Predictive genetic testing: psychological factors

Is There a Relationship Between Online Health Information Seeking and Health Anxiety? A Systematic Review and Meta-Analysis

The internet has revolutionized how we live, providing unprecedented convenience and up-to-date information. Consequently, an increasing number of individuals are turning to the internet for health-related information, despite research suggesting a correlation between this behavior and health anxiety. Therefore, drawing on cognitive - behavioral theory, we explore the link between online health information seeking and health anxiety via a systematic review and meta-analysis of cross-sectional studies. Following the Preferred Reporting Items for Systematic Reviews and Meta-analysis, we ran searches in multiple databases, including PubMed, Web of Science, Embase, Elsevier/Science Direct, Cochrane Database, China National Knowledge Infrastructure, VIP Chinese Database, and Wanfang Data. Our searches identified 16 studies eligible for review, involving 4,920 participants across seven countries. The random-effects meta-analysis revealed a significant positive correlation between online health information seeking and health anxiety (r = 0.28, 95% confidence interval [0.16, 0.41], p < .0001), despite considerable heterogeneity. Furthermore, meta-regression analysis demonstrated that the identity characteristics of the sample, female percentage, sample size, and country all contributed to the heterogeneity across studies. Overall, this meta-analysis provides support for the association between online health information seeking and health anxiety, and helps to elucidate the cognitive - behavioral theory underpinning this phenomenon.

Self-concept and health anxiety relate to psychological outcomes for BRCA1/2 carriers

OBJECTIVE

Leventhal's common sense model of self-regulation highlights how specific beliefs about illness influence psychological outcomes. Little is known on how such beliefs relate to BRCA1/2 adjustment. Furthermore, beliefs about one's self-concept may be relevant to genetic conditions and may relate to psychological wellbeing.

METHODS

One-hundred and eighteen female BRCA1/2 carriers from an Irish University Hospital completed questionnaires for this cross-sectional study. Outcomes measured were state anxiety and physical and mental health-related quality of life (HRQOL). Explanatory variables included sociodemographics, health anxiety, illness perceptions, coping and self-concept. Hierarchical multiple regression analyses were conducted.

RESULTS

Then, 44% of participants had clinically significant state anxiety and 12% had clinically significant health anxiety. Vulnerability, stigma, mastery and health anxiety explained 42% of the variance in state anxiety. Previous mental health difficulty, vulnerability, stigma, mastery and health anxiety explained 40% of the variance in mental HRQOL. Dysfunctional coping strategies were strongly related to the physical functioning aspect of quality of life.

CONCLUSION

BRCA-specific beliefs related to self and health anxiety are important factors to consider in the adjustment to BRCA1/2 confirmation.

Should we intervene at stage 0? A qualitative study of attitudes of asymptomatic youth at increased risk of developing bipolar disorders and parents with established disease

BACKGROUND

Studies of potential interventions for asymptomatic individuals at risk of severe mental disorders (ie, clinical stage 0) have focused on genetic counselling or the views of adults with established disease. No study has interviewed youth at risk of bipolar disorders (BD).

METHODS

Qualitative analysis of interviews with asymptomatic adolescent offspring of adults with BD (OSBD = 7) and unrelated parents with bipolar disorders (PBD = 6) to examine manifest and latent themes in the dialogue.

RESULTS

Core themes in both groups were ignorance regarding the magnitude of risk of BD onset in offspring and greater concerns for the health of other family members than for oneself. Parents expressed anxieties in coping with the uncertainty about whether their children would inherit BD and their desire to reduce this risk was partly driven by guilt and their sense of responsibility; PBD favoured the introduction of specialized clinical OSBD services. In contrast, the priority for OSBD was advice on coping with a parent with BD; OSBD favoured access to generic non-clinical peer group support, which they perceived as less stigmatizing than specialist services.

CONCLUSION

The study highlights that youth at risk of BD should be allowed to express their ideas on what interventions they believe are likely to be most beneficial for them, as their views may differ from other advocates who are routinely consulted, such as PBD. A noteworthy finding was that OSBD thought that being included in the clinical dialogue about their parents' BD would decrease rather than increase their stress levels.

