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Biomedical subjects

B G Link

Publications and source records attributed to B G Link.

At least 19 recordsLinked to original sources
PubMed2004

Impact of measurement error in the study of sexually transmitted infections.

Measurement is a fundamental part of all scientific research, and the introduction of errors of different sorts is an inevitable part of the measurement process in epidemiological and clinical research. Despite the ubiquity of measurement error in research, the substantial impacts which measurement error can have on data and subsequent study inferences are frequently overlooked. This review introduces the basic concepts of measurement error that are most relevant to the study of sexually transmitted infections, and demonstrates the impacts of several of the most common forms of measurement error on study results. A self assessment test and MCQs follow this paper.

Confounding Factors, Epidemiologic↗
PubMed2001

Stigma as a barrier to recovery: The consequences of stigma for the self-esteem of people with mental illnesses.

OBJECTIVE: The objective of this study was to determine whether stigma affects the self-esteem of persons who have serious mental illnesses or whether stigma has few, if any, effects on self-esteem. METHODS: Self-esteem and two aspects of stigma, namely, perceptions of devaluation-discrimination and social withdrawal because of perceived rejection, were assessed among 70 members of a clubhouse program for people with mental illness at baseline and at follow-up six and 24 months later. RESULTS: The two measures of perceptions of stigma strongly predicted self-esteem at follow-up when baseline self-esteem, depressive symptoms, demographic characteristics, and diagnosis were controlled for. Participants whose scores on the measures of stigma were at the 90th percentile were seven to nine times as likely as those with scores at the 10th percentile to have low self-esteem at follow-up. CONCLUSIONS: The stigma associated with mental illness harms the self-esteem of many people who have serious mental illnesses. An important consequence of reducing stigma would be to improve the self-esteem of people who have mental illnesses.

Adult↗
PubMed2001

Stigma as a barrier to recovery: Adverse effects of perceived stigma on social adaptation of persons diagnosed with bipolar affective disorder.

OBJECTIVE: The purpose of this study was to evaluate the effect of concerns about stigma on social adaptation among persons with a diagnosis of bipolar affective disorder. METHODS: The sample comprised 264 persons who were consecutively admitted to a psychiatric inpatient or outpatient service at a university-affiliated hospital and who met research diagnostic criteria for bipolar I disorder, bipolar II disorder, or schizoaffective disorder, manic type. Patients were evaluated with use of the Schedule for Affective Disorders and Schizophrenia, Lifetime Version (SADS-L), the Brief Psychiatric Rating Scale (BPRS), and a measure of perceived stigma. Social adjustment was measured at baseline and seven months later with the Social Adjustment Scale (SAS). RESULTS: As predicted, patients who had concerns about stigma showed significantly more impairment at seven months on the social leisure subscale but not on the SAS extended family subscale, after baseline SAS score and symptom level had been controlled for. More refined models using SAS-derived factors as dependent variables indicated that concerns about stigma predicted higher avoidance of social interactions with persons outside the family and psychological isolation at seven-month follow-up, after baseline SAS and BPRS scores had been controlled for. CONCLUSIONS: Concerns about the stigma associated with mental illness reported by patients during an acute phase of bipolar illness predicted poorer social adjustment seven months later with individuals outside the patient's family. Greater attention to patients' concerns about stigma is needed from both researchers and clinicians.

Adaptation, Psychological↗
PubMed2001

Stigma as a barrier to recovery: The extent to which caregivers believe most people devalue consumers and their families.

OBJECTIVE: The extent to which 461 caregivers of persons with serious mental disorders believed that most people devalue consumers and their families was assessed, and the magnitude of the relationships between these beliefs and the diagnostic status of consumers was estimated. METHODS: Caregivers of 180 consumers with schizophrenia, major depression, or bipolar disorder and caregivers of 281 consumers with bipolar disorder or schizoaffective disorder, manic type, completed a 15-item instrument comprising two scales: eight of the 15 items operationally defined the devaluation of individual consumers, and seven items operationally defined the devaluation of consumers' families. RESULTS: No significant differences were observed between the two samples on the two devaluation scales or on 14 of the 15 items that constituted the scales. About 70 percent of all caregivers indicated a belief that most people devalue consumers, and 43 percent expressed a belief that most people also devalue the families of consumers. CONCLUSIONS: Strong evidence from previous research indicates that the caregiving role is very demanding, is frequently distressing, and may be harmful to health and injurious to one's quality of life. The addition of a community that is perceived to be rejecting makes life even more difficult for the caregivers and families of people with serious mental disorders. The development and implementation of effective interventions to create more supportive and understanding communities would be a challenging and worthwhile endeavor.

