This study explored the relationship between psychological factors (including intrusive thoughts, anxiety, well-being, depressed mood) and poor sleep the night before surgery. Patients (N = 39) scheduled for breast surgery (mean age = 47 years) wore an actiwatch at home the night before surgery to provide an objective indication of sleep duration and sleep efficiency. Participants also completed 3 measures of their psychological experience during the week prior to surgery. In separate regression analyses, intrusive thoughts, anxiety, and emotional well-being were each related to sleep duration the night before surgery, when controlling for age, body mass index, ethnicity, and marital status. No relationships were found between depressed mood, physical or social well-being, and sleep duration. In a multiple regression model that included all significant variables, intrusive thoughts were most strongly associated with sleep duration. Intrusive thoughts were also significantly related to sleep efficiency. Results suggest that patients' intrusions about impending surgery are associated with lower sleep duration and sleep efficiency the night before surgery. Additional research is warranted to explore the implications of these associations for patients, as well as possible interventions to improve sleep in this clinical setting.

Despite the best available clinical care, pain after surgery is a virtually universal patient experience that can have pervasive negative consequences. Given the large variability among patients in postoperative pain levels, research on novel modifiable risk factors is needed. One such factor suggested by recent experimental studies indicates that disruption of even a single night's sleep can increase subsequent pain in healthy volunteers. In this preliminary clinical study, we tested the hypothesis that poor sleep the night before surgery would predict heightened postoperative pain. Patients (n=24) scheduled for routine breast-conserving surgical procedures for the diagnosis or treatment of cancer were recruited and wore an actigraphy device providing objective, validated measures of sleep duration and disruption (low sleep efficiency). Pain severity and interference with daily activities for the week after surgery was assessed with the Brief Pain Inventory. As hypothesized, multiple regression analyses revealed that lower sleep efficiency was a significant predictor of greater pain severity and interference, controlling for age, race, and perioperative analgesics as appropriate. Sleep efficiency was not significantly related to measures of depressed mood, emotional upset, or relaxation assessed on the morning of surgery. Patients with sleep efficiency in the lowest tertile had clinically higher levels of pain (>2 points) compared with patients in the highest sleep efficiency tertile. Sleep duration had no significant effects. This preliminary clinical study supports the possibility that sleep disruption on the night before surgery may increase patients' experience of pain after surgery. Research to investigate the mechanisms underlying these effects and to explore the possible clinical benefits of interventions to improve patients' sleep before surgery is now warranted.

Obesity is associated with an elevated risk of hypertension and cardiovascular disease. The adipocyte hormone leptin, which stimulates energy expenditure in animals by activating the sympathetic nervous system (SNS), is believed to play a role in this association. However, evidence in humans remains sparse. We investigated the relationship between circulating leptin and cardiovascular and inflammatory responses to acute psychological stress in humans. Participants were 32 men and 62 women aged 18-25 years. Cardiovascular activity was assessed using impedance cardiography at baseline, during acute laboratory stress, and during a 45-min recovery period. Plasma cytokines were measured in blood drawn at baseline and 45-min poststress. In women only, baseline plasma leptin was significantly associated with stress-induced changes in heart rate (beta = 0.53, P = 0.006), heart rate variability (HRV) (beta = -0.44, P = 0.015), and cardiac preejection period (PEP) (beta = -0.51, P = 0.004), independent of age, adiposity, and smoking. Women's plasma leptin levels also correlated with stress-induced elevations in the proinflammatory cytokine interleukin-6 (IL-6) (beta = 0.35, P = 0.042). Circulating leptin is an independent predictor of sympathetic cardiovascular activity, parasympathetic withdrawal, and inflammatory responses to stress in women. Because cardiovascular and inflammatory stress responses are predictive of future cardiovascular disease, leptin may be a mechanism mediating the adverse effects of stress and obesity on women's cardiovascular health.

