Biomedical subjects

W J Katon

Publications and source records attributed to W J Katon.

At least 19 recordsLinked to original sources

PubMed2002

Psychiatric illness and subsequent traumatic brain injury: a case control study.

OBJECTIVE: To determine whether psychiatric illness is a risk factor for subsequent traumatic brain injury (TBI). METHODS: Case control study in a large staff model health maintenance organisation in western Washington State. Patients with TBI, determined by International classification of diseases, 9th revision, clinical modification (ICD-9-CM) diagnoses, were 1440 health plan members who had TBI diagnosed in 1993 and who had been enrolled in the previous year, during which no TBI was ascertained. Three health plan members were randomly selected as control subjects, matched by age, sex, and reference date. Psychiatric illness in the year before the TBI reference date was determined by using computerised records of ICD-9-CM diagnoses, psychiatric medication prescriptions, and utilisation of a psychiatric service. RESULTS: For those with a psychiatric diagnosis in the year before the reference date, the adjusted relative risk for TBI was 1.7 (95% confidence interval (CI) 1.4 to 2.0) compared with those without a psychiatric diagnosis. Patients who had filled a psychiatric medication prescription had an adjusted relative risk for TBI of 1.6 (95% CI 1.2 to 2.1) compared with those who had not filled a psychiatric medication prescription. Patients who had utilised psychiatric services had an adjusted relative risk for TBI of 1.3 (95% CI 1.0 to 1.6) compared with those who had not utilised psychiatric services. The adjusted relative risk for TBI for patients with psychiatric illness determined by any of the three psychiatric indicators was 1.6 (95% CI 1.4 to 1.9) compared with those without any psychiatric indicator. CONCLUSION: Psychiatric illness appears to be associated with an increased risk for TBI.

Adolescent↗

PubMed2001

Two-year effects of quality improvement programs on medication management for depression.

BACKGROUND: Significant underuse of evidence-based treatments for depression persists in primary care. We examined the effects of 2 primary care-based quality improvement (QI) programs on medication management for depression. METHODS: A total of 1356 patients with depressive symptoms (60% with depressive disorders and 40% with subthreshold depression) from 46 primary care practices in 6 nonacademic managed care organizations were enrolled in a randomized controlled trial of QI for depression. Clinics were randomized to usual care or to 1 of 2 QI programs that involved training of local experts who worked with patients' regular primary care providers (physicians and nurse practitioners) to improve care for depression. In the QI-medications program, depression nurse specialists provided patient education and assessment and followed up patients taking antidepressants for up to 12 months. In the QI-therapy program, depression nurse specialists provided patient education, assessment, and referral to study-trained psychotherapists. RESULTS: Participants enrolled in both QI programs had significantly higher rates of antidepressant use than those in the usual care group during the initial 6 months of the study (52% in the QI-medications group, 40% in the QI-therapy group, and 33% in the usual care group). Patients in the QI-medications group had higher rates of antidepressant use and a reduction in long-term use of minor tranquilizers for up to 2 years, compared with patients in the QI-therapy or usual care group. CONCLUSIONS: Quality improvement programs for depression in which mental health specialists collaborate with primary care providers can substantially increase rates of antidepressant treatment. Active follow-up by a depression nurse specialist in the QI-medications program was associated with longer-term increases in antidepressant use than in the QI model without such follow-up.

Adult↗

PubMed2001

The patient-provider relationship: attachment theory and adherence to treatment in diabetes.

OBJECTIVE: Lack of adherence to diabetic self-management regimens is associated with a high risk of diabetes complications. Previous research has shown that the quality of the patient-provider relationship is associated with adherence to diabetes treatment. This study attempts to improve understanding of both patient and provider factors involved in lack of adherence to treatment in diabetic patients by using the conceptual model of attachment theory. METHOD: Instruments that assessed attachment, treatment adherence, depression, diabetes severity, patient-provider communication, and demographic data were administered to 367 patients with type 1 and 2 diabetes in a health maintenance organization primary care setting. Glucose control, medical comorbidity, and adherence to medications and clinic appointments were determined from automated data. Analyses of covariance were used to determine if attachment style and quality of patient-provider communication were associated with adherence to treatment. RESULTS: Patients who exhibited dismissing attachment had significantly worse glucose control than patients with preoccupied or secure attachment. An interaction between attachment and communication quality was significantly associated with glycosylated hemoglobin (Hb A(1c)) levels. Among the patients with a dismissing attachment style, there was a significant difference in glycosylated hemoglobin levels between those who rated their patient-provider communication as poor (mean=8.50%, SD=1.55%) and those who rated this communication as good (mean=7.49%, SD=1. 33%). Among all patients who were taking oral hypoglycemics, adherence to medications and glucose monitoring was significantly worse in patients who exhibited dismissing attachment and rated their patient-provider communication as poor. CONCLUSIONS: Dismissing attachment in the setting of poor patient-provider communication is associated with poorer treatment adherence in patients with diabetes.