Adult↗
PubMed2000

A multilevel analysis of income inequality and cardiovascular disease risk factors.

Recent research has suggested that inequality in the distribution of income is associated with increased mortality, even after accounting for average income levels. Using data from the Behavioral Risk Factor Surveillance System (BRFSS), we investigated whether inequality in the distribution of income within US states is related to the prevalence of four cardiovascular disease risk factors (body mass index (BMI), history of hypertension, sedentarism, and smoking). Multilevel models (including both state-level and individual-level variables) were used to examine associations of state inequality with risk factor levels before and after adjustment for individual-level income. For three of the four risk factors investigated (BMI, hypertension, and sedentarism), state inequality was associated with increased risk factor levels, particularly at low income levels (annual household incomes <$25,000), with associations persisting after adjustment for individual-level income. Inequality was also positively associated with smoking, but associations were either stronger or only present at higher income levels. Associations of inequality with the outcomes were statistically significant in women but not in men. Although not conclusive, findings for three of the four risk factors are suggestive of a contextual effect of income inequality, particularly among persons with lower incomes.

Adult↗
PubMed2000

Assessing problems with religious content: a comparison of rabbis and psychologists.

This study measured distinctions made by a sample of clergy and mental health professionals in response to three categories of presenting problems with religious content: mental disorder, religious or spiritual problem, and "pure" religious problem. A national, random sample of rabbis (N = 111) and clinical psychologists (N = 90) provided evaluations of three vignettes: schizophrenia, mystical experience, and mourning. The participants evaluated the religious etiology, helpfulness of psychiatric medication, and seriousness of the presenting problems. The rabbis and psychologists distinguished between the three diverse categories of presenting problems and concurred in their distinctions. The results provide empirical evidence for the construct validity of the new DSM-IV category religious or spiritual problem (V62.89). Use of the V code allows for more subtle distinctions among the variety of problems that persons bring to clergy and mental health professionals. These distinctions may also provide a foundation for the initiation of co-professional consultation.

Attitude of Health Personnel↗
PubMed1999

A longitudinal investigation of social causation and social selection processes involved in the association between socioeconomic status and psychiatric disorders.

Social causation theory and social selection theory have been put forth to explain the finding that low socioeconomic status (SES) is associated with risk for psychiatric disorders. The predictions of both theories were investigated using data from a community-based longitudinal study. Psychosocial interviews were administered to 736 families from 2 counties in New York State in 1975, 1983, 1985-1986, and 1991-1993. Results indicated that (a) low family SES was associated with risk for offspring anxiety, depressive, disruptive, and personality disorders after offspring IQ and parental psychopathology were controlled, and (b) offspring disruptive and substance use disorders were associated with risk for poor educational attainment after offspring IQ and parental psychopathology were controlled. These findings indicate that social causation and social selection processes vary in importance among different categories of psychiatric disorders.

Adolescent↗
PubMed1999

Dispelling the stigma of schizophrenia: II. The impact of information on dangerousness.

This study addressed a relatively neglected topic in schizophrenia: identifying methods to reduce stigma directed toward individuals with this disorder. The study investigated whether presentation of information describing the association between violent behavior and schizophrenia could affect subjects' impressions of the dangerousness of both a target person with schizophrenia and individuals with mental illness in general. Subjects with and without previous contact with individuals with a mental illness were administered one of four "information sheets" with varying information about schizophrenia and its association with violent behavior. Subjects then read a brief vignette of a male or female target individual with schizophrenia. Results showed that subjects who reported previous contact with individuals with a mental illness rated the male target individual and individuals with mental illness in general as less dangerous than did subjects without previous contact. Subjects who received information summarizing the prevalence rates of violent behavior among individuals with schizophrenia and other psychiatric disorders (e.g., substance abuse) rated individuals with a mental illness as less dangerous than did subjects who did not receive this information. Implications of the findings for public education are discussed.

