Modeling Women's Need For Action in Violent Relationships

We are beginning to understand that intimate partner violence (IPV) and women's decision-making about that violence are nonlinear phenomena. IPV and decision-making are influenced by variables feedforwarding upon themselves with multiple interconnected predictors and circularly causal relationships. Computer models can help us gain a systems perspective on these relationships and enable hypothesis-testing without engendering risk to women in these relationships. The purpose of this study was to develop a mathematical model of women's decision-making concerning her violent relationship and assess the impact of random stress and her controllable behaviors on violence and decision-making. An agent-based model was created using data from couples with history of violence, based upon results of multiple time series of partner violence. To explore factors that may alter model results, eight continuous variable parameters were created based upon significant (p ≤ .05) but discrepant (opposite directions) results from two prior time series studies. Overall, 13 unique patterns of violence in five categories were identified, but none of these categories included his violence alone without some additional influence (i.e., marital distance leading to marital distance the following day). To assess the potential impact that random stress and behaviors under her control (arguments, forgiveness, alcohol use, violence) could have on need-for-action and actions taken, the effects of variable parameter settings on these outcomes were also assessed. While random stress had little effect on outcomes, her interventions could have an impact but were pattern-specific. Her daily participation in arguments correlated with more violence. The need-for and actually taking action were at times independent of each other. This mathematical model yielded results that generally involved her violence with or without his violence. Thus, modeling partner violence and women's decision-making is possible, yielding diverse patterns. However, the complexity of interdependent predictors unique to each relationship means that targeted interventions will need to be couple-specific.

He Said, She Said: Comparing Men's and Women's Descriptions of Men's Partner Violence

More than one in three women and one in four men in the United States report victimization by intimate partner violence. Women and men often disagree about the frequency or severity of violent acts, and researchers have proposed various reasons for discordant reports. Using daily surveys and qualitative interviews, we compared men's and women's reports about men's partner aggression and examined language they used to describe their experiences. Fifteen heterosexual couples in violent relationships completed an 8-week study that involved daily telephone surveys about violent behaviors and household environment; baseline and end-of-study surveys addressing predictors and outcomes of violence; and qualitative end-of-study interviews to provide perspective about their relationships. Most participants were Latinos with low income. Relationship length was 5.5 years, median. In daily surveys, both partners reported similar frequencies of men's physical violence (4% of days), but men reported more physical violence by women than women did (8% vs. 3% of days). The qualitative analysts compared men's and women's accounts of male-to-female violence and observed gender-specific variations in style of reporting. Men used indirect language to describe their violent behavior, implied definitions of abuse, and justified their aggression. These findings have implications for clinical guidelines to screen and intervene with victims and perpetrators of intimate partner violence in primary care and emergency settings. Future research should focus on perpetrators of violence and examine effective ways for health care providers to identify and manage their care.

Is Perceived Need for Action Among Women in Violent Relationships Nonlinear and, If So, Why?

Despite the prevalence and impact of partner violence, we understand little about women's action taking except that it seems an unpredictable, nonlinear process. This article determines the degree of nonlinearity in perceived need for help, legal action, or leaving among women in violent relationships. The participants included 143 women who experienced violence in the previous month, enrolled from six primary care clinics. Baseline surveys assessed background characteristics and factors which may affect perceived need for action. Multiple times series assessments of violence and need for action were collected daily for 8 weeks via telephone Interactive Voice Response. Measures of nonlinearity of violence, perceived need for help, legal action, and leaving were computed. Repeated measures ANOVA assessed differences across measures of nonlinearity. To identify factors contributing to nonlinearity, staged multiple regression assessed the relationship between nonlinearity measures and outcomes. Ninety-three women completed sufficient time series for nonlinearity assessment. Measures of nonlinearity were lower for need for legal action compared with needs for help and leaving. Regression analysis suggested that isolation, social networks, and lack of awareness contribute to nonlinearity. Women's perceived need for legal action and its level of nonlinearity were lowest compared with those of help seeking and leaving. Although its relative linearity suggests that the need for legal action may be the most predictable, its lower mean rating suggests that legal action is a low priority. Although need for help and leaving are of higher priorities, their nonlinearity suggests that intervention will not yield predictable results.

Is Readiness to Take Action Among Women in Violent Relationships a Catastrophic Phenomenon?

Taking action among women in violent relationships appears to involve sudden changes and reversals after periods of building stress, suggesting that decision making is a "catastrophic" phenomenon. This study sought to determine whether readiness-to-change is best modeled as a cusp catastrophic (CCM) phenomenon among women in violent relationships. A total of 143 women who experienced violence in the previous month completed baseline and end-of-study interviews assessing her hope, coping strategies, social network, and readiness-for-action (seeking help, taking legal action, and leaving) concerning the violence. Daily assessments of his violent behavior, forgiveness sought and given, and her perceived need-for-action were collected via telephone Interactive Voice Response for 8 weeks. Using regression analysis, the impact of factor-analyzed asymmetry (violence burden) and bifurcation (hope and cope, support, forgiveness, and number of children) variables on the outcomes (readiness-for-help, legal action, and leaving) was modeled, comparing the CCM against linear models to determine which model accounts for the most variance in each outcome. Cusp catastrophe models for all three actions accounted for more variance than either linear model comparison, but violence burden was only relevant to readiness-for-help and different bifurcation variables were at work for each action. While forgiveness was an important bifurcation factor in readiness-for-help and number of children served as the bifurcation factor for readiness-for-legal-action, readiness-to-leave was more complex with both number of children and hope-and-cope as bifurcation factors. Not only should we expect sudden changes in readiness but efforts to facilitate decision making should focus on addressing the bifurcation factors that may distort her interpretation of reality.

Predictors of Perceived Need for and Actual Action Taking Among Women in Violent Relationships

Decision-making of women in violent relationships is poorly understood. The study seeks to identify predictors of need-for-action and actions taken by women in violent relationships. The participants were 143 women who experienced violence in previous month from 6 primary care clinics. The methods involved multiple times series using daily assessments of household environment, marital relationship, concerns, violence, and need-for-action collected via telephone interactive voice response for 8 weeks. Outcomes include daily need-for-action and reports of actions taken. Same-day correlates and prior-day associations using vector autoregressions were sought, combined across subjects using meta-analytic techniques. Need for help depended on stalking, concern for child safety, forgiveness, and low perceived control; actually seeking help depended on sense of control with same-day stress and need for help. Need for legal action depended on concern for child safety and finances with desire to keep family together; actually taking legal action, correlated only with prior-day stalking and concerns about child safety but less about effects of violence on child. Need to leave depended on his violence, with concern about its effect on child, her forgiveness, and a low desire to keep family together, while actually leaving was primed by a day of his drinking, and triggered by same-day stress and need to leave, but lower levels of her drinking or his seeking forgiveness. Once gone, prior-day stalking and his alcohol use correlated with returning to the relationship. Taking action depends upon few prior- and same-day factors unique to each action.