Aged↗

PubMed2001

Cost-effectiveness of a collaborative care program for primary care patients with persistent depression.

OBJECTIVE: The authors evaluated the incremental cost-effectiveness of stepped collaborative care for patients with persistent depressive symptoms after usual primary care management. METHOD: Primary care patients initiating antidepressant treatment completed a standardized telephone assessment 6-8 weeks after the initial prescription. Those with persistent major depression or significant subthreshold depressive symptoms were randomly assigned to continued usual care or collaborative care. The collaborative care included systematic patient education, an initial visit with a consulting psychiatrist, 2-4 months of shared care by the psychiatrist and primary care physician, and monitoring of follow-up visits and adherence to medication regimen. Clinical outcomes were assessed through blinded telephone assessments at 1, 3, and 6 months. Health services utilization and costs were assessed through health plan claims and accounting data. RESULTS: Patients receiving collaborative care experienced a mean of 16.7 additional depression-free days over 6 months. The mean incremental cost of depression treatment in this program was $357. The additional cost was attributable to greater expenditures for antidepressant prescriptions and outpatient visits. No offsetting decrease in use of other health services was observed. The incremental cost-effectiveness was $21.44 per depression-free day. CONCLUSIONS: A stepped collaborative care program for depressed primary care patients led to substantial increases in treatment effectiveness and moderate increases in costs. These findings are consistent with those of other randomized trials. Improving outcomes of depression treatment in primary care requires investment of additional resources, but the return on this investment is comparable to that of many other widely accepted medical interventions.

Adult↗

PubMed2001

Mental illness, functional impairment, and patient preferences for collaborative care in an uninsured, primary care population.

OBJECTIVE: Our goal was to compare the prevalence of mental illness and its impact on functional status in an indigent uninsured primary care population with a general primary care sample. We also hoped to assess patient preferences about mental health and medical service integration. STUDY DESIGN: We compared a survey of consecutive primary care adults in April and May 1999 with a 1997-98 survey of 3000 general population primary care patients. Both studies used the Primary Care Evaluation of Mental Disorders Patient Health Questionnaire and the 20-question Medical Outcomes Study Short Form. POPULATION: The patients were from a private nonprofit primary care clinic in Grand Junction, Colorado, that served only low-income uninsured people. We approached a total of 589 consecutive patients and enrolled 500 of them. MAIN OUTCOME MEASURE: The main outcomes were the prevalence of psychiatric illnesses and the relationship with functional impairment. We compared our findings with a more generalizable primary care population. RESULTS: This low-income uninsured population had a higher prevalence of 1 or more psychiatric disorders (51% vs 28%): mood disorders (33% vs 16%), anxiety disorders (36% vs 11%), probable alcohol abuse (17% vs 7%), and eating disorders (10% vs 7%). Having psychiatric disorders was associated with lower functional status and more disability days compared with not having mental illness. Patients indicated a preference for mental health providers and medical providers to communicate about their care. CONCLUSIONS: This low-income uninsured primary care population has an extremely high prevalence of mental disorders with impaired function. It may be important in low-income primary care settings to include collaborative care designs to effectively treat common mental disorders, improve functional status, and enhance patient self-care.

Adolescent↗

PubMed2000

Depression and diabetes: impact of depressive symptoms on adherence, function, and costs.