Adult↗
PubMed1999

Public conceptions of mental illness: labels, causes, dangerousness, and social distance.

OBJECTIVES: The authors used nationwide survey data to characterize current public conceptions related to recognition of mental illness and perceived causes, dangerousness, and desired social distance. METHODS: Data were derived from a vignette experiment included in the 1996 General Social Survey. Respondents (n = 1444) were randomly assigned to 1 of 5 vignette conditions. Four vignettes described psychiatric disorders meeting diagnostic criteria, and the fifth depicted a "troubled person" with subclinical problems and worries. RESULTS: Results indicate that the majority of the public identifies schizophrenia (88%) and major depression (69%) as mental illnesses and that most report multicausal explanations combining stressful circumstances with biologic and genetic factors. Results also show, however, that smaller proportions associate alcohol (49%) or drug (44%) abuse with mental illness and that symptoms of mental illness remain strongly connected with public fears about potential violence and with a desire for limited social interaction. CONCLUSIONS: While there is reason for optimism in the public's recognition of mental illness and causal attributions, a strong stereotype of dangerousness and desire for social distance persist. These latter conceptions are likely to negatively affect people with mental illness.

Analysis of Variance↗
PubMed1999

Who are "the homeless"? Reconsidering the stability and composition of the homeless population.

OBJECTIVES: This study assessed the extent to which the use of point-prevalence samples biases conclusions drawn about homeless people. METHODS: Three data sets and published research were used to examine the degree to which conditions leading to point-prevalence bias (turnover in the homeless population, variability in the persistence of homelessness, and associations between personal characteristics and persistence) characterize the homeless population. Results were compared from point-prevalence studies concerning persistence of homelessness and characteristics of homeless people with those from a study of formerly homeless people. RESULTS: Conditions leading to point-prevalence bias strongly characterize the homeless population. Moreover, profiles of homeless people differed dramatically between point-prevalence studies and the study of formerly homeless people. In the former, average duration of homelessness was longer, and samples included higher proportions of men, minorities, non-high school graduates, and people with histories of psychiatric hospitalization, incarceration, and detoxification. CONCLUSIONS: Reliance on point-prevalence samples, when such samples are generalized beyond the currently homeless population, leads to overestimations of the persistence of homelessness, the demographic distinctiveness of the homeless population, and the prevalence of personal disabilities and deviant lifestyles among homeless people.

Age Distribution↗
PubMed1999

The public's view of the competence, dangerousness, and need for legal coercion of persons with mental health problems.

OBJECTIVES: The authors examined Americans' opinions about financial and treatment competence of people with mental health problems, potential for harm to self or others, and the use of legal means to force treatment. METHODS: The 1996 General Social Survey provided interview data with a nationally representative sample (n = 1444). Respondents were given a vignette based on diagnostic criteria for schizophrenia, major depression, alcohol dependence, or drug dependence, or a "control" case. RESULTS: The specific nature of the problem was the most important factor shaping public reaction. Respondents viewed those with "troubles," alcohol dependence, or depression as able to make treatment decisions. Most reported that persons with alcohol or drug problems or schizophrenia cannot manage money and are likely to be violent toward others. Respondents indicated a willingness to coerce individuals into treatment. Respondent and other case characteristics rarely affected opinions. CONCLUSIONS: Americans report greater concern with individuals who have drug or alcohol problems than with persons who have other mental health problems. Evaluations of dangerousness and coercion indicate a continuing need for public education.

Attitude to Health↗
PubMed1999

Avoiding drunk drivers: the level and sources of protective behavior.

Drunk driving has been a concern for a decade and a half, with most discussions of its control centering on offenders. Research on the extent to which citizens engage in behaviors to avoid becoming victims of drunk drivers, however, is in short supply. This project examines the level of participation in protective behaviors, and it assesses the potential sources of self- and other-protection. Our findings indicate that substantial proportions of citizens take action to protect themselves and others from victimization by drunk drivers. We also find limited support for the fear/victimization model and no support for a collective security explanation of protective behavior.

