Validation and utility of the patient health questionnaire in diagnosing mental disorders in 1003 general hospital Spanish inpatients

The association of depression and anxiety with obesity and unhealthy behaviors among community-dwelling US adults

OBJECTIVE

The aim of this study was to examine the extent to which depression and anxiety are associated with smoking, obesity, physical inactivity and alcohol consumption in the US population using the Patient Health Questionnaire 8 (PHQ-8) and two questions on lifetime diagnosis of anxiety and depression.

METHODS

Data were analyzed in 38 states, the District of Columbia and two territories using the 2006 Behavioral Risk Factor Surveillance System (n=217,379), a large state-based telephone survey.

RESULTS

Overall, adults with current depression or a lifetime diagnosis of depression or anxiety were significantly more likely than those without each diagnosis to smoke, to be obese, to be physically inactive, to binge drink and drink heavily. There was a dose-response relationship between depression severity and the prevalence of smoking, obesity and physical inactivity and between history of depression (never depressed, previously depressed, currently depressed) and the prevalence of smoking, obesity, physical inactivity, binge drinking and heavy drinking. Lifetime diagnosis of depression and anxiety had an additive association with smoking prevalence.

CONCLUSION

The associations between depression, anxiety, obesity and unhealthy behaviors among US adults suggest the need for a multidimensional and integrative approach to health care.

The patient health questionnaire, Japanese version: validity according to the mini-international neuropsychiatric interview-plus

To validate the Japanese version of the Patient Health Questionnaire against the Mini-International Neuropsychiatric Interview-Plus in Japan 131 patients in 4 primary care settings and 2 general hospital settings participated. These patients completed the Patient Health Questionnaire and returned it to their physician within 48 hr. Subsequently, the subjects underwent a diagnostic evaluation interview based on the Mini-International Neuropsychiatric Interview-Plus by an interviewer blind to the results of the Patient Health Questionnaire screening. The Patient Health Questionnaire diagnosis was characterized using kappa values between 0.70 and 1.0 for Somatoform Disorder, Major Depressive Disorder, Panic Disorder, Bulimia Nervosa, Alcohol Abuse/Dependence, and Premenstrual Disorder. Sensitivities, specificities, and negative predictive values were very good (between 0.84 and 1.0) for the first 4 diagnoses but not Alcohol Abuse/Dependence or Premenstrual Disorder, as were the Positive predictive values (between 0.78 and 1.0). Findings show very good concordance of the Japanese version of the Patient Health Questionnaire with the Japanese version of the Mini-International Neuropsychiatric Interview-Plus.

De novo depression and anxiety disorders and influence on adherence during peginterferon-alpha-2a and ribavirin treatment in patients with hepatitis C

BACKGROUND

Depression and anxiety have been associated with interferon treatment and low treatment adherence.

AIM

To study the incidence and associated risk factors of depressive and anxiety disorders during pegylated interferon plus ribavirin and treatment adherence in a prospective cohort of 176 patients with chronic hepatitis C patients.

METHODS

Patients were interviewed at baseline using the Structured Clinical Interview for DSM-IV Mental Disorders and the Patient Health Questionnaire and the Hospital Anxiety and Depression Scale were completed. Both questionnaires were completed also after 4, 12 and 24 weeks of treatment.

RESULTS

De novo depressive and/or anxiety disorders were diagnosed in 53 (36%) patients, in whom antidepressants and/or anxiolytics were administered. Higher baseline depression-subscale score (OR = 27.8, 95% CI = 2.82-333), primary education level (OR = 3.1, 95% CI = 1.40-7.03) and being an immigrant (OR = 3.2, 95% CI = 1.12-9.47) were predictors of psychiatric disorders during anti-viral therapy. The percentage of patients with good adherence was lower in those with depression and/or anxiety (79% vs. 90%, P < 0.04). Only one patient (1%) discontinued treatment because of a major depressive episode. Depression and/or anxiety disorders had no effect on attainment of sustained virological response.

CONCLUSION

Early detection and treatment of depressive and anxiety disorders favours good adherence to anti-viral treatment in hepatitis C.

Does clinical depression affect the accuracy of self-reported height and weight in obese women?

OBJECTIVE

Recent research from a self-report survey showed a strong association between obesity and clinical depression in women. The present analysis assessed whether differential bias in self-reports of height and weight as a function of depression influences the apparent strength of the association.

METHODS

Accuracy of self-reported height and weight was assessed in 250 obese (mean BMI=38.7 kg/m(2)) women, 135 of whom met the American Psychiatric Association DSM-IV diagnostic criteria for clinical depression.

RESULTS

Depressed and non-depressed women underreported their weight by 1.5 and 1.2 kg, respectively. They underreported their height by 0.002 and 0.003 m, respectively.

DISCUSSION

Bias in self-reports of body weight and height is similar in depressed and non-depressed obese women. The underreporting of weight in both groups is similar in magnitude to that seen in normal weight women. Thus, using self-reports of height and weight seems unlikely to bias estimates of the association between obesity and clinical depression in women.

Association between obesity and depression in middle-aged women

OBJECTIVE

Evaluate the association between obesity and depression among middle-aged women.