9555 Background: Despite the best clinical care, pain following gynecologic surgery for cancer is a virtually universal patient experience that can have pervasive negative consequences. Given the sometimes prolonged impact of such pain, and the large variability across patients, additional research on modifiable presurgery risk factors is needed. Recent experimental studies have found that sleep disruption may increase pain sensitivity the next day in healthy volunteers. The possible negative effects of poor sleep prior to cancer surgery have not been investigated despite the likelihood that sleep may be particularly disrupted at that time. We hypothesized that sleep before surgery (at a gynecologic oncology practice) would be disrupted compared with healthy women not anticipating surgery. Within the patient group we further hypothesized that disrupted sleep would predict increased postoperative pain. Methods: Sleep disruption (% of time awake in the sleep period) and sleep duration (minutes asleep) were measured in 52 women (15 patients; 38 healthy comparisons) using an actigraph device for 10 nights, commencing 3 nights before surgery. Pain intensity was measured in the patient group using the Brief Pain Inventory 7 days postsurgery. Statistical analyses included univariate analyses of variance and multiple regression. Results: Sleep disruption but not sleep duration, averaged over the three nights before surgery, was significantly greater in the surgery group compared with the healthy comparison group (F=10.0, p=.003). In the patient group increased pain intensity was predicted by heightened sleep disruption (B=−.86, C.I. −.23 to −.099, p=.0001) and lower sleep duration (B=−.48, C.I. −.03 to −.001, p=.033) when controlling for age, surgery duration, presurgery mood and postoperative sleep. Conclusions: This study is the first to document adverse effects of prior sleep disruption and duration on pain in a clinical oncology context. Future research should explore mechanisms responsible for these effects and examine the impact of interventions to improve sleep prior to surgery. No significant financial relationships to disclose.

Acute mental stress tests have helped to clarify the pathways through which psychosocial factors are linked to disease risk. This methodology is now being used to investigate potentially protective psychosocial factors. We investigated whether global self-esteem might buffer cardiovascular and inflammatory responses to acute stress. One hundred and one students completed the Rosenberg Self-Esteem Scale. Heart rate and heart rate variability (HRV) were recorded for 5 min periods at baseline, during two mental stress tasks, (a speech and a color-word task) and 10, 25 and 40 min into a recovery period. Plasma levels of tumor-necrosis factor-α (TNF-α), interleukin-6 (IL-6) and interleukin-1 receptor antagonist (IL-1Ra) were assessed at baseline, immediately post-stress and after 45 min recovery. Repeated measures analysis of variance demonstrated that heart rate levels were lower across all time points in those with high self-esteem, although heart rate reactivity to stress was not related to self-esteem. There were no differences in baseline HRV, TNF-α, IL-6 or IL-1Ra. Multiple linear regressions revealed that greater self-esteem was associated with a smaller reduction in heart rate variability during the speech task, but not the color-word task. Greater self-esteem was associated with smaller TNF-α and IL-1Ra responses immediately following acute stress and smaller IL-1Ra responses at 45 min post-stress. In conclusion, global self-esteem is associated with lower heart rate and attenuated HRV and inflammatory responses to acute stress. These responses could be processes through which self-esteem protects against the development of disease.

9078 Background: Despite the best clinical care, pain following breast cancer surgery is a virtually universal patient experience that can have pervasive negative consequences. Given the sometimes prolonged impact of such pain, and the large variability across patients, additional research on modifiable presurgery risk factors is needed. Recent experimental studies have found that disruption of even a single night's sleep is sufficient to increase pain sensitivity the next day in healthy volunteers. The possible negative effects of poor sleep prior to cancer surgery have not been investigated despite the likelihood that sleep may be particularly disrupted at that time. We hypothesized that sleep disruption the night before outpatient breast cancer surgery would predict increased postsurgery pain. Methods: Pain was measured in 24 female lumpectomy patients using the Brief Pain Inventory 7 days postsurgery. Sleep disruption (% of time awake in the sleep period) was measured using an actigraph device for 10 nights, commencing 3 days before surgery. Statistical analyses included correlation and multiple regression. Results: Sleep disruption was significantly greater the night before surgery than 3 nights before surgery (p=.047). Heightened sleep disruption the night before surgery predicted increased pain intensity and pain interference with daily life (r=-.44, p=.034; r=-.49, p=.015), This relationship remained significant for pain interference even after controlling for age, race, surgery duration, presurgery mood, postoperative sleep disturbance and pain medication (B=-.12, C.I. -.23 to -.02, p=.027). Conclusions: This study is the first to document adverse effects of prior sleep disruption on pain sensitivity in a clinical oncology context. Future research should explore mechanisms responsible for these effects and examine the impact of interventions to improve sleep prior to surgery. No significant financial relationships to disclose.

