Göran Samsioe

Tubular and glomerular kidney effects in Swedish women with low environmental cadmium exposure

Cadmium is a well-known nephrotoxic agent in food and tobacco, but the exposure level that is critical for kidney effects in the general population is not defined. Within a population-based women’s health survey in southern Sweden (Women’s Health in the Lund Area, WHILA), we investigated cadmium exposure in relation to tubular and glomerular function, from 1999 through early 2000 in 820 women (71% participation rate) 53–64 years of age. Multiple linear regression showed cadmium in blood (median, 0.38 μg/L) and urine (0.52 μg/L; density adjusted = 0.67 μg/g creatinine) to be significantly associated with effects on renal tubules (as indicated by increased levels of human complex-forming protein and N-acetyl-β-d-glucosaminidase in urine), after adjusting for age, body mass index, blood lead, diabetes, hypertension, and regular use of nephrotoxic drugs. The associations remained significant even at the low exposure in women who had never smoked. We also found associations with markers of glomerular effects: glomerular filtration rate and creatinine clearance. Significant effects were seen already at a mean urinary cadmium level of 0.6 μg/L (0.8 μg/g creatinine). Cadmium potentiated diabetes-induced effects on kidney. In conclusion, tubular renal effects occurred at lower cadmium levels than previously demonstrated, and more important, glomerular effects were also observed. Although the effects were small, they may represent early signs of adverse effects, affecting large segments of the population. Subjects with diabetes seem to be at increased risk.

Cadmium-induced effects on bone in a population-based study of women

High cadmium exposure is known to cause bone damage, but the association between low-level cadmium exposure and osteoporosis remains to be clarified. Using a population-based women’s health survey in southern Sweden [Women’s Health in the Lund Area (WHILA)] with no known historical cadmium contamination, we investigated cadmium-related effects on bone in 820 women (53–64 years of age). We measured cadmium in blood and urine and lead in blood, an array of markers of bone metabolism, and forearm bone mineral density (BMD). Associations were evaluated in multiple linear regression analysis including information on the possible confounders or effect modifiers: weight, menopausal status, use of hormone replacement therapy, age at menarche, alcohol consumption, smoking history, and physical activity. Median urinary cadmium was 0.52 μg/L adjusted to density (0.67 μg/g creatinine). After multivariate adjustment, BMD, parathyroid hormone, and urinary deoxypyridinoline (U-DPD) were adversely associated with concentrations of urinary cadmium (p < 0.05) in all subjects. These associations persisted in the group of never-smokers, which had the lowest cadmium exposure (mainly dietary). For U-DPD, there was a significant interaction between cadmium and menopause (p = 0.022). Our results suggest negative effects of low-level cadmium exposure on bone, possibly exerted via increased bone resorption, which seemed to be intensified after menopause. Based on the prevalence of osteoporosis and the low level of exposure, the observed effects, although slight, should be considered as early signals of potentially more adverse health effects.

A new methodological approach to the evaluation of quality of life in postmenopausal women

An approach employing a range of standardized questionnaires, which included the Nottingham Health Profile (NHP), the Psychological General Well-Being (PGWB) index and the Mood Adjective Check List (MACL), was used to assess health-related quality of life (QoL) in conjunction with a study comparing two doses of transdermal oestrogen (50 or 100 micrograms/24 h) combined with an oral progestogen (5 mg medroxyprogesterone acetate for 14 days each cycle). In addition to the QoL measures, climacteric symptoms were self-rated and also summarized by means of the Kupperman index. In all, 59 women, median age 52 (39-71) years, who completed 4 months of therapy were evaluated. The use of a battery of standardized questionnaires enabled a comprehensive evaluation to be made of perceived health, well-being and day-to-day functioning. Not only was symptomatic relief, e.g. reduced frequency of sweating episodes, sleep disturbance and hot flushes, observed during treatment, but there were also improvements in terms of sleep, energy and emotions. The frequency of health-related problems associated with paid employment, housework, social life, home life and sex life decreased, indicating enhanced ability to take part in daily activities. The PGWB index showed improvement in the subscales representing well-being, anxiety, depression, vitality, health and self-control, while the mood scales indicated that the women experienced less tension and more satisfaction. Although the results of this study need to be further documented on the basis of a placebo-controlled trial, the findings nevertheless imply that the use of a battery of standardized questionnaires optimizes the possibility of evaluating climacteric complaints reliably before and after treatment.

Occurrence, nature and treatment of urinary incontinence in a 70-year-old female population

An intervention trial using oral oestriol to treat urinary incontinence was performed in a number of patients taken from a representative sample of 562 women aged 75 yr. The clinical series consisted of 34 patients who took part in a double-blind crossover study of the possible effects of oestriol, given in a single daily dose of 3 mg, and of a placebo over a period of 3 mth. The clinical examinations included bacteriological cultures and an assessment of the degree of atrophy of the surface membranes in the vagina. In most patients, oestriol was effective in reversing the atrophy. The clinical effect was excellent in urgency and mixed incontinence, but not in stress incontinence.

Socio‐demographic and psychosocial factors are associated with features of the metabolic syndrome. The Women's Health in the Lund Area (WHILA) study

Aim: The aim was to analyse any associations between socio‐demographic and psychosocial factors and different features of the metabolic syndrome in a geographically well‐defined population of middle‐aged women.

Menopause-related symptoms: what are the background factors? A prospective population-based cohort study of Swedish women (The Women's Health in Lund Area study).