Accidents, Traffic↗
PubMed1998

The growing belief that people with mental illnesses are violent: the role of the dangerousness criterion for civil commitment.

In response to a controversy concerning whether the stigma of mental illness has declined significantly in the United States in the past several decades, we assessed changes in public perceptions that mentally ill people are violent. Specifically, we compared answers to an open-ended question regarding respondents' understanding of the term "mental illness" from two nationally representative surveys, one conducted in 1950 and one in 1996. In an earlier paper, we reported the finding that perceptions of violence not only failed to decrease but actually increased significantly between 1950 and 1996. In this paper, we explore the possibility that the dangerousness criterion for involuntary commitment, widely adopted in the United States beginning in the 1960s, has contributed to the unexpected increase in perceptions that mentally ill people are dangerous. We find that, among respondents who mention violence in their description of a mentally ill person, the percentage who use "dangerous to self or others" phrasing to indicate this belief increased substantially, from 4.2% in 1950 to 44.0% in 1996. Moreover, eliminating these respondents from consideration, there was a slight decrease in perceptions of violence between 1950 and 1996. We discuss the possibility that the adoption of the dangerousness criterion, which was intended to protect the civil liberties of mentally ill persons, may also have had the unintended consequence of increasing the stigma of mental illness in the United States.

Adolescent↗
PubMed1998

Psychotic symptoms and violent behaviors: probing the components of "threat/control-override" symptoms.

Evidence for an association between mental illness and violence has grown in recent years, leading many to ask why such an association exists. One hypothesis links elevated rates of violence among people with mental illness to a small set of psychotic symptoms--so called threat/control-override (TCO) symptoms. Several studies have supported this hypothesis, but none has examined which of the components, threat or control-override--if either--predominates in explaining violence. To explore this issue we used data from a two-stage epidemiological study (n = 2741) conducted in Israel. Data on TCO symptoms were collected using two methods--fixed-format self-report questions from the first stage and psychiatrists' ratings based on interviews using the Schedule for Affective Disorders and Schizophrenia (SADS) from the second. Results show that both a measure of threat and a measure of control-override are independently associated with violent behaviors. Results also show that neither method--neither fixed-format questions nor psychiatrist rating--predominates in explaining violence. In sum, these results indicate that both the threat and the control-override components of the TCO concept are useful in predicting violent behaviors and that a better measurement of the TCO concept is achieved using a multimethod approach.

Adult↗
PubMed1998

Gender differences in the relationship between mental illness and violence: evidence from a community-based epidemiological study in Israel.

Although males are generally more likely than females to report violent behaviors, emerging evidence suggests that the gender gap is substantially reduced among individuals with mental illness. This paper investigates whether the associations between gender and self-reported violent behaviors (fighting and weapon use) are moderated by three mental health indicators--treatment status, psychiatric diagnosis, and threat/control-override psychotic symptoms. Data from a two-stage epidemiological study conducted in Israel (weighted N = 2706) are analyzed using descriptive statistics and logistic regression analysis. Results indicate that treatment status and psychiatric diagnosis moderate the association between gender and fighting, but leave open questions both about the moderating role of threat/control-override symptoms and about the implications of mental illness for the gender/weapon use relationship.

Adult↗
PubMed1998

Psychiatric illness and family stigma.

Considerable research has documented the stigmatization of people with mental illnesses and its negative consequences. Recently it has been shown that stigma may also seriously affect families of psychiatric patients, but little empirical research has addressed this problem. We examine perceptions of and reactions to stigma among 156 parents and spouses of a population-based sample of first-admission psychiatric patients. While most family members did not perceive themselves as being avoided by others because of their relative's hospitalization, half reported concealing the hospitalization at least to some degree. Both the characteristics of the mental illness (the stigmatizing mark) and the social characteristics of the family were significantly related to levels of family stigma. Family members were more likely to conceal the mental illness if they did not live with their ill relative, if the relative was female, and if the relative had less severe positive symptoms. Family members with more education and whose relative had experienced an episode of illness within the past 6 months reported greater avoidance by others.

Adolescent↗