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PubMed1997

Risk for neural tube defect-affected pregnancies among women of Mexican descent and white women in California.

OBJECTIVES: This study investigated a previously reported 50% or more increased risk for neural tube defect-affected pregnancies among Latina women compared with White women. METHODS: Data were derived from a population-based case-control study of fetuses and live-born infants with neural tube defects in a 1989-through-1991 California birth cohort. Interviews were conducted with mothers of 538 (88% of eligible) infants/fetuses with neural tube defects and mothers of 539 (88%) nonmalformed control infants. RESULTS: The risk for a neural tube defect-affected pregnancy was approximately twice as high among women of Mexican descent than among White women (odds ratio = 1.9, 95% confidence interval [CI] = 1.5, 2.8). The odds ratio for Mexico-born Mexican women compared with White women was 2.4 (95% CI = 1.7, 3.2), whereas the risk for US-born women of Mexican and other racial/ethnic descent was not substantially higher than that for Whites. The higher risk among Mexico-born Mexican women was not attributable to differences in numerous studied parental characteristics and exposures. CONCLUSIONS: Given that nearly 20% of all California births are to Mexico-born Mexican women, the increased risks observed are relevant to the population burden of neural tube defects.

Adult↗
PubMed1998

Nighttime observations of safety belt use: an evaluation of California's primary law.

OBJECTIVES: An analysis was conducted to determine what effect California's change to a primary safety belt law had on safety belt use among nighttime weekend drivers. METHODS: Observations of 18,469 drivers in 2 California communities were made during voluntary roadside surveys conducted every other Friday and Saturday night from 9 PM to 2 AM for 4 years. RESULTS: Rates of safety belt use rose from 73.0% to 95.6% (P < .0005). For drivers with blood alcohol concentrations of 0.10 or higher, rates rose from 53.4% to 92.1% (P < .0005). CONCLUSIONS: Because substantial improvement in safety belt use was seen even in a group of high-risk drivers, the injury reduction benefits of this law may be high.

Accidents, Traffic↗
PubMed1998

Validity of insurance information on California birth certificates.

OBJECTIVES: This study assessed the validity of health insurance information on California birth certificates. METHODS: Insurance information from birth certificates and linked face-to-face interviews was compared for 7428 postpartum women in California. RESULTS: There was excellent agreement between insurance information in birth certificate and interview data, especially when capitated plans were grouped with all other private coverage. Analyses using both data sources produced similar estimates of the likelihood of untimely prenatal care according to type of insurance coverage. CONCLUSIONS: Birth certificate data including insurance information appear to be an appropriate resource for examining both the extent of coverage for maternity care and associations between prenatal care use and insurance status.

Birth Certificates↗
PubMed1999

The prevalence of low income among childbearing women in California: implications for the private and public sectors.

OBJECTIVES: This study examined the income distribution of childbearing women in California and sought to identify income groups at increased risk of untimely prenatal care. METHODS: A 1994/95 cross-sectional statewide survey of 10,132 postpartum women was used. RESULTS: Sixty-five percent of all childbearing women had low income (0%-200% of the federal poverty level), and 46% were poor (0%-100% of the federal poverty level). Thirty-five percent of women with private prenatal coverage had low income. Most low-income women with Medi-Cal (California's Medicaid) or private coverage received their prenatal care at private-sector sites. Compared with women with incomes over 400% of the poverty level, both poor and near-poor women were at significantly elevated risk of untimely care after adjustment for insurance, education, age, parity, marital status, and ethnicity (adjusted odds ratios = 5.32 and 3.09, respectively). CONCLUSIONS: This study's results indicate that low-income women are the mainstream maternity population, not a "special needs" subgroup; even among privately insured childbearing women, a substantial proportion have low income. Efforts to increase timely prenatal care initiation cannot focus solely on women with Medicaid, the uninsured, women in absolute poverty, or those who receive care at public-sector sites.

Adolescent↗
PubMed2000

Increasing trends in the use of breast-conserving surgery in California.

OBJECTIVES: The purpose of this study was to determine temporal trends in breast-conserving surgery in California from 1988 through 1995. METHODS: Logistic regression was used to analyze data on 104,466 cases of early-stage breast cancer reported to the California Cancer Registry. RESULTS: A monotonically increasing trend in breast-conserving surgery was detected after adjustment for age, race/ethnicity, stage at diagnosis, and neighborhood education level. Breast-conserving surgery increased at similar rates among all racial/ethnic groups. Older age, Asian or Hispanic race/ethnicity, late-stage diagnosis, and residence in an undereducated neighborhood were factors associated with lower use of breast-conserving surgery. CONCLUSIONS: Although disparities are evident, use of breast-conserving surgery increased steadily in all groups examined in this study.

Adult↗
PubMed2000

The impact of workplace smoking ordinances in California on smoking cessation.

