Parallel reductions of IgE and exhaled nitric oxide after optimized anti-inflammatory asthma treatment.

Immunoglobulin E (IgE) is crucial for the development of airway inflammation in atopic asthma, and inhibition of IgE using monoclonal antibodies is now part of asthma therapy. However, the impact of ordinary anti-inflammatory treatment on IgE is unclear. The aim of this study was to investigate if optimization of treatment with inhaled corticosteroid (ICS) and leukotriene-receptor antagonist (LTRA) according to symptoms or exhaled nitric oxide (FENO) levels over a one-year period affects IgE concentrations. Altogether, 158 relatively well-controlled but multi-sensitized asthmatics (age 18-65 years), with ongoing ICS treatment at baseline, were included in this post hoc analysis of data from a randomized, controlled trial on FENO-guided asthma therapy. Asthma control and quality of life (Juniper ACQ and mAQLQ), FENO, and serum IgE were measured at baseline and after one year. Concentrations of IgE antibodies to six common perennial aeroallergens were summed up (perennial IgE). We found that perennial and total IgE decreased by 10.2% and 16.0% (P < .001 both comparisons). This was not related to allergen exposure, whereas the total use of ICS and LTRA during the year correlated with the reduction in perennial IgE (P = .030 and P = .013). The decrease in perennial and total IgE correlated significantly with the reduction in FENO (P < .003 and P < .001), and with improvements in ACQ and mAQLQ scores (P < 0.05, all comparisons). We conclude that one year of optimization of treatment with ICS and LTRA in patients with persistent atopic asthma resulted in significant decreases in total IgE and IgE antibodies; these decreases correlated with a reduction in FENO and improvements in asthma control and quality of life. Thus, IgE is reduced by ordinary asthma controller medications and the effect on IgE seems to be clinically important.

Testosterone, sex hormone-binding globulin and the metabolic syndrome in men: an individual participant data meta-analysis of observational studies.

BACKGROUND: Low total testosterone (TT) and sex hormone-binding globulin (SHBG) concentrations have been associated with the metabolic syndrome (MetS) in men, but the reported strength of association varies considerably. OBJECTIVES: We aimed to investigate whether associations differ across specific subgroups (according to age and body mass index (BMI)) and individual MetS components. DATA SOURCES: Two previously published meta-analyses including an updated systematic search in PubMed and EMBASE. STUDY ELIGIBILITY CRITERIA: Cross-sectional or prospective observational studies with data on TT and/or SHBG concentrations in combination with MetS in men. METHODS: We conducted an individual participant data meta-analysis of 20 observational studies. Mixed effects models were used to assess cross-sectional and prospective associations of TT, SHBG and free testosterone (FT) with MetS and its individual components. Multivariable adjusted odds ratios (ORs) and hazard ratios (HRs) were calculated and effect modification by age and BMI was studied. RESULTS: Men with low concentrations of TT, SHBG or FT were more likely to have prevalent MetS (ORs per quartile decrease were 1.69 (95% CI 1.60-1.77), 1.73 (95% CI 1.62-1.85) and 1.46 (95% CI 1.36-1.57) for TT, SHBG and FT, respectively) and incident MetS (HRs per quartile decrease were 1.25 (95% CI 1.16-1.36), 1.44 (95% 1.30-1.60) and 1.14 (95% 1.01-1.28) for TT, SHBG and FT, respectively). Overall, the magnitude of associations was largest in non-overweight men and varied across individual components: stronger associations were observed with hypertriglyceridemia, abdominal obesity and hyperglycaemia and associations were weakest for hypertension. CONCLUSIONS: Associations of testosterone and SHBG with MetS vary according to BMI and individual MetS components. These findings provide further insights into the pathophysiological mechanisms linking low testosterone and SHBG concentrations to cardiometabolic risk.

Inflammation and positive affect are associated with subjective health in women of the general population.