Lay Attitudes toward Genetic Testing for Susceptibility to Inherited Diseases

One of the most important issues facing legal and medical policy makers in the coming years will be whether to employ populationbased testing for genetic markers of inherited diseases. Two hundred and twenty-six randomly selected individuals from Easton, Pennsylvania completed a mail questionnaire that was designed to assess the general public’s attitudes toward many of the personal and societal issues surrounding genetic testing for disease susceptibility. Respondents were generally optimistic about the potential benefits of genetic testing, and their attitudes about genetic testing were associated with their personal interest in getting a genetic test. Respondents were more likely to be interested in undergoing genetic testing for disease susceptibility if they might have some control over the targeted disease (i.e. there was a cure) and if the test was highly predictive of their chances of developing the disease. Respondents were wary of granting access to genetic testing results to anyone other than doctors and family members, and they did not want the government, religious leaders, or the courts involved in regulating genetic testing. These results have important implications for psychologists, genetic scientists, bioethicists, and legal scholars who are grappling with the many issues related to population-based genetic testing for inherited diseases.

Does Thinking about Personal Health Risk Increase Anxiety?

This study aimed to examine the effect on anxiety about health of a self-referent health questionnaire, in which people were asked to respond to questions about personal risk factors. Participants were randomly allocated into one of two experimental conditions (completing a self-referential assessment of their current health, or personality), with dependent variables measured before and after the experimental manipulation. Dependent variables included general and disease-specific (CHD, Stroke and Diabetes) anxiety and need for reassurance. Analysis of covariance suggested that participants who completed the health-focused questionnaire significantly increased in their anxiety ratings about Heart Disease, Stroke and Diabetes relative to those who completed the personality-focused assessment. There was no effect on general anxiety ratings. The results have important implications for measurement procedures commonly employed in health psychology, as they suggest that asking participants to rate factors related to health risk may lead to other psychological changes. It is important that subsequent research identify the duration of such effects.

Psychological and behavioral effects of genetic risk testing for obesity: a systematic review

BACKGROUND

Interest is growing in the use of genetic risk testing for lifestyle-related chronic diseases, including obesity, to promote health behavior change.

OBJECTIVE

A systematic review of the literature was conducted to determine the effects that genetic risk feedback for obesity may have on psychological and behavioral factors influencing weight.

METHODS

The MEDLINE/PubMed online database was searched using predefined search terms.

RESULTS

The studies revealed that risk feedback may increase motivation to improve health behaviors, especially among individuals at higher genetic risk. Overweight and obese individuals seemed to experience additional psychological benefits when provided an external explanation for their weight status.

CONCLUSION

While the psychological benefits are promising, the clinical utility of genetic risk testing for obesity remains uncertain.

Incorporating a Psychological Counselor in a Cancer Risk Assessment Program: Necessity, Acceptability, and Potential Roles

Evidence suggests that cancer risk assessment may be associated with increased psychological distress. This exploratory study assessed the necessity and acceptability of incorporating psychological counseling into routine clinic procedures at a cancer risk program. Following a visit to a university-based cancer risk clinic, patients (N = 102) completed an anonymous self-report instrument. Participants reported experiencing current stress and anxiety (41%), depression (29%), and suicidal ideation (2%). Patients with a history of cancer were more likely to be experiencing current emotional difficulties. Sixty-nine percent of the participants found the visit with the psychological counselor to be helpful, while 41% of the participants reported interest in follow-up psychological services. Interest in receiving future psychological services was positively correlated with levels of anxiety, depression, and cancer worry. This pilot study demonstrates the acceptability and potential role for psychological counselors in increasing adjustment in high-risk patients undergoing genetic counseling for inherited cancers.

The psychological impact of predictive genetic testing for Huntington's disease: a systematic review of the literature

Huntington's disease (HD) is a neurodegenerative genetic condition for which a predictive genetic test by mutation analysis has been available since 1993. However, whilst revealing the future presence of the disease, testing may have an adverse psychological impact given that the disease is progressive, incurable and ultimately fatal. This review seeks to systematically explore the psychological impact of genetic testing for individuals undergoing pre-symptomatic mutation analysis. Three databases (Medline, PsycInfo and Scopus) were interrogated for studies utilising standardised measures to assess psychological impact following predictive genetic testing for HD. From 100 papers initially identified, eight articles were eligible for inclusion. Psychological impact of predictive genetic testing was not found to be associated with test result. No detrimental effect of predictive genetic testing on non-carriers was found, although the process was not found to be psychologically neutral. Fluctuation in levels of distress was found over time for carriers and non-carriers alike. Methodological weaknesses of published literature were identified, notably the needs of individuals not requesting genetic testing, as well as inadequate support for individuals registering elevated distress and declining post-test follow-up. Further assessment of these vulnerable individuals is warranted to establish the extent and type of future psychological support.