OBJECTIVES: The effect of local workplace smoking laws in California was assessed to determine whether such laws increase smoking cessation. METHODS: Workplace smoking ordinance data from 1990 were appended to 1990 California Tobacco Survey data from 4680 adult indoor workers who were current cigarette smokers or reported smoking in the 6 months before the survey. Ordinance effects on cigarette smoking and worksite policy were estimated by using multiple logistic regression controlling for sociodemographic variables. RESULTS: Smokers who worked in localities with a strong workplace ordinance (compared with no workplace ordinance) were more likely to report the existence of a worksite smoking policy (odds ratio [OR] = 1.6; 95% confidence interval [CI] = 1.2, 2.2) and to report quitting smoking in the prior 6 months (OR = 1.5; 95% CI = 1.1, 1.7). In communities with strong ordinances, an estimated 26.4% of smokers quit smoking within 6 months of the survey and were abstinent at the time of the survey, compared with an estimated 19.1% in communities with no ordinance. CONCLUSIONS: Workplace smoking ordinances increased smoking cessation among employed smokers, indicating that these laws may benefit smokers as well as nonsmokers.

Adolescent↗
PubMed2002

Clean indoor air: advances in California, 1990-1999.

OBJECTIVES: This study assessed progress in achieving clean indoor air in California. METHODS: Data were from large, cross-sectional population-based surveys (1990-1999). RESULTS: Indoor workers reporting smoke-free workplaces increased from 35.0% (95% confidence interval [CI] = 33.7, 36.3) in 1990 to 93.4% (95% CI = 92.6, 94.2) in 1999. Exposure of nonsmoking indoor workers to secondhand tobacco smoke decreased from 29.0% (95% CI = 27.2, 30.8) to 15.6% (95% CI = 14.1, 17.1). Adults with smoke-free homes increased from 37.6 % (95% CI = 35.1, 40.1) in 1992 to 73.7% (95% CI = 73.2, 74.2) in 1999; nearly half of smokers in 1999 had smoke-free homes. In 1999, 82.2% (95% CI = 81.5, 82.9) of children and adolescents (0-17 years) had smoke-free homes, up from 38.0% (95% CI = 35.1, 40.9) in 1992. CONCLUSIONS: California's advances highlight an important opportunity for tobacco control.

Adolescent↗
PubMed2004

Adolescents and firearms: a California statewide survey.

OBJECTIVES: We assessed the prevalence and correlates of adolescents' reports regarding firearms in their homes, of their own, of close friends, and of same-aged peers. METHODS: Random-digit-dialed interviews were conducted with 5801 adolescents as part of the California Health Interview Survey. RESULTS: One fifth (19.6%) of California adolescents reported having a firearm in their homes; few (3.0%) reported having their own gun. Characteristics associated with having one's own gun and with perceptions regarding others' guns generally were consistent with characteristics associated with having a firearm in the home. The 2 exceptions were related to socioeconomic status and to ethnicity. CONCLUSIONS: The source from which adolescents obtain guns, especially adolescents from less wealthy households, merits further investigation. Further research is needed to ascertain the accuracy of Black and Latino adolescents' perceptions regarding handguns among their peers.

Adolescent↗
PubMed2004

Expanded state-funded family planning services: estimating pregnancies averted by the Family PACT Program in California, 1997-1998.

OBJECTIVES: The California Family Planning, Access, Care, and Treatment Program was implemented in 1997 to provide family planning services for uninsured, low-income women and men. We estimated the impact on fertility of providing 500 000 women with contraceptives. METHODS: Paid claims and medical record review data were used to estimate pregnancies averted. Pregnancies women experienced while enrolled in the program and pregnancies they would have experienced given methods used before enrollment were modeled as a Markov process. RESULTS: One year of Family Planning, Access, Care, and Treatment services averted an estimated 108 000 unintended pregnancies that would have resulted in 50 000 unintended births and 41 000 induced abortions. CONCLUSIONS: Providing contraceptives to low income, medically indigent women significantly reduced the number of unintended pregnancies in California.

Abortion, Legal↗
PubMedDate not supplied

Atmospheric methyl tertiary butyl ether (MTBE) at a rural mountain site in California.