Poor subjective health has been associated with higher levels of inflammatory cytokines. We investigated whether such an association would apply to women of the general population. Levels of cytokines, affect and subjective health were assessed in 347 women of the general population aged 45 to 90 years. Higher levels of interleukin-6 were associated with poor subjective health, especially in participants over 65 years of age. Positive affect was a more robust determinant of subjective health than negative affect. The presence of low-grade inflammation and absence of positive affect, rather than presence of negative affect, may be important determinants of subjective health.

Anti-inflammatory treatment of atopic asthma guided by exhaled nitric oxide: a randomized, controlled trial.

BACKGROUND: Atopic asthma is characterized by Th2 cytokine-driven inflammation of the airway mucosa, which is signaled by the fraction of exhaled nitric oxide (FENO). OBJECTIVE: We tested whether an FENO-guided anti-inflammatory treatment algorithm could improve asthma-related quality of life and asthma symptom control, and reduce exacerbations in atopic asthmatics within primary care. METHODS: Altogether, 187 patients with asthma and who were nonsmokers (age range, 18-64 years) with perennial allergy and who were on regular inhaled corticosteroid treatment were recruited at 17 primary health care centers, randomly assigned to 2 groups and followed up for 1 year. For the controls (n = 88), FENO measurement was blinded to both operator and patient, and anti-inflammatory treatment was adjusted according to usual care. In the active group (n = 93), treatment was adjusted according to FENO. Questionnaires on asthma-related quality of life (Mini Asthma Quality of Life Questionnaire) and asthma control (Asthma Control Questionnaire) were completed, and asthma events were noted. RESULTS: The Asthma Control Questionnaire score change over 1 year improved significantly more in the FENO-guided group (-0.17 [interquartile range {IQR}, -0.67 to 0.17] vs 0 [-0.33 to 0.50]; P = .045), whereas the Mini Asthma Quality of Life Questionnaire score did not (0.23 [IQR, 0.07-0.73] vs 0.07 [IQR, -0.20 to 0.80]; P = .197). The change in Asthma Control Questionnaire was clinically important in subpopulations with poor control at baseline (P = .03). Furthermore, the exacerbation rate (exacerbations/patient/y) was reduced by almost 50% in the FENO-guided group (0.22 [CI, 0.14-0.34] vs 0.41 [CI, 0.29-0.58]; P = .024). Mean overall inhaled corticosteroid use was similar in both groups (P = .95). CONCLUSION: Use of FENO to guide anti-inflammatory treatment within primary care significantly reduced the exacerbation rate and improved asthma symptom control without increasing overall inhaled corticosteroid use.

Leptin and adiponectin: distribution and associations with cardiovascular risk factors in men and women of the general population.

OBJECTIVE: In view of the increasing prevalence of obesity worldwide, understanding the role of the recently discovered adipokines leptin and adiponectin is of high clinical relevance. The aim of the present study was to assess the association between levels of leptin and adiponectin with age, known cardiovascular risk factors and to establish whether there are differences between men and women of the general population. METHODS: A total of 98 men and 107 women of the general population, aged between 20 and 74 years, underwent a medical examination at a clinical research center and fasting morning blood samples were also taken. RESULTS: Leptin (mean 7.5 µg l(-1) in men and 16.0 µg l(-1) in women) and adiponectin (mean 7.3 mg l(-1) in men and 11.9 mg l(-1) in women) levels were higher in women than men (Ps < 0.001). Both leptin and adiponectin levels increased with advancing age in both men and women (Ps < 0.05). Leptin was highly associated with factors for metabolic syndrome in men while in women, leptin was highly associated with inflammatory factors. Adiponectin was associated with blood lipids in both men and women, and glucose homeostasis more in women than in men. CONCLUSIONS: Leptin and adiponectin levels were ∼2 times and 1.5 times higher in women than in men, respectively. In addition, although leptin and adiponectin were associated to CVD risk factors in both men and women, we observed differences in specific CVD risk factor groups between men and women. These differences may be due to different regulatory mechanisms and effects of these adipokines in men and women.

Association between self-rated health and asthma: a population-based study.