The Dynamics of Partner Violence and Alcohol Use in Couples: Research Methods

OBJECTIVE

This research team uses complexity science to gain a deeper understanding of daily dynamics of intimate partner violence (IPV). This report describes research methods for gathering daily information about patterns of partner violence and alcohol use from couples in near-real time, and addresses recruitment and retention, adherence to study protocol, data validity, and participant safety.

METHODS

Researchers enrolled 20 heterosexual couples with violent relationships from a primary healthcare center. Every day for 8 weeks, participants telephoned an interactive voice response (IVR) system and responded to 33 survey questions assessing violence, alcohol use, and household environment. They also completed baseline and end-of-study surveys.

RESULTS

Of 20 enrolled couples, 15 completed the study, providing 90% adherence to daily reporting. Participants reported verbal aggression on an average of 11-13 days over 8 weeks, and physical abuse on an average of 2-4 days. Alcohol use was modest and infrequent. Women and men differed in their reports of women's physical aggression. No reports of physical violence were correlated with social desirability.

CONCLUSIONS

We demonstrated the feasibility of enrolling and engaging both women and men in daily longitudinal research about partner violence and described advantages of IVR in daily longitudinal research.

It is complicated! - misunderstanding the complexities of 'complex'

Terminology matters - as Lakoff emphasised, words and phrases evoke powerful images and frames of understanding. It is for that reason that we need to discern and use appropriately the term complex/complexity in the health science/professional/policy domain. Complex is the fashionable term used when in reality one means 'complicated', 'difficult to understand' or 'multiple simultaneous actions'. However, this is not what complex means. The Latin term means 'entwined/interwoven' - a structural characteristic describing systems. Complexity arises from the interactions between structurally connected entities - a functional characteristic of a system. The basis of scientific rigor is a clear understanding of a discipline's epistemology. Complexity refers to the emergence of outcomes from the interactions of a system's constituent components (and thus has nothing in common with the colloquial meaning of complicatedness).

Research or intervention or both? Women's changes after participation in a longitudinal study about intimate partner violence

INTRODUCTION

The tensions between risk and benefit in research are particularly evident in studies about intimate partner violence. Recalling and relating traumatic experiences may deepen posttraumatic stress or relieve the burden of terrible events long borne in secret. In this article, we examine the effects of study participation in a longitudinal investigation of intimate partner violence using both qualitative and quantitative data.

METHOD

Researchers enrolled 200 women in moderately violent intimate relationships and asked them to report about their relationships every day for 12 weeks. Daily, participants telephoned an automated survey and responded to 34 survey questions. They also completed baseline and end-of-study surveys and maintained telephone contact with 1 researcher weekly. Forty-2 participants completed qualitative end-of-study interviews to describe their relationships and their experiences in the study.

RESULTS

Over 12 weeks, participants showed improvements in coping strategies, hope, and mental health, and increased readiness to leave their partners. In qualitative interviews, women reported gaining insight, feeling better emotionally, making behavioral changes, finding comfort in daily surveys, learning resources for help, and taking action to improve their lives. Fourteen percent left their partners by end-of-study; 35% sought counseling.

DISCUSSION

The study's daily survey invited the participant to become more reflective about her relationship, which changed how she saw herself and her situation. The study methods also included weekly conversations with a compassionate researcher, allowing women to tell their stories. These 2 strategies may be incorporated into brief interventions for intimate partner violence in primary care settings. (PsycINFO Database Record

Modeling Outcomes of Partner Violence Using Cusp Catastrophe Modeling

Research suggests that intimate partner violence (IPV) is a complex, nonlinear phenomenon. In addition to the violence trajectory itself, IPV decision-making, help-seeking and leaving are nonlinear processes as well. The purpose of this study was to determine whether outcomes were best modeled as cusp catastrophic phenomena with measures of violence nonlinearity and wife-perpetrated violence serving as bifurcation variables. This 12-week time series study was conducted among 200 adult women in violent relationships. Women completed daily assessments of household environment and marital relationship using Interactive Verbal Response; missing violence data was imputed using TISEAN software to maintain its nonlinear characteristics. LZ complexity, approximate entropy, and largest Lyapunov exponents were used as measures of violence nonlinearity. Asymmetry variables included violence frequency and severity as well as its onset and duration. Factor-analyzed outcomes included coping and appraisals, hope and support, symptomatology, functional status, readiness-for-change, and medical utilization. When severity of wife's violence and nonlinearity of husband's violence were used as bifurcation variables, cusp catastrophe modeling helped explain positive and negative coping as well as readiness-for-change. In conclusion, measures of nonlinearity of husband's violence and wife's violence contributed to the variance of three outcomes in cusp catastrophe modeling. Sudden changes in coping and readiness-for-change in IPV should be expected and knowledge of violence nonlinearity may have applications when working with violent couples.

Systems and complexity thinking in the general practice literature: an integrative, historical narrative review

PURPOSE

Over the past 7 decades, theories in the systems and complexity sciences have had a major influence on academic thinking and research. We assessed the impact of complexity science on general practice/family medicine.

METHODS

We performed a historical integrative review using the following systematic search strategy: medical subject heading [humans] combined in turn with the terms complex adaptive systems, nonlinear dynamics, systems biology, and systems theory, limited to general practice/family medicine and published before December 2010. A total of 16,242 articles were retrieved, of which 49 were published in general practice/family medicine journals. Hand searches and snowballing retrieved another 35. After a full-text review, we included 56 articles dealing specifically with systems sciences and general/family practice.

RESULTS

General practice/family medicine engaged with the emerging systems and complexity theories in 4 stages. Before 1995, articles tended to explore common phenomenologic general practice/family medicine experiences. Between 1995 and 2000, articles described the complex adaptive nature of this discipline. Those published between 2000 and 2005 focused on describing the system dynamics of medical practice. After 2005, articles increasingly applied the breadth of complex science theories to health care, health care reform, and the future of medicine.