BACKGROUND: Depression is common among patients with chronic medical illness. We explored the impact of depressive symptoms in primary care patients with diabetes on diabetes self-care, adherence to medication regimens, functioning, and health care costs. METHODS: We administered a questionnaire to 367 patients with types 1 and 2 diabetes from 2 health maintenance organization primary care clinics to obtain data on demographics, depressive symptoms, diabetes knowledge, functioning, and diabetes self-care. On the basis of automated data, we measured medical comorbidity, health care costs, glycosylated hemoglobin (HbA(1c)) levels, and oral hypoglycemic prescription refills. Using depressive symptom severity tertiles (low, medium, or high), we performed regression analyses to determine the impact of depressive symptoms on adherence to diabetes self-care and oral hypoglycemic regimens, HbA(1c) levels, functional impairment, and health care costs. RESULTS: Compared with patients in the low-severity depression symptom tertile, those in the medium- and high-severity tertiles were significantly less adherent to dietary recommendations. Patients in the high-severity tertile were significantly distinct from those in the low-severity tertile by having a higher percentage of days in nonadherence to oral hypoglycemic regimens (15% vs 7%); poorer physical and mental functioning; greater probability of having any emergency department, primary care, specialty care, medical inpatient, and mental health costs; and among users of health care within categories, higher primary (51% higher), ambulatory (75% higher), and total health care costs (86% higher). CONCLUSIONS: Depressive symptom severity is associated with poorer diet and medication regimen adherence, functional impairment, and higher health care costs in primary care diabetic patients. Further studies testing the effectiveness and cost-effectiveness of enhanced models of care of diabetic patients with depression are needed. Arch Intern Med. 2000;160:3278-3285.

Adult↗

PubMed2000

Acute infectious mononucleosis: characteristics of patients who report failure to recover.

PURPOSE: We sought to determine how often acute mononucleosis precipitates chronic illness, and to describe the demographic, clinical, and psychosocial features that characterize patients who report failure to recover. SUBJECTS AND METHODS: We enrolled 150 patients with infectious mononucleosis during the acute illness and asked them to assess their recovery at 2 and 6 months. At baseline, we performed physical and laboratory examinations; obtained measures of psychological and somatic functioning, social support, and life events; and administered a structured psychiatric interview. RESULTS: Self-assessed failure to recover was reported by 38% of patients (55 of 144) at 2 months and by 12% (17 of 142) at 6 months. Those who had not recovered reported a persistent illness characterized by fatigue and poor functional status. No objective measures of disease, including physical examination findings or serologic or laboratory markers, distinguished patients who failed to recover from those who reported recovery. Baseline predictors for failure to recover at 2 months were older age (odds ratio [OR] = 1.4, 95% confidence interval [CI]: 1.1 to 1.8, per 5-year increase), higher temperature (OR = 1.5, 95% CI: 1.1 to 2.2, per 0.5 degrees C increase), and greater role limitation due to physical functioning (OR = 1.5, 95% CI: 1.2 to 1.9, per 20-point decrease in Short Form-36 score). At 6 months, baseline predictors for failure to recover included female sex (OR = 3.3, 95% CI: 1.0 to 12), a greater number of life events more than 6 months before the disease began (OR = 1.7, 95% CI: 1.1 to 2.5, per each additional life event), and greater family support (OR = 1.9, 95% CI: 1.1 to 4.2, per 7-point increase in social support score). CONCLUSIONS: We were not able to identify objective measures that characterized self-reported failure to recover from acute infectious mononucleosis. The baseline factors associated with self-reported failure to recover at 2 months differed from those associated with failure to recover at 6 months. Future studies should assess the generalizability of these findings and determine whether interventions can hasten recovery.

Activities of Daily Living↗

PubMed2000

Depression, fatigue, and functional disability in patients with chronic hepatitis C.

OBJECTIVE: To examine the extent to which fatigue and functional disability correlate with severity of depressive symptoms in patients with chronic hepatitis C. METHODS: Fifty patients with chronic hepatitis C were evaluated using structured psychiatric interviews and standardized rating instruments. RESULTS: Fourteen (28%) of patients had current depressive disorders. Depressed and nondepressed patients did not differ with regard to demographics or hepatic disease severity. Severity of depressive symptoms was highly correlated with fatigue severity while measures of hepatic disease severity, interferon treatment, and severity of comorbid medical illness were not. Severity of depressive symptoms was associated with functional disability and somatization. CONCLUSIONS: Disability and fatigue are more closely related to depression severity than to hepatic disease severity. Antidepressant treatment trials in patients with hepatitis C are indicated to determine whether improvement in depressive symptoms leads to improvement in fatigue and functioning.