OBJECTIVE The purpose of this study was to analyze the influence of sociodemographic characteristics and environmental factors on self-reported menopause-related symptoms among middle-aged Swedish women. STUDY DESIGN Women who were born in the years 1935 to 1945 and who were living in the Lund area of southern Sweden were investigated. Each woman completed a generic questionnaire and underwent a personal interview that pertained to sociodemographic characteristics, lifestyle, and current health-related problems. With these background factors, the frequency and intensity of hot flushes and vaginal dryness were determined; risk factor analysis was evaluated with the use of the multiple regression models. RESULTS There were 6917 participants, with a response rate of 64%. A lower risk for hot flushes was related to older age, high education, and vigorous physical exercise. The major risk factors for vasomotor complaints were current weight gain, part-time employment, oophorectomy, unhealthy lifestyle, and concomitant health problems. Light smoking, late age of menopause, higher education, and excessive weight reduced the risk of vaginal dryness. However, older age, marriage, and chronic diseases negatively affected vaginal complaints. The background factors had less impact on symptoms in women who used hormone replacement therapy. CONCLUSION Sociodemographic characteristics, lifestyle, and concomitant health problems appear to be important modifiable determinants for menopause-related symptoms.

Evaluation of a continuous oestrogen-progestogen regimen for climacteric complaints

Subjective complaints, endometrial histopathology, vaginal cytology and bleeding patterns were recorded in 26 patients treated with a continuous oestrogen-progestogen regimen for 12 mth. A marked reduction of hot flushes and sweats were noted and the evaluation of endometrial specimens revealed that the mucosae were mostly inactive-atrophic. The karyopyknotic index proved to be a poor indicator of oestrogenic activity. The number of recorded bleedings in the peri-menopausal women differed markedly from the post-menopausal women during treatment; they were very slight in the latter group. Even in those cases where bleeding occurred, the endometrial samples were found to be atrophic. Vaginal bleeding seemed to be an unreliable indicator of endometrial histopathology. The present combination of hormones used in a continuous regimen is a good alternative for post-menopausal women in need of hormonal therapy.

Exposure to p,p'-DDE: a risk factor for type 2 diabetes.

Background Persistent organic pollutants (POPs), such as PCBs, DDT and dioxins have in several cross-sectional studies shown strong associations with type 2 diabetes mellitus. Reversed causality can however not be excluded. The aim of this case-control study was to evaluate whether POPs concentration is a risk factor for type 2 diabetes. Methodology/Principal Findings A case-control study was performed within a well-defined cohort of women, age 50–59 years, from the Southern part of Sweden. Biomarkers for POP exposure, 2,2′,4,4′,5,5′-hexachlorobiphenyl (CB-153) and 1,1-dichloro-2,2-bis (p-chlorophenyl)-ethylene (p,p′-DDE) were analyzed in stored serum samples, which were collected at the baseline examination when the cohort was established. For 107 out of the 371 cases, serum samples were stored at least three years before their type 2 diabetes was diagnosed. In this data set, CB-153 and p,p′-DDE were not associated with an increased risk to develop type 2 diabetes. However, when only the cases (n = 39) that were diagnosed more than six years after the baseline examination and their controls were studied, the women in the highest exposed quartile showed an increased risk to develop type 2 diabetes (OR of 1.6 [95% 0.61, 4.0] for CB-153 and 5.5 [95% CI 1.2, 25] for p,p′-DDE). Conclusions/Significance The results from the present case-control study, including a follow-up design, confirms that p,p′-DDE exposure can be a risk factor for type 2 diabetes.

Overactive bladder: prevalence, risk factors and relation to stress incontinence in middle‐aged women

Objective  To investigate the prevalence of and factors associated with overactive bladder in middle‐aged women.

Important factors for use of hormone replacement therapy: a population-based study of Swedish women. The Women's Health in Lund Area (WHILA) Study

Objective: The aim of this study was to delineate the use of hormone replacement therapy (HRT) among women who were born between December 2, 1935, and December 1, 1945, and living in the Lund area of southern Sweden and to analyze factors that contribute to the acceptance and continuation of HRT. Methods: All women received a generic questionnaire pertaining to demographic background, lifestyle, health behavior, and climacteric symptoms and underwent a personal interview. An interim analysis was carried out on 3,900 women. We mailed a hormone questionnaire to the women who were using HRT (n = 1,875). This hormone questionnaire covered, for example, menopausal status, complaints, and alterations in and efficacy of HRT use, as well as the reasons for discontinuing HRT use. Results: A total of 1,415 (76%) women answered the hormone questionnaire. Forty‐eight percent were HRT ever users, and 32% were current users. Mean duration of HRT use was 47 months. The most common incentives for HRT use were alleviation of menopausal symptoms (72%) and prevention of bone loss (50%) and/or cardiovascular disease (31%). Forty‐seven percent of HRT users reported that they had changed regimens at least once. HRT users had higher education, full‐time work, and a higher consumption of alcohol but less consumption of cigarettes. They reported higher frequencies of climacteric symptoms, past histories of premenstrual syndrome, use of oral contraceptives, and hysterectomy. They also had a higher consumption of healthcare resources. A total of 177 women withdrew from therapy. The most common reasons for discontinuation of HRT were weight gain, anxiety of cancer, bleeding, breast tenderness, and emotional problems. Compared with current users, past users had less positive as well as fewer negative effects of HRT. Several variables contributed to compliance, including education, full‐time work, regular exercise, low frequency of persistent climacteric symptoms, and alteration of regimens. Conclusion: Education, working conditions, lifestyle, interest in prevention, and severity of the climacteric symptoms are determinants for both acceptance of and compliance with HRT. (Menopause 2000;7:273‐281.