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Biomedical subjects

C B McCoy

Publications and source records attributed to C B McCoy.

At least 73 records · Page 4Linked to original sources

Economic evaluation of breast cancer screening: A review.

PURPOSE: The authors provide a review of the economic evaluation literature of breast cancer screening and identify important trends and gaps in the literature. OVERVIEW: Healthcare resources are limited and economic evaluation plays a critical role in resource allocation, healthcare policy, and clinical decisions. Many economic evaluations of medical practice, however, are unreliable and do not use appropriate analytic techniques. Three important trends were observed. First, two economic evaluation methods are dominant. Second, a wide range of cost estimates exists across studies. Third, a lack of standardization exists across studies with regard to basic economic evaluation principles. These findings should be considered when conducting future research, analyzing economic evaluations of breast cancer screening, and developing clinical guidelines. CLINICAL IMPLICATIONS: Concerns about cost containment in healthcare make it necessary for physicians and clinical administrators to take an active role in resource allocation decisions at the clinical level. For instance, the recent debate on the proper age to begin annual mammography screening involves both resource allocation and clinical issues. Thus, it is important for physicians and clinical administrators to be familiar with the economic evaluation literature of breast cancer screening, economic evaluation methodology, and the associated shortcomings of published estimates.

Age Distribution↗

High-risk sex behavior among young street-recruited crack cocaine smokers in three American cities: an interim report. The Multicenter Crack Cocaine and HIV Infection Study Team.

Since crack cocaine appeared in urban areas in the United States in the mid-1980s, reports have suggested that crack smokers may be at increased risk of sexually transmitted diseases (STDs), including infection with HIV, because they have multiple sex partners, trade sex for money or drugs, and rarely use condoms. A cross-sectional survey is being conducted in urban neighborhoods in Miami, New York and San Francisco--where crack use is common--to explore these issues. Indigenous street outreach workers are recruiting men and women who are either current regular crack smokers or who have never smoked crack; each group is further stratified according to whether participants had ever injected drugs. Participants were interviewed about their sexual and drug-use practices. Overall, crack smokers, whether injectors or not, engaged in higher-risk sexual behaviors than nonsmokers, reported greater numbers of sex partners than nonsmokers, and were more likely than nonsmokers to have exchanged sex for money or drugs or to have had an STD. Differences between crack smokers and nonsmokers were generally greater among non-injectors than among injectors, and generally greater among women than among men. Condom use, although somewhat more common with paying than nonpaying partners, was infrequent overall. Most of the subjects had not been in substance abuse treatment in the preceding 12 months, and a majority had never been in substance abuse treatment. Education and prevention programs specifically targeted at crack smokers not currently in substance abuse treatment are needed to reach these high-risk persons.

Adult↗

Crack cocaine use and sexual activity in Miami, Florida.

Data are analyzed from the Multicenter Study of Crack Cocaine and HIV Infection in Miami, Florida, examining interrelationships among use of crack cocaine, use of other drugs, sexual activity, and exchange of sex for money and drugs. This study was designed to recruit two groups of approximately equal size: persons who reported current use of crack cocaine three or more times per week, and those who had never used crack. Participants (N = 641) were recruited in Miami. Participants' median age for first use of crack cocaine was higher than for use of alcohol, marijuana or powdered cocaine. It was also higher than participants' ages at first sexual activity, and somewhat higher than the median age for reporting initiation of trading sex for money or drugs. The median age of first crack use was lower among younger participants, suggesting that crack use in older participants followed quickly upon availability of the drug. Crack users reported reduced desire for sex and diminished ability to have sex after smoking crack. However, crack use was associated with increased sexual activity, trading sex for money or drugs, and sex with multiple partners. Participants who traded sex for money or drugs (traders) reported higher rates of condom use than nontraders; however, neither traders nor nontraders reported rates of condom use sufficient to substantially reduce the transmission of sexually transmitted diseases and HIV infection.

Adolescent↗

Crack use and correlates of use in a national population of street heroin users. The National AIDS Research Consortium.

Traditionally, researchers and clinicians have viewed street heroin users as representing an end point in a drug-using career. It is toward this population that major national treatment efforts have been directed. Concomitant with the historical national concern about heroin use has been concern about the increase in crack cocaine use. There has been speculation that crack use may have become a substitute for the higher risk of heroin injection. This article examines the impact of crack use in a national population of heroin users. It was consistently found that there was a correlation between the frequency of crack use and the frequency of speedballing as well as the use of other forms of cocaine, amphetamines, and marijuana. There was also a positive relationship between frequency of crack use and such HIV risk behaviors as renting needles and having a large number of sex partners. The data suggest that in this population of heroin users, crack is not a substitute for heroin but rather is a part of a drug-use pattern that includes an increased use of other drugs and increased high-risk behaviors for contracting HIV.