Adolescent↗

PubMed2000

Predictors of outcome in a primary care depression trial.

OBJECTIVE: Previous treatment trials have found that approximately one third of depressed patients have persistent symptoms. We examined whether depression severity, comorbid psychiatric illness, and personality factors might play a role in this lack of response. DESIGN: Randomized trial of a stepped collaborative care intervention versus usual care. SETTING: HMO in Seattle, Wash. PATIENTS: Patients with major depression were stratified into severe (N = 149) and mild to moderate depression (N = 79) groups prior to randomization. INTERVENTIONS: A multifaceted intervention targeting patient, physician, and process of care, using collaborative management by a psychiatrist and primary care physician. MEASUREMENTS AND MAIN RESULTS: Patients with more severe depression had a higher risk for panic disorder (odds ratio [OR], 5.8), loneliness (OR, 2.6), and childhood emotional abuse (OR, 2.1). Among those with less severe depression, intervention patients showed significantly improved depression outcomes over time compared with those in usual care (z = -3.06, P<.002); however, this difference was not present in the more severely depressed groups (z = 0.61, NS). Although the group with severe depression showed differences between the intervention and control groups from baseline to 3 months that were similar to the group with less severe depression (during the acute phase of the intervention), these differences disappeared by 6 months. CONCLUSIONS: Initial depression severity, comorbid panic disorder, and other psychosocial vulnerabilities were associated with a decreased response to the collaborative care intervention. Although the intervention was appropriate for patients with moderate depression, individuals with higher levels of depression may require a longer continuation phase of therapy in order to achieve optimal depression outcomes.

Adult↗

PubMed2000

Physical activity and subarachnoid haemorrhage: a population based case-control study.

OBJECTIVE: To evaluate physical activity as a risk factor for subarachnoid haemorrhage. METHODS: A population based case-control study in King County, Washington. A standardised, personal interview was used to determine physical activity during the past year and at the onset of the bleed for case patients and a similar reference time for control subjects. Conditional logistic regression and a case cross over analysis were performed in which each case patient served as his or her own control. Subjects were 149 men and women with incident, spontaneous subarachnoid haemorrhage and two control subjects per case patient. Control subjects were identified through random digit dialing and matched on age, sex, and respondent type. RESULTS: Four of the 149 (2.7%) case patients were engaged in vigorous physical activity at the time of their subarachnoid haemorrhage. With those who were engaged in non-vigorous or no physical activity serving as the reference group, the relative risk of sustaining a subarachnoid haemorrhage for those engaged in vigorous physical activity was 11.6 (95% confidence interval (95% CI) 1.2-113.2). In the case cross over analysis, the relative risk was 15.0 (95% CI 4.3-52.2). Higher levels of long term regular physical activity over the past year were associated with a lower, but not statistically significant, risk of subarachnoid haemorrhage (test for trend, p=0.3). CONCLUSION: The risk of subarachnoid haemorrhage is increased during vigorous physical activity, although only a few result from this mechanism.

Adult↗

PubMed2000

Sertraline in the treatment of major depression following mild traumatic brain injury.

An 8-week, nonrandomized, single-blind, placebo run-in trial of sertraline was conducted on 15 patients diagnosed with major depression between 3 and 24 months after a mild traumatic brain injury. On the Hamilton Rating Scale for Depression, 13 (87%) had a decrease in score of > or = 50% ("response"), and 10 (67%) achieved a score of < or = 7 ("remission") by week 8 of sertraline. There was statistically significant improvement in psychological distress, anger and aggression, functioning, and postconcussive symptoms with treatment.

Adult↗

PubMed1999

Adult health status of women with histories of childhood abuse and neglect.