An experimental investigation of factors involved in the decision to undertake genetic testing for schizophrenia

BACKGROUND

The psychological issues surrounding genetic testing, particularly decision-making processes, are not well understood. Previous studies suggest that apparently "nondirective" strategies intended to help individuals consider the consequences of undergoing predictive testing for physical illness can influence the decision.

AIMS

To investigate the influence of selectively focussing on different aspects of previously provided information concerning genetic testing for schizophrenia.

METHOD

Community participants (n = 120) rated how likely they would be to arrange to have a genetic test for schizophrenia if it were available, before and after being given detailed information about schizophrenia and the implications of testing. Participants were then randomly allocated to four groups, and were implicitly focused on the negative issues (negative group), the positive issues (positive group), both the negative and positive issues (all-focusing group) or schizophrenia-irrelevant health-related issues (control group). All issues on which the experimental groups focussed were included in the information provided and the form of questioning meets current definitions of nondirectiveness.

RESULTS

Hypothetical decisions whether to arrange a genetic test for schizophrenia were influenced by the issues on which participants had focused; the positive group were more likely to say they would be tested relative to the other groups.

CONCLUSIONS

Decisions about genetic testing for schizophrenia were influenced by the specific issues on which individuals were encouraged to focus at that time.

[Psychological distress in applicants for genetic screening for colorectal cancer]

Introduction. The development of a DNA based diagnostic test has allowed for the genetic screening of many hereditary diseases. In addition to the identification of the deleterious gene, this screening process has led to the recognition of developing illnesses at high risk. In recent years, a number of genes predisposing to an inherited cancer syndrome have been identified.

AIM OF THE STUDY

Our purpose in this study was to determine whether subjects at risk who test for inherited colorectal cancer, are likely to develop a higher level of psychological distress than the norm, taking into consideration the particular history of this familial disease.

METHODS

The demographic and psychosocial aspects of our population was described using: 1) the State Trait Anxiety Inventory (STAI), 2) the Center for Epidemiologic Studies Depression (CES-D), 3) a perceived risk for the gene carrier, 4) subjective perception of personal vulnerability and 5) the role of the medical status (affected or not), which places the subject in either predisposition or predictive testing.

RESULTS

Results show that our population had a higher predisposition for depressive disorders (chi2=9,3. p=0.002) and a significantly higher state of anxiety (chi2=9,3. p=0.002), prior to genetic counselling, compared with other populations. We found no evidence in the medical status, nor the perceived risk. However, the assessment of one's own personal vulnerability is related to psychological distress.

DISCUSSION

These results highlight the particular vulnerability of subjects undergoing genetic testing as well as showing the pertinence of proposing psychological help throughout the process of these new specific diagnoses.

Applying a cognitive behavioral model of health anxiety in a cancer genetics service

A cognitive-behavioral model of health anxiety was used to investigate reactions to genetic counseling for cancer. Participants (N = 218) were asked to complete a questionnaire beforehand and 6 months later. There was an overall decrease in levels of cancer-related anxiety, although 24% of participants showed increased cancer-related anxiety at follow-up. People who had a general tendency to worry about their health reported more cancer-related anxiety than those who did not at both time points. This health-anxious group also showed a postcounseling anxiety reduction, whereas the others showed no significant change. Participants with breast or ovarian cancer in their family were more anxious than participants with colon cancer in their family. Preexisting beliefs were significant predictors of anxiety, consistent with a cognitive-behavioral approach.

Measuring anxiety: are we getting what we need?

This article discusses several studies describing either the reevaluation and validation of existing scales for measuring anxiety (i.e., the Spielberger Trait Anxiety Inventory, the Liebowitz Social Anxiety Scale for adults and for children and adolescents, the Clinical Global Impression Scale, the Self-Rating Inventory for Posttraumatic Stress Disorder, and the Yale-Brown Obsessive Compulsive Scale Symptom Checklist), or the development and validation of new scales (i.e., the Social Thoughts and Beliefs Scale, the Social Phobia Diagnostic Questionnaire, the Aberdeen Trauma Screening Index and the Health Anxiety Inventory). As an increasing number of rating scales have been developed over the past several years, a critical review of their usefulness and psychometric properties seems pertinent and prudent.