METHODS

A total of 4641 female health plan enrollees aged 40-65 years completed a structured telephone interview including self-reported height and weight, the Patient Health Questionnaire (PHQ) assessment of depression; a brief measure of rate was 62%.

RESULTS

Prevalence of moderate or severe depression increased from 6.5% among those with body mass index (BMI) under 25 to 25.9% among those with BMI over 35. Prevalence of obesity increased from 25.4% among those with no depressive symptoms to 57.8% among those with moderate to severe depression. Independent of obesity, depression was associated with significant reductions in frequency of moderate (4.6 vs. 5.4 times per week) or vigorous (2.8 vs. 3.7 times per week) physical activity. Depression was associated with significantly higher daily caloric intake (1831 vs. 1543) among those with BMI over 30.

CONCLUSIONS

Among middle-aged women, depression is strongly and consistently associated with obesity, lower physical activity and (among the obese) higher caloric intake. Public health approaches to reducing the burden of obesity or depression must consider the strong association between these two common conditions.

Validation of the Spanish-language version of the chronic illness resources survey

This article describes the reliability and validity of the Spanish-language version of the Chronic Illness Resources Survey (CIRS-Spanish), an instrument used to tailor and evaluate behaviorally focused chronic disease self-management interventions. Forty Spanish-speaking adults with 1 or more chronic conditions completed the CIRSSpanish on 2 occasions, separated by 2 weeks. They also completed a series of 5 other measures to evaluate criterion, convergent validity, and divergent validity. The 22-item CIRS-Spanish demonstrated reasonable levels of reliability and validity similar to the previously validated English-language version and was easily understood by patients. The CIRS-Spanish is a reliable and valid instrument for measurement of multilevel support for chronic illness management in low-income, Spanish-speaking patients with a variety of chronic conditions.

Screening for depression in medical settings with the Patient Health Questionnaire (PHQ): a diagnostic meta-analysis

OBJECTIVE

To summarize the psychometric properties of the PHQ2 and PHQ9 as screening instruments for depression.

INTERVENTIONS

We identified 17 validation studies conducted in primary care; medical outpatients; and specialist medical services (cardiology, gynecology, stroke, dermatology, head injury, and otolaryngology). Electronic databases from 1994 to February 2007 (MEDLINE, PsycLIT, EMBASE, CINAHL, Cochrane registers) plus study reference lists have been used for this study. Translations included US English, Dutch, Italian, Spanish, German and Arabic). Summary sensitivity, specificity, likelihood and diagnostic odds ratios (OR) against a gold standard (DSM-IV) Major Depressive Disorder (MDD) were calculated for each study. We used random effects bivariate meta-analysis at recommended cut points to produce summary receiver-operator characteristic (sROC) curves. We explored heterogeneity with metaregression.

MEASUREMENTS AND MAIN RESULTS

Fourteen studies (5,026 participants) validated the PHQ9 against MDD: sensitivity = 0.80 (95% CI 0.71-0.87); specificity = 0.92 (95% CI 0.88-0.95); positive likelihood ratio = 10.12 (95% CI 6.52-15.67); negative likelihood ratio = 0.22 (0.15 to 0.32). There was substantial heterogeneity (Diagnostic Odds Ratio heterogeneity I2 = 82%), which was not explained by study setting (primary care versus general hospital); method of scoring (cutoff > or = 10 versus "diagnostic algorithm"); or study quality (blinded versus unblinded). The diagnostic validity of the PHQ2 was only validated in 3 studies and showed wide variability in sensitivity.

CONCLUSIONS

The PHQ9 is acceptable, and as good as longer clinician-administered instruments in a range of settings, countries, and populations. More research is needed to validate the PHQ2 to see if its diagnostic properties approach those of the PHQ9.

Case identification in psychiatric epidemiology: a review

BACKGROUND

Psychiatric epidemiologic surveys since 1980 have relied heavily on a small number of survey diagnostic instruments for case ascertainment, which encode reports of respondents to highly structured interview questions delivered by interviewers without clinical training. Many validations of these survey diagnostic instruments have been carried out.

OBJECTIVE

This paper reviews the success of the survey diagnostic instruments, for eight diagnostic categories, in validations with a psychiatrist examination as the gold standard.

METHOD

Public databases were searched for potentially relevant publications, of which more than 1000 were located. Tables show sensitivity, specificity, Kappa, sample source and size, survey instrument and validation method.

RESULTS

The number of validation studies relevant to the eight disorders ranged from 8 for schizophrenia to 29 for major depressive disorder. Reported sensitivities ranged from zero to 100%, and specificities from 22% to 100%.

CONCLUSION

Results for common mental disorders such as major depressive disorder, alcohol disorder, drug disorder, and agoraphobic disorder are better than for panic disorder, obsessive compulsive disorder, bipolar disorder, and schizophrenia. The validity of case ascertainment in psychiatric epidemiology is still in question.

Diagnostic accuracy of the mood module of the Patient Health Questionnaire: a systematic review

OBJECTIVE

The nine-item mood module of the Patient Health Questionnaire (PHQ-9) was developed to screen and to diagnose patients in primary care with depressive disorders. We systematically reviewed the psychometric literature on the PHQ-9 and performed a meta-analysis to ascertain its summary sensitivity and specificity.

