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Search Results: 1 - 10 of 129895 matches for " Leonard Sheung-Wai Li "
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Stroke Patients with a Past History of Cancer Are at Increased Risk of Recurrent Stroke and Cardiovascular Mortality
Kui-Kai Lau, Yuen-Kwun Wong, Kay-Cheong Teo, Richard Shek-Kwan Chang, Sonny Fong-Kwong Hon, Koon-Ho Chan, Raymond Tak-Fai Cheung, Leonard Sheung-Wai Li, Hung-Fat Tse, Shu-Leong Ho, Chung-Wah Siu
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0088283
Abstract: Background and Purpose Cancer patients are at increased risk of cardiovascular and cerebrovascular events. It is unclear whether cancer confers any additional risk for recurrent stroke or cardiovascular mortality after stroke. Methods This was a single center, observational study of 1,105 consecutive Chinese ischemic stroke patients recruited from a large stroke rehabilitation unit based in Hong Kong. We sought to determine whether patients with cancer are at higher risk of recurrent stroke and cardiovascular mortality. Results Amongst 1,105 patients, 58 patients (5.2%) had cancer, of whom 74% were in remission. After a mean follow-up of 76±18 months, 241 patients developed a recurrent stroke: 22 in patients with cancer (38%, annual incidence 13.94%/year), substantially more than those without cancer (21%, 4.65%/year) (p<0.01). In a Cox regression model, cancer, age and atrial fibrillation were the 3 independent predictors of recurrent stroke with a hazard ratio (HR) of 2.42 (95% confidence interval (CI): 1.54–3.80), 1.01 (1.00–1.03) and 1.35 (1.01–1.82) respectively. Likewise, patients with cancer had a higher cardiovascular mortality compared with those without cancer (4.30%/year vs. 2.35%/year, p = 0.08). In Cox regression analysis, cancer (HR: 2.08, 95% CI: 1.08–4.02), age (HR: 1.04, 95% CI 1.02–1.06), heart failure (HR: 3.06, 95% CI 1.72–5.47) and significant carotid atherosclerosis (HR: 1.55, 95% CI 1.02–2.36) were independent predictors for cardiovascular mortality. Conclusions Stroke patients with a past history of cancer are at increased risk of recurrent stroke and cardiovascular mortality.
Bilateral transtibial amputation with concomitant thoracolumbar vertebral collapse in a Sichuan earthquake survivor
Caroline Wong, Joseph Yu, Sheung-Wai Law, Herman Lau, Cavor Chan
Journal of Orthopaedic Surgery and Research , 2010, DOI: 10.1186/1749-799x-5-43
Abstract: A 7.9 magnitude earthquake struck Sichuan Province of China on 12 May 2008. It was the most damaging natural disaster since the devastating Asian Tsunami of 2004. The earthquake in Sichuan left over 70,000 dead, about 20,000 missing, more than 200,000 injured and almost ten million homeless [1]. The majority of the injured survivors suffered musculoskeletal trauma - often relating to crush injuries - resulting in unilateral, bilateral or even multiple limb amputation, fractures and spinal cord injuries. Long-term and well planned rehabilitation after the acute management is vitally important to maximize their functional states and rebuild their lives [2-4].In view of the great demand for medical care and rehabilitation for these victims, the Chinese Speaking Orthopaedic Society established the "Stand Tall" project with the objective to provide voluntary medical and rehabilitative care to those in need. Its ongoing mission is to facilitate and provide comprehensive rehabilitation services for the Sichuan earthquake amputee victims so they may achieve total rehabilitation and social integration. The organization has the belief that all the amputee victims can "Stand Tall" again with self-respect, confidence and social fulfillment [5].The first operation by the "Stand Tall" program was commenced on 7 June 2008. In less than a month, more than 150 medical professionals were recruited. They included orthopaedic surgeons, nurses, physiotherapists, occupational therapists, and prosthetic and orthotic professionals. The Society collaborated with various Guangdong and Sichuan hospitals to provide an individualized rehabilitation plan and prosthetic fitting for each patient.In the following article, the authors present a case report of a traumatic bilateral transtibial amputee with concomitant thoracolumbar vertebral collapse in the aftermath of the earthquake, outlining the therapeutic and rehabilitation process.The patient, a 14-year-old girl living with her family in Sichu
Characteristics of metal enrichment in Deep Bay,Hong Kong
Characteristics of metal enrichment in Deep Bay, Hong Kong

LIU Wen-xin,LI Xiang-dong,LI Yok-sheung,WAI Wing-hong Onyx,OWHWai,
LIU Wen-xin
,LI Xiang-dong,LI Yok-sheung,WAI Wing-hong Onyx,O.W.H. Wai

环境科学学报(英文版) , 2004,
Abstract: Abstract: Sediment cores, suspended particles and overlying water were collected in Deep Bay, Hong Kong. Enrichment of Zn in surface sediments in the landward direction and the decreasing of exchangeable Cd, Ni and Zn in sediment from the inner bay to the outer bay indicated the influence of anthropogenic pollutants discharged from the riparian runoffs.;Sediment cores, suspended particles and overlying water were collected in Deep Bay, Hong Kong. Enrichment of Zn in surface sediments in the landward direction and the decreasing of exchangeable Cd, Ni and Zn in sediment from the inner bay to the outer bay indicated the influence of anthropogenic pollutants discharged from the riparian runoffs.
The Optimal Level and Impact of Internal Factors on Growth  [PDF]
Kui-Wai Li
Modern Economy (ME) , 2011, DOI: 10.4236/me.2011.23024
Abstract: This paper empirically uses data from the world economy to show that performance of domestic factors are equally important to external factors when comes to growth. Various external and domestic factors are used to construct two separate indices and the principal component method is applied in the analysis. The empiri- cal results show that given a different level of performance in the economy’s external factors, a higher per- formance in the internal factors will produce a higher growth rate. When the performance of an economy’s internal factors is extremely low, it would be appropriate for that economy first to improve its internal factors.
Statistical characteristics of chlorophyll-a concentration in Hong Kong's coastal waters

CHEN Xiaoling,Yok Sheung Li,LI Zhilin,

地理学报 , 2002,
Abstract: In this paper seven of the ten Water Control Zones (WCZs) in Hong Kong's coastal waters with monthly or bi-weekly sampling data of 17 parameters collected at 37 monitoring stations from 1988 to 1999 were selected to analyze the spatial and temporal variations of chlorophyll-a and its influencing factors. Cluster analysis was employed to group the monitoring stations based on the structure of the data set. Multiple step regression was employed to determine the significant influencing factors of chlorophyll-a level. The results suggest that all the monitoring stations could be grouped into two clusters. Cluster I with frequent red tide incidents comprises two WCZs which are semi-enclosed bays. Cluster