Adolescent↗

Implementation of a family-centered treatment program for substance-abusing women and their children: barriers and resolutions.

Recent federal health financing and health care delivery programs have increased access to alcohol and other drug abuse treatment programs for low-income women, and have provided intervention and prevention services for their children and families. The Village South Families in Transition (FIT) in Miami, Florida, implemented a residential treatment program for women and their children that aims to decrease alcohol and other drug use, reduce reliance on social and health welfare systems, improve functioning in specific life-skill and vocational areas, improve parenting techniques and maternal/child relations, and provide intervention and prevention services for the clients' children in a safe and supportive environment. Program implementation required resolutions to numerous barriers, including securing a facility for women and children; recruiting, hiring and training of staff; establishing and maintaining community linkages; treatment considerations; balancing treatment versus evaluation/research; and critical decisions faced by treatment staff as they modify client-centered programs to incorporate gender-specific and family-centered programs.

Adult↗

HIV-related risk behaviors and seropositivity among homeless drug-abusing women in Miami, Florida.

This article examines the multifaceted interactions among homelessness, HIV, substance abuse, and gender. Data were collected on 1,366 chronic drug users using a nationally standardized validated instrument within the Miami CARES project of a multisite federally funded program. HIV testing accompanied by pretest and posttest counseling was conducted on-site by certified phlebotomists and counselors. In addition to descriptive analyses and corresponding tests of significance, logistic regression analyses were used to clarify the complex associations between the outcome variables of homelessness and HIV, recognizing difficulties of determining temporal sequence. HIV infection was found to be 2.35 times more prevalent among homeless women than homeless men and significantly higher for homeless women. The findings indicate that among women, homelessness and HIV have a highly interactive effect increasing the vulnerability of this population and thus rendering them an extremely important priority population on which to focus public health efforts and programs.

Adolescent↗

Adoption of injection practices in heroin users in Guangxi Province, China.

This preliminary study collected data from 326 heroin users in Guangxi Province, China, in 1997. Logistic regression analysis was performed to identify the risk factors for injection. Survival analysis identified factors independently associated with time from initiation of heroin use to adoption of injection. Four factors were independently associated with injection: number of friends who used heroin in the last year, duration of heroin use, dose of heroin consumed, and total number of times detoxified in drug treatment and rehabilitation centers. Only gender and duration of heroin use were independently associated with time to first injection. Median time to first injection was 11 months for males and 22 months for females. Median time to first injection varied by age. Median time to injection for those who used heroin for more than one year was 8.1 months; it was 19.1 months for on to five years of use, and 40.5 months for more than five years of use. This study's preliminary findings suggest that younger, more recent heroin users, and males are at increased risk of becoming injectors, a major risk behavior for HIV acquisition.

Adolescent↗

Drug use and barriers to use of health care services.

This paper examines barriers to health care utilization and the correlates associated with these barriers. As part of a larger study of health services utilization, the study sample of 1085 including injection drug users, other chronic users of heroin or cocaine, and a demographically similar group who had used neither heroin nor cocaine, was selected based on the criterion of not having received health care for at least one health problem within the previous 12 months. Both categories of chronic drug users were more likely than non-users not to want health care treatment and to put off seeking needed health care.

Adult↗

Primary preventive health care among injection drug users, other sustained drug users, and non-users.

The primary objective of this paper is to investigate the relationship between sustained illicit drug use and the utilization of primary preventive health care. Data from 1254 African-American, Hispanic/Latino, and non-Hispanic/Latino white men and women collected in 1996-1997 were analyzed to determine independent risk factors for the utilization of primary preventive health care that was not received as a result of seeking treatment for a specific health condition. When several demographic, health, and drug use variables were assessed in a logistic regression model, gender, ethnicity, health insurance status, drug use, and alcohol use were independently associated with primary preventive care. Women, Hispanic/Latinos, and persons who had health insurance were more likely to have received primary preventive health care while injection drug users, other sustained drug users, and "heavy" alcohol users were less likely to have used primary preventive health care services in the past year.

Adolescent↗

Using the drug abuse screening test (DAST-10) to analyze health services utilization and cost for substance users in a community-based setting.

The dual purpose of this study was to: (1) determine whether problematic drug users, defined through the Drug Abuse Screening Test (DAST-10), exhibited differences in health services utilization and cost relative to a combined group of non-problematic drug users and non-drug users; and (2) assess whether the findings were similar to those for chronic drug users (CDUs) and injecting drug users (IDUs). Results showed that health services utilization and total cost were very similar for problematic drug users defined through quantity-frequency (i.e., CDU, IDU) and diagnostic (i.e., DAST-10) criteria. Findings suggest that quantity/frequency criteria for problematic drug use were reasonable approximations for diagnostic-based measures.