PURPOSE: Several recent studies have found associations between childhood maltreatment and adverse adult health outcomes. However, methodologic problems with accurate case determination, appropriate sample selection, and predominant focus on sexual abuse have limited the generalizability of these findings. SUBJECTS AND METHODS: We administered a survey to 1,225 women who were randomly selected from the membership of a large, staff model health maintenance organization in Seattle, Washington. We compared women with and without histories of childhood maltreatment experiences with respect to differences in physical health status, functional disability, numbers and types of self-reported health risk behaviors, common physical symptoms, and physician-coded ICD-9 diagnoses. RESULTS: A history of childhood maltreatment was significantly associated with several adverse physical health outcomes. Maltreatment status was associated with perceived poorer overall health (ES = 0.31), greater physical (ES = 0.23) and emotional (ES = 0.37) functional disability, increased numbers of distressing physical symptoms (ES = 0.52), and a greater number of health risk behaviors (ES = 0.34). Women with multiple types of maltreatment showed the greatest health decrements for both self-reported symptoms (r = 0.31) and physician coded diagnoses (r = 0.12). CONCLUSIONS: Women with childhood maltreatment have a wide range of adverse physical health outcomes.

Adult↗

PubMed1999

Can enhanced acute-phase treatment of depression improve long-term outcomes? A report of randomized trials in primary care.

OBJECTIVE: The authors' goal was to determine whether improved outcomes from enhanced acute-phase (3-month) treatment for depression in primary care persisted. METHOD: They conducted a 19-month follow-up assessment of 156 patients with major depression in the Collaborative Care intervention trials, which had found greater improvements in treatment adherence and depressive symptoms at 4 and 7 months for patients given enhanced acute-phase treatment than for patients given routine treatment in a primary care setting. Sixty-three of the 116 patients who completed the follow-up assessment had received enhanced treatment, and 53 had received routine treatment in primary care. The Inventory for Depressive Symptomatology and the Hopkins Symptom Checklist were used to measure depressive symptoms. Automated pharmacy data and self-reports were used to assess adherence to and adequacy of pharmacotherapy. RESULTS: At 19 months, the patients who had received enhanced acute-phase treatment did not differ from those who had received routine primary care treatment in clinical outcomes or quality of pharmacotherapy. CONCLUSIONS: Even though enhanced acute-phase treatment of depression in primary care resulted in better treatment adherence and better clinical outcomes at 4 and 7 months, these improvements failed to persist over the following year. Continued enhancement of depression treatment may be needed to ensure better long-term results.

Adult↗

PubMed1999

Panic disorder in the primary care setting: comorbidity, disability, service utilization, and treatment.

BACKGROUND: Increased medical service utilization in patients with panic disorder has been described in epidemiologic studies, although service use in primary care panic patients relative to other primary care patients is less well characterized. Inadequate recognition of panic has been shown in several primary care studies, although the nature of usual care for panic in this setting has not been well documented. This study aimed to document increased service use in panic patients relative to other primary care patients and to characterize the nature of their usual care for panic and their outcome. METHOD: Using a waiting room screening questionnaire and follow-up telephone interview with the Composite International Diagnostic Interview, we identified a convenience sample of 81 patients with panic disorder (DSM-IV) and a control group of 183 psychiatrically healthy patients in 3 primary care settings on the West Coast and determined psychiatric diagnostic comorbidity, panic characteristics, disability, and medical and mental health service use, including medications. A subsample (N = 41) of panic patients was reinterviewed 4-10 months later to determine the persistence of panic and the adequacy of intervening treatment received using the Harvard/Brown Anxiety Disorders Research Program study criteria for cognitive-behavioral therapy (CBT) and an algorithm developed by the authors for medications. RESULTS: Seventy percent of panic patients had a comorbid psychiatric diagnosis. Patients had more disability in the last month (days missed or cut down activities) (p < .01), more utilization of emergency room and medical provider visits (p < .01), and more mental health visits (p < .05). Despite the latter, only 42% received psychotropic medication, 36% psychotherapy, and 64% any treatment. On follow-up, 85% still met diagnostic criteria for panic, and only 22% had received adequate medication (type and/or dose) and 12% adequate (i.e., CBT) psychotherapy. CONCLUSION: These findings suggest a need for improved treatment interventions for panic disorder in the primary care setting to decrease disability and potentially inappropriate medical service utilization.

Adult↗

PubMed1999

Best clinical practice: guidelines for managing major depression in primary medical care.