To Test or Not To Test? Moderators of the Relationship Between Risk Perceptions and Interest in Predictive Genetic Testing

The moderating effects of motivational factors (illness prevention vs. emotional reassurance), regulatory focus (health vs. illness orientations), and cancer anxiety on the relationship between risk perceptions and women's interest in predictive genetic testing for breast cancer were studied among 102 women with no history of breast cancer. Risk perceptions per se were unrelated to testing interests. Perceptions of higher personal risk for developing breast cancer were positively related to women's interest in testing only among women whose dominant motivation was not emotional reassurance, who were not oriented towards ruling-out disease, and who were not highly anxious about breast cancer. These findings pointed to conditions under which risk perceptions may enhance screening behaviors, and other conditions under which they may not.

Measurement of psychological factors associated with genetic testing for hereditary breast, ovarian and colon cancers

Despite numerous individual studies of psychological factors (depression, anxiety, distress) related to genetic testing for inherited cancer syndromes (CGT), there has been no systematic review of the psychological factors are measured among individuals at increased risk for hereditary breast, ovarian, or colon cancer. Our review provides an analysis of psychological factors in studies of CGT and discusses the instruments most commonly used to measure them. We performed a literature search using three major OVID databases from 1993 to January 2003. In the 19 studies that met our inclusion criteria, the most commonly assessed psychological factors were distress, anxiety, and depression. These factors were most often measured by the impact of event scale (IES), the state-trait anxiety inventory (STAI), and the Centers for Epidemiologic Studies and Depression scale (CES-D), respectively. Our results show deficits in the existing body of literature on psychological factors associated with CGT including limited documentation of psychometrics and variability in instrumentation.

Research issues in genetic testing of adolescents for obesity

Obesity is often established in adolescence, and advances are being made in identifying its genetic underpinnings. We examine issues related to the eventual likelihood of genetic tests for obesity targeted to adolescents: family involvement; comprehension of the test's meaning; how knowledge of genetic status may affect psychological adaptation; minors' ability to control events; parental/child autonomy; ability to make informed medical decisions; self-esteem; unclear distinctions between early/late onset for this condition; and social stigmatization. The public health arena will be important in educating families about possible future genetic tests for obesity.

Technological and Medical Advances: Implications for Health Psychology

Behavioral telehealth, health informatics, organ and tissue transplantation, and genetics are among the areas that have been affected by advances in technology and medicine. These areas illustrate the opportunities and the challenges that new developments can pose to health psychologists. Each area is discussed with respect to implications for practice, research, public policy, and education and training: recommendations are provided.

Factors influencing intentions to seek a cognitive status examination: a study based on the Health Belief Model

AIMS

The aim of the present study was to examine the factors influencing intention to seek a cognitive status evaluation in the presence of memory problems.

METHODS

A convenience sample of 186 community-dwelling adults (mean age=64) were interviewed face-to-face using measures derived from the Health Belief Model.

RESULTS

Participants' intentions to be examined were higher when presented with scenarios describing family history of Alzheimer's disease (AD). Perceived barriers and cues to action were significant predictors of intention, accounting for 24% of the variance.

CONCLUSIONS

These findings suggest the need to develop effective educational strategies to improve knowledge about AD and decision-making concerning cognitive status examinations.

Cognitive-behavioural therapy with a Huntington's gene positive patient

The treatment of choice for depression or anxiety after genetic testing is the use of medication. The present paper reports a case of a lady who had a positive test result for Huntington's disease (HD). After the predictive test her mood declined and she experienced symptoms of anxiety. Cognitive-behavioural therapy (CBT) enabled her to deal effectively with her negative automatic thoughts (NATs) and interpret situations more realistically. Therapy was successful in reducing her level of physical, behavioural and affective symptoms and in increasing her sense of control. These gains were maintained at 3 and 6 months in spite of the death of her mother. The paper discussed the potential value of cognitive-behavioural theory and therapy in similar cases.

Prediction of psychological reactions to bone density screening for osteoporosis using a cognitive-behavioral model of health anxiety

Pre-screening measures derived from a cognitive-behavioral theory of health anxiety were significant predictors of individual differences in post-screening reactions to a health screening procedure, bone densitometry. Predictors included specific illness beliefs (vulnerability, severity/consequences, coping and treatment) and general health anxiety measures. Three months after a low bone mineral density (BMD) result, women with high levels of pre-existing general health anxiety gave higher ratings of anxiety about osteoporosis and perceived likelihood of developing osteoporosis than women with low levels of preexisting health anxiety, even though the two groups' initial ratings had not differed significantly. Women with a low BMD result generally showed "minimization" of the seriousness of low BMD but women with very high levels of pre-existing health anxiety did not. After a high BMD result, highly health anxious women were only temporarily reassured. The results were consistent with the cognitive-behavioral analysis of health anxiety.