INTRODUCTION: Self-rated health (SRH) is a relevant measure of health as it can predict morbidity, mortality and health-care use. Studies have shown an association between poor SRH and elevated levels of circulating inflammatory cytokines. It is therefore interesting to learn more about the association between asthma, a chronic inflammatory disease with a recognised systemic component and SRH. OBJECTIVES: To compare SRH ratings in respondents with and without current asthma. A second aim was to compare SRH with quality-of-life ratings in the same groups. METHODS: In 1995, we randomly selected 8200 persons ≥ 18 years from the population of Stockholm County, Sweden and mailed them a questionnaire. A total of 5355 persons (67.5%) responded. Respondents were divided in two groups, those with and those without current asthma. The groups were further divided by sex and age (18-44 and ≥ 45 years). SRH was measured with the question 'How do you rate your general health status?' and quality of life with the Gothenburg Quality of Life Instrument and the Ladder of Life. RESULTS: Respondents with asthma rated their health significantly worse than did those without asthma, except women aged 18-44 years. SRH was associated at least as strong as quality of life to asthma with the advantage of being easier to apply (only one item). CONCLUSION: Information on SRH is easy to obtain and represents an important dimension of health status that potentially can be used as a complement to identify patients who need extra attention to manage their asthma and its consequences.

Associations between leptin and self-rated health in men and women.

BACKGROUND: As an important mediator by which the brain receives information about the body's energy state, leptin may be associated with subjectively perceived health. OBJECTIVE: The main aim of the present study was to investigate concurrent and prospective associations between leptin and self-rated health (SRH), a strong predictor of morbidity and mortality, in a random population sample. An additional aim was to examine whether sick leave was associated with leptin and poor SRH. METHODS: In a prospective, population-based cohort study in Sweden, men and women underwent a medical examination in 1998, at which time blood was drawn and participants were asked to respond to a questionnaire concerning demographics, health behavior, and psychosocial factors. In 2000, the participants responded to a second questionnaire sent by postal mail. Spearman rank correlations were used to investigate the relationships between leptin, SRH, sick leave, and background variables. Partial Spearman coefficients were then calculated to investigate the patterns of association between leptin, SRH, and sick leave independent of age, body mass index (BMI), presence of diagnosis, and testosterone or estradiol. RESULTS: A total of 98 men and 104 women, aged 23 to 76 years, and 91 men and 96 women at follow-up, participated in the study. In men, relatively higher levels of leptin were prospectively associated with relatively worse SRH (rho = 0.20; P = 0.05), but the relationship was not significant in the cross-sectional analysis (rho = 0.18; P = 0.07). This association was not found in women. When controlling for age, BMI, presence of diagnosis, and testosterone, higher levels of leptin were associated with poor SRH in men in cross-sectional analysis (rho = 0.27; P < 0.01) but not prospectively. In women, leptin was not associated with SRH in cross-sectional analysis, but relatively higher levels were prospectively associated with better SRH when adjusted for background factors and estradiol (rho = -0.26; P < 0.05). SRH was independently associated with future sick leave in both men (rho = 0.34; P < 0.01) and women (rho = 0.30; P < 0.05), whereas no association between leptin and future sick leave was found. CONCLUSIONS: Contrasting associations were found between men and women in the relationship between leptin and SRH. Based on the finding that higher leptin levels were associated with better SRH in women than in men, along with corroboration from recent studies, we propose that leptin may serve different psychobiological functions in men than in women.

A five-year rehabilitation programme for younger women after a coronary event reduces the need for hospital care.