Heightened cardiovascular stress responsivity is associated with cardiovascular disease, but the origins of heightened responsivity are unclear. The present study investigated whether disturbances in cardiovascular responsivity were evident in individuals with a family history of cardiovascular disease risk. Data were collected from 60 women and 31 men with an average age of 21.4 years. Family history of cardiovascular disease risk was defined by the presence of coronary heart disease, hypertension, diabetes or high cholesterol in participants' parents and grandparents; 75 participants had positive, and 16 had negative family histories. Systolic and diastolic blood pressure (BP), heart rate and heart rate variability were measured continuously for 5 min periods at baseline, during two mental stress tasks (Stroop and speech task) and at 10-15 min, 25-30 min and 40-45 min post-stress. Individuals with a positive family history exhibited significantly greater diastolic BP reactivity and poorer systolic and diastolic BP recovery from the stressors in comparison with family history negative individuals. In addition, female participants with a positive family history had heightened heart rate and heart rate variability reactivity to stressors. These effects were independent of baseline cardiovascular activity, body mass index, waist to hip ratio and smoking status. Family history of hypertension alone was not associated with stress responsivity. The findings indicate that a family history of cardiovascular disease risk influences stress responsivity which may in turn contribute to risk of future cardiovascular disorders. (c) 2006 Elsevier B.V. All rights reserved.

Sleep is important for health; however, poor sleep is a growing problem in many Western societies, particularly among women. Alterations in immune function following poor sleep (defined by duration and disruption) may be linked to ill health. Not yet investigated are the possible effects on stress-induced mobilization of lymphocytes. As natural killer (NK) cells are particularly responsive to acute stress, the present study examined whether sleep period duration and percentage of time awake after sleep onset (WASO) the night before a laboratory stressor would predict reduced NK cell mobilization. Sleep was monitored by actigraphy in 39 healthy women. NK cell peripheral blood numbers were determined at baseline (post-20 min rest), 4 min into a Stroop task, immediately post-task and 30 min after task completion. Participants with high WASO had significantly less NK cell mobilization to the stressor and failed to return to baseline levels after 30 min compared to women with low WASO. No effects were found for sleep period duration. Findings raise the possibility that inadequate NK cell mobilization to, and poor recovery from acute stress may be one pathway by which sleep could impact health.

Objective Dispositional optimism measured with the Life Orientation Test has been associated with a variety of health outcomes. We assessed whether optimism was related to indices of healthy ageing, and if effects were mediated through health behaviours. Method A community sample of 128 men and women aged 65 to 80 years was recruited from general practice lists. Optimism and health behaviours were assessed by questionnaire, and healthy ageing indexed by physical health summary scores from the Short Form 36, and by self-rated health. Results Optimism was associated with not smoking, moderate alcohol consumption, brisk walking, and vigorous physical activities (women only), independently of socio-demographic factors and clinical condition. Physical health status was associated with optimism, independently of socio-demographic factors, clinical condition, negative affectivity, and body mass. This effect was attenuated when health behaviours were taken into account. Self-rated health was also positively related to optimism, and this association was not mediated by health behaviours. Neither the optimism nor pessimism subscales of the Life Orientation Test showed as consistent effects as the full scale. Conclusions We conclude that dispositional optimism is associated with healthy ageing. The relationship between optimism and healthy ageing was only partly mediated by the health behaviours assessed in this sample.

Sleep disruption is a growing problem that may have serious health effects. As stress-induced increases in cortisol are thought to be a key adaptive process it is important to examine how this response is affected by sleep. The current study investigated the association of four sleep parameters (objective/subjectively measured sleep quality and quantity) and subsequent salivary cortisol reactivity (maximal change from baseline) to an experimental stressor in 53 healthy women. Objective actigraphy monitoring and self-report diaries were used to assess sleep. Results revealed that individuals with lower objective sleep quality (wake percentage during sleep) had a blunted response to the experimental stressor. No associations were found between cortisol reactivity and actigraphy-derived sleep quantity, or either of the self-reported sleep variables. Results are discussed with regard to the possible adverse health effects that may result from poor sleep quality and a blunted cortisol response to stress.