Adult↗

HIV seroprevalence across the rural/urban continuum.

While the first decade of the AIDS epidemic was characterized by high prevalence rates of AIDS infection in urban areas, there is increasing recognition of the spread of HIV into rural communities in the United States. Data from the Miami CARES cohort collected on 3,555 chronic drug users from 1988 to 1994 provide a unique opportunity to assess sociodemographic characteristics, drug-using behaviors and HIV risk behaviors related to HIV seropositivity in three communities across the rural-urban continuum: Miami, Florida; Belle Glade, Florida and Immokalee, Florida. The three very different communities studied demonstrate that HIV is no respecter of ecological site. The spread of HIV between areas and within areas is specifically correlated with the risk factors including injection drug use, use of crack cocaine, exchange of sex for money, and the rates for sexually transmitted diseases. All of these factors are shown to increase the risk of HIV so that the constellation of these practices helps determine the differential rates and spread of HIV in the three different areas.

Adolescent↗

Behavior changes among crack-using rural and urban women.

This study compared rural and urban crack-using women and examined their responses to two interventions. A prospective cohort study design was employed to assess the effectiveness of standard and innovative HIV prevention interventions on 541 urban and 268 rural women in Florida. Generalized estimating equation analysis, accounting for repeated measures, found that for combined urban and rural samples, the innovative intervention was more effective than the standard for a number of drug and sexual risk behaviors. However, the analysis indicated no significant differences in intervention efficacy between rural and urban women. The results imply that there is a need for similar HIV prevention services in both areas.

Adolescent↗

Crack cocaine use in rural migrant populations: living arrangements and social support.

Correlates of crack cocaine use were studied among a targeted sample of migrant workers and their sexual partners (n = 571) in rural Southern Florida. Employment among men and recent drug-user treatment among men and women are positively related to crack use, as is involvement in crime and prostitution. Among women but not men, living with children is negatively related to crack use. Drug use and HIV prevention programs should intervene with individuals and their families and social groups. Migrant workers and their sexual partners also need effective drug-user treatment with long-term relapse prevention services.

Adult↗

Drug treatment experiences: rural and urban comparisons.

This study sought to investigate treatment-seeking behaviors among drug users in rural populations and how they compare to their urban counterparts. Data for this analysis were drawn from the Miami and Immokalee sites of the National Institute on Drug Abuse's Cooperative Agreement Program for AIDS outreach/intervention research study targeting high-risk out-of-treatment injection drug users and crack smokers. Findings indicate that Miami subjects were 2.57 times more likely to have been in drug treatment compared to their rural counterparts. This differential may be explained in terms of the availability, accessibility, and acceptability of health care services.

Adult↗

Treating substance-using women and their children in public housing: preliminary evaluation findings.

The Key West Housing Authority created SafePort, a residential substance abuse treatment program within public housing to provide drug treatment to parenting women. All family members-women, children, and significant others-receive comprehensive assessments to determine appropriate therapeutic interventions to resolve their problems. Preliminary evaluation findings suggest that women who participate with their children are more likely to remain drug free than are those who participated without their children.

Adult↗

Mobile mammography: the technologist's role.

This article discusses the role of the radiologic technologist in a mobile mammography screening program targeted at the economically disadvantaged in Dade County, Fla. It describes the development of process, structure and outcome standards used to guide and evaluate both the program and the radiologic technologist within this setting, highlighting the technologists' valuable contributions to the program.

Allied Health Personnel↗

Effects of migration on cancer incidence and resources for prevention and treatment in Florida.

Migration adds a complex dimension to the task of those who plan and allocate resources for health care. The authors offer a methodology for estimating the contribution of migration to the incidence of cancer, allow for age- and sex-specific cancer risks, and estimate, by country, the impact of recent migration on the annual incidence of cancer in Florida. Cancer and migration data were used to develop estimates of the number of cancer cases for Florida counties that were attributable to recent migrants. A net gain and loss ratio was calculated for new cancer cases in 1980 resulting from the 1975-80 migration pattern. Florida data was used because that State has one of the highest crude cancer incidence rates in the nation, is one of the most populous States, and has a population growth from migration rather than from natural increase. Preliminary findings on the relationship between cancer health services resources and net cancer rates from migration are discussed. County cancer health services resources had a strong positive relationship to population size, but the impact of migration on cancer incidence was in a curvilinear relationship to population size.

Cancer Care Facilities↗