Biomedical subjects

Knashawn Morales

Publications and source records attributed to Knashawn Morales.

4 recordsLinked to original sources

PubMed2006

Simvastatin causes changes in affective processes in elderly volunteers.

OBJECTIVES: To test for simvastatin-induced changes in affect and affective processes in elderly volunteers. DESIGN: Randomized, clinical trial. SETTING: The Geriatric Behavioral Psychopharmacology Laboratory at the University of Pennsylvania. PARTICIPANTS: Eighty older volunteers, average age 70, with high normal/mildly elevated serum cholesterol. INTERVENTION: Simvastatin up to 20 mg/d or placebo for 15 weeks. MEASUREMENTS: Daily diary records of positive and negative affects and of events and biweekly measures of depressive symptoms. Affect ratings were obtained using the Lawton positive and negative affect scales; independent raters coded the valences of events. RESULTS: Thirty-one of 39 subjects assigned to placebo and 33 of 41 receiving simvastatin completed the study. During biweekly assessments, four subjects on simvastatin and one on placebo experienced depressive symptoms, as manifest by Center for Epidemiological Studies Depression scale scores greater than 16 (exact P=.36). Diary data demonstrated significant effects on affective processes. For positive affect, there was a significant medication-by-time interaction that reflected decreases in positive affect in subjects receiving simvastatin, greatest in those patients whose final total cholesterol levels were below 148 mg/dL. For negative affect, there were significant medication-by-event, and medication-by-event-by-time interactions, reflecting a time-limited increase in the apparent effect of negative events. CONCLUSION: Simvastatin has statistically significant effects on affect and affective processes in elderly volunteers. The decrease in positive affect may be significant clinically and relevant to the quality of life of many patients.

Affect↗

PubMed2005

Improving the use of hospice services in nursing homes: a randomized controlled trial.

CONTEXT: Hospice care may improve the quality of end-of-life care for nursing home residents, but hospice is underutilized by this population, at least in part because physicians are not aware of their patients' preferences. OBJECTIVE: To determine whether it is possible to increase hospice utilization and improve the quality of end-of-life care by identifying residents whose goals and preferences are consistent with hospice care. DESIGN, SETTING, AND PARTICIPANTS: Randomized controlled trial (December 2003-December 2004) of nursing home residents and their surrogate decision makers (N=205) in 3 US nursing homes. INTERVENTION: A structured interview identified residents whose goals for care, treatment preferences, and palliative care needs made them appropriate for hospice care. These residents' physicians were notified and asked to authorize a hospice informational visit. MAIN OUTCOME MEASURES: The primary outcome measures were (1) hospice enrollment within 30 days of the intervention and (2) families' ratings of the quality of care for residents who died during the 6-month follow-up period. RESULTS: Of the 205 residents in the study sample, 107 were randomly assigned to receive the intervention, and 98 received usual care. Intervention residents were more likely than usual care residents to enroll in hospice within 30 days (21/107 [20%] vs 1/98 [1%]; P<.001 [Fisher exact test]) and to enroll in hospice during the follow-up period (27/207 [25%] vs 6/98 [6%]; P<.001). Intervention residents had fewer acute care admissions (mean: 0.28 vs 0.49; P = .04 [Wilcoxon rank sum test]) and spent fewer days in an acute care setting (mean: 1.2 vs 3.0; P = .03 [Wilcoxon rank sum test]). Families of intervention residents rated the resident's care more highly than did families of usual care residents (mean on a scale of 1-5: 4.1 vs 2.5; P = .04 [Wilcoxon rank sum test]). CONCLUSION: A simple communication intervention can increase rates of hospice referrals and families' ratings of end-of-life care and may also decrease utilization of acute care resources.

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PubMed2005

Probing for affective side effects of drugs used in geriatric practice: use of daily diaries to test for effects of metoclopramide and naproxen.

The aim of this study was to develop the use of daily diaries of affects and events as measures of pharmacological effects on affective processes and to apply them to evaluate the possible affective toxicity of metoclopramide and naproxen, two medications commonly used in geriatric practice. In all, 105 adults aged 65 years or older were randomized to receive metoclopramide (up to 40 mg/day), naproxen (up to 1000 mg/day), or placebo under double-blind conditions for a period of 5 weeks. Patients were seen weekly for evaluations of affective and cognitive outcomes as well as safety. In addition, patients kept diaries with daily records of positive and negative affect and reports of significant daily events. Findings included mixed model analyses of drug assignment, time, events, and interactions for both positive affect and days with significant negative affect. Subjects exhibited high levels of adherence in completing daily diaries. Neither the pattern of dropouts nor the weekly assessments demonstrated significant drug effects on mood or affect. However, diary data demonstrated that metoclopramide increased the apparent impact of negative events on both positive and negative affect relative to placebo, and that naproxen increased the apparent impact of positive events on positive affect and, possibly, of negative events on negative affect relative to placebo. The findings confirm the utility of diary methods for studying drug effects on affective processes in normal elderly subjects. They suggest that both metoclopramide and naproxen can affect the associations between daily events and affects. If replicated, they would demonstrate that drug effects can extend beyond the intensity of affect and/or the emergence of full-fledged psychiatric disorders to include moderation of the interactions between daily events and affect.

Affect↗

PubMed2005

Is the palliative performance scale a useful predictor of mortality in a heterogeneous hospice population?

BACKGROUND: Hospices provide care to patients with a wide range of prognoses, and must develop care plans that anticipate each patient's likely illness trajectory. However, the tools available to guide prognostication and care planning in this population have limited data to support their use. For instance, one of the most widely-used prognostic tools, the Palliative Performance Scale (PPS), has been studied primarily in inpatient settings and in patients with cancer. Its prognostic value in a heterogeneous US hospice population is unknown. OBJECTIVE: The goal of this study was to evaluate the prognostic value of the PPS as a predictor of mortality in a heterogeneous hospice population, and to determine whether it performs equally well across diagnoses and sites of care. DESIGN: Prospective cohort study using existing medical records. SETTING/SUBJECTS: This study was conducted at a large community hospice program, and included all patients enrolled in hospice during the study period. MEASUREMENTS: Each patient's PPS score was recorded at the time of enrollment and patients were followed until death or discharge from hospice. RESULTS: A total of 466 patients enrolled in hospice during the study period. The PPS score was a strong independent predictor of mortality (log rank test of Kaplan Meier survival curves p < 0.001). Six-month mortality rates for 3 PPS categories were 96% (for PPS scores 10-20), 89% (for PPS scores 30-40), and 81% (for PPS scores > or =50). Evaluation of interaction terms in Cox proportional hazards models demonstrated a stronger association between PPS score and mortality among nursing home residents and patients with non-cancer diagnoses. Analysis of the area under receiver operating characteristic curves demonstrated strong predictive value overall, with somewhat greater accuracy for nursing home residents and patients with noncancer diagnoses. CONCLUSION: The PPS performs well as a predictor of prognosis in a heterogeneous hospice population, and performs particularly well for nursing home residents and for patients with non-cancer diagnoses. The PPS should be useful in confirming hospice eligibility for reimbursement purposes and in guiding plans for hospice care.

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