CONCLUSIONS

This historical review describes the development of general practice/family medicine in relation to complex adaptive systems theories, and shows how systems sciences more accurately reflect the discipline's philosophy and identity. Analysis suggests that general practice/family medicine first embraced systems theories through conscious reorganization of its boundaries and scope, before applying empirical tools. Future research should concentrate on applying nonlinear dynamics and empirical modeling to patient care, and to organizing and developing local practices, engaging in community development, and influencing health care reform.

Association of knowledge, attitudes, and behaviors for colon cancer screening in Hispanic patients

PURPOSE

The purpose of our cross-sectional study was to examine the association between sociodemographic, knowledge, attitude and behavior factors with colon cancer screening among low-income Hispanic patients from an urban family medicine clinic in San Antonio, Texas.

METHODS

Using random stratified sampling, 804 patients were surveyed with 274 Hispanic patients meet the eligibility criteria for colon cancer screening (aged > or = 50 years). A 10-page self-administered questionnaire in Spanish or English completed in the clinic waiting room included self-reported colonoscopy, sociodemographic characteristics, health status, knowledge, attitudes, and behaviors toward colon cancer screening. Associations between colonoscopy and patient characteristics were assessed using logistic regression.

RESULTS

62% of patients reported having been tested for colonoscopy. Older Hispanics (age mean=59 + 6.1 SD) were more likely to have a colonoscopy than younger Hispanics (age mean = 56 +/- 4.8 SD) (P < .001). Bivariate analysis showed that patients who discussed colon cancer risk with their doctor (P = .001), did not smoke (P = .004), or encouraged family members or friends to be tested for colon cancer (P < .001) were more likely to be screened. Multiple variable logistic regression analysis showed that older age, having cancer, discussing the risk factors with their doctor, and encouraging family members or friends to get tested were significant predictors for colonoscopy testing in Hispanics.

CONCLUSIONS

Colonoscopy screening in a sample of low-income Hispanic patients differed by age and health experience. Intervention programs that increase colon cancer screening in Hispanics patients should concentrate on those aged < 60. Patient education for knowledge, positive attitude, and behaviors may improve colon cancer screening.

Complex dynamics in intimate partner violence: a time series study of 16 women

OBJECTIVE

Three theories attempt to explain the dynamics of intimate partner violence, each representing a different dynamic pattern of violence: periodic, chaotic, and random. But few studies assess violence and its potential predictors in real time or permit assessment of the dynamics of violence. The purpose of this exploratory study was to estimate the degree of complexity in patterns of violence and identify predictors of violent events.

METHOD

This time series study was conducted between September 2006 and April 2007 among 16 adult women presenting to a university-affiliated family health center who had experienced violence within the past month. Women completed a daily telephone assessment of household environment and marital relationship for 2 months. To assess the degree of complexity, 3 different measures were used. Lyapunov exponents and saturation of correlation dimension were used to approximate dynamic patterns. Vector autoregression identified prior-week predictors of violence. Results were pooled across the 16 subjects who provided daily reports using meta-analytic techniques.

RESULTS

Most relationships exhibited complex dynamics, with all 3 distinct dynamic patterns found. The longer the relationship had lasted, the more predictable and periodic were its dynamics. The more frequent the violence, the more complex and sensitive to change were its dynamics. Comparing dynamic patterns, 3 distinct combinations of significant prior-day and prior-week associations were found.

CONCLUSIONS

Although complex dynamics were unrelated to duration of violence, there was a dynamic tension between (1) the duration of the relationship and its periodic temporal patterns and (2) the frequency of violence and its complex dynamics. Identification of dynamic patterns may aid understanding of the phenomena of intimate partner violence and lead to novel targeted screening, monitoring, and intervention/treatment approaches.

The association between panic disorder and coronary artery disease among primary care patients presenting with chest pain: an updated literature review

CONTEXT

Although panic disorder is linked to hypertension and smoking, the relationship between panic disorder and coronary artery disease (CAD) is unclear.

OBJECTIVE

To extend our understanding about the strength of the association between panic disorder and coronary artery disease and known cardiovascular risk factors.

DATA SOURCES

Potential studies were identified via a computerized search of MEDLINE and PsycINFO databases and review of bibliographies. MeSH headings used included panic disorder with chest pain, panic disorder with coronary disease or cardiovascular disorders or heart disorders, and panic disorder with cholesterol or essential hypertension or tobacco smoking.

STUDY SELECTION

The diagnosis of panic disorder in eligible studies was based on DSM-IV criteria, and studies must have used objective criteria for CAD and risk factors. Only case-control and cohort studies were included.

DATA SYNTHESIS

Concerning the relationship between panic disorder and CAD, studies conducted in emergency departments found a relative risk [RR] of 1.25 (95% CI = 0.87 to 1.80), while those conducted in cardiology settings found an inverse relationship (RR = 0.19, 95% CI = 0.10 to 0.37). However, there is an inverse relationship between the prevalence of CAD in the study and the RR (r = -.554, p = .097), suggesting that, in primary care settings in which the prevalence of CAD is low, there may be a significant association between panic disorder and CAD.

CONCLUSION

The association between panic disorder and CAD has several implications for primary care physicians managing patients with chest pain. When comorbid, the panic attacks may cause the patient with coronary disease to seek care but could also provoke a cardiac event. If one condition is recognized, a search for the other may be warranted because of the potential consequences if left undetected. The treatment approach to the panic disorder should be adjusted in the presence of comorbid CAD.

Chemical intolerance in primary care settings: prevalence, comorbidity, and outcomes

PURPOSE

This study extends previous community-based studies on the prevalence and clinical characteristics of chemical intolerance in a sample of primary care clinic patients. We evaluated comorbid medical and psychiatric disorders, functional status, and rates of health care use.

METHODS

A total of 400 patients were recruited from 2 family medicine clinic waiting rooms in San Antonio, Texas. Patients completed the validated Quick Environmental Exposure and Sensitivity Inventory (QEESI) to assess chemical intolerance; the Primary Care Evaluation of Mental Disorders (PRIME-MD) screen for possible psychiatric disorders; the Dartmouth-Northern New England Primary Care Cooperative Information Project (Dartmouth COOP) charts for functional status; and the Healthcare Utilization Questionnaire.

RESULTS

Overall, 20.3% of the sample met criteria for chemical intolerance. The chemically intolerant group reported significantly higher rates of comorbid allergies and more often met screening criteria for possible major depressive disorder, panic disorder, generalized anxiety disorder, and alcohol abuse disorder, as well as somatization disorder. The total number of possible mental disorders was correlated with chemical intolerance scores (P <.001). Controlling for demographics, patients with chemical intolerance were significantly more likely to have poorer functional status, with trends toward increased medical service use when compared with non-chemically intolerant patients. After controlling for comorbid psychiatric conditions, the groups differed significantly only regarding limitations of social activities.