AIMS: Cardiovascular disease (CVD) is the dominant diagnosis in in-patient care in Sweden and the third most common cause for long-term sick leave and disability pension. Women are higher consumers of health care than men and have higher frequencies of sickness absenteeism. The aim of this paper was to evaluate whether a five-year long rehabilitation programme for women with CVD affected the use of hospital care and sickness absenteeism. METHODS: 130 women below 65 years of age with CVD were randomized to either intervention (n = 69, mean age 52.4 years) with an intensive lifestyle programme (e.g. physical exercise, smoking cessation, dietary advice), including stress management or to standard care (n = 61, mean age 54.3 years). All patients went through baseline medical examinations, including self-administered questionnaires. This procedure was repeated yearly during the rehabilitation period. The frequency of cardiac-related healthcare use was followed via official registers. RESULTS: Emergency visits and number of in-patient days decreased significantly in the intervention group from year one to year five (p < 0.05) but remained unchanged in the control group. Scheduled doctor visits decreased significantly in both groups. There were no significant differences between groups regarding proportion of women on sick leave after one, three and five years. CONCLUSIONS: This extensive intervention programme reduced visits at emergency wards and numbers of in-patient days, which in the long run may have beneficial effects on public finances and the patient's quality of life. The study confirmed previous findings from interventions showing difficulties in influencing sick-leave rates.

Plasma levels of insulin-like growth factor-I, insulin-like growth factor binding protein-1, coenzyme Q10 and vitamin E in female populations from Poland, Serbia and Sweden.

Exposure to environmental contaminants such as polycyclic aromatic hydrocarbons (PAHs), life style and nutritional status of a population are important factors that may influence normal serum levels of antioxidants and the insulin-like growth factor system. In this study we examined serum levels of insulin-like growth factor-I (IGF-I), insulin-like growth factor binding protein-1(IGFBP-1), coenzyme Q10 (CoQ) and vitamin E in healthy female populations (n=4 x 100) aged 19-59 years from Poland (PL), Sweden (SE), Serbia I (SR I) and Serbia II (SR II). The last group lived in an environmental emergency area affected by the bombings of 1999 in Serbia. The Polish and SR I cohorts exhibited low IGFSD-score levels, (-2 to +/-0), compared to females from SE with IGFSD-score 0. In the SR II population, the IGFSD range was between -1 and 1. The IGFBP-1 levels of the Polish and SR I groups were lower than in the Swedish population, while the SR II levels showed a broader distribution, 20-80 microg/l. The CoQ values in the Swedish and Polish samples were around 1 nmol/ml. In contrast, the SR I cohorts exhibited higher concentrations, 1.5-3.5 nmol/ml and the SR II group had extremely low levels, <0.5 nmol/ml. The vitamin E concentrations were similar in the Polish and Swedish populations, 20-40 nmol/ml, while it was twice as high, 40-80 nmol/ml in the SR I and very low in the SR II group, which is half of the Polish and Swedish cohorts. These results suggest that different lifestyles and environmental factors affect both the IGF system and the antioxidants CoQ10 and vitamin E in female populations in Europe. The females living in the polluted area had different patterns of both the IGF and antioxidant systems. These findings may explain differences in morbidity and mortality in these countries.

Relationship between exhaled nitric oxide and IgE sensitisation in patients with asthma: influence of steroid treatment.

INTRODUCTION: The influence of the degree of immunoglobulin E (IgE) sensitisation on the fraction of expired nitric oxide (FE(NO)) in asthma patients being treated with inhaled corticosteroids (ICS) is not well known. OBJECTIVES: To investigate the relationship between IgE sensitisation and FE(NO), and the effect of a step-up in ICS treatment on this relationship, in patients with allergic asthma. METHODS: A primary health care centre recruited 20 non-smoking patients with perennial allergic asthma (18 years-50 years, six male) outside the pollen season. At every visit (0, 2, 4, 8 weeks), FE(NO) was measured and an exposure questionnaire was completed. ICS dose was adjusted according to FE(NO) (>or=22 ppb prescribed increase in ICS). Quantitative analyses of serum IgE (eight common aeroallergens) confirmed allergy. RESULTS: At baseline, FE(NO) and the sum of IgE antibody titres for perennial allergens correlated significantly (r = 0.47, P = 0.04). After a step-up in ICS treatment, this correlation had disappeared. Nine patients had persistently elevated FE(NO) at last visit (mean 35 ppb vs 16 ppb). This group was more frequently exposed to relevant allergens or colds (89% vs 27% of patients, P < 0.05) and had higher IgE antibody titres (perennial allergens) compared with the normalised group (mean 28.9 kU/L vs 10.7 kU/L, P < 0.05). CONCLUSION: Serum IgE against perennial allergens and FE(NO) correlate in patients with allergic asthma. However, this relationship disappears after a high-dose ICS regimen, suggesting that FE(NO) relates to bronchial inflammation and not IgE levels per se. High degree of IgE sensitisation together with allergen exposure may lead to ICS-resistant airways inflammation.

