Biomedical subjects

M M Biggs

Publications and source records attributed to M M Biggs.

13 recordsLinked to original sources

PubMed2004

The Inventory of Depressive Symptomatology, Clinician Rating (IDS-C) and Self-Report (IDS-SR), and the Quick Inventory of Depressive Symptomatology, Clinician Rating (QIDS-C) and Self-Report (QIDS-SR) in public sector patients with mood disorders: a psychometric evaluation.

BACKGROUND: The present study provides additional data on the psychometric properties of the 30-item Inventory of Depressive Symptomatology (IDS) and of the recently developed Quick Inventory of Depressive Symptomatology (QIDS), a brief 16-item symptom severity rating scale that was derived from the longer form. Both the IDS and QIDS are available in matched clinician-rated (IDS-C30; QIDS-C16) and self-report (IDS-SR30; QIDS-SR16) formats. METHOD: The patient samples included 544 out-patients with major depressive disorder (MDD) and 402 out-patients with bipolar disorder (BD) drawn from 19 regionally and ethnicically diverse clinics as part of the Texas Medication Algorithm Project (TMAP). Psychometric analyses including sensitivity to change with treatment were conducted. RESULTS: Internal consistencies (Cronbach's alpha) ranged from 0.81 to 0.94 for all four scales (QIDS-C16, QIDS-SR16, IDS-C30 and IDS-SR30) in both MDD and BD patients. Sad mood, involvement, energy, concentration and self-outlook had the highest item-total correlations among patients with MDD and BD across all four scales. QIDS-SR16 and IDS-SR30 total scores were highly correlated among patients with MDD at exit (c = 0.83). QIDS-C16 and IDS-C30 total scores were also highly correlated among patients with MDD (c = 0.82) and patients with BD (c = 0.81). The IDS-SR30, IDS-C30, QIDS-SR16, and QIDS-C16 were equivalently sensitive to symptom change, indicating high concurrent validity for all four scales. High concurrent validity was also documented based on the SF-12 Mental Health Summary score for the population divided in quintiles based on their IDS or QIDS score. CONCLUSION: The QIDS-SR16 and QIDS-C16, as well as the longer 30-item versions, have highly acceptable psychometric properties and are treatment sensitive measures of symptom severity in depression.

Adult↗

PubMed2000

A comparison of alternative assessments of depressive symptom severity: a pilot study.

This study compared the performance of an itemized symptom self-report (Inventory of Depressive Symptomatology - Self-Report; IDS-SR), patient global ratings, and clinician global ratings with an itemized clinician-rated symptom severity measure (Inventory of Depressive Symptomatology - Clinician-Rated; IDS-C) in detecting treatment effects in patients with major depressive disorder (MDD). A total of 28 inpatients (30.8% psychotic) and 34 outpatients (17.9% psychotic) with MDD began treatment that followed the Texas medication algorithm. The clinicians completed the IDS-C and a Physician Global Rating Scale (PhGRS) at each assessment visit, while the patients completed the IDS-SR and a Patient Global Rating Scale (PtGRS). Change scores from the baseline to subsequent weeks were computed for all subjects, utilizing all four measures. The IDS-SR was a significant independent predictor of the response to treatment as compared to the two global ratings. The IDS-SR was as sensitive to change as the IDS-C. While the clinician-rated itemized symptom severity rating scale remains the standard to assess the symptomatic outcome of the treatment of MDD, a self-report of identical symptomatology may be a reasonable alternative for many patients.

Adult↗

PubMed2000

A comparison of alternative assessments of depressive symptom severity: a pilot study.

Adult↗

PubMed1999

Medication treatment for the severely and persistently mentally ill: the Texas Medication Algorithm Project.

This article provides an overview of the issues involved in developing, using, and evaluating specific medication guidelines for patients with psychiatric disorders. The potential advantages and disadvantages, as well as the essential elements in the structure of algorithms, are illustrated by experience to date with the Texas Medication Algorithm Project, a public-academic collaboration. Phase 1 entailed assembling research findings on the efficacy of medications for schizophrenic, bipolar, and major depressive disorders. This knowledge was evaluated for its quality and relevance, integrated with expert clinical judgment as well as input by practicing clinicians, family advocates, and patients. Phase 1 (the design and development of the algorithms) was followed by a feasibility test (Phase 2). Phase 3 is an ongoing evaluation comparing the clinical and economic effects of using specific medication guidelines (algorithms) versus treatment as usual in public sector patients with severe and persistent mental illnesses.

Algorithms↗

PubMed1994

Insulin withholding for weight control in women with diabetes.

OBJECTIVE: To provide a description of the clinical characteristics that distinguish individuals who withhold insulin for weight control from those who do not. Some individuals with insulin-dependent diabetes mellitus (IDDM) control their weight by withholding insulin and purging excessive calories. This process places patients at risk for developing severe hyperglycemia, diabetic ketoacidosis, and increases the risk of long-term complications of diabetes. RESEARCH DESIGN AND METHODS: Forty-two women with IDDM, ages 16-40, were interviewed and divided into two groups: insulin withholders (IWs) and non-insulin withholders (non-IWs). These groups were compared on physiological, behavioral, psychological, and psychiatric variables. RESULTS: Compared with non-IWs, patients who withheld insulin to control their weight exhibited poorer glycemic control, reported more negative attitudes toward diabetes, were more likely to have pathological scores on the Eating Disorder Inventory 2, and were more likely to report current or past symptoms of anorexia or bulimia nervosa. IWs were also more likely to report lying to physicians about their degree of compliance with their diabetes regimens. CONCLUSIONS: The results of this study indicated that IWs exhibit more symptoms associated with the spectrum of eating disorders than non-IWs. This study showed that insulin withholding for weight control not only exists, but is associated with some maladaptive symptoms and behaviors that need to be addressed by diabetes treatment teams.

