Biomedical subjects

David Spiegel

Publications and source records attributed to David Spiegel.

64 records · Page 4Linked to original sources

PubMed2002

Bridging psychology and biology. The analysis of individuals in groups.

Biological systems are particularly prone to variation, and the authors argue that such variation must be regarded as important data in its own right. The authors describe a method in which individual differences are studied within the framework of a general theory of the population as a whole and illustrate how this method can be used to address three types of issues: the nature of the mechanisms that give rise to a specific ability, such as mental imagery; the role of psychological or biological mediators of environmental challenges, such as the biological bases for differences in dispositional mood; and the existence of processes that have nonadditive effects with behavioral and physiological variables, such as factors that modulate the response to stress and its effects on the immune response.

Affect↗

PubMedDate not supplied

Psychosocial intervention for lesbians with primary breast cancer.

This study examined the effects of a Supportive-Expressive group therapy intervention offered to lesbians with early stage breast cancer. Twenty lesbians diagnosed with breast cancer in the previous 12-months were recruited and assessed at baseline, and at 3, 6, and 12 months after the group intervention. During the 12-week intervention, group members focused on the problems of a new diagnosis, coping with the illness and treatment, mood changes, coping responses and self-efficacy, improving relationships with family, friends and physicians, the impact of the illness on life, pain and sleep, and changes in body image and sexuality. A within-subject slopes analysis was conducted on data collected for each woman over the first year. As predicted, women reported reduced emotional distress, intrusiveness, and avoidance, and improved coping. There were significant changes in their social support, but in the unexpected direction. Instrumental support and informational support declined. However, conflict in family relations also declined, while trends were found towards more cohesiveness and expressiveness. Participants reported less pain and better sleep. There were no changes in body image, sexuality, or attitudes toward health-care providers. These results suggest that Supportive/Expressive group intervention appears to be helpful for lesbians with breast cancer.

Adaptation, Psychological↗

PubMedDate not supplied

Sleep disturbances in women with metastatic breast cancer.

We examined sleeping problems in women with metastatic breast cancer in relation to depression, social support, and salivary cortisol. Ninety-seven women with metastatic breast cancer were drawn from a larger study on the effects of group therapy on quality of life and survival. This study is based on the baseline assessments conducted prior to randomization into treatment conditions. Sleep, depression symptoms, and social support were assessed by self-reporting. Cortisol was assessed from saliva samples taken over a 3-day period. Medical status and demographic characteristics were also examined in relation to each sleep variable in multiple regression analysis. Most women (63%) reported one or more types of sleep disturbance and 37% reported using sleeping pills in the previous 30 days. Problems with falling to sleep were significantly related to greater pain and depressive symptoms. Problems of waking during the night were significantly associated with greater depression and less education. Problems in waking/getting up were significantly associated with greater depressive symptoms and less social support. Sleepiness during the day was not significantly related to the variables in the regression model. Fewer hours of sleep were significantly associated with metastases to the bone, higher depressive symptoms, and more social support. Women who reported sleeping 9 or more hours per night, compared to those who reported a moderate amount of sleep (6.5-8.5 hours), had significantly lower 9 p.m. cortisol levels. Use of sleeping pills was more frequent among women reporting greater pain and depressive symptoms. These results suggest that women with metastatic breast cancer who are at higher risk for having sleeping problems are those who are less educated, in pain, depressed, have bony metastases, or lack social support.

Adult↗

PubMedDate not supplied

Psychological distress and pain significantly increase before death in metastatic breast cancer patients.

OBJECTIVE: This study was designed to examine the course of psychological distress and pain from study entry to death in 59 women with metastatic breast cancer participating in a randomized trial of the effects of group psychotherapy on psychosocial outcomes and survival. It was hypothesized that psychological distress would increase significantly before death independent of changes in pain. METHOD: Data were collected as part of a larger study (N = 125). Analyses were based on data from a subset of women who had died and for whom we had data from at least three assessments. Mean levels of mood, trauma symptoms, depression symptoms, well-being, and pain over three time points were examined: at baseline (T1), the second-to-last assessment before death (T2), and the last assessment before death (T3). RESULTS: Results indicate that while psychological distress remained relatively constant or declined from T1 to T2, means on all measures significantly changed in the hypothesized direction from T2 to T3. Neither self-reported pain, nor the passage of time, appeared to account for these changes. Additionally, participation in group psychotherapy did not have a significant impact on this change in distress proximal to death. CONCLUSIONS: Results suggest that specialized end-stage clinical interventions are particularly needed for cancer patients as they approach death. Moreover, intervention studies for patients with deteriorating illnesses may need to take this "spike" in psychological distress and pain proximal to death into account to avoid Type II errors in evaluations of psychological outcomes.