Gender differences in self-rated health, quality of life, quality of care, and metabolic control in patients with diabetes.

BACKGROUND: Because the projected increase in the number of diabetic patients is expected to strain the capabilities of health care providers worldwide, we are challenged to find ways of reducing the burden of diabetes. Maintaining and improving health-related quality of life (QoL) for diabetic patients may be viewed as public health goals. OBJECTIVE: The aim of this cross-sectional study was to compare different aspects of health, QoL, and quality of care (QoC) between men and women with diabetes as a basis for planning and managing diabees care. METHODS: All patients in 2 age groups (aged 20-30 years [younger age group] and aged 50-60 years [middle-aged group]) who were registered with the Department of Endocrinology, Metabolism, and Diabetes at Karolinska University Hospital, Stockholm, Sweden, in October 2004, were recruited for a survey. Questions were included about self-rated health (SRH), QoL, QoC, diabetes-related worries, occupational status, physical activity level, living arrangements, and educational background. Glycosylated hemoglobin (HbA1c) values were obtained from medical records. RESULTS: Of the 223 eligible patients (109 men, 114 women) in the younger age group, 49 men and 74 women responded to the questionnaire; of the 300 eligible patients (170 men, 130 women) in the middle-aged group, 120 men and 93 women responded. Middle-aged women rated their mental well-being and QoL as worse compared with men (P < 0.001 and P < 0.05, respectively). In both age groups, women reported more diabetes-related worries and less ability to cope (P < 0.05 for the younger age group and P < 0.001 for the middle-aged group for both variables), thus the differences were more marked for middleaged women. Although there were no gender differences in metabolic control, middle-aged women reported less satisfaction with diabetes care (P < 0.001). Higher HbA1c was related to worse SRH in both men and women when analyzing the age groups together (P < 0.05). This association was most prominent in young women, in whom having more diabetes-related worries was also related to higher HbA1c (P < 0.01). CONCLUSION: In this study, women with diabetes appeared to have worse QoL and mental well-being compared with men with diabetes. Therefore, identifying strategies to improve SRH and QoL among diabetic patients, especially among women, is of great importance.

Eating meals irregularly: a novel environmental risk factor for the metabolic syndrome.

BACKGROUND: Skipping meals is a common practice in our current society; however, it is not clear whether eating meals regularly is associated with the metabolic syndrome. OBJECTIVE: Our aim was to assess the association of eating meals regularly with parameters of the metabolic syndrome and insulin resistance in a representative population-based cohort of 60-year-old men and women. METHODS AND PROCEDURES: A population-based cross-sectional study of 3,607 individuals (1,686 men and 1,921 women), aged 60 years, was conducted in Stockholm County, Sweden. Medical history, socioeconomic factors, and lifestyle data were collected by a questionnaire and a medical examination, which included laboratory tests. RESULTS: Of the subjects who were regular eaters, 20% fulfilled the criteria for the metabolic syndrome vs. 27% of subjects who were irregular eaters (P < 0.0001). The adjusted odds ratio (OR) for having the greatest number of components of the metabolic syndrome in subjects who were regular eaters was 0.27 (95% confidence interval (CI), 0.13-0.54) using subjects who did not fulfill any criteria for the metabolic syndrome as a reference group. Eating meals regularly was also inversely related to insulin resistance (OR, 0.68 (95% CI, 0.48-0.97)) and to gamma-glutamyl transferase (OR, 0.52 (95% CI, 0.33-83)) after full adjustment. DISCUSSION: Eating meals regularly is inversely associated to the metabolic syndrome, insulin resistance and (high) serum concentrations of gamma-glutamyl transferase. These findings suggest that eating meals irregularly may be part of several potential environmental risk factors that are associated with the metabolic syndrome and may have future implications in giving dietary advice to prevent and/or treat the syndrome.