Adolescent↗

PubMed1993

Prospective assessment of electroencephalographic sleep in remitted major depression.

We studied 29 patients with major depression before treatment and then followed these patients prospectively with monthly electroencephalographic (EEG) sleep assessments after successful treatment. Most EEG sleep measures demonstrated no change from the episode throughout a prolonged period of clinical remission. When there was evidence of a change in EEG sleep measures, the effect was modest and due to only a small subset of patients. These findings contribute to the accumulating evidence that selected EEG sleep measures appear to be trait-like and may be useful in identifying individuals at risk for major depression.

Adult↗

PubMed1990

Risk factors in unipolar depression: II. Relation between proband REM latency and cognitions of relatives.

In an ongoing study of risk factors for depression in first-degree relatives of unipolar depressed probands, we have assessed cognitive variables (beliefs, attributional style, and moment-to-moment thinking) in relatives of reduced REM (rapid eye movement) latency unipolar probands, nonreduced REM latency unipolar probands, and normal control probands. Relatives of reduced REM latency probands had more negative cognitions; the effect of REM latency of the proband was independent of the effect of a personal history of depression in the relative. It appears that both biological and psychological factors can be identified as predictors for lifetime rates of depression and may be useful in identifying high-risk individuals.

Adult↗

PubMed1989

Polysomnographic parameters in first-degree relatives of unipolar probands.

We present polysomnographic data for psychiatrically asymptomatic first-degree relatives of unipolar depressed probands. Relatives were classified by proband rapid eye movement (REM) latency (reduced/nonreduced) and by personal REM latency (reduced/nonreduced). Reduced REM latency relatives, whether defined by the proband or by their own REM latency, had polysomnographic alterations consistent with those found in depressed patients, although none of these relatives was depressed at assessment. Reduced REM latency relatives with a history of unipolar depression were compared to reduced REM latency relatives with no history of depression. Virtually no polysomnographic differences were found. Polysomnographic alterations may be stable antecedents of the onset of depression.

Adult↗

PubMed1989

Clinical predictors of recurrence in depression.

In a longitudinal study of 30 successfully treated unipolar depressed patients, the authors evaluated number of depressive episodes, early onset of depression, and lifetime prevalence of affective disorders other than major depression as risk factors for recurrence. Early onset of depression (before age 20) and a history of affective disorders other than major depression were each significantly associated with recurrence. Number of episodes was not as powerful in predicting recurrence as either early onset or lifetime prevalence of other affective disorders.

Actuarial Analysis↗

PubMedDate not supplied

Long-term effects of unipolar depression on cognitions.

As part of an ongoing study of risk factors for unipolar depression in a high-risk group, we have evaluated cognitive variables documented to be abnormal during an episode of depression in adult first-degree relatives of unipolar depressed probands. Asymptomatic relatives with a history of unipolar depression were compared with relatives who had never been depressed. Despite an extended period of recovery (approximately 8 years), relatives with a history of unipolar depression had more negative moment-to-moment thinking, more dysfunctional attitudes, and were more likely to attribute failure to themselves than relatives with no depression. These findings support the hypothesis that unipolar depression is associated with long-term changes in selected cognitive functioning.

Adult↗

PubMedDate not supplied

Secondary depression: a comparison among subtypes.

Forty-five patients who met Research Diagnostic Criteria (RDC) for secondary depression were assessed by St. Louis criteria, and by demographic, illness history, REM latency and dexamethasone suppression test measures. Fully one-third of the RDC secondary sample met St. Louis criteria for primary depression; only age at onset and length of illness discriminated St. Louis primary from secondary depression. RDC depressed patients secondary to alcoholism were compared to those secondary to nonsubstance abuse disorders (excluding schizophrenia). The subgroup with a history of alcoholism reported less severe depression and were preponderantly male. Neither dexamethasone response nor REM latency differentiated the RDC secondary subtypes. Little support was found to validate separation of the RDC secondary subtypes studied.

Adult↗

PubMedDate not supplied

Risk factors in families of unipolar depression. I. Psychiatric illness and reduced REM latency.

In this report, we present data documenting the incidence of reduced REM latency and the lifetime prevalence of psychiatric illness in the parents and siblings of early onset unipolar depressed probands. The prevalence of psychiatric illness (49.3%), especially affective disorders (34.3%), was very high among these relatives. Reduced REM latency in the family members of reduced REM latency probands showed a concordance rate of 70.6% regardless of psychiatric history. The relative risk for unipolar depression among relatives with reduced REM latency was almost three times greater than for relatives with nonreduced REM latency.

Adult↗

PubMedDate not supplied

Secular trend in unipolar depression: a hypothesis.

To address the observation of a secular trend in the incidence of major depression, we have evaluated prevalence of unipolar depression in first-degree relatives of unipolar depressed probands, all of whom were studied in the sleep laboratory. A threshold value of reduced (less than or equal to 65.0 min) or non-reduced (greater than 65.0 min) REM latency was used to define groups for both parents and siblings. Unipolar depression occurred at the same rate in both reduced REM latency siblings (57.1%) and parents (66.7%). Siblings with non-reduced REM latency had a higher rate of depression (36.8%) than non-reduced REM latency parents (0.0%). Implications for biological and environmental factors associated with liability for unipolar depression are discussed.

Adult↗