CONCLUSIONS

Chemical intolerance occurs in 1 of 5 primary care patients yet is rarely diagnosed by busy practitioners. Psychiatric comorbidities contribute to functional limitations and increased health care use. Chemical intolerance offers an etiologic explanation. Symptoms may resolve or improve with the avoidance of salient chemical, dietary (including caffeine and alcohol), and drug triggers. Given greater medication intolerances in chemical intolerance, primary care clinicians could use the QEESI to identify patients for appropriate triage to comprehensive nonpharmacologic care.

Randomized trial of the effect of research design and publication characteristics on physician change

BACKGROUND

The primary barrier to translation of research into practice relates to physician use of research. If we are to succeed at translating research into practice, we must understand to which research characteristics and publication formats practitioners attend.

OBJECTIVE

To determine which characteristics of research design (sample characteristics, study design) and publication (type of publication) are most influential on the acquisition of knowledge and change in behavior of family practitioners.

METHOD

This randomized clinical trial was conducted in family practice offices on the 305 family physicians who scored lowest on a survey of knowledge about management of major depressive disorder (MDD), panic disorder, and generalized anxiety disorder (GAD). Subjects were randomly assigned to receive 1 of 3 MDD abstracts differing in study site, 1 of 3 panic disorder abstracts differing in study design, and 1 of 3 GAD communications differing in format. The main outcome measures (knowledge and management strategies) were assessed immediately following the intervention and again 6 months later. Data for the intervention survey were gathered in November 2002.

RESULTS

This study found significant increases in knowledge level and use of first-line agents with all interventions; however, knowledge declined again after 6 months for both panic disorder and GAD. The only statistically significant interoption difference was that the POEM (patient-oriented evidence that matters) was associated with better retention of knowledge of the treatment of GAD.

CONCLUSION

In conclusion, all interventions were associated with immediate increases in knowledge and use of first-line treatments. However, such gains were not retained for panic disorder and GAD. Except for better knowledge retention associated with POEM use, no consistent differences between intervention options were noted.

The research mentoring relationship in family medicine: findings from the grant generating project

BACKGROUND AND OBJECTIVES

Mentoring has been acknowledged as a critical factor in the development of family medicine academicians. Specific aims were to describe the research mentoring in family medicine from the experience of both mentors and protégés and identify characteristics that mentors and protégés associated with a successful mentoring relationship. The Grant Generating Project (GGP) Fellowship, a training and mentoring program for family medicine researchers, provided a natural opportunity to study these issues and better understand what is successful in research mentoring.

METHODS

Separate mentor and protégés surveys measured perceptions about the extent of mentoring assistance, perceived relationship success, costs and benefits of the relationship, and the nature and duration of the relationship. Correlations between demographic characteristics and the mentoring relationship were also examined.

RESULTS

Mentors were generally professors (78%), male (82%), with a mean age of 53 years, while protégés were assistant professors (53%) and almost evenly divided between male (51%) and female (49%) with mean age of 44 years. Both mentors and protégés describe the mentoring relationship in general to be of benefit to both mentor and protégé. Nonetheless, statistically significant differences between mentor-protégé responses were found for nine of the 20 survey items. Mentors tended to give higher values in their ratings of specific mentor-protégé relationship variables. Significant positive correlations were found between benefit, quality of the relationship, and mentoring assistance and the number of hours per month of mentor-protégé interaction, the number of mentor-protégé meetings per month, and the number of months the mentor worked with the protégé. Mentor-protégé acquaintance before the GGP fellowship was significantly correlated with cost, benefit, and mentoring assistance.

CONCLUSIONS

This study shows agreement between mentor and protégé regarding the mentors' ability to promote the protégés, provide important technical skills, convey respect for the protégés, and serve as a friend and role model. Protégés tend to be more connected with their colleagues and with their profession, perhaps in part because the mentoring relationship facilitates networking opportunities provided by the mentor. In particular, excellent mentors can provide protégés with opportunities to meet other influential scholars at conferences and/or through various forms of correspondence. Such relationships can be helpful to the protégé in developing a constellation of mentoring relationships that may result in more successful research careers. Future studies should examine the relationship upon various outcomes.

Issues important to the research mentoring relationship

BACKGROUND AND OBJECTIVES

Family medicine lacks a critical mass of experienced, federally funded researchers to serve as research mentors for young investigators. The purpose of this study was to identify issues important when mentoring junior investigators.

METHODS

Eight experienced primary care investigators, known for their excellence in mentorship, were recruited from the Primary Care Research Methods and Statistics Conference. After participation in a focus group exploring issues related to the quality, techniques, effectiveness, and efficiency of mentorship, subjects completed three rounds of Delphi using variables identified during the focus group to develop a comprehensive, stable list of 72 mentoring strategies.

RESULTS

Five items received perfect ratings of agreement: (1) primary task to help protégé identify long-term goals and strategize to meet them, (2) difference exists between mentoring and collaboration, (3) assigning mentor is not a guarantee that the relationship will work, (4) mentor can provide expertise and encouragement but not ensure a desired outcome, and (5) mentor who does not care about the protégé is not likely to be effective. The strategies with which the mentors disagreed included mentor-protégé characteristics and differences.

CONCLUSIONS

Mentors emphasized the importance of long-term goals, difference between mentorship and collaboration, and commitment from the mentor.

A method for estimating relative complexity of ambulatory care

PURPOSE

We wanted to demonstrate a method for calculating the relative complexity of ambulatory clinical encounters.

METHODS

Measures of complexity should reflect the complexity of the typical encounter and across encounters. If inputs represent the information transferred from the patient to the physician, then inputs include history, physical examination, testing, diagnoses, and patient demographics. Outputs include medications prescribed and other therapies used, including education and counseling, procedures performed, and disposition. The complexity of each input/output is defined as the mean input/output quantity per clinical encounter weighted by its inter-encounter diversity (range of possibilities used) and variability (visit-to-visit change). In complex systems, as the information in the input increases linearly, the complexity of the system increases exponentially. To assess the impact of the complexity of the encounter on the physician, we adjusted the estimated complexity by the duration-of-visit.