Inflammatory cytokines, behaviour and age as determinants of self-rated health in women.

Self-rated health is a powerful and independent predictor of long-term health, but its biological basis is unknown. We have shown previously that self-rated health is associated with increased levels of circulating cytokines in women. The main aim of the present study was to increase the understanding of the association between markers of wellbeing, such as self-rated health, and cytokines and to investigate the impact of age on these associations. In 174 female consecutive primary health care patients divided into three age groups, we examined subjective ratings of health and aspects of wellbeing and circulating levels of IL (interleukin)-1beta, IL-1ra (IL-1 receptor antagonist), IL-6 and TNF-alpha (tumour necrosis factor-alpha). Poor self-rated health was significantly associated with higher levels of TNF-alpha in all of the age groups. For IL-1beta and IL-1ra, the correlations with self-rated health were significant only in the oldest age group. Lower ratings of other measurements of health and wellbeing were related to higher levels of cytokines, most pronounced for TNF-alpha and IL-1beta, and in the middle and olderst age groups. More symptoms resembling a sickness response induced by inflammation were implicated to be associated with lower self-rated health. The strength of the association between inflammatory cytokines and poor health perception increased with advanced age, indicating an increased vulnerability for inflammatory activity during aging. It is suggested that higher levels of TNF-alpha are connected to a sickness response that, in turn, is connected to self-rated health. The results provide a possible psychobiological basis to understand better diffuse subjective symptoms and poor subjective health in women.

Do different factors explain self-rated health in men and women?

BACKGROUND: Self-rated health has elicited special interest, in the wake of a number of studies demonstrating that it is a powerful predictor of future mortality, mare so for men than for women. The association between self-rated health and biological correlates also appears to differ between men and women, for reasons unknown. OBJECTIVE: The purpose of this study was to examine gender differences in the interpretation and/or valuation of health-related information by comparing men and women's association of abroad array of perceived health determinants with their statements about health. METHODS: We conducted a cross-sectional study in a randomly selected population of 8200 men and women aged >17 years in Stockholm, Sweden. Subjects received a 120-item questionnaire that included measures of health care utilization, lifestyle, demographics, psychosocial factors, and mental, functional, and physical health. RESULTS: Among the 5470 people who responded to the questionnaire, most of the 42 potential correlates (41 for men, 40 for women) were significantly correlated to self-rated health. The overall association pattern was surprisingly similar for men and women. However, some small differences appeared: educational level, physical activity, and cultural activities played a more crucial role when men judged their health, whereas satisfaction with sleep and doctor visits played a more crucial role when women judged their health. These results were also for the most part confirmed in regression analyses that included all variables. The correlates explained 50% of the variance in self-rated health for both men and women. CONCLUSIONS: Our results highlight the necessity of taking a broad perspective on potential correlates when analyzing mechanisms of self-rated health. When judging their own health, men and women appear to consider approximately the same broad array of factors. The similarities in association patterns indicate that men and women interpret and/or value health-related factors similarly when making statements about health. These results may influence the medical profession's acceptance or consideration of self-rated health. Understanding the gender-specific mechanisms involved in the assessment of self-rated health may contribute to the promotion of health-protective behavior and health intervention practices.

Gender differences in the relation of insulin-like growth factor binding protein-1 to cardiovascular risk factors: a population-based study.

