CONTEXT Wide variations in Medicare expenditures exist across regions, but little is known about whether beneficiaries residing in low-expenditure regions perceive receiving lower-quality care than those in high-expenditure regions. OBJECTIVE To evaluate how Medicare beneficiaries' perceptions of their health care are related to per capita expenditure in the areas where they live. DESIGN, SET...

‎in this paper‎, ‎we propose two preconditioned aor iterative methods to solve systems of linear equations whose coefficient matrices are z-matrix‎. ‎these methods can be considered as improvements of two previously presented ones in the literature‎. ‎finally some numerical experiments are given to show the effectiveness of the proposed preconditioners‎.‎

BACKGROUND Childhood stunting has been associated with an increased risk of obesity in adulthood, but the causes are unclear. This study hypothesizes that stunting significantly reduces both resting and activity energy expenditure. AIM To assess and describe energy expenditure of low socio-economic Maya children and to determine whether stunting is independently related to energy expenditure ...

Recent years have seen a meteoric rise in microprocessor performance. Overall computer system performance, however, has not kept pace with that of its most glamorous component. One key bottleneck in system performance is le system I/O 17]. This paper investigates methods for improving le system performance by reducing or hiding disk latency. These methods monitor le accesses and infer relations...

By representing a system of budget shares as an approximate factor model we determine its rank, i.e. the number of common functional forms, or factors and we estimate a base of the factor space by means of approximate principal components. We assume that the extracted factors span the same space of basic Engel curves representing the fundamental forces driving consumers’ behaviour. We identify ...

The linear approximate version of the almost ideal demand system (LA-AIDS) model is estimated using data from the Lithuanian household budget survey (HBS) covering the period from July 1992 to December 1994. Price and real expenditure elasticities for 12 food groups were estimated based on the estimated coefficients of the model. Very little or nothing is known about the demand parameters of Li...

Obesity is a chronic disease that can lead to an increased risk of other serious chronic diseases and even death. We present switching and time-delayed feedback-based modelfree control methods for the dynamic management of body mass and its major components. The estimation of body composition based on human body weight dynamics is proposed using a soft switching-based observer. Additionally, th...

Multiple chronic conditions in cancer survivors are highly prevalent and may increase health care costs for both patients and the health care system. Studies of cancer survivors reveal positive effects of physical activity (PA) on reducing risk of cancer recurrence, other chronic conditions, and secondary cancer. Few nationally representative studies have examined how physical activity levels h...

OBJECTIVE To analyze expenditure on treatment for postmenopausal osteoporosis and associated factors on mean per capita expenditure. METHODS A probabilistic-deterministic linkage between the database of Authorizations for Highly Complex Procedures and the mortality information system was constructed, resulting in a historical cohort of patients using high-cost medications for the treatment of...

Syndrome de P -R court et QRS normal avec les crises de tachycardie Paroxystique ou le syndrome de (Lown-Ganong-Levine). Dans une enqete epidemiologique sur les ma­ladies cardiovasculaires chez deux populations rurales de Roudsar et Azarbaidjan oriental nous avons retrouve 6 cas de P -R court avec QRS normal. Dans cet article nous avons brievement passe en revue les vois de conduction auriculov...