Biomedical subjects

Charles Given

Publications and source records attributed to Charles Given.

8 recordsLinked to original sources

PubMed2006

Longitudinal analysis of censored medical cost data.

This paper applies the inverse probability weighted (IPW) least-squares method to estimate the effects of treatment on total medical cost, subject to censoring, in a panel-data setting. IPW pooled ordinary-least squares (POLS) and IPW random effects (RE) models are used. Because total medical cost might not be independent of survival time under administrative censoring, unweighted POLS and RE cannot be used with censored data, to assess the effects of certain explanatory variables. Even under the violation of this independency, IPW estimation gives consistent asymptotic normal coefficients with easily computable standard errors. A traditional and robust form of the Hausman test can be used to compare weighted and unweighted least squares estimators. The methods are applied to a sample of 201 Medicare beneficiaries diagnosed with lung cancer between 1994 and 1997.

Aged↗

PubMed2006

Testing the effects of treatment complications on a cognitive-behavioral intervention for reducing symptom severity.

Patients (n = 231) diagnosed with solid tumors and undergoing chemotherapy were randomly assigned to the experimental arm (n = 114) or to conventional care (n = 117). A symptom severity index based on summed severity scores across 15 symptoms was the primary outcome. Building on previously published work, an analysis was undertaken to determine the effects of patient characteristics and treatment complications on reductions in symptom severity achieved by a trial of a cognitive-behavioral intervention (CBI). The impact of the intervention on symptom severity differed by the occurrence of neutropenic events, chemotherapy dose delays or dose reductions, and number of comorbid conditions. Patients with more comorbid conditions, as well as those who did not experience neutropenia or dose delay/reduction, who received the intervention reported lower severity at 20 weeks compared to those who received conventional care. This research begins to specify the clinical conditions under which CBIs are effective in lowering symptom severity.

Aged↗

PubMed2005

Reducing symptom limitations: a cognitive behavioral intervention randomized trial.

Until now, little research has been conducted examining the reactive dimension, or the degree to which a symptom limits an individual's life, in a multiplicity of symptoms. This research examines how problem-solving therapy organizes an intervention to decrease symptom limitations. The purpose was threefold: to determine if a cognitive behavioral intervention decreases the impact of symptom limitations among individuals newly diagnosed with cancer, who are receiving chemotherapy; to determine, after adjusting for covariates, how symptom limitations change over time; and to describe which symptoms are most limiting. This randomized control trial was conducted in two comprehensive and four community cancer centers. Two hundred thirty-seven individuals, aged 31-87, newly diagnosed with solid tumor cancers, participated. The experimental group (118 individuals) received a 10-contact, 18-week cognitive behavioral intervention focused on cancer- and chemotherapy-related symptoms. The control group (119 individuals) received conventional care. Interviews occurred at baseline, 10, 20, and 32 weeks. Data analysis used a two-level hierarchical linear model. Participants receiving the cognitive behavioral intervention had lower scores of symptom limitation than did participants in the control group. At the onset of the study, younger patients reported more symptom limitations than their older counterparts; however, this was reversed by the end of the study. The cognitive behavioral intervention was key to decreasing symptom limitations. Findings also suggest that nursing interventions may be particularly helpful to younger individuals in managing cancer-related symptom limitations.

Adult↗

PubMed2004

Burden and depression among caregivers of patients with cancer at the end of life.

PURPOSE/OBJECTIVES: To examine the patient and family caregiver variables that predicted caregiver burden and depression for family caregivers of patients with cancer at the end of life. DESIGN: A prospective, longitudinal study was implemented with an inception cohort of patients and their family caregivers who were followed after the diagnosis and treatment of cancer. SETTING: Community oncology sites in the midwestern United States. SAMPLE: 152 family caregivers of patients with cancer who died during the course of the study. METHODS: Telephone interviews were conducted with patients at 6-8, 12-16, 24-30, and 52 weeks following diagnoses. In addition, patient medical records and state death certificates were reviewed. MAIN RESEARCH VARIABLES: Effect of caregiver age, gender, education, relationship to the patient, employment status, reports of patient symptoms, patient cancer type, stage of cancer, time from the patient's diagnosis to death, caregiver burden, and depression. FINDINGS: Caregivers aged 45-54 reported the highest levels of depressive symptoms, and caregivers aged 35-44 reported the strongest sense of abandonment. Caregivers who were the adult children of patients with cancer and those who were employed reported high levels of depressive symptoms. Feeling abandoned (a portion of caregiver burden) was more prevalent in female, nonspouse, and adult children caregivers, and adult children caregivers of patients with early-stage cancer and patients with multiple symptoms reported a high perception of disruption in their schedule because of providing care. Caregivers whose patients died early following diagnosis reported the highest depressive symptoms, burden, and impact on schedule. CONCLUSIONS: Caregivers reported levels of depression at thresholds for screening of clinical depression. The number of patient symptoms was related to levels of caregiver depressive symptoms. An association also was found between depression and employment status. Caregiver distress was not dependent on demands of care. IMPLICATIONS FOR NURSING: Very little research exists that prospectively analyzes family caregiver experiences of burden and depression when providing end-of-life cancer care for a family member. Interventions aimed at decreasing caregiver depressive symptoms should be targeted to caregivers who are middle-aged, adult children, and employed. Interventions aimed at decreasing the burden associated with feeling abandoned and having schedules disrupted while providing care should be targeted to caregivers who are female, nonspouse, and adult children, and caregivers of patients with early-stage cancer and multiple symptoms.