OBJECTIVE: A possible involvement of insulin-like growth factor-I (IGF-I) and its binding protein IGFBP-1 in the pathogenesis of cardiovascular disorder has been suggested. However, few publications have addressed the gender differences in cardiovascular risk factors in relation to the IGF/IGFBP system. The aim of the present study was to study gender differences in the relationship between fasting serum levels of IGFBP-1 and cardiovascular risk factors in a normal population of men and women. DESIGN: Cross-sectional study. Patients A normal population of 273 men and women aged 20-74 years. MEASUREMENTS: A medical examination was performed and blood drawn in the morning after subjects had been fasting overnight. Before the examination, they were asked to fill out a questionnaire concerning lifestyle and psychosocial factors. RESULTS: Fasting IGFBP-1 was lower in men than in women and was positively correlated to age in men but not in women. The men had in general a more disadvantageous cardiovascular risk profile than women, with several indicators of the metabolic syndrome: higher blood pressure and higher serum levels of total cholesterol, triglycerides, low density lipoprotein cholesterol (LDL-C), plasma-glucose and insulin, as well as lower IGFBP-1. Women had lower physical activity, lower consumption of alcohol, and lower values on indicators of psychosocial and mental health but had a healthier diet. Our findings indicate that low circulating levels of IGFBP-1 are associated with the well-known risk factors of cardiovascular disease; however, the association showed a different pattern for men and women. In men we found a negative association with body mass index (BMI), insulin resistance and diastolic blood pressure, and a positive association with SHBG, cortisol and testosterone. For women low IGFBP-1 appears in negative associations with BMI, waist-hip ratio (WHR), insulin resistance and testosterone, and in positive associations with SHBG and cortisol. Significant gender differences in the correlation with IGFBP-1 are seen for testosterone, cortisol, SHBG, WHR and oestradiol. For HDL-C and diastolic blood pressure the gender difference in correlation was at the limit of significance (P < 0.10). CONCLUSION: Low circulating levels of IGFBP-1 are associated with the well-known risk factors of cardiovascular disease; however, the association showed a different pattern for men and women. The most marked gender differences in the correlation with IGFBP-1 are seen for testosterone, cortisol, SHBG, WHR, oestradiol, HDL-C and diastolic blood pressure. Our study emphasizes the importance of separate analyses for men and women. The results presented are a step towards gaining a better understanding of the gender differences in cardiovascular disease and in the regulation of IGFBP-1, though further prospective studies are needed.

Locus of control and weight reduction.

The objective of this study was to determine if locus of control orientation is predictive for weight loss among participants in a behaviour modification weight reduction programme. The subjects completed a locus of control questionnaire consisting of 40 questions before starting the programme and again after 1 year. Forty-one participants started the programme, 28 remained after 1 year. Their weight loss was significant (P < 0.001) and associated with an internal locus of control orientation (P < 0.05). The findings suggest that different weight reduction activities could be offered depending on the person's locus of control orientation. Participants with an internal orientation could be offered a standard weight reduction programme. Others, with a more external locus of control orientation, could be offered an adapted programme, which also focused on and encouraged the participants' internal orientation.

Are sexual dissatisfaction and sexual abuse associated with obesity? A population-based study.

OBJECTIVE: To investigate whether there is any association between obesity and sexual satisfaction and sexual abuse in a normal population. RESEARCH METHODS AND PROCEDURES: A representative sample of 2810 subjects from a population study was interviewed about sexual satisfaction, sexual abuse, and life satisfaction. The answers from normal weight, overweight, and obese participants were compared. Univariate and multivariate analyses were performed. RESULTS: Data were presented separately for two age groups, 18 to 49 and 50 to 74 years, and gender. The older group of obese men reported a greater decrease of sexual desire compared with 5 years prior than normal weight men [odds ratios (OR), 2.44; 95% confidence interval (CI), 1.4 to 4.3]. The older group of overweight men reported involuntary participation in sexual activities more often than normal weight men (OR, 2.06; 95% CI, 1.1 to 3.8). Although older overweight and obese women were diagnosed with a lingering disease (defined as >1 month) more often than normal weight women (overweight: OR, 2.41; 95% CI, 1.3 to 4.4; obese: OR, 4.45; 95% CI, 1.7 to 11.5), there was no difference between BMI groups in satisfaction with physical health. DISCUSSION: Overweight and obese groups seem to be heterogeneous with respect to sexual satisfaction and experiences of sexual abuse. No significant differences were detected between BMI groups, which does not exclude the possibility of significant differences between BMI groups among patients seeking medical attention.