Mindfulness training has been shown to improve psychological well-being and physical health. One proposed pathway for the positive effects of mindfulness training is through the development of new emotion regulation strategies, such as the ability to experience emotions by observing and accepting them without judgment. Theoretically, this should facilitate recovery from negative emotional states; however, this has rarely been examined empirically. The goal of the current study was to determine whether mindfulness training is associated with more efficient emotional and cardiovascular recovery from induced negative affect.The current study tested emotional and cardiovascular recovery from induced negative affect during a personal recall task in women randomly assigned to 6-weeks of mindfulness training (n = 39) compared to women assigned to a wait-list control condition (n = 32). During baseline, task, and post-task rest, blood pressure and heart rate were monitored at fixed intervals and heart rate variability (HRV) and pre-ejection period (PEP) were monitored continuously. This study was embedded within a randomized trial that evaluated the effects of mindfulness training in a sample of younger breast cancer survivors, a group in need of access to effective psychosocial intervention as they can experience high stress, anxiety, and physical symptoms for many years in to survivorship.In response to the personal recall task, women in both the intervention and control groups showed significant increases in sadness, anxiety, and anger, with the intervention group reaching higher levels of sadness and anger than controls. Further, the intervention group showed a significantly steeper decline in sadness and anger, as well as steeper initial decline in diastolic blood pressure compared to women in the wait list control condition. Groups did not differ in their self-reported feelings of anxiety, or in blood pressure, heart rate, or pre-ejection period (PEP) responses to the task. The control group demonstrated an increase in heart rate variability (HRV) during the task (indexed by the root mean square of successive differences in heart rate; RMSSD) while the intervention group remained flat throughout the task.Compared to the control group, women in the intervention group experienced greater negative emotions when recalling a difficult experience related to their breast cancer, and demonstrated an efficient emotional and blood pressure recovery from the experience. This suggests that mindfulness training may lead to an enhanced emotional experience coupled with the ability to recovery quickly from negative emotional states.

A heightened cortisol awakening response (CAR) is associated with adiposity in middle-aged men, but the causal significance of this effect is not known. We hypothesised that if disturbance in cortisol secretion is involved in the development of overweight and obesity, then it might be present in normal weight adults at increased risk of obesity on account of parental adiposity. The CAR and cortisol profile over the day were measured in 33 men and 62 women aged 18–25 years. Parental adiposity was assessed with figure ratings derived from the Contour Drawing Rating Scale, and these were correlated with parental self-reported body mass index (BMI) in a subset of participants (r=0.66–0.79). In men, a positive association was observed between the CAR and their judgements of their fathers’ adiposity after controlling for age, smoking status, time of waking, and the participants’ own BMI; the correlation was 0.56 (P=0.008) for the cortisol increase between waking and 30min, and 0.47 (P=0.028) for the cortisol area under the curve. The correlation between the CAR and fathers’ own reported BMI and figures ratings were also significant. The relationship between parental adiposity and the CAR in women was inconsistent, and the associations between the CAR and opposite gender parental adiposity were not significant. Parental adiposity was not related to cortisol output over the rest of the day or to the slope between waking and evening in either sex. The results of this study suggest that disturbances of cortisol secretion may present before the emergence of heightened adiposity in young men at raised risk for obesity.

Socioeconomic inequalities in morbidity and mortality exist, but the psychobiological pathways that link social status and health are less clear. It has previously been reported that socioeconomic status is inversely associated with the magnitude of the cortisol response to awakening (CAR) in men and women of working age. In the present study, we tested whether larger cortisol responses would be present in an older retired population, and whether the CAR differed between men and women. The extent to which adherence to saliva sample timing also affects the CAR was investigated. Ninety three men and women aged 65–80 years took saliva samples on waking, and then 10, 20, 30 and 60min after waking. Subjective social status was assessed using the ‘ladder’ measure devised by Adler et al. (2000). Non-compliance was defined as a reported delay of 10min or more between waking and taking the first saliva sample. Cortisol levels on waking were significantly higher in the non-compliant individuals, and the CAR was blunted compared with that of compliant participants. With non-compliant participants eliminated from the analyses, we found that low social status was associated with a larger CAR after adjusting for gender, waist/hip ratio, body mass index, smoking, time of waking, chronic illness, prescription medication, education and financial strain. No association was found between CAR and education or financial strain. Women also had significantly larger CARs, independent of socioeconomic position. The results highlight the importance of controlling for non-compliance and are consistent with the notion that higher socioeconomic position protects against stress-related activation of psychobiological pathways which may contribute to variation in disease risk evident in old age.

