Timing of the human sleep-wake cycle is determined by social constraints, biological processes (sleep homeostasis and circadian rhythmicity) and environmental factors, particularly natural and electrical light exposure. To what extent seasonal changes in the light-dark cycle affect sleep timing and how this varies between weekdays and weekends has not been firmly established. We examined sleep and activity patterns during weekdays and weekends in late autumn (standard time, ST) and late spring (daylight saving time, DST), and expressed their timing in relation to three environmental reference points: clock-time, solar noon (SN) which occurs one clock hour later during DST than ST, and the midpoint of accumulated light exposure (50% LE).
View Article and Find Full Text PDFThe aim of the study was to assess iron serum levels and markers of iron stores in non-anemic fibromyalgia (FM) patients and to evaluate their impact on the prevalence and clinical manifestations of FM patients. Eighty-four patients with primary FM and 87 controls were investigated. Demographic and clinical data were collected from all participants.
View Article and Find Full Text PDFObjective: To evaluate the effect of parathyroidectomy on metabolic abnormalities associated with cardiovascular disease in patients with primary hyperparathyroidism (PHPT).
Methods: Thirty-four patients with PHPT (aged 51.0 ± 11.
Objective: To investigate the degree of nonarticular tenderness and functional status in patients with diffuse idiopathic skeletal hyperostosis (DISH). We assessed these variables' correlation with their clinical, radiographic, and constitutional measurements and with metabolic syndrome (MS).
Methods: Eighty-seven patients with DISH were compared with 65 controls without DISH.