The effects of 'non-directive' questioning on an anticipated decision whether to undergo predictive testing for heart disease: an experimental study

This study investigates how individuals can be helped to make decisions about predictive genetic testing. Participants (n = 120) rated how likely they would be to opt for predictive testing for heart disease if it were available, and other variables such as anxiety about heart disease. They received information on predictive testing for heart disease and ratings were repeated. Participants were then randomly allocated to one of three groups and focused on the personal relevance of positive issues or negative issues which had been mentioned as part of the standardised information previously given. The third group focused on issues irrelevant to testing for heart disease. The form of questioning used in this focusing manipulation was intended to model the processes involved in non-directive questioning. Results showed a significant increase in likelihood of testing in the positive group, and a significant decrease in the negative group. There was also a significant decrease in rated anxiety about heart disease and perceived severity of an increased susceptibility to heart disease of the negative group relative to the positive and control groups. The results may have implications for the ways in which pre-test counselling is carried out.

An experimental study of influences on the perceived likelihood of seeking genetic testing: "nondirectiveness" may be misleading

It has been suggested that decision making involves the implicit weighing up of those advantages and disadvantages of possible options considered relevant at the time the decision is made. If this is so, the information that people have most readily available at the time of the decision would influence the decision outcome. The study reported here experimentally evaluates the effect of manipulating the issues on which individuals focus as a way of investigating subtle directive influences. Participants (n = 104) were interviewed about their anticipated likelihood of opting for testing for hereditary hemochromatosis. All participants were given standard information about hemochromatosis, including a description of the disorder as causing progressive damage over many years and an explanation that treatment is most effective if begun before the age of 30 years. Individuals were randomly allocated to groups according to age group (30 years and under, or over 30 years) and gender. Those allocated to the positive group were then encouraged to focus on positive aspects of the previously given information by considering the extent to which statements applied to them, whereas the negative group focused on negative aspects. The control group focused on an unrelated disease. Analyses of variance indicated that the focusing manipulation affected the likelihood of opting for testing. This effect interacted with age of respondent: in participants over 30, the positive group ratings of likelihood of testing increased, whereas in the negative group they decreased; in participants 30 and under, both the positive and negative groups showed an increased desire to be tested. The control group did not alter significantly. The relevance of these findings to "nondirective" approaches to genetic counseling is considered.

The individual, the family, and genetic testing

Genetics plays a role in every disease, yet few health care providers understand basic genetic principles or the science underlying the genetic testing process. An understanding of the science behind genetic advances is necessary, and it is equally important for health professionals to have an understanding of the complex nature of genetic testing for individuals and their families. Much of the debate about the psychological effects of genetic testing has occurred in the absence of empirical data on diseases for which predictive testing has only recently emerged. This article will review selected literature on genetic testing and its implications for the individual and the family. The responses of families and individuals to the diagnosis of a genetic disease will be reviewed, and Huntington disease will be used as the paradigm for examining issues related to genetic testing for adult-onset cancers. Literature addressing the response to genetic susceptibility for adult-onset cancers and the implications of testing children also will be explored. Finally, identification of emerging issues relevant to genetic screening will provide a framework for identifying needed nursing research in genetic testing for adult-onset cancer risk.

The prospect of predictive testing for personal risk: attitudes and decision making

As predictive tests for medical problems such as genetic disorders become more widely available, it becomes increasingly important to understand the processes involved in the decision whether or not to seek testing. This study investigates the decision to pursue the possibility of testing. Individuals (one group who had already contemplated the possibility of predictive testing and one group who had not) were asked to consider predictive testing for several diseases. They rated the likelihood of opting for testing and specified the reasons which they believed had affected their decision. The ratio of the numbers of reasons stated for testing and the numbers of reasons stated against testing was a good predictor of the stated likelihood of testing, particularly when the reasons were weighted by utility (importance). Those who had previously contemplated testing specified more emotional reasons. It is proposed that the decision process is internally logical although it may seem illogical to others due to there being idiosyncratic premises (or reasons) upon which the decision is based. It is concluded that the Utility Theory is a useful basis for describing how people make decisions related to predictive testing; modifications of the theory are proposed.