Adult↗

PubMedDate not supplied

Psychophysiological and cortisol responses to psychological stress in depressed and nondepressed older men and women with elevated cardiovascular disease risk.

OBJECTIVE: The objective of this study was to compare psychophysiological and cortisol reactions to psychological stress in older depressed and nondepressed patients at risk for cardiovascular disease (CVD). METHODS: Forty-eight depressed participants and 20 controls with elevated cardiovascular risk factors underwent a psychological stress test during which cardiovascular variables were measured. Salivary cortisol was collected after each test segment. Traditional (e.g., lipids) and atypical (e.g., C-reactive protein) CVD risk factors were also obtained. RESULTS: At baseline, the groups did not differ on lipid levels, flow-mediated vasodilation, body mass index, or asymmetric dimethylarginine. However, the depressed patients had significantly higher C-reactive protein levels. Contrary to our hypothesis, there were no differences in baseline cortisol levels or diurnal cortisol slopes, but depressed patients showed significantly lower cortisol levels during the stress test (p = .03) and less cortisol response to stress. Compared with nondepressed subjects, depressed subjects also showed lower levels of respiratory sinus arrhythmia (RSA(TF)) during the stress test (p = .02). CONCLUSIONS: In this sample, older depressed subjects with elevated risk for CVD exhibited a hypocortisol response to acute stress. This impaired cortisol response might contribute to chronic inflammation (as reflected in the elevated C-reactive proteins in depressed patients) and in other ways increase CVD risk. The reduced RSA(TF) activity may also increase CVD risk in depressed patients through impaired autonomic nervous system response to cardiophysiological demands.

Age Factors↗

PubMedDate not supplied

Depression and stress reactivity in metastatic breast cancer.

OBJECTIVE: Cancer-related distress due to the psychological and physical challenges of metastatic breast cancer (MBC) may result in symptoms of depression, which negatively affects quality and may influence quantity of life. This study investigated how depression affects MBC stress reactivity, including autonomic (ANS) and hypothalamic-pituitary-adrenal (HPA) axis function. METHOD: Forty-five nondepressed and 45 depressed patients with MBC underwent a modified Trier Social Stress Test (TSST) while affect, cardiovascular, respiratory, and cortisol responses were measured. RESULTS: At study entry, depressed compared with nondepressed patients had significantly lower log cortisol waking rise levels (p = .005) but no other HPA differences. Positive affect (p = .025) and high-frequency heart-rate variability (lnHF) (p = .002) were significantly lower at TSST baseline in depressed patients. In response to the TSST, depressed patients reported significantly lower positive (p = .050) and greater negative affect (p = .037) and had significantly reduced lnHF (p = .031). In secondary analyses, at TSST baseline both low-frequency (lnLF) (p = .002) and very-low-frequency (lnVLF) (p = .0001) heart rate variability were significantly lower in the depressed group. In secondary analyses during the TSST, those who were depressed had significantly lower lnVLF (p = .008) and did not increase aortic impedance reactivity as much as did the nondepressed during the stressor (p = .005). CONCLUSION: Depression in patients with MBC was associated with alterations in autonomic regulation, particularly reductions in respiratory sinus arrhythmia, a measure of cardiac vagal control, at baseline and during the TSST. In addition, depression was associated with blunted HPA response to awakening. Both MBC groups had relative cortisol hyporesponsiveness to acute stress.

Adrenal Cortex↗

PubMedDate not supplied

Cytotoxic T lymphocyte count and survival time in women with metastatic breast cancer.