Methyl tertiary butyl ether (MTBE) was measured in air samples collected at hourly intervals near Blodgett Forest Research Station on the western slope of the Sierra Nevada, California, in July 1997, October 1998, and June through September 1999. Mixing ratios ranged from below the detection limit (< approximately 0.01 ppbv) to 0.5 ppbv, but were generally less than 0.3 ppbv. At these mixing ratios partitioning of MTBE into surface waters would lead to MTBE concentrations of less than 0.2 microg L(-1). As expected, MTBE mixing ratios were highly correlated with other anthropogenically emitted hydrocarbons. Based on the observed diurnal cycle of MTBE and its ratio to 2-methyl-butane (isopentane), we estimated the average regional daytime oxidant concentration to be (9 to 13) x 10(6) OH radicals per cubic centimeter, consistent with our earlier estimates for this region. Furthermore, MTBE ratios to toluene, another ubiquitous anthropogenic hydrocarbon, were generally consistent with regional transport and dilution, as well as atmospheric oxidation. Exceptions, pertaining to MTBE mixing ratios below or close to the detection limit, were associated with the influence of marine air masses that did not experience anthropogenic hydrocarbon input from California. With all these constraints in place, evidence for an additional atmospheric loss process, such as nonreversible deposition of MTBE, could not be established, and we conclude that any deposition is slow compared with removal from the atmosphere by the OH radical.

Air Movements↗
PubMed2006

Nitrate and sediment fluxes from a California rangeland watershed.

Long-term water quality records for assessing natural variability, impact of management, and that guide regulatory processes to safeguard water resources are rare for California oak woodland rangelands. This study presents a 20-yr record (1981-2000) of nitrate-nitrogen (NO(3)-N) and suspended sediment export from a typical, grazed oak woodland watershed (103 ha) in the northern Sierra Nevada foothills of California. Mean annual precipitation over the 20-yr period was 734 mm yr(-1) (range 366-1205 mm yr(-1)). Mean annual stream flow was 353 mm y(-1) (range 87-848 mm yr(-1)). Average annual stream flow was 48.1 +/- 16% of precipitation. Mean annual NO(3)-N export was 1.6 kg ha(-1) yr(-1) (range 0.18-3.6 kg ha(-1) yr(-1)). Annual NO(3)-N export significantly (P < 0.05) increased with increasing annual stream flow and precipitation. Mean daily NO(3)-N export was 0.004 kg ha(-1) d(-1) (range 10(-5) to 0.55 kg ha(-1) d(-1)). Mean annual suspended sediment export was 198 kg ha(-1) yr(-1) (range 23-479 kg ha(-1) yr(-1)). There was a positive relationship (P < 0.05) between annual suspended sediment export, annual stream flow and precipitation. Mean daily suspended sediment export was 0.54 kg ha(-1) d(-1) (range 10(-4) to 155 kg ha(-1) d(-1)). Virtually no sediment was exported during the dry season. The large variation in daily and annual fluxes highlights the necessity of using long-term records to establish quantitative water quality targets for rangelands and demonstrates the difficulty of designing a water quality monitoring program for these ecosystems.

California↗
PubMedDate not supplied

Association of urban runoff with coastal water quality in Orange County, California.

The associations between storm events, urban runoff, and coastal water quality have not been well investigated. A temporal and spatial analysis of 2 years of data was conducted to determine associations between urban river discharge and indicator bacteria levels for Southern California beaches and evaluate the contribution of anomalous precipitation to the association. Data show beaches next to rivers had the highest bacterial levels in both wet and dry seasons. Bacterial levels rose substantially across all sites during wet months, and river discharge and bacterial levels were all highest during the winter with the most rainfall. Precipitation was significantly associated (Spearman rank bivariate correlation, P < 0.01) with water discharged from the rivers. River discharge was significantly associated with bacterial levels at 20 out of 22 beaches, with the strongest associations at sites next to rivers. The results indicate that urban river discharge is a primary source of Southern California's coastal water pollution and, as a result, swimming at beaches near rivers may pose a significant public health risk. The strong association found between precipitation and water pollution may be relevant to studies of potential health effects associated with climate change.

Bathing Beaches↗
PubMed1990

AIDS education and prevention programs for intravenous drug users: the California experience.

The state of California, pursuant to 1985 legislation, established the California AIDS Program (CAP) within the state Office of AIDS. As part of this program, the Office of AIDS contracts with public and private agencies to provide AIDS education to specific target groups throughout the state. Intravenous drug users (IVDUs) constitute one of the target populations singled out for special attention by the state. This article, based on a statewide evaluation, describes the AIDS education programs for IVDUs funded by the Office of AIDS. The types of educational interventions used are presented, both for IVDUs in treatment and those not in treatment. The unique problems in reaching this target population are also discussed. The article concludes that the state is making a good effort to reach IVDUs, but that further educational and evaluative efforts are needed. Specifically, the individual educational programs must move beyond the transmission and evaluation of cognitive knowledge about AIDS to an assessment of the attitudes that impede behavior change.

Acquired Immunodeficiency Syndrome↗
PubMed2006

Comparative attractiveness of two chicken breeds to mosquitoes in southern California.

