training also was elevated among clinicians who have prochoice attitudes, those who are familiar with medical abortion and those who spend at least one-third of their time providing care to women of reproductive age. Lack of training opportunities, legal uncertainties and clinical facility constraints were the most frequently reported perceived barriers to provision of medical abortion. CONCLUSIONS: Considerable proportions of advanced practice clinicians-especially of nurse-midwives-may be interested in receiving medical abortion training. Perceived barriers to providing medical abortion are amenable to change. Policies and programs are needed to ensure that interested, committed clinicians can overcome barriers to providing medical abortion for their patients.

Abortion, Legal↗
PubMed2006

Pharmacy access to emergency contraception in California.

CONTEXT: California is one of eight states that allow a woman to obtain emergency contraceptives from a pharmacy without a physician prescription. Because many women do not know about emergency contraception or direct pharmacy access, it is important to understand barriers to getting the method and women's reasons for choosing the pharmacy option. METHODS: In a 2004 survey at 25 predominantly independent pharmacies across California that offered pharmacy access, 426 women completed questionnaires after obtaining emergency contraceptives. They were asked about their reasons for seeking the method, the time of unprotected intercourse, barriers to access, how they learned about pharmacy access and their reasons for choosing it. Chi-square tests and analysis of variance were used to assess differences between subgroups. RESULTS: Eighty-six percent of women wanted emergency contraceptives for immediate use, and women obtained the method an average of 36 hours after unprotected intercourse. Those younger than 16, those who had had unprotected sex on the weekend and those who were embarrassed to ask for the method or who did not know about it all took a longer time to get the medication than did their respective comparison groups. Women who chose pharmacy access did so because they thought it was faster (54%) and more convenient (47%) than seeking a physician prescription. The majority reported that talking to a pharmacist was very helpful (84%) and that it was very important to be able to get the method directly from a pharmacy (81%). CONCLUSIONS: Increasing women's knowledge about emergency contraception and its availability directly from pharmacies has the potential to improve the effectiveness of this contraceptive method by reducing the time interval between unprotected intercourse and initiation of treatment.

Adolescent↗
PubMedDate not supplied

Interest groups and health reform: lessons from California.

We review the 1992 policy choices in California for expanding health insurance coverage, focusing on the rejection of an employer mandate by legislators and voters. We analyze how interest-group politics, gubernatorial politics, and national politics shaped those choices. Although public opinion and the shift of organized medicine showed considerable support for extending health insurance coverage, the opposition of liberal and conservative groups and a foundering economy prevented a significant change in public policy. The president's health reform plan appears to address many of the unresolved concerns in California, but overcoming resistance to any kind of mandate will require skilled leadership and negotiation.

Attitude to Health↗
PubMed1996

Trends in health insurance coverage in California, 1989-1993.

California's uninsurance rate of 22.7 percent is higher than the national average. The state's rate of employment-based insurance coverage--below the national average--is declining because of rising health insurance premiums, falling family incomes, and the changing structure of the economy and the labor market. Growing Medicaid coverage, fostered by expanded eligibility and falling incomes, has prevented rapid growth in the state's uninsured population. Anticipated cutbacks in federal Medicaid funding, however, would increase California's uninsurance rate. Continuing cutbacks in health services for the uninsured would reduce their access to health care and increase stress on many private health services.

Adolescent↗
PubMed1996

The social and health characteristics of California cities.

This DataWatch presents information from nationally recognized sources on sociodemographic characteristics, crime, and hospitals for the sixteen largest cities in California. Recognizing that effective health system changes will require attention to these critical issues, the report identifies their status in a single year and documents changes since 1980. It also provides comparisons among these cities and for the 100 largest U.S. cities. Synthesis of information indicates a wide range in status among these cities for most characteristics but concludes that, on a number of specific measures, the largest California cities have lost ground compared with their U.S. city counterparts.

Adolescent↗
PubMed1996

Hospital employment trends in California, 1982-1994.

During the 1980s California hospitals responded to selective contracting, growth in managed care, and the Medicare prospective payment system (PPS) by controlling their level of spending. This DataWatch examines whether these hospitals achieved these savings by changing the number and/or the mix of hospital employees. We examined employment trends because wages represent the largest component of hospital budgets and because the number and mix of personnel can be changed in the short run. Analysis of the California Health Facilities Cost Report data shows that employment increased steadily during 1982-1994. There is no evidence that hospitals responded to growing competition by altering the rate of growth in hospital personnel and only weak evidence that they altered the mix of personnel by hiring a greater proportion of nonclinical staff. We conclude that increased competition had only a minor effect on hospital employment decisions.

California↗