Keith J. Petrie

Bio: Keith J. Petrie is an academic researcher from University of Auckland. The author has contributed to research in topics: Randomized controlled trial & Population. The author has an hindex of 66, co-authored 264 publications receiving 21044 citations. Previous affiliations of Keith J. Petrie include Health Science University & Waikato Hospital.

The Revised Illness Perception Questionnaire (IPQ-R)

Abstract: This paper presents a revised version of the Illness Perception Questionnaire (IPQ-R), a recently developed and widely used quantitative measure of the five components of illness representations in Leventhal's self-regulatory model. The revised version stemmed from a need to deal with minor psychometric problems with two subscales, and to include additional subscales, assessing cyclical timeline perceptions, illness coherence, and emotional representations. Item selection was determined by principal components analyses which verified the factorial structure of the questionnaire in a sample of 711 patients from 8 different illness groups. Further analysis provided good evidence for both the internal reliability of the subscales and the short (3 week) and longer term (6 month) retest reliability. The IPQ-R also demonstrated sound discriminant, known group and predictive validity. While it is possible that the new subscales will vary in their applicability in different patient groups, the IPQ-R provides a more comprehensive and psychometrically acceptable assessment of the key components of patients' perceptions of illness.

The illness perception questionnaire: A new method for assessing the cognitive representation of illness

Abstract: The Illness Perception Questionnaire (IPQ) is a new method for assessing cognitive representations of illness. The IPQ is a theoretically derived measure comprising five scales that provides information about the five components that have been found to underlie the cognitive representation of illness. The five scales assess identity - the symptoms the patient associates with the illness, cause - personal ideas about aetiology, time-line - the perceived duration of the illness, consequences - expected effects and outcome and cure control - how one controls or recovers from the illness. The IPQ has a specific number of core items but allows the user to add items for particular patient groups or health threats. Data is presented supporting the reliability and validity of the IPQ scales in different chronic illness populations.

Changing illness perceptions after myocardial infarction: an early intervention randomized controlled trial.

Abstract: OBJECTIVE This study was designed to examine whether a brief hospital intervention designed to alter patients' perceptions about their myocardial infarction (MI) would result in a better recovery and reduced disability. DESIGN In a prospective randomized study, 65 consecutive patients with their first MI aged were assigned to receive an intervention designed to alter their perceptions about their MI or usual care from rehabilitation nurses. Patients were assessed in hospital before and after the intervention and at 3 months after discharge from hospital. RESULTS The intervention caused significant positive changes in patients' views of their MI. Patients in the intervention group also reported they were better prepared for leaving hospital (p<.05) and subsequently returned to work at a significantly faster rate than the control group (p<.05). At the 3-month follow-up, patients in the intervention group reported a significantly lower rate of angina symptoms than control subjects (14.3 vs. 39.3, p<.03). There was no significant differences in rehabilitation attendance between the two groups. CONCLUSIONS An in-hospital intervention designed to change patients' illness perceptions can result in improved functional outcome after MI.

Role of patients' view of their illness in predicting return to work and functioning after myocardial infarction: longitudinal study

Abstract: Objective: To examine whether patients9 initial perceptions of their myocardial infarction predict subsequent attendance at a cardiac rehabilitation course, return to work, disability, and sexual dysfunction. Design: Patients9 perceptions of their illness were measured at admission with their first myocardial infarction and at follow up three and six months later. Setting: Two large teaching hospitals in Auckland, New Zealand. Subjects: 143 consecutive patients aged under 65 with their first myocardial infarction. Main outcome measures: Attendance at rehabilitation course; time before returning to work; measures of disability with sickness impact profile questionnaire for sleep and rest, social interaction, recreational activity, and home management; and sexual dysfunction. Results: Attendance at the rehabilitation course was significantly related to a stronger belief during admission that the illness could be cured or controlled (t=2.08, P=0.04). Return to work within six weeks was significantly predicted by the perception that the illness would last a short time (t=-2.52, P=0.01) and have less grave consequences for the patient (t=-2.87, P=0.005). Patients9 belief that their heart disease would have serious consequences was significantly related to later disability in work around the house, recreational activities, and social interaction. A strong illness identity was significantly related to greater sexual dysfunction at both three and six months. Conclusions: Patients9 initial perceptions of illness are important determinants of different aspects of recovery after myocardial infarction. Specific illness perceptions need to be identified at an early stage as a basis for optimising outcomes from rehabilitation programmes. Key messages Patients9 beliefs about their illness seem to influence recovery and rehabilitation on discharge from hospital Patients9 ideas about their illness cluster around five cognitive dimensions: identity, cause, time line, consequences, and beliefs about cure or control In this study a belief that the illness could be controlled or cured was related to subsequent attendance at a cardiac rehabilitation course. Perceptions that the illness would last a long time and have serious consequences were associated with a longer delay before returning to work The early identification of illness perceptions could improve the outcome of cardiac rehabilitation programmes

Prejudice, social stress, and mental health in lesbian, gay, and bisexual populations: conceptual issues and research evidence