While prognostic factors in early stage breast cancer are well documented, few studies have examined predictors of the rate of metastatic progression. The purpose of this study was to examine cytotoxic T-cell lymphocyte (CTL) count as a marker of disease status in women with metastatic breast cancer. This study examined CTL subset counts as predictors of subsequent survival in 113 women with metastatic or recurrent breast cancer. Samples were measured by flow cytometry using monoclonal antibodies for cell surface antigens for percentages and absolute numbers of CTLs (CD3/CD8), total lymphocytes, T cells (CD3), helper T cells (CD3/CD4), and total white blood cell (TWC) count. Higher CTL counts emerged as a significant predictor of longer survival up to 7 years later (Wald = 7.40, p = 0.007; Cox regression model). The relationship of higher CTL count with enhanced survival was independent of the effects of medical treatment. CTLs were significantly associated with TWC count (r = 0.42, p < 0.001). However, TWC count was not associated with subsequent survival time. Higher CTL count was associated with Karnofsky performance status (r = 0.27, p = 0.004). However, after adjustment for the Karnofsky score, the CTL count/survival relationship remained significant (Wald = 4.33, p = 0.038). In conclusion, there is a robust relationship between CTL count and survival that is independent of the effects of medical treatments, TWC count, and Karnofsky performance status. Moreover, a reduced CTL count may be a mediator or marker of more rapid disease progression in metastatic breast cancer.

Adult↗

PubMedDate not supplied

Disengagement and social support moderate distress among women with a family history of breast cancer.

Using a cross-sectional, exploratory design, this pilot study analyzed the relationships between familial history of breast cancer and psychological distress in order to evaluate who is more distressed and to assess the possible need for intervention. Coping style, social support, and family relations were investigated as potential moderators of these relationships. Participants were 45 women with a familial history of breast cancer recruited from the Family Registry for Breast Cancer (FRBC) at the Northern California Cancer Center (NCCC). Contrary to previous reports of similar cohorts, the overall level of psychological distress in this cohort was comparable to normative samples. The number of relatives with breast cancer was related to distress as measured by the State-Trait Anxiety Inventory (STAI) scale, but there was no significant differentiation in distress associated with the number of first-degree as compared to second- and third-degree relatives with breast cancer. Having more relatives that had died from breast cancer was associated with greater distress on a number of measures. The number of first-degree relative deaths, including maternal death, was also associated with distress. Positive and network support, disengagement coping responses, and family cohesion were each significant moderators of the impact of family history on distress. This association between distress and disengagement is similar to that found in metastatic breast cancer patients themselves, and the findings suggest a subgroup that merits and might respond to more intensive intervention to provide support and facilitate emotional expression.

Adaptation, Psychological↗

PubMedDate not supplied

Relationship of functional quality of life to strategies for coping with the stress of living with HIV/AIDS.

The authors examined factors associated with four dimensions of functional quality of life (physical functioning, energy/fatigue, social functioning, and role functioning) in 142 men and women living with HIV/AIDS. Participants completed the Brief COPE inventory and the Medical Outcomes Study Health Survey, with HIV-relevant items added. Greater use of maladaptive coping strategies was associated with lower levels of energy and social functioning. Pain severe enough to interfere with daily living tasks was associated with a lower level of functional quality of life on all four quality of life dimensions. Interventions aimed at developing adaptive coping strategies and improving pain management may improve functional aspects of quality of life in persons living with HIV/AIDS.

Acquired Immunodeficiency Syndrome↗

PubMedDate not supplied

Alternative therapies: a common practice among men and women living with HIV.

This study examined the prevalence and factors associated with alternative therapy use in an ethnically diverse, gender-balanced sample of persons living with HIV/AIDS. More than two thirds (67%) of the participants who were taking HIV-related medications were also taking an alternative supplement. Half of the sample (50%) reported that they took one or more multivitamins, 17% reported using mineral supplements, 12% reported using Chinese herbs, and 12% reported using botanicals. Substantial proportions of the sample also reported using acupuncture (31%), massage (23%), and meditation (28%) to specifically treat HIV-related symptoms. Women were four times more likely to use alternative therapies than men. Also, Caucasians were nearly four times more likely to use alternative treatments compared to other ethnic groups. The results of this study indicate a strong need to assess individual patients' use of alternative treatment approaches as well as to further investigate their efficacy among HIV-positive patients.

Adult↗