METHODS

EMBASE, PubMed and PsycINFO were used to search literature up to July 2006. Studies were included if (1) they investigated the diagnostic accuracy of the PHQ-9 and (2) the PHQ-9 had been compared with a reference test. The quality of the studies was appraised using the Quality Assessment of Diagnostic Accuracy Studies. We calculated sensitivity, specificity and confidence intervals for each included study. We used the random effects model to calculate the summary sensitivity and specificity.

RESULTS

We found a sensitivity of 0.77 (0.71-0.84) and a specificity of 0.94 (0.90-0.97) for the PHQ-9. The positive predictive value in an unselected primary care population was 59%, which increased to 85-90% when the prior probability increased to 30-40%.

CONCLUSION

In primary care, the PHQ-9 is a valid diagnostic tool if used in selected subgroups of patients with a high prevalence of depressive disorder.

Depression and disability in seasonal and migrant Hispanic agricultural workers

OBJECTIVE

To examine the relationship between depression and disability in seasonal and migrant Hispanic agricultural workers.

METHODS

A total of 315 adult Hispanic agricultural workers living in northwest farmworker housing were interviewed to diagnose major and minor depression and assess disability. Statistical analysis determined demographic and clinical factors significantly related to a diagnosis of depression and examined the association between depression and disability.

RESULTS

The rate of major depression was 3.2% (n=10) and of minor depression, 6.3% (n=20). The sole demographic factor significantly associated with depression was female gender (P<.02). Controlling for gender, regression analysis demonstrated increased disability in those diagnosed with major and/or minor depression (P<.001). Those diagnosed with depression had a significantly higher mean total disability score [20.6 (95% CI 16.8-24.4) vs. 6.8 (95% CI 5.6-8.0)] than those without such diagnosis. Nondepressed subjects were significantly more likely (39% vs. 3%) to be completely free of functional impairment than those with depression (P<.001).

CONCLUSIONS

This study confirms the known association between depression and disability and extends it to the seasonal and migrant Hispanic farmworker population. The severity of disability found in the depressed group was such that it could affect performance of agricultural work compared with that found in the nondepressed group.

Help-seeking and access to mental health care in a university student population

BACKGROUND

University students represent an important population in which to study access to mental health care. Understanding their unmet needs will enhance efforts to prevent and treat mental disorders during a pivotal period in life.

OBJECTIVE

To quantify mental health service use and estimate how various factors are associated with help-seeking and access in a university student population.

DESIGN

A Web-based survey was administered to a random sample of 2785 students attending a large, public university with a demographic profile similar to the national student population. Nonresponse bias was accounted for using administrative data and a nonrespondent survey.

MEASURES

Mental health was measured using the Patient Health Questionnaire screens for depressive and anxiety disorders. Mental health service utilization was measured as having received psychotropic medication or psychotherapy in the past year.

RESULTS

Of students with positive screens for depression or anxiety, the proportion who did not receive any services ranged from 37% to 84%, depending on the disorder. Predictors of not receiving services included a lack of perceived need, being unaware of services or insurance coverage, skepticism about treatment effectiveness, low socioeconomic background, and being Asian or Pacific Islander.

CONCLUSIONS

Even in an environment with universal access to free short-term psychotherapy and basic health services, most students with apparent mental disorders did not receive treatment. Initiatives to improve access to mental health care for students have the potential to produce substantial benefits in terms of mental health and related outcomes.

Relation of body mass index to depression and weighing frequency in overweight women

OBJECTIVE

Research suggests that overweight and obesity are associated with depressive symptoms, particularly among women. Evidence from weight control trials suggests that higher weighing frequency is associated with greater weight loss or less weight gain. As limited data exist on the effects of self-weighing on body mass index (BMI) among overweight adults with or without depression, this study seeks to examine this issue using data from a population-based epidemiologic survey.

METHODS

Data from a large population-based survey of 4655 women ages 40-65 in the greater Seattle area, surveyed from November 2003 to February 2005, were used to examine associations of depression and weight self-monitoring with BMI. Sample-weighted regression models were used to examine associations of depression, self-weighing frequency, and BMI, with demographic factors (race/ethnicity, employment status, smoking status, age, martial status, educational attainment) entered as covariates.

RESULTS

Regression models indicated that higher self-weighing frequency and negative depression status were independently associated with lower BMI, with no interaction observed between depression and self-weighing.

CONCLUSION

Frequent self-weighing appears to be associated with lower BMI in both depressed and non-depressed overweight women.

Swahili translation and validation of the Patient Health Questionnaire-9 depression scale in the Kenyan head and neck cancer patient population

BACKGROUND

Depression is an important predictor of post therapy quality of life (QOL) in head and neck (H&N) cancer patients. In addition, depression rates may vary among cultures.