Each transmission season (April-October), mosquito control districts deploy more than 2,000 white leghorn hens as sentinels in California's arbovirus surveillance program. In 2002, Rhode Island red hybrids were used instead, because of insufficient availability of leghorns. Although arboviral seroconversions occurred in both breeds, their attractiveness to host-seeking mosquitoes was not compared. During August and September 2004, Florida Medical Entomology Laboratory traps, each containing 1 hen, were deployed twice weekly at each of 4 fixed locations at a southern California wetland area. The breed at each location was alternated each trap-night to account for intersite variation in the mosquito population. Six chickens of each breed were rotated through the traps to account for interchicken variation in mosquito attractiveness. Although the mosquito counts varied significantly among trap locations, no significant difference was found between the 2 breeds. Sera collected biweekly detected seroconversions to Flavivirus in 4 of 6 red and 1 of 6 white chickens, not a statistically significant difference. Larger sample sizes or experimental infection of different chicken breeds may identify differences in their response to arbovirus infection.

Animals↗
PubMed1979

Methadone programs and crime reduction: a comparison of New York and California addicts.

Methadone patients in Santa Clara County (California) and Brooklyn (New York)--Addiction Research and Treatment Corporation (ARTC)--were evaluated to determine the extent of reductions in individual and community-wide criminal activity. Findings showed an overall decline in official (recorded) arrests for Brooklyn patients in a 3-year follow-up period. California patients showed similar declines in a 2-year follow-up period. Assault rates for both populations showed less of a decline. It was found that Brooklyn patients were arrested less frequently but for more severe offenses across preaddiction, addiction, and post-program entry periods. Criminal complaints to the police in the ARTC area were not reduced as compared to surrounding precincts. Individual and program performance characteristics were examined for Brooklyn patients in relation to reductions in criminal activity. A better preprogram drug history and decreased drug use while on the program were related significantly to decreased criminal activity for male and female patients, and older patients had slightly better outcomes. It was concluded that future programs should utilize more aggressive outreach techniques, including epidemiologic methods, to reach younger addicts, and that stable programs relying on central screening and a range of services would be required for success with them.

Adult↗
PubMed2005

A comparison of three animal welfare assessment programs on California dairies.

Due to increased awareness of animal welfare issues by consumers, 3 voluntary programs were developed to assess animal welfare on commercial dairies in the United States. These programs include: 1) Humane Farm Animal Care (HFAC), with minimum standards and a third-party audit system; 2) Dairy Quality Assurance Center (DQAC); and 3) University of California-Davis (UCD) program with self-assessments. The objective of this article was to provide an overview of the similarities and differences in content and scope of these programs. Furthermore, to ascertain the practical application of these programs on commercial dairies, a study was designed to compare the rank order of compliance scores of each program on 10 commercial California dairies using a survey and personal interviews with dairy owners or managers. The survey combined 316 statements from the DQAC checklist, the UCD assessment, and the HFAC standards. The mean (+/-SD) percentage compliance for the DQAC, HFAC, and UCD programs was 83 +/- 8, 94 +/- 3, and 85 +/- 6%, respectively. A ranking order from 1 to 10 was assigned to each dairy using the compliance score for each assessment program. Comparisons of ranking order between programs were not significant, indicating that different indices were being measured by each program. All programs, however, identified the same 2 lowest-ranking dairies, which indicated that the programs were able to identify facilities with the weakest welfare practices. The survey results show that selection of the available assessment programs for animal welfare on the dairy is important in determining the outcomes.

Animal Welfare↗
PubMedDate not supplied

Seroepidemiology of Bartonella vinsonii subsp. berkhoffii infection in California coyotes, 1994-1998.

The prevalence of antibodies to Bartonella vinsonii subsp. berkhoffii in coyotes (Canis latrans) in California ranged from 51% in central to 34% in southern and 7% in northern California. Seropositive coyotes were more likely to be from coastal than inland counties (p clustered distribution of Bartonella seropositivity in coyotes suggests that B. vinsonii subsp. berkhoffii infection is vectorborne. Further investigation is warranted to evaluate which arthropods are vectors and what the mode of transmission is from wildlife to domestic dogs and possibly humans.

Animals↗
PubMed2002

Eastern equine encephalomyelitis virus infection in a horse from California.

A yearling quarter horse, which was raised in southern California, received routine vaccinations for prevention of infection by Eastern equine encephalomyelitis virus (EEEV). One week later, severe neurologic signs developed, and the horse was humanely destroyed. A vaccine-related encephalomyelitis was later suspected. A final diagnosis of EEEV infection was established on the basis of acute onset of the neurologic signs, histopathologic and serologic testing, and isolation and molecular characterization of EEEV from brain tissue. The vaccine was extensively tested for viral inactivation. Nucleotide sequences from the vaccine and the virus isolated in the affected horse were also compared. In California, arboviral encephalomyelitides are rarely reported, and EEEV infection has not previously been documented. This report describes the occurrence of EEEV infection in the horse and the investigation to determine the source of infection, which was not definitively identified.

Animals↗