RESULTS

Using the 2000 NAMCS database, we calculated input and output complexities for 3 specialties. Construct validity was affirmed by comparing the relative rankings of complexity against relative rankings using other complexity-related measures. Although total relative complexity was similar for family medicine (44.04 +/- 0.0024 SE) and cardiology (42.78 +/- 0.0004 standard error [SE]), when adjusted for duration-of-visit, family medicine had a greater complexity density per hour (167.33 +/- 0.0095 SE) than either cardiology (125.4 +/- 0.0117 SE) or psychiatry (31.21 +/- 0.0027 SE).

CONCLUSIONS

This method estimates complexity based on the amount of care provided weighted by its diversity and variability. Such estimates could have broad use for interphysician comparisons as well as longitudinal applications.

Psychosocial effects of physical and verbal abuse in postmenopausal women

PURPOSE

The purpose of this study was to examine the psychological effects of physical and verbal abuse in a cohort of older women.

METHODS

This observational cohort study was conducted at 40 clinical sites nationwide that are part of the Women's Health Initiative (WHI) Observational Study. We surveyed 93,676 women aged 50 to 79 years using the mental health subscales and the combined mental component summary (MCS) score of the RAND Medical Outcomes Study 36-item instrument.

RESULTS

At baseline, women reporting exposure to physical abuse only, verbal abuse only, or both physical and verbal abuse had a greater number of depressive symptoms (1.6,1.6, and 3 more symptoms, respectively) and lower MCS scores (4.6, 5.4, and 8.1 lower scores, respectively) than women not reporting abuse. Compared with women who had no exposure to abuse, women had a greater increase in the number of depressive symptoms when they reported a 3-year incident exposure to physical abuse only (0.2; 95% confidence interval [CI], -0.21 to 0.60), verbal abuse only (0.18; 95% CI, 0.11 to 0.24), or both physical and verbal abuse (0.15; 95% CI, -0.05 to 0.36); and they had a decrease in MCS scores when they reported a 3-year incident exposure to physical abuse only (-1.12; 95% CI, -2.45 to 0.12), verbal abuse only (-0.55; 95% CI, -0.75 to -0.34), and both physical and verbal abuse (-0.44; 95% CI, -1.11 to -0.22) even after adjustment for sociodemographic characteristics.

CONCLUSION

Exposure to abuse in older, functionally independent women is associated with poorer mental health. The persistence of these findings suggests that clinicians need to consider abuse exposure in their older female patients who have depressive symptoms. Clinicians caring for older women should identify women at risk for physical and verbal abuse and intervene appropriately.

Culture-bound syndromes in Hispanic primary care patients

INTRODUCTION

We sought to document Hispanic primary care patients' knowledge and experience of five culture-bound syndromes (CBS), as well as the basic socio-cultural correlates of these disorders.

METHODS

A convenience sample of 100 adult Hispanic patients presenting in an urban South Texas primary care clinic was recruited to complete a brief cross-sectional survey, presented in an oral format. Interviews sought information concerning five culture-bound syndromes--susto, empacho, nervios, mal de ojo, and ataques de nervios. Additional demographic, socio-economic, and acculturation data was collected. Descriptive and bivariate statistics (chi square, Fisher's) were used to assess relationships among variables and experience with each CBS. A multivariate logistic analysis was conducted to determine the possible contributions of age, gender, acculturation, and education to the personal experience of a culture-bound syndrome.

RESULTS

Results indicate that 77% of respondents had knowledge of all five syndromes, with 42% reporting having personally experienced at least one CBS. Nervios was the most commonly suffered disorder, being reported by 30 respondents. This was followed, in declining order ofprevalence, by susto, mal de ojo, empacho, and ataques de nervios. Multivariate logistic regression analysis found that higher education beyond high school was associated with a slightly decreased likelihood of reporting having suffered from any culture-bound syndrome. While co-occurrence among these disorders occurred, the patterns of predictors suggest that the co-occurrence is not a reflection of mislabeling of one common syndrome.

CONCLUSION

Knowledge of and experience with culture-bound syndromes is common among Hispanic primary care patients in South Texas. Healthcare providers ought to consider discussing these illnesses in a non-judgmental manner with patients who present with symptoms that are consistent with these syndromes. Future studies, with larger sample sizes, are warranted to elucidate the nature of culture-bound disorders and their relationships with conventional diagnostic entities and treatment-seeking behaviors.

Lessons from Jurassic Park: patients as complex adaptive systems

RATIONALE

With realization that non-linearity is generally the rule rather than the exception in nature, viewing patients and families as complex adaptive systems may lead to a better understanding of health and illness. Doctors who successfully practise the 'art' of medicine may recognize non-linear principles at work without having the jargon needed to label them.

METHODS

Complex adaptive systems are systems composed of multiple components that display complexity and adaptation to input. These systems consist of self-organized components, which display complex dynamics, ranging from simple periodicity to chaotic and random patterns showing trends over time.

RESULTS

Understanding the non-linear dynamics of phenomena both internal and external to our patients can (1) improve our definition of 'health'; (2) improve our understanding of patients, disease and the systems in which they converge; (3) be applied to future monitoring systems; and (4) be used to possibly engineer change.

CONCLUSION

Such a non-linear view of the world is quite congruent with the generalist perspective.

Power laws in covariability of anxiety and depression among newly diagnosed patients with major depressive episode, panic disorder and controls

CONTEXT

Although symptoms of anxiety and depression correlate, they may covary in irregular and unpredictable ways. This non-linear covariation may be important to psychiatric diagnosis, treatment and relapse. This non-linear anxiety-depression interaction suggests that power laws may be observed. Power laws are statistical distributions found when systems vary in complex ways at the interface between chaotic dynamics and periodic dynamics, such that data points vary randomly but are still partially correlated with each other. Such non-linear dynamics and relationships should result in characteristic patterns of interaction among patients, stressors and treatment. This is important because non-linear dynamics could affect our understanding of mental disorders, the need for varied treatment approaches and patterns of early response to treatment.

OBJECTIVE

To determine whether the relationships between anxiety and depression levels, changes and rates of change follow power law distributions among patients with newly diagnosed major depressive episode (MDE), panic disorder (PD) and neither disorder (controls).

DESIGN

Time series of hourly mood variation. Setting Acute and continuity primary care clinics.

PATIENTS OR OTHER PARTICIPANTS

Five adult patients presenting each with MDE, PD and controls based on DSM-IV criteria. Four patients in each group completed 30 days of assessments. MAIN AND SECONDARY OUTCOME MEASURES: Hourly self-assessments (while awake) of levels of anxiety and depression using visual analogue scales for a 30-day period. Covariation in level of symptoms, in the change of symptoms and in the rate of change were assessed. Anxiety-depression matrices were prepared for pooled subjects. Power laws were sought using log-log plots of frequency versus order of that frequency.