OBJECTIVE

As part of a larger cross cultural study on post therapy QOL differences in H&N cancer patients, the goal of this project was to translate a well-validated English language depression scale into Swahili, and then validate this scale in Kenyan H&N cancer patients. METHODS, SETTINGS AND SUBJECTS: In Part 1 of the study, we translated the Patient Health Questionnaire-9 (PHQ-9) into Swahili, adhering to established International Quality of Life Association (IQOLA) guidelines. In Part 2, we psychometrically validated the newly translated scale using a prospective study of 48 patients at the Kenyatta National Hospital ENT clinic in Nairobi, Kenya.

RESULTS

The Swahili PHQ-9 had good test retest reliability (Intraclass correlation coefficient, 0.71) and internal consistency (Cronbach's alpha = 0.80). It also had good construct validity, as scores correlated strongly with TNM stage (Chi square = 123, p < 0.05), and with the compositeand global scores of an H&N cancer specific QOL scale (UW-QOL, r = -0.87, p < 0.05).

CONCLUSION

The Swahili version of the PHQ-9 is a reliable scale in Kenyan H&N cancer patients, and is a valuable tool in screening for and monitoring of depression as a function of QOL in this population.

Criterion validity of the French version of Patient Health Questionnaire (PHQ) in a hospital department of internal medicine

OBJECTIVES

Depressive disorders are overrepresented among the patients admitted to non-psychiatric units in general hospitals. However, the majority of depressed patients fail to be identified within this care setting. Since a self-administered questionnaire (Patient Health Questionnaire, PHQ-9) has given encouraging results in English and Spanish, new research should test its criterion validity in a French-speaking environment.

DESIGN

The study included 292 patients admitted to the internal medicine units of the University Hospitals of Geneva. Each patient filled the PHQ-9; 212 patients also underwent a blinded DSM-IV diagnostic assessment by a psychiatrist.

METHODS

In order to assess the validity of PHQ-9 against the gold standard of the psychiatrist's DSM-IV diagnosis, we calculated overall accuracy, sensitivity, specificity, positive predictive value and Cohen kappa coefficients. We also studied the relationship between the PHQ-9 diagnostic and the severity of depression. Finally, analysis focused on the presence of a diagnosis of depression.

RESULTS

Within the framework of the study, PHQ-9 showed an acceptable level of specificity. However, its sensitivity in detecting major depression was low (about 50% of false-negative results). As regards the overall presence of depressive disorders, this instrument performed hardly any better (35% of false negatives). Other characteristics of the population under investigation may have affected the data.

CONCLUSIONS

The French version of PHQ-9 demonstrated low sensitivity as compared with psychiatrist-established diagnosis of DSM-IV A criterion and major depressive episode.

Prevalence and treatment of depression in a hospital department of internal medicine

BACKGROUND

Depressive disorders are overrepresented among patients admitted to nonpsychiatric units of general hospitals, but the majority of depressed patients are not identified in this setting. Effective and well-tolerated treatments and reliable diagnostic criteria, together with new assessment tools (self-administered or not), have been developed with encouraging results. Nevertheless, few studies have utilized standardized instruments and extensive clinical interviews by well-trained psychiatrists to assess depression. New research should test these tools in a French-speaking environment.

METHODS

The investigation covered 292 patients aged 18-65 who were admitted over a period of 6 months to the internal medicine units of Geneva University Hospitals. Each patient filled in a self-administered questionnaire for depression [Patient Health Questionnaire (PHQ-9)]; 212 patients were also evaluated by a psychiatrist using DSM-IV diagnostic assessment and the Hamilton Depression Rating Scale during the first week of their hospital stay; both assessments were single-blinded.

RESULTS

Psychiatric clinical interviews identified a high proportion (26.9%) of depressive disorders (37% among women) for all diagnoses; 11.3% (17.3% among women) of the patients met the DSM-IV criteria for major depression. The PHQ-9 identified depressive disorders among 34.9% of patients (42% among women) and identified a major depressive syndrome among 18.4% of patients (29.6% among women). Physicians in the internal medicine unit identified only about half the depressive patients; at the time of psychiatric examination, fewer than one in four patients was receiving antidepressant therapy.

CONCLUSIONS

Our findings confirm the results of previous investigations, which showed that the failure to detect and treat depression is a major health problem among patients admitted to nonpsychiatric units of a general hospital.

The 5-HTTLPR s/s genotype at the serotonin transporter gene (SLC6A4) increases the risk for depression in a large cohort of primary care attendees: the PREDICT-gene study

Previous reports and meta-analyses have yielded inconclusive results as to whether the s/s genotype at the 5-HTTLPR serotonin transporter polymorphism confers increased risk for depression. We tested the association between s/s genotype and depression in a large cohort (n = 737) of Spanish primary care consecutive attendees participating in a European study on predictors for depression in primary care (PREDICT study). Participants were administered the Composite International Diagnostic Interview (CIDI) depression subscale allowing diagnoses using ICD-10 criteria for depressive episodes. Participants were genotyped to establish 5HTTLPR genotype. Both univariable and multivariable associations between the s/s genotype and depression were tested twice using two different depressive outcomes (ICD-10 depressive episode and ICD-10 severe depressive episode). We found an association between the s/s genotype and both depressive outcomes that was independent of age, sex, family history of psychological problems among first degree relatives and presence of comorbid generalized anxiety disorder. When comparing s/s homozygous versus the rest, the adjusted odds ratio for any ICD-10 depressive episode and for severe ICD-10 depressive episode were 1.50 (95% CI: 1.0-2.2; P = 0.045) and 1.79 (95% CI: 1.1-2.8; P = 0.016), respectively. The association was significantly stronger with increasing severity of depression (chi2 for linear association=6.1; P = 0.013) suggesting a dose-dependent relationship. Our results are consistent with previous reports suggesting a small but independent effect by the s/s 5-HTTLPR genotype increasing the risk for depression.