Abstract: In this article the author reviews research evidence on the prevalence of mental disorders in lesbians, gay men, and bisexuals (LGBs) and shows, using meta-analyses, that LGBs have a higher prevalence of mental disorders than heterosexuals. The author offers a conceptual framework for understanding this excess in prevalence of disorder in terms of minority stress— explaining that stigma, prejudice, and discrimination create a hostile and stressful social environment that causes mental health problems. The model describes stress processes, including the experience of prejudice events, expectations of rejection, hiding and concealing, internalized homophobia, and ameliorative coping processes. This conceptual framework is the basis for the review of research evidence, suggestions for future research directions, and exploration of public policy implications. The study of mental health of lesbian, gay, and bisexual (LGB) populations has been complicated by the debate on the classification of homosexuality as a mental disorder during the 1960s and early 1970s. That debate posited a gay-affirmative perspective, which sought to declassify homosexuality, against a conservative perspective, which sought to retain the classification of homosexuality as a mental disorder (Bayer, 1981). Although the debate on classification ended in 1973 with the removal of homosexuality from the second edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM; American Psychiatric Association, 1973), its heritage has lasted. This heritage has tainted discussion on mental health of lesbians and gay men by associating— even equating— claims that LGB people have higher prevalences of mental disorders than heterosexual people with the historical antigay stance and the stigmatization of LGB persons (Bailey, 1999). However, a fresh look at the issues should make it clear that whether LGB populations have higher prevalences of mental disorders is unrelated to the classification of homosexuality as a mental disorder. A retrospective analysis would suggest that the attempt to find a scientific answer in that debate rested on flawed logic. The debated scientific question was, Is homosexuality a mental disorder? The operationalized research question that pervaded the debate was, Do homosexuals have high prevalences of mental disorders? But the research did not accurately operationalize the scientific question. The question of whether homosexuality should be considered a mental disorder is a question about classification. It can be answered by debating which behaviors, cognitions, or emotions should be considered indicators of a mental

The psychological meaning of words: LIWC and computerized text analysis methods

Abstract: We are in the midst of a technological revolution whereby, for the first time, researchers can link daily word use to a broad array of real-world behaviors. This article reviews several computerized text analysis methods and describes how Linguistic Inquiry and Word Count (LIWC) was created and validated. LIWC is a transparent text analysis program that counts words in psychologically meaningful categories. Empirical results using LIWC demonstrate its ability to detect meaning in a wide variety of experimental settings, including to show attentional focus, emotionality, social relationships, thinking styles, and individual differences.

Psychometric properties of the 42-item and 21-item versions of the Depression Anxiety Stress Scales in clinical groups and a community sample.

Abstract: The factor structure, reliability, and validity of the Depression Anxiety Stress Scales (DASS; S. H. Lovibond & P. F. Lovibond, 1995) and the 21-item short form of these measures (DASS-21) were examined in nonclinical volunteers (n = 49) and patients with Diagnostic and Statistical Manual of Mental Disorders (4th ed.; American Psychiatric Association, 1994) diagnoses of panic disorder (n = 67), obsessive-compulsive disorder (n = 54), social phobia (n = 74), specific phobia (n = 17), and major depressive disorder (n = 46). This study replicates previous findings indicating that the DASS distinguishes well between features of depression, physical arousal, and psychological tension and agitation and extends these observations to the DASS-21. In addition, the internal consistency and concurrent validity of the DASS and DASS-21 were in the acceptable to excellent ranges. Mean scores for the various groups were similar to those in previous research, and in the expected direction. The implications of these findings are discussed.

Hopelessness depression: A theory-based subtype of depression.

Abstract: Summary and Future Directions On the basis of the aforementioned studies, the hopelessnesstheory appears promising However, further research is neededFor example, although powerful tests of the attributional diath-esis-stress component have been conducted, no one has exam-ined the cognitive diatheses of inferring negative consequencesor characteristics about the self or whether the cognitive stylediathesis-stress interaction predicts clinically significant de-pression Moreover, it is crucial to determine if this interactionpredicts the development of the hypothesized symptoms ofhopelessness depression More generally, an important short-coming of the prior work is that it has not focused on the symp-toms of hopelessness depression in particular and, instead, sim-ply has examined the symptoms of depression in general Fu-ture investigators need to test more fine-grained predictionsabout the hypothesized symptoms of hopelessness depressionThe issue of the stability of the cognitive diatheses has not beenresolved satisfactorily We have only begun, in a preliminaryway, to investigate the issues of specific vulnerability and media-tional processes Finally, further tests of the predictions aboutcourse, cure, and prevention are needed We eagerly await thisresearchDifficult methodological issues may arise in the search forhopelessness depression, however For example, the hopeless-ness theory is silent about the time lag between formation ofhopelessness and onset of the symptoms of hopelessness depres-sion If it is very short, then a major challenge will be to developmethods with sufficient temporal resolving power to determineif hopelessness indeed precedes the occurrence of the hypothe-sized symptoms of hopelessness depression (see Alloy, Hartlage,et al, 1988, for proposed methods for testing the hopelessnesstheory) The results of work to test the hopelessness theory willdetermine if the concept of hopelessness depression needs tobe revised For example, perhaps the statement of the causalpathway is correc t bu culminate n a differen se f symp-toms than those currently hypothesized to compose hopeless-ness depression In this case, the symptom—but not thecause—component of the hopelessness theory would need to bemodifiedIn discussing how to search for hopelessness depression, wenote the possibility that future work may not corroborate theexistence of hopelessness depression as a bona fide subtype withcharacteristic cause, symptoms, course, treatment, and preven-tion Instead, the etiological chain featured in the hopelessnesstheory may be one of many pathways to a final common out-come of depression In this case, it would be more compellingto speak of a hopelessness cause, as opposed to a hopelessnesssubtype, of depression