RESULTS

Although visual inspection of plots for symptoms levels, change and rates of change all suggest power laws, statistical assessments provide stronger support for power laws in symptom change than for either symptom levels or rates of change. Adjusted R(2) terms are larger for MDE and PD subjects compared with controls while the inverse slope is about 2.5 for controls and 1.7-1.9 for those with MDE or PD. This study found that power laws may be present in both the symptom change data for all three diagnostic groups. Evidence for power laws in symptom levels and rates of change was less compelling. The inverse slopes suggest that the anxiety-depression relationships among subjects with PD and major depression are similar but differ from those among controls.

CONCLUSIONS

First, power laws suggest a scale-free relationship; the differences seen in transition from symptom level to change level may reflect that complex events at the level of mood assessment affect change in mood. Second, this covariation may be due to external factors acting on the patient or multiple internal interrelated factors. Third, different factors and populations can yield different slopes. Future research is needed to confirm these preliminary findings and to understand the origin of these dynamics.

Impact of spiritual symptoms and their interactions on health services and life satisfaction

PURPOSE

Recent work suggests that the biopsychosocial model should be expanded to include the spiritual dimension as well. The purpose of this study was to assess the independent effects of spiritual symptoms and their interactions with biopsychosocial symptoms on health care utilization, extreme use of services, and life satisfaction among primary care patients.

METHODS

Three hundred fifty-three adult waiting room patients at 2 primary care clinics completed the Biopsychosociospiritual Inventory (BioPSSI) as well as measures of life satisfaction and health care use. Hierarchical logistic regression analysis was performed with each outcome to determine whether adding spiritual symptoms and their interaction terms better accounted for outcomes than demographics, functional status, and chronic medical problems alone.

RESULTS

Spiritual symptoms (alone or in interaction) were associated with 7 of the 10 outcomes and were particularly important to extreme use of health care services and life satisfaction. Among best-fit models, spiritual symptoms alone were significantly associated with any mental health use (beta =0.694, P < or = .05), fair-poor health status (beta =0.837, P < or = .05), and life lacking meaning (beta =1.214, P < or = .001).

CONCLUSIONS

This study has shown the relevance of spiritual symptoms and their interactions to understanding health outcomes. Extreme utilization outcomes were related to the number of chronic problems, as well as to the social-spiritual interaction. Satisfaction outcomes were associated with physical and spiritual symptoms. These findings may have important implications for providing comprehensive, outcome-based care, as well as for modeling of research findings.

Chest pain and its importance in patients with panic disorder: an updated literature review

CONTEXT

Chest pain is a common symptom in primary care settings, associated with considerable morbidity and health care utilization. Failure to recognize panic disorder as the source of chest pain leads to increased health care costs and inappropriate management.

OBJECTIVE

To identify characteristics of the chest pain associated with the presence of panic disorder, review the consequences and possible mechanisms of chest pain in panic disorder, and discuss the recognition of panic disorder in patients presenting with chest pain.

DATA SOURCES

Potential studies were identified via a computerized search of MEDLINE and PsycINFO databases and review of bibliographies. MeSH headings used included panic disorder with chest pain, panic disorder with coronary disease or cardiovascular disorders or heart disorders, and panic disorder with cholesterol or essential hypertension or tobacco smoking.

STUDY SELECTION

The diagnosis of panic disorder in eligible studies was based on DSM criteria, and studies must have used objective criteria for coronary artery disease and risk factors. Only case control and cohort studies were included.

DATA SYNTHESIS

Although numerous chest pain characteristics (believed to be both associated and not associated with coronary artery disease) have been reportedly linked to panic disorder, only nonanginal chest pain is consistently associated with panic disorder (relative risk = 2.03, 95% CI = 1.41 to 2.92).

CONCLUSION

Chest pain during panic attacks is associated with increased health care utilization, poor quality of life, and phobic avoidance. Because the chest pain during panic attacks may be due to ischemia, the presence of panic attacks may go unrecognized. Ultimately, the diagnosis of panic disorder must be based on DSM criteria. However, once panic disorder is recognized, clinicians must remain open to the possibility of co-occurring coronary artery disease.

An exploration of the spiritual and psychosocial variables associated with husband-to-wife abuse and its effect on women in abusive relationships

OBJECTIVES

The purpose was to: 1) determine which aspects of religious belief incompatibility were associated with husband-to-wife abuse; 2) determine whether religious coping was independently associated with functional status among victims of spousal abuse; and 3) whether degree of abuse correlated with degrees of religious belief incompatibility or functional status among abused wives.

METHOD

Couples were asked to complete a structured interview concerning marital satisfaction, argument frequency, alcohol use, witnessing violence as a child, spirituality, functional status, and domestic violence.

RESULTS

In four areas of spiritual belief (sense of being judged, closeness to God, congregational benefits, forgiveness), religious belief incompatibility significantly predicted abuse. Perceived congregational help and religious coping were associated with improved social support. Finally, abuse severity and duration correlated with functional status but not with degree of religious belief incompatibility.

CONCLUSIONS

The addition of religious belief incompatibility may account for more variance in husband-to-wife abuse than non-spiritual predictors alone. Although the presence of abuse was associated with poorer functional status in women, religious coping was only linked to improved social support.

Differences in childhood sexual abuse experience between adult Hispanic and Anglo women in a primary care setting

The literature on racial and ethnic factors in childhood sexual abuse is limited. The purpose of this exploratory study was to document Hispanic-Anglo differences in childhood sexual abuse experiences and assess whether these differences may be explained by socio-demographic and family environmental differences. Adult Hispanic (n = 69) and Anglo (n = 19) women from a family medicine clinic waiting room reporting a history of childhood sexual abuse completed an in-depth survey concerning the sexual abuse experience and their childhood environment. In this study, Hispanics were more likely to report a family member as the perpetrator and to experience more self-blame as a result of the abuse. Hispanics were also more likely to take action in response to the abuse, especially those who were more acculturated to U.S. culture. However, most of the observed differences in this study could be explained by socio-demographic or family environment variables, not by ethnic background. Qualitative research on the family environments of Hispanic victims of child sexual abuse may further explicate the dynamics and risk factors for abuse by family members.