Self-rated health is related to levels of circulating cytokines.

OBJECTIVE: Self-rated health is a powerful and independent predictor of long-term health, but its biological basis is unknown. Because factors associated with poor self-rated health (eg, pain, daily discomforts, and low energy and fitness) resemble symptoms of a generalized cytokine-induced sickness response, we examined the relationship between circulating cytokines and self-rated health. METHODS: In 265 consecutive primary health care patients (174 women and 91 men), we examined self-rated and physician-rated health, circulating levels of interleukin (IL)-1beta, IL-1 receptor antagonist (IL-1ra), IL-6, and tumor necrosis factor (TNF)-alpha as determined from plasma samples using high-sensitivity enzyme-linked immunoassay. RESULTS: Self-rated health correlated with levels of IL-1beta (r = 0.27; p <.001), IL-1ra (r = 0.19; p <.05) and TNF-alpha (r = 0.46; p <.001) in women but not in men. Thus, poorer subjective health was associated with higher levels of inflammatory cytokines. Even when controlling for age, education, physical health, and diagnoses in multiple regression analyses, self-rated health was an independent and more robust predictor of cytokine levels than physician-rated health. CONCLUSIONS: The present findings suggest that an individual's health perception may be coupled to circulating cytokines. Because epidemiological research established that self-rated health predicts morbidity and mortality, the biological correlates and mechanisms of self-rated health need to be understood.

IGF-I in a normal population: relation to psychosocial factors.

OBJECTIVE: IGF-I has important actions on cell division, apoptosis, differentiation and metabolism, as well as on cell proliferation in vascular smooth muscle. Deficiency of GH, an important regulator of IGF-I, is associated with reduced well-being. IGF-I levels have been related to cognitive function in older individuals. The aim of the present study was to investigate the IGF-I concentrations in a normal population of men and women aged 20-74 years and to determine the influence of a variety of behavioural and psychosocial factors as well as metabolic factors on these concentrations. DESIGN: Cross-sectional study. PATIENTS: The study group consisted of 408 randomly selected people who had answered a questionnaire concerning health care utilization and quality of life that was administered to a random sample of 4200 people over age 17 from the northwestern region of greater Stockholm in 1995. Thirty-four men and 34 women were randomly selected from the age group 20-24 and from each 10-year age group between the ages of 25-75 years. Seventy-one per cent of the 408 people invited to come in for an examination agreed to attend, making a total sample size of 288 people. MEASUREMENTS: A medical examination was performed and blood drawn in the morning after subjects had been fasting overnight. Before the examination, they were asked to fill out a questionnaire concerning lifestyle and psychosocial factors. RESULTS: The distribution of IGF-I was positively skewed, but using logarithmically transformed IGF-I, a more symmetrical distribution was obtained. A linear inverse correlation was found between logarithmically transformed IGF-I levels and age which explained more than 40% of the variation in men and women. Linear correlation analysis between IGF-I and different parameters of health and disease, lifestyle and psychosocial factors, resulted in several significant correlations most of which disappeared after controlling for age. In the younger age group (20-44) there were positive correlations between IGF-I and psychosocial factors representing quality of life and psychological well-being. In the middle age group (45-59) higher IGF-I levels were related to better physical health, higher education and higher concentrations of lipoprotein Lp(a). In the older age group (over 59 years) higher levels of low-density lipoprotein-cholesterol (LDL-C) and lower levels of SHBG were associated with higher IGF-I levels. CONCLUSION: In a randomly selected (nondisease) population, IGF-I concentrations show a consistent decrease with age in both men and women, accompanied by different association patterns relevant to disease risk. Levels are related to psychosocial parameters in the younger age group and metabolic impairment associated with increased cardiovascular risk in the older age groups. We speculate on the relative roles of age and cohort differences in rearing conditions in determining these differences.