Practice guidelines such as those of the United States Public Health Service Agency for Health Care Policy and Research have been instrumental in addressing the significant problem of how best to manage major depression in primary medical care settings. Since this set of guidelines was published in 1993, new findings from randomized clinical trials and extensive clinical experience permit us to reevaluate trends in treatment of major depression in primary medical care. This review suggests guidelines for achieving best clinical practice given current knowledge.

Antidepressive Agents↗

PubMed1998

Medically unexplained symptoms in primary care.

Fourteen common physical symptoms are responsible for almost half of all primary care visits. Only about 10% to 15% of these symptoms are found to be caused by an organic illness over a 1-year period. Patients with medically unexplained symptoms are frequently frustrating to primary care physicians and utilize medical visits and costs disproportionately. This paper will review the relationship between psychological distress and the decision to seek medical care for common physical symptoms such as fatigue and headache. Evidence will be presented demonstrating that an increasing number of medically unexplained symptoms over a patient's lifetime correlate linearly with the number of anxiety and depressive disorders experienced, the score on the personality dimension of neuroticism, and the degree of functional impairment. Several scales measuring somatization and hypochondriasis are recommended for primary care and medical specialty patients.

Comorbidity↗

PubMed1997

Functional status in coronary artery disease: a one-year prospective study of the role of anxiety and depression.

PURPOSE: Although coronary disease is the second most common cause of work and functional disability, little is known about the relative contributions of biomedical and psychosocial factors to this disability. This study was conducted to determine the associations of depression and anxiety with self-reported physical function and activity interference in patients with coronary artery disease. METHODS: This was a 1-year prospective cohort study of 198 HMO members who had elective cardiac catheterization for coronary artery disease in 1992. Measures included: severity of coronary artery stenosis from cardiac catheterization reports; anxiety and depression severity using interviewer-administered Hamilton Anxiety and Depression Rating Scales; and self-reported physical function and activity interference. RESULTS: At the time of catheterization, patients' self-reported physical function differed significantly by number of main coronary vessels stenosed >70% (P <0.03), by anxiety quartiles (P = 0.001), and by depression quartiles (P = 0.001). At 1 year, physical function was no longer associated with the number of main coronary vessels stenosed at baseline, but still was significantly associated with baseline anxiety (P <0.001) and depression quartiles (P = 0.01). Moreover, change in physical function scores from baseline to 12 months was associated with baseline anxiety (P <0.001) or depression (P <0.001) quartiles, but not with baseline number of occluded coronaries. Results for activity interference were similar to those for physical function. These associations were largely unchanged when corrected for age, sex, education, social class, medical versus surgical management of CAD, and degree of medical comorbidity. CONCLUSION: Anxiety and depression have a significant and persistent effect on physical function in patients with coronary artery disease. Although current treatment methods appear to neutralize the influence of coronary stenosis on physical function during the year following catheterization, this is not true for anxiety and depression.

Age Factors↗

PubMed1997

Predictors of physician frustration in the care of patients with rheumatological complaints.

Recent studies of the doctor-patient relationship have shown that certain patients are perceived as frustrating or difficult by their doctors; however, little is known about the characteristics of these patients that elicit this dissatisfaction. As part of a larger study of rheumatology clinic patients with fibromyalgia or rheumatoid arthritis (N = 68) we used stepwise multiple regression to select the factors most associated with physician frustration while controlling for the effects of other variables. Variable domains included demographics, psychiatric diagnoses, personality factors, functional disability, disease state, and trauma history. These domains as well as individual variables within these domains were systematically evaluated for their unique contribution to the prediction of physician frustration as measured by the Difficult Doctor-Patient Relationship Questionnaire (DDPRQ). Initial bivariate correlates of physician frustration included marital status, current dysthymia and agoraphobia, lifetime panic disorder and obsessive-compulsive disorder, adult rape and physical abuse, somatization disorder, physical and social disability, the presence of fibromyalgia, as well as neuroticism, illness impact, and perceived loss of control. The best multivariable model for estimating frustration magnitude included somatization disorder, perception of lack of control over illness, and a lifetime history of obsessive-compulsive disorder. These factors explained 48% of the variance in DDPRQ score. Physicians in this study were most frustrated with patients who had ongoing preoccupation with multiple medically unexplained physical symptoms as well as the perception of greater impact and lack of control over their illness. These findings suggest that treatment of somatization in patients with chronic symptoms may decrease physician frustration.

Adult↗