Adult↗

PubMed2004

Effect of a cognitive behavioral intervention on reducing symptom severity during chemotherapy.

PURPOSE: To describe a randomized trial of a cognitive behavioral intervention on reducing symptom severity among patients diagnosed with solid tumors and undergoing a first course of chemotherapy and to determine whether the intervention had an additive or interactive effect on symptom severity in the presence of supportive care medications. PATIENTS AND METHODS: Patients (N = 237) were accrued from comprehensive and community cancer centers, interviewed, and randomly assigned to either the experimental intervention (n = 118) or conventional care (n = 119). A symptom severity index, based on summed severity scores across 15 symptoms, was the primary outcome. Each patient's site of cancer, stage at diagnosis, chemotherapy protocols, and use of supportive medications were learned from medical records. RESULTS: Groups were equivalent at baseline, and attrition by characteristics by group was not different. The proportion of patients not receiving chemotherapy at 10 and 20 weeks did not differ by group. At the 10- and 20-week observations, there was a significant interaction between the experimental group and baseline symptom severity. Patients in the experimental group who entered the trial with higher symptom severity reported significantly lower severity at 10 and 20 weeks. Controlling for chemotherapy treatment status at follow-up and supportive care medications did not alter the effect of the experimental intervention. CONCLUSION: Compared with conventional care alone, the experimental intervention was effective among patients who entered the trial with higher levels of symptom severity. Age, sex, site or stage of cancer, and supportive medications did not modify the effect of this cognitive behavioral intervention on symptom severity.

Adult↗

PubMed2004

Does a symptom management intervention affect depression among cancer patients: results from a clinical trial.

Cancer patients diagnosed with solid tumors and undergoing a first course of chemotherapy were randomized to either conventional care or a 10 contact 20 week cognitive behavioral intervention designed to reduce emotional distress. Three hypotheses were tested. First, a test for a group effect found that patients in the intervention who entered the trial with higher symptom severity reported significantly lower depression at 10 but not 20 weeks. Patients in the experimental group who entered with higher depression were more depressed at 10 weeks than patients in the control group. The second hypothesis compared the intervention in two sub-indices of symptom severity; one comprised of symptoms with a depressive component, the other of symptoms not associated with depression. The intervention was more effective in lowering depression at 10 weeks through an interaction with the non-depressive symptom sub-index. At 20 weeks, a significant main effect for the intervention on depression was observed. No interaction with either sub-index was observed. The third hypothesis found no main or interaction effect between psychotropic drugs and the intervention. In conclusion, behavioral interventions may influence depression differently over time. Initially, the intervention lowered depression through certain symptoms and only later did it effect depression directly. Symptoms with an affective component are relatively unaffected by the intervention which was independent of the presence of psychotropic medications.

Adult↗

PubMed2004

Caregivers of persons with a brain tumor: a conceptual model.

Researchers have documented negative physical and emotional consequences for both family caregivers of persons with cancer as well as caregivers of persons with a neurologic disorder. However, there is a unique subset of caregivers who must provide care for someone who may suffer from both a short, terminal trajectory of disease, as well as neurological and neuropsychiatric sequelae - the caregiver of a person with a primary malignant brain tumor. The purpose of this article was to describe a conceptual framework for providing care for a person with a primary malignant brain tumor. The demands of this particular care situation are described, as well as potential resources available to the caregiver to meet those demands. Finally, the stress response that results from the balance between care demands and caregiver resources is illustrated. Development of a conceptual framework for this caregiving population is the first step in assisting nurses to identify factors that place caregivers of persons with a primary malignant brain tumor at risk for negative consequences, and to design interventions to improve caregiver health.

Activities of Daily Living↗

PubMedDate not supplied

Physical functioning: effect of behavioral intervention for symptoms among individuals with cancer.

BACKGROUND: Individuals with cancer receiving chemotherapy suffer deterioration in physical functioning due to symptoms arising from the cancer disease process and its treatment. OBJECTIVES: To determine if age, chronic health conditions (comorbidity), stage of cancer, depressive symptomatology, symptom limitations, sex, and site of cancer moderate the effects of cognitive behavioral intervention on physical function and to determine if symptom limitations mediate the effect of the intervention on physical functioning. METHODS: Two hundred thirty-seven individuals with solid tumor cancer (118 experimental and 119 control group) participated in this 10-contact, 18-week randomized control trial. Cognitive behavioral theory guided the nurse-delivered problem-solving experimental intervention. The control group received conventional care. Interviews occurred at baseline and 10, 20, and 32 weeks. RESULTS: Women with breast cancer had significantly better physical functioning than women with lung cancer. Chronic health conditions, symptom limitation, and depressive symptomatology at baseline were found to moderate the effect of intervention on physical function. Symptom limitation, however, was not found to mediate the effect of intervention on physical functioning. DISCUSSION: The intervention was shown to affect physical function trajectories differently for individuals with different personal and health characteristics. Because poor physical functioning is strongly associated with mortality and poor quality of life, this information may be used by health professionals to target interventions to those who might be most responsive.

Activities of Daily Living↗