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This work started out with our accidental discovery of a pattern of throughput distributions among links in IEEE 802.11 networks from experimental results. This pattern gives rise to an easy computation method, which we term back-of-the-envelop (BoE) computation, because for many network configurations, very accurate results can be obtained within minutes,(More)
Telomere length (TL) attrition is associated with chronic diseases characterized by chronic inflammatory states. Inflammatory cytokines may play a role in sarcopenia. This study examines the association between TL and the diagnosis of sarcopenia based on appendicular skeletal mass index (ASMI), grip strength, walking speed, and chair stand in a prospective(More)
BACKGROUND To date, few studies address disparities in older populations specifically using frailty as one of the health outcomes and examining the relative contributions of individual and environmental factors to health outcomes. METHODOLOGY/PRINCIPAL FINDINGS Using a data set from a health survey of 4,000 people aged 65 years and over living in all(More)
BACKGROUND Physical function decline is associated with dementia, which might either be mediated by the coexisting sarcopenia or directly related to the impaired cognition. Our objectives are to examine the relationship between cognitive function and performance-based physical function and to test the hypothesis that cognitive function is related to poor(More)
OBJECT Anterior temporal lobe resection plus amygdalohippocampectomy can cause damage to the anterior portion of the optic radiation, also known as the Meyer loop, resulting in homonymous superior quadrantanopia. Magnetic resonance diffusion tensor tractography (DTT) of the Meyer loop can help in surgical planning. In this study, the distance of the(More)
BACKGROUND There has been an increasing prevalence of both depression and chronic medical conditions globally but the relationship between depression and multi-morbidity is not well understood. The aim of the present study was to investigate the relationship between depression, multi-morbidity (number of chronic medical conditions, and measures of(More)
OBJECTIVES This study aimed to examine the association of visual functioning and health-related quality of life (HRQOL) among the older community in Hong Kong. DESIGN This study used the baseline examination of a cohort study MrOs and MsOs (a large study for osteoporosis in men and women). SETTING This study was set in the Hong Kong community. (More)
In contrast to that in the middle-aged, higher body mass index (BMI) in older people is associated with higher survival rates. Yet, BMI makes no distinction between fat elsewhere and abdominal fat, the latter being metabolically more harmful. We hypothesized that overall adiposity might be protective in old age, but that central fat might offset that(More)
Multi-morbidity, dependency, and frailty were studied simultaneously in a community-living cohort of 4,000 men and women aged 65 years and over to examine the independent and combined effects on four health outcomes (mortality, decline in physical function, depression, and polypharmacy). The influence of socioeconomic status on these relationships is also(More)
Data on the association between dietary vitamin K intake and fracture risk are limited among Chinese. This study examined such an association in community-dwelling elderly in Hong Kong. We present data from 2,944 subjects (1,605 men, 1,339 women) who participated in a prospective cohort study. Baseline dietary intakes of energy, protein, calcium, vitamin D,(More)