Conceptual models of treatment in depressed Hispanic patients

PURPOSE

Though patient variables are likely to play an important role in the undertreatment of depression, little is known of patients' perceptions of standard depression treatments. In an effort to understand their perspective, we investigated depressed Hispanic patients' perceptions of primary care treatments and the specific benefits associated with them.

METHODS

We undertook semistructured interviews with 121 depressed Hispanic medical patients waiting for their appointments. We developed and implemented a coding scheme using standard iterative procedures.

RESULTS

More than one half of the patients viewed physician consultation and medication as helpful. Almost all patients considered psychotherapy to be helpful. Supportive talk was the most commonly mentioned specific benefit of physician consultation. The most common benefit of medication was its anxiolytic, sedative effect; energizing effects were less common. The most common benefits associated with psychotherapy included support, advice, and catharsis. Patients currently taking medication for depression had a more favorable view of pharmacological treatment; differences by language of interview were noted.

CONCLUSIONS

Patients' perceptions of the specific efficacies of depression treatment did not match priorities implicit in current treatment guidelines. Such perceptions may play a key role in shaping patients' decisions to initiate and maintain treatment.

Validity of the patient health questionnaire (PHQ-9) as a screening tool for depression amongst Nigerian university students

BACKGROUND

The common self-rated depression scales are lengthy, old and do not reflect the current diagnostic classifications criteria of depressive disorders. This study aimed to validate the Patient Health Questionnaire (PHQ-9) as a screening tool for depression amongst Nigerian university students.

METHODS

A representative sample of university students (n=512) completed the PHQ-9 and the Beck's Depressive Inventory (BDI). They were also interviewed for clinical diagnoses of depressive disorders using the Mini International Neuropsychiatric Interview (MINI).

RESULTS

The internal consistency of questions within the PHQ-9 was 0.85. The PHQ-9 had good concurrent validity with the BDI (r=0.67, P<0.001). It also had a good (r=0.894, P<0.001) one month test-retest reliability. Using the Receiver Operating Characteristic (ROC) curve, the optimal cut-off score for minor depressive disorder is 5 (sensitivity 0.897, specificity 0.989, Positive Predictive Value - PPV 0.875, Negative Predictive Value - NPV 0.981 and Overall Correct Classification - OCC rate 0.973) while for major depressive disorder only is 10 (sensitivity 0.846, specificity 0.994, PPV 0.750, NPV 0.996 and OCC rate 0.992).

LIMITATIONS

The study limitations include use of a specific group in community, moderate sample size and screening for only minor and major depressive disorders while neglecting other depressive disorders.

CONCLUSIONS

The PHQ-9 has good psychometric properties amongst Nigerian university students. Because of its validity, reliability, brevity and ease of administration, the PHQ-9 will be a valuable tool for estimating depression amongst college students in Nigerian community. More studies are needed to test the usefulness of the translated local language versions of this instrument amongst the community in sub-Saharan Africa.

Responsiveness of the PHQ-9 to Psychopharmacological Depression Treatment

This is the first study that investigates the responsiveness of the Patient Health Questionnaire-9 (PHQ-9), a standard 9-item self-report depression scale, to antidepressant medication. Authors analyzed data from 1,788 depressed outpatients (66.8% women; mean age, 50.3 years), participating in a prospective, open-label, non-interventional, observational study of sertraline. On the 0-27-point PHQ-9 scale, the total sample gained 10.3 points at 12 weeks, corresponding to a standardized effect size of -1.85. With reference to two independent criterion standards, the PHQ-9 change scores were considerably greater in therapy responders than in nonresponders. The PHQ-9 was equally responsive in men and women. Therefore, the PHQ-9 qualifies as a practical tool for gauging response to pharmacological treatment in depressed patients.

Validity of the Brief Patient Health Questionnaire Mood Scale (PHQ-9) in the general population

OBJECTIVE

The aim of this study was to assess the validity of the Patient Health Questionnaire depression module (PHQ-9). It has been subject to studies in medical settings, but its validity as a screening for depression in the general population is unknown.

METHOD

A representative population sample (2,066 subjects, 14-93 years) filled in the PHQ-9 for diagnosis [major depressive disorder, other depressive disorder, depression screen-positive (DS+) and depression screen-negative (DS-)] and other measures for distress (GHQ-12), depression (Brief-BDI) and subjective health perception (EuroQOL; SF-36).

