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OBJECTIVE Smoking is associated with reduced bone density and calcium absorption, and reduced serum levels of vitamin D. A compensatory increase in serum parathyroid hormone (PTH) would therefore be expected as a result of an altered calcium balance. However, reports on PTH levels in smokers are conflicting. As serum PTH levels give important information on(More)
Single photon emission computed tomography (SPECT) images were obtained in 3 healthy volunteers and 7 parkinsonian patients 22 h after injection of 120 MBq iodine-123-beta-CIT. There was a high radioactivity in the striatal region against a uniform background in the volunteers but pronouncedly reduced striatal activity in the patients. Total striatal(More)
OBJECTIVE To study whether serum parathyroid hormone (PTH) and serum calcium are associated with body mass index (BMI), and their predicting role in obesity. DESIGN Population based, cross-sectional study. METHODS In 2001 a population-based health survey was held in Tromsø, North Norway. Questionnaires on medical history and life-style factors were(More)
CONTEXT Investigators first described the night-eating syndrome (NES), which consists of morning anorexia, evening hyperphagia, and insomnia, in 1955, but, to our knowledge, this syndrome has never been subjected to careful clinical study. OBJECTIVE To characterize NES on the basis of behavioral characteristics and neuroendocrine data. DESIGN AND(More)
Studies of seasonal variation in male testosterone levels show contradictory results. We report here a cross-sectional study of the seasonal variation in total and free testosterone, LH, and SHBG levels in 1548 men living in north Norway, a population exposed to a wide seasonal variation in temperature and daylight. Total testosterone showed a bimodal(More)
Total serum calcium levels were measured in 12 865 men and 14 293 women, between the ages of 25 and 97 years, in the Tromsø Study during 1994 and 1995. With the use of a sex-specific multiple linear regression model with age, calcium, body mass index, cholesterol, HDL cholesterol, triglycerides, systolic and diastolic blood pressure, and pulse as possible(More)
Nine healthy subjects were studied on two separate occasions, at least two weeks apart, using the glucose clamp technique to produce a gradual hypoglycaemia. Glucose thresholds for neuroendocrine and symptom responses varied up to 1.5 mmol/l between subjects. There was a significant correlation between individual glucose thresholds on day 1 and 2 for(More)
The aim of this study was to assess the effect of a low-dose testosterone on body composition and pulmonary function, as well as on quality of life, sexuality, and psychological symptoms in patients with chronic obstructive pulmonary disease (COPD). Twenty-nine men with moderate to severe COPD were allocated to receive either 250 mg of testosterone or(More)
The level of serum calcium appears to be associated with blood pressure and metabolic risk factors for cardiovascular disease. Determinants of serum calcium may therefore be of interest. In a health survey in Tromsø in 1994–1995, 27,159 subjects were examined. The survey included measurements of serum calcium and questionnaires on diet and lifestyle(More)
Food intake, body weight, serum levels of triiodothyronine (T3) and free thyroxine (FT4), and metabolic rate were measured at intervals in Svalbard (SR) and Norwegian (NR) reindeer. From summer to winter food intake decreased 57 (SR) and 55% (NR), while body weight decreased 8.6 (SR) and 3.8% (NR). In SR T3 and FT4 changed seasonally, whereas this was only(More)