Cognitive decline in old age is not universal or inevitable. Associations have been observed with neuroendocrine function, but the relevance of other physiological processes is unclear. We predicted that impairment of memory in an ageing population would be related to the dysregulation of neuroendocrine and cardiovascular responses. One hundred and thirty-nine participants (65–80 years) were recruited from general practice in London. Two standardised verbal paired-associates recall tasks were administered in order to determine declarative memory performance, and a fluid intelligence task (matrix reasoning) was also performed. Salivary cortisol samples were collected every 10 min, while blood pressure and heart rate were measured before, during and after each task. Illness history and medication use were obtained from medical records. Multiple linear regression analysis, adjusted for age, gender, education, chronic illness, and medication use, revealed that cortisol responses were inversely related to memory performance. Additionally, superior memory was associated with more effective post-task recovery of heart rate (in both men and women) and diastolic blood pressure recovery in men. Cardiovascular recovery effects were independent of covariates, and of levels of heart rate and blood pressure measured during tasks themselves. These associations were also independent of subjective ratings of stress and perceived performance. Neither neuroendocrine nor cardiovascular responses were related to performance of the reasoning task. We conclude that memory in the elderly is associated both with hypothalamic–pituitary–adrenocortical function and cardiovascular regulation. Disturbances of neuroendocrine and hemodynamic function may be related to greater vulnerability to cognitive decline.

Objective: Using an experimental paradigm this investigation explored whether exposure to psychological stress would produce a significant increase in acid-reflux episodes or modify subjective perceptions of gastro-oesophageal reflux (GOR) symptoms. Methods: Forty-two patients presenting with heartburn and acid regurgitation underwent 24-h oesophageal pH monitoring. During the last 90 min of this monitoring period, 21 patients received a psychological stressor, while the remaining participants were randomly assigned to a no-stress control condition. State anxiety and subjective GOR symptom ratings were obtained I min pretest, I min posttest, and 40 min posttest. Cortisol samples were collected at 10-min intervals. Results: The stressor induced a significant increase in cortisol and state anxiety; however, this was not associated with any increase in reflux. Instead, the experimental group reported a dissociation between objectively measured reflux episodes and subjective symptom ratings. A similar pattern was established for participants who reported greater state anxiety, produced larger cortisol responses, or exhibited certain stress-related personality characteristics. Conclusion: The perception of symptoms in the absence of increased reflux when one is stressed may account for low response rates to traditional treatments. This highlights a need to bridge the gap between psychosomatic research and clinical practice to develop more successful GOR therapies. (c) 2005 Published by Elsevier Inc.

Inflammatory diseases are commonly associated with depressed mood. This association may be influenced by the production of proinflammatory cytokines. Accordingly, we assessed whether cytokine levels and mood (measured with the profile of mood states) could be altered by a mild, non-sickness inducing, acute inflammatory stimulus. Using a randomised placebo-controlled, double-blind design, 30 healthy male volunteers were injected with Salmonella typhi vaccine or placebo. Assessments of mood, symptoms of illness and temperature were made at baseline and at 1.5, 3, and 6h post-injection. Plasma concentrations of interleukin-6 (IL-6), interleukin-1 receptor antagonist (IL-1Ra), and tumour necrosis factor-α (TNF-α) were assessed at baseline and 3h post-injection. No significant symptoms of illness were reported in either group. Mood was more negative following injection in the vaccine than the placebo group, and the vaccine group experienced a 106% increase in IL-6 concentration. Negative changes in mood following injection were significantly correlated with increases in IL-6 production. No changes in TNF-α or IL-1Ra concentration were recorded in either group. It is concluded that S. typhi vaccination may be a useful model of mild inflammatory challenge, producing a significant transient cytokine-induced decrease in mood in the absence of any febrile response. Implications for depressed mood in physical illness are discussed.