Psychiatric comorbidity in women with a history of childhood sexual abuse

Childhood sexual abuse (CSA) is associated with the development of numerous adult mental disorders. Women with a history of CSA were surveyed concerning their abuse experience and prevalence of DSM-IV mental disorders. The 63 women in the low morbidity cluster had a mean of 1.02 disorders. The 11 women in the moderate morbidity cluster had a mean of 2.36 disorders. The 16 women in the severe morbidity cluster had a mean of 4.75 disorders. Childhood family environment and CSA during preschool years were important predictors of morbidity cluster membership.

Reflections on DSM classification and its utility in primary care: case studies in "mental disorders"

BACKGROUND

This case series was conducted to demonstrate the limitations of the DSM system in primary care patients.

METHOD

Sixty family health center patients free of mental disorders according to DSM-IV criteria completed monthly quantitative interviews, using multiple rating instruments, concerning the levels of psychiatric symptoms, presence of distress and/or a mental disorder, functional status, support, and stressors. In addition, a purposive sample of 16 subjects completed an in-depth qualitative interview concerning their situation at the time they crossed a DSM threshold. Data were collected from April 2000 to March 2001.

RESULTS

Overall, there were 14 subjects with distress alone, 6 subjects with subthreshold disorders, and 3 subjects with known transient (< 2 months' duration) threshold disorders. Thus, even with the incomplete longitudinal data in this study, the clinical needs of 23 (38%) of the original 60 subjects were inadequately met by the DSM criteria. From the 10 subjects who crossed a DSM threshold and completed a qualitative interview, we selected 5 case studies with the most complete and complementary quantitative and qualitative data to illustrate several findings regarding the utility of the DSM classification in primary care. First, these cases show that psychological symptoms and DSM disorders vary considerably. Second, distress and subthreshold disorders are often seen in primary care patients. Third, the crossing of a DSM threshold corresponds to extreme levels of psychological symptoms and may therefore represent symptom severity. Fourth, psychological symptoms are often linked to physical illness. Finally, the context in which these symptoms and disorders develop often produces complex dynamic patterns.

CONCLUSIONS

The current DSM system failed to adequately reflect the spectrum and context of mental illness in patients from a predominantly low-income, Hispanic primary care population.

Predictors and outcomes in people told that they have panic attacks

We sought to identify predictors of being told the diagnosis of panic by health care providers and to assess whether being told affected outcomes. We collected data about care-seeking behavior, panic and family characteristics, psychiatric comorbidity, and illness behaviors. Outcomes included psychiatric symptomatology, disability, substance use, and control. Presentation to an emergency department and the number of mental health sites used predicted being told. Patient predictors centered on symptom severity. Being told was not associated with outcomes. Hence, care-seeking from emergency departments and mental health sites as well as symptom severity predicted being told but not better outcomes.

Interview versus self-answer methods of assessing health and emotional functioning in primary care patients

The present study examined differences in health and emotional functioning when two different methods of gathering self-report data were used. Of 80 primary care patients who did not meet screening criteria for a psychiatric diagnosis, 44 were randomly assigned to have an interviewer read assessment items and record the participants' responses, and 36 were randomly assigned to have an interviewer read the items and have participants record their own responses directly on the test forms. There were negligible significant differences between the groups in reported symptomatology. From a practical standpoint, this suggests that the self-answer method is a more economical and efficient method of data collection since the data from more than one participant can be gathered at the same time. The findings also suggest that the measures in this study which were originally intended to be completed in a paper-and-pencil format can be used in a more traditional interviewer-administered format.

Psychometric assessment of measures of psychological symptoms, functional status, life events, and context for low income Hispanic patients in a primary care setting

This study assessed the psychometric properties of a set of nine commonly used lists in an English-speaking Hispanic sample taken from a primary care setting. Those were the General Health Questionnaire-12, the Anxiety, Depression, and Somatization scales from the SCL-90, the Medical Outcomes Study Short Form-36, the Holmes and Rahe Family Life Changes, abbreviated versions of the Daily Hassles and Uplifts, the Herth Hope Index, Duke Social Support and Stress scales, Alcohol Use Disorders Identification Test, and Marlowe-Crowne Brief Social Desirability Scale. 68 adult patients completed the measures via structured interview. Internal consistency was measured using Cronbach alpha and the Kuder-Richardson-20. Construct validity was assessed using Pearson correlations among sets of scores. Internal consistencies were good-to-excellent for all measures except for the Duke Social Support and Stress scales (Stress scale), and the Brief Social Desirability Scale. Construct validity was suggested for all except the Mental Health and Energy/Fatigue scales of the Short Form-36. Further study is needed to verify these results in other Hispanic populations and to address other forms of reliability and validity.

The ability of the stress process model to explain mental health outcomes

No theory adequately explicates the relationships between stress, social support, and health. The recently developed Stress Process Model incorporates multiple levels of support and stress at the individual, family, and community level, with a focus on predicting mental health outcomes. The purpose of this study was to use an existing database to assess the predictive value of the Stress Process Model in explaining mental health outcomes in community-dwelling subjects with and without panic attacks. This study is a secondary analysis using data obtained in 1990 through 1991 for the Panic Attack Care-Seeking Threshold (PACT) study. Subjects who agreed to participate completed an in-depth interview concerning demographic features, panic characteristics, chronic medical problems, family characteristics, illness attitudes and behaviors, coping strategies, symptom perceptions, psychiatric morbidity, health care utilization, and functional status. The utility of the Stress Process Model is supported by three lines of reasoning. First, most of the relationships predicted by the model were documented in this study. Second, the model accounted for significant amounts of variance in moderating factors, primary and secondary stressors, and mental health outcomes. Finally, two of the three hypotheses were supported by this study. The integration of family and neighborhood variables into the stress process should be attractive to mental health workers in primary care and community settings.

Predictors of short-term and long-term scholarly activity by academic faculty: a departmental case study

BACKGROUND AND OBJECTIVES

What leads to individual success or failure in family medicine scholarly activity? We prospectively studied predictors of short-term (2 years) and long-term (5 years) scholarly productivity in the faculty of one university family medicine department.

METHODS

All department faculty (n=37) between 1986 and 1998 completed an annual survey of their scholarly activities (238 person years). Using bivariate and multiple regression analyses, we examined the influence of faculty demographics, professional degrees and training, academic rank, and responsibilities in areas such as patient care, teaching, and administration on 2-year and 5-year output of presentations, publications, and grants.