RESULTS

A prevalence rate of 9.2% of a current PHQ depressive disorder (major depression 3.8%, subthreshold other depressive disorder 5.4%) was identified. The two depression groups had higher Brief-BDI and GHQ-12 scores, and reported lower health status (EuroQOL) and health-related quality of life (SF-36) than did the DS- group (P's < .001). Strong associations between PHQ-9 depression severity and convergent variables were found (with BDI r = .73, with GHQ-12 r = .59).

CONCLUSION

The results support the construct validity of the PHQ depression scale, which seems to be a useful tool to recognize not only major depression but also subthreshold depressive disorder in the general population.

Psychiatric disorders and asthma outcomes among high-risk inner-city patients

OBJECTIVE

The purpose of this study was to examine the rate of psychiatric disorders among patients attending an ethnically diverse, inner-city asthma clinic for an initial visit and assess the association between psychiatric disorders and asthma morbidity.

METHODS

A semistructured psychological interview was conducted to assess for psychiatric diagnoses. A pulmonary physician, who was blind to psychiatric disorder, established diagnosis of asthma based on national guidelines.

RESULTS

Sixty-four percent of 85 participants received at least 1 psychiatric diagnosis. The pulmonary physician rated patients with a psychiatric disorder as achieving fewer goals (M = 2.3 +/- 1.3) for asthma control than patients without a psychiatric disorder (M = 3.6 +/- 1.5, p = .0002). Patients with a psychiatric diagnosis more frequently reported an emergency room visit for asthma during the past 6 months (OR = 4.89; 95% CI, 1.76-13.39) and greater use of short-acting beta2-agonist medication (M = 1.5 +/- 0.9 canisters per month) than patients without a psychiatric diagnosis (M = 0.9 +/- 0.8, p = .003). These findings were independent of demographics, health insurance, and asthma severity. No differences emerged between patients with and without a mental disorder on percent predicted FEV1. Patients with a psychiatric disorder reported a higher severity level for asthma symptoms than the severity level indicated by their pulmonary function in comparison to patients without a psychiatric diagnosis (OR = 3.52; 95% CI, 1.23-10.10). Health insurance appeared to be a confounding factor in this relationship.

CONCLUSION

A high rate of psychiatric disorders was found among inner-city asthma patients. Psychiatric diagnoses were associated with greater perceived impairment from asthma but not objective measurement of pulmonary function.

Diabetes complications and depression as predictors of health service costs

OBJECTIVE

The aim of this study was to assess the relative contributions of diabetes complications, depression and comorbid medical disorders to health service costs in adults with diabetes.

METHODS

A total of 4398 adult health plan members with diabetes completed a mailed survey. Depression was assessed using the nine-item PHQ. Health service costs, diabetes complications, glycohemoglobin levels and comorbid medical conditions were assessed using computerized health plan records.

RESULTS

Total health service costs were approximately 70% higher for individuals with major depression than for those without any depressive disorder (5361 US dollars over 6 months vs. 3120 US dollars, P<.001); this difference was consistent across all categories of health service costs. Diabetes complications were the strongest predictor of total costs (6845 US dollars for those with three or more complications vs. 1719 US dollars for those with none), but depression remained strongly associated with increased costs at all levels of diabetes severity.

CONCLUSIONS

Among people with diabetes, depression is associated with 50-75% increases in health service costs. This proportional difference is similar to that in general population samples, but the absolute dollar difference is much greater. The effect of depression on health service use is undoubtedly complex and not limited to unexplained physical symptoms among the worried well.

Screening for Depressive Disorders in Patients with Skin Diseases: A Comparison of Three Screeners

Despite being common, depression often goes undetected in patients with skin diseases. Our aim was to examine and compare the performance of three depression screeners. We studied dermatological inpatients aged 18-65 years. They completed the questionnaires Primary Care Screener for Affective Disorders (PC-SAD), Patient Health Questionnaire (PHQ) and General Health Questionnaire (GHQ-12) and were administered a standardized psychiatric interview (SCID-I) by a mental health professional, who was unaware of the questionnaire answers. The analysis was performed on 141 patients with complete data (79% of all eligible patients, 89% of all patients who agreed to participate). The prevalence of the main forms of depression, major depressive disorder and dysthymic disorder, was 8.4% and 6.3%, respectively. For major depressive disorder, the sensitivity and specificity of the questionnaires were as follows: PC-SAD, 73% and 88%; PHQ, 55% and 91%; GHQ-12, 73% and 78%. For dysthymic disorder, the sensitivity and specificity were as follows: PC-SAD, 56% and 95%; PHQ, 44% and 90%; GHQ-12, 56% and 76%. The small sample size suggests caution in drawing conclusions about the relative merits of these screeners. Although both the GHQ and the PHQ are short and easily hand scored, the first is a generic screener for psychiatric morbidity that is not specific for depression, while the second displayed modest sensitivity. The PC-SAD, with short average administration time, acceptable sensitivity and high specificity, might be particularly useful in settings where the technology for computer automated scoring is available. Although screening programmes might be useful, they should be supplemented by quality improvement programmes and by the development of consultation-liaison services.

Assessing depression in primary care with the PHQ-9: can it be carried out over the telephone?

BACKGROUND

Telephone assessment of depression for research purposes is increasingly being used. The Patient Health Questionnaire 9-item depression module (PHQ-9) is a well-validated, brief, self-reported, diagnostic, and severity measure of depression designed for use in primary care (PC). To our knowledge, there are no available data regarding its validity when administered over the telephone.