RESULTS

Productivity (defined as publications, external presentations, and funded grants) declined with time since medical school graduation. PhD and MD/MS faculty were more productive than MD faculty. Fellowship training was also associated with greater productivity, as was national service to journals and grant review panels. Administrative activity below the level of department chair or vice chair did not detract from scholarly activity. Clinical time demonstrated only a weak, nonsignificant negative correlation with most of our scholarly activity measures.

CONCLUSIONS

As previously noted, research training through advanced degrees or fellowships enhances scholarly activity. The effect on scholarly productivity of time spent in clinical work or on administrative tasks requires further study across different departments.

Factors influencing care seeking for a self-defined worst panic attack

OBJECTIVE

Only 60 percent of persons who experience panic attacks seek treatment for them, many at the emergency department. The author documented care-seeking behaviors among persons living in the community who had experienced panic attacks and studied determinants of care seeking.

METHODS

In-depth structured interviews were conducted with 97 randomly selected community-dwelling adults who met DSM-III-R criteria for panic attacks. Participants were asked whether they had contemplated using or had actually used medical, alternative, and family sources of care when they had experienced their worst attack.

RESULTS

Seventy-seven participants (79 percent) had considered using a general medical or mental health site when they experienced their worst attack. Of these, 50 (52 percent) had actually used such a site. General medical sites were contemplated more often (72 percent of participants) than mental health sites (27 percent), particularly emergency departments (43 percent) and family physicians' offices (34 percent). Other sources, such as friends or family members, alternative sites, and self-treatment, were contemplated less often. Once contemplated, certain sources were readily used, such as ambulances, family members, and self-treatment. Several factors were significantly associated with whether a person contemplated seeking care: access or barriers to treatment, perception of symptoms and of the reasons for the panic attack, and family-related variables.

CONCLUSIONS

Contemplation and use of a mental health site after a panic attack was rare among the participants in this study. Further study of determinants of care seeking may help explain why persons who experience panic attacks fail to seek treatment or seek treatment from non-mental health sources.

Community correlates of outcomes in subjects with panic attacks

The purpose of this study was to document the association between community factors and mental health outcomes in subjects with panic attacks. Randomly selected adults from 18 census tracts were screened for the presence of panic attacks. A structured interview was used to assess health care utilization, psychiatric morbidity, quality of life, and sense of control over panic. Community measures were obtained from census data. Regression analyses found that each community measure was associated with at least one outcome even when adjusted for individual socioeconomic status and barriers to access. Research concerning mental health outcomes in subjects with panic attacks should include community-level data.

Symptom severity and perceptions in subjects with panic attacks

OBJECTIVES

To (1) identify aspects that defined the self-perceived worst panic attack, (2) determine how subjects with panic attacks perceive symptoms compared with control subjects, and (3) determine the role of symptom perceptions in seeking care for the worst panic attack.

DESIGN

Cross-sectional survey.

SETTING

Community-based.

PATIENTS OR OTHER PARTICIPANTS

Ninety-seven subjects with panic attacks as defined by the Diagnostic and Statistical Manual of Mental Disorders, Revised Third Edition (with or without panic disorder), and 97 demographically matched controls.

INTERVENTION

None.

MAIN OUTCOME MEASURES

Subjects and controls completed the Symptom Perception Scales, and subjects with panic attacks completed the Acute Panic Inventory and a questionnaire concerning care-seeking behavior for their self-perceived worst attack.

RESULTS

Compared with controls, subjects with panic attacks perceived many symptoms as more embarrassing but differed little in their perceptions of need for treatment, threat to life, and disruption of functioning. Particular symptoms (ie, dyspnea, fear, dizziness, and faintness) tended to differ in most perceptions. However, symptom perceptions did not play a significant role in care-seeking behavior for the worst attack.

CONCLUSIONS

Subjects with panic attacks perceive symptoms as more embarrassing than controls, and have different perceptions about particular symptoms. Cognitive approaches addressing negative patient perceptions may reduce anxiety, inappropriate use of health care services, and adverse outcomes. Arch Fam Med. 2000;9:1028-1035

Effect of attendance at an annual primary care research methods conference on research productivity and development

BACKGROUND AND OBJECTIVES

This study determined whether attendance at a research methods conference is associated with an increase in research productivity in conference participants and identified predictors in participants of postconference productivity measures.

METHODS

We mailed survey instruments to 423 participants who attended the Primary Care Research Methods and Statistics Conference between 1986 and 1995 to document their professional characteristics, conference attendance, and preconference and postconference research productivity. In addition, respondents were asked to send us their curriculum vitae (CV) and the CV of a colleague with a similar interest in research who had never attended the conference.

RESULTS

A total of 294 participants completed the survey, and 40 of these sent the CV of a colleague. Preconference and postconference changes in research publications and presentations were significant, especially in novice researchers. Regression analyses found that the number of conferences attended predicted postconference publications, presentations, and current research activity. Compared to colleagues who never attended the conference, postconference total publications and presentations were higher in conference participants.

CONCLUSIONS

Attendance at a research skills conference was associated with increased postconference research productivity, compared with preconference productivity and that of matched controls.

Associations with subsyndromal panic and the validity of DSM-IV criteria

The purpose of this study was to compare subsyndromal panic--infrequent panic (IP) and limited symptom attacks (LSA)--with panic disorder (PD) in psychiatric comorbidity, quality of life (QOL), and health care utilization and to assess validity of DSM-III-R criteria for panic disorder. Randomly selected adults were screened for the presence of PD, IP, and LSA by using the Structured Clinical Interview of the DSM-IIIR. Subjects with panic symptoms and matched controls completed a structured interview concerning comorbidity, QOL, and utilization. Although PD and IP subjects reported more psychiatric comorbidity than did LSA subjects, LSA subjects had more comorbid conditions than did controls. Differences in utilization were limited to PD subjects. Although subsyndromal panic was associated with poor QOL, panic-related work disability was primarily seen in PD subjects. Regression analyses demonstrated little difference between LSA and IP subjects, but interaction analysis supported the distinction between LSA and full-blown panic attacks. Compared with controls, LSA and IP subjects had more psychiatric comorbidity. PD subjects also had poorer QOL and more utilization. Interaction analysis supports DSM-IV criteria for panic disorder.

Progression of limited symptom attacks

To study the progression of limited symptom attacks (LSAs) to panic attacks, we screened a community sample for LSAs using the Structured Clinical Interview of the DSM-IIIR initially and one year thereafter. Of 21 subjects with LSAs initially, 4 (19%) reported progression of their LSAs to panic attacks after one year.