OBJECTIVE

The aims of the present study were to evaluate agreement between self-administered and telephone-administered PHQ-9, to investigate possible systematic bias, and to evaluate the internal consistency of the telephone-administered PHQ-9.

METHODS

Three hundred and forty-six participants from two PC centers were assessed twice with the PHQ-9. Participants were divided into 4 groups according to administration procedure order and administration procedure of the PHQ-9: Self-administered/Telephone-administered; Telephone-administered/Self-administered; Telephone-administered/Telephone-administered; and Self-administered/Self-administered. The first 2 groups served for analyzing the procedural validity of telephone-administered PHQ-9. The last 2 allowed a test-retest reliability analysis of both self- and telephone-administered PHQ-9. Intraclass correlation coefficient (ICC) and weighted kappa (for each item) were calculated as measures of concordance. Additionally, Pearson's correlation coefficient, Student's t-test, and Cronbach's alpha were analyzed.

RESULTS

Intraclass correlation coefficient and weighted kappa between both administration procedures were excellent, revealing a strong concordance between telephone- and self-administered PHQ-9. A small and clinically nonsignificant tendency was observed toward lower scores for the telephone-administered PHQ-9. The internal consistency of the telephone-administered PHQ-9 was high and close to the self-administered one.

CONCLUSIONS

Telephone and in-person assessments by means of the PHQ-9 yield similar results. Thus, telephone administration of the PHQ-9 seems to be a reliable procedure for assessing depression in PC.

Depression and glycemic control in Hispanic primary care patients with diabetes

CONTEXT

Maintaining optimal glycemic control is an important goal of therapy in patients with diabetes mellitus. Patients of Hispanic ancestry have been shown to have high rates of diabetes and poor glycemic control (PGC). Although depression is common in adults with diabetes, its relationship to glycemic control remains unclear, especially among Hispanics.

OBJECTIVE

To assess the association of depression with PGC in Hispanics.

DESIGN

Data from a cross-sectional mental health survey in primary care were crosslinked to the hospital's computerized laboratory database.

SETTING

Urban general medicine practice at a teaching hospital.

PATIENTS

Two hundred and nine patients (mean [standard deviation] age, 57.1 [10.3] years; 68% females) with recent International Classification of Diseases, Ninth Revision (ICD-9) codes for diabetes mellitus, and 1 or more hemoglobin A(1c) (HbA(1c)) tests.

MAIN OUTCOME MEASURE

Probability of PGC (HbA(1c)>or=8%).

RESULTS

Probability for PGC steadily increased with severity of depression. Thirty-nine (55.7%) of the 70 patients with major depression had HbA(1c)>or=8%, compared with 39/92 (42.4%) in the minimal to mild depression group, and 15/47 (31.9%) in the no depression group (P(trend)=.01; adjusted odds ratio, 3.27; 95% confidence interval, 1.23 to 8.64, for moderate or severe depression vs no depression). Only 29 (41.4%) of the patients with major depression received mental health treatment in the previous year.

CONCLUSIONS

In this primary care sample of Hispanic patients with diabetes, we found a significant association between increasing depression severity and PGC. Yet, less than one half of the patients with moderate or severe depression received mental health treatment in the previous year. Improving identification and treatment of depression in this high-risk population might have favorable effects on diabetic outcomes.

Social workers' experiences of the world trade center disaster: stressors and their relationship to symptom types

The study describes New York area social workers' experiences of nine different stressors on 9/11. It also examines their reports of working with clients within the 6 months after 9/11. These variables are then analyzed for their relationship with symptomology 6 months after 9/11. Proximity to the WTC on 9/11, knowing someone who was a primary victim, and talking with clients about events related to 9/11 were all related to symptom levels; however, these experiences differentially impacted levels of depressive, anxiety, and somatic symptoms. Sex and race differences were found among the variables.

Base rates for panic and depression according to the Brief Patient Health Questionnaire: a population-based study

BACKGROUND

Recently published studies analyzing sensitivity and specificity scores have demonstrated that the brief version of the Patient Health Questionnaire (PHQ [J. Am. Med. Assoc. 282 (1999) 1734]) is a useful tool for the detection of panic disorder and depression.

METHODS

We aimed to get normative data for the brief PHQ in a representative population-based sample. Sociodemographic data and PHQ data from 2066 subjects were included.

RESULTS

Base rates for PHQ criteria of major depression were 3.8% with the typical 1:2 ratio between males and females (frequency of minor depressive forms: 9.2%). Normative data for the depression total scores were reported. Marital status, education and family income were significantly associated with depression, even after controlling for age and sex. For panic disorder, base rates were 1.8%; age, gender, and marital status were significant predictors. Frequency for panic attacks as a less restrictively defined version were 4.5%.

CONCLUSIONS

The normative data provide a framework for the interpretation of depression and panic scores of the PHQ.

Screening psychischer Störungen mit dem “Gesundheitsfragebogen für Patienten (PHQ-D)“

Zusammenfassung. Ziel dieser Studie ist die Validierung der deutschen Version des “Patient Health Questionnaire (PHQ-D)“. Der PHQ wurde zum praktikablen Screening psychischer Störungen für die Primärmedizin entwickelt und erfasst direkt die diagnostischen Kriterien des DSM-IV. N = 357 allgemeinmedizinische/internistische Patienten und N = 171 psychosomatische Patienten wurden mit dem PHQ-D und dem Strukturierten Klinischen Interview für DSM-IV (SKID-I) untersucht, wobei das SKID-I als diagnostischer Goldstandard diente. Ärzte und Patienten wurden zur Akzeptanz des PHQ-D befragt. Eine ausgezeichnete Kriteriumsvalidität des PHQ-D zeigte sich insbesondere bei der Diagnose der Major Depression, wo die Sensitivität für die medizinische Stichprobe bei 95% und die Spezifität bei 86% lag. Gute teststatistische Werte ergaben sich u.a. auch für die Panikstörung. Die Anwendung des PHQ-D wurde von jeweils mehr als 90% der Patienten und Ärzte gut akzeptiert. Mit dem PHQ-D liegt ein praktikables, valides und gut akzeptiertes Instrument zur Anwendung in Forschung und klinischer Praxis vor. Sein Einsatz kann zur verbesserten Versorgung psychischer Störungen beitragen.

Epidemiology of binge eating disorder

OBJECTIVE

First described over 50 years ago, binge eating disorder (BED) only recently has become the focus of epidemiologic studies. This article provides a comprehensive review of these studies.

METHOD

Relevant studies were examined and summarized in the form of a narrative review.

RESULTS

Similar to the early studies of bulimia nervosa (BN), the first generation of epidemiologic studies of BED is limited in scope or methodology. They focus on prevalence rates and provide only basic demographic characteristics and often use less than optimal sampling or assessment methods.

DISCUSSION

Results suggest that the demographic profile of BED may be more diverse than that of BN. Future studies should evaluate complex etiologic models in representative samples that include men and a broader range of ethnic minority groups.

Detecting panic disorder in medical and psychosomatic outpatients: comparative validation of the Hospital Anxiety and Depression Scale, the Patient Health Questionnaire, a screening question, and physicians' diagnosis

OBJECTIVES

To compare the validity of detecting panic disorder using the Hospital Anxiety and Depression Scale (HADS), the Patient Health Questionnaire (PHQ), a screening question, and physicians' diagnosis, and to test whether modified evaluation algorithms improve the operating characteristics of these questionnaires. Additionally, patient and physician acceptability of the screening questionnaires was investigated.

METHODS

The total sample of 499 patients comprised 348 medical outpatients and 151 psychosomatic outpatients. The Structured Clinical Interview for DSM-IV (SCID) was the criterion standard for the presence of a panic disorder. Sensitivity, specificity, predictive values, and overall accuracy were compared for the different measures. The conditional test characteristics were calculated based on the observed prevalence of panic disorder in the medical and psychosomatic subsample, respectively.

RESULTS

Panic disorder was diagnosed in 4.3% of the medical outpatients and in 19.2% of the psychosomatic outpatients. The HADS, PHQ, and screening question achieved good operating characteristics. In contrast, physicians detected only 15% of cases with panic disorder. Modified evaluation algorithms of the questionnaires lead to an improvement of test characteristics. Of all measures, the PHQ had the best operating characteristics. The use of screening questionnaires was accepted by 96% of the patients and 97% of the physicians.

CONCLUSIONS

The questionnaires as well as the screening question performed well in detecting panic disorder. Thus, the integration of these highly accepted measures into clinical evaluation is suggested. Recommendations for the selection of specific evaluation algorithms are given.

Anxiety and mood disorders in otorhinolaryngology outpatients presenting with dizziness: validation of the self-administered PRIME-MD Patient Health Questionnaire and epidemiology

The aims of the study were to: 1) assess the validity of the mood and anxiety modules of the PRIME-MD Patient Health Questionnaire (PHQ) in otorhinolaryngology outpatients consulting with dizziness; and, 2) the prevalence of anxiety and mood disorders in these patients and in 3 subgroups based on of the cause of dizziness (Functional group, with psychogenic or hyperventilation factor; Organic group with an organic cause; Unspecified group without indication of organic or psychogenic cause). The PRIME-MD PHQ was completed by 268 consecutive outpatients. In 97 patients a psychiatric interview was performed. Operating characteristics indicated good criterion validity for the assessed modules of the PRIME-MD PHQ. Thirty five percent of the patients were diagnosed with "Any Anxiety or Depressive Disorder". In the Functional group, the prevalence of "Any Anxiety or Depressive Disorder" was significantly higher than in the Organic group (P<.0001) and than in the Unspecified group (P<.0001). In the Unspecified group, the prevalence of "Any Anxiety or Depressive Disorder" was significantly lower than in the Organic group (P =.007). Our findings support the criterion validity of the PRIME-MD PHQ for anxiety and depressive disorders in otorhinolaryngology outpatients with dizziness. Psychiatric disorders were highly prevalent and differences in psychiatric status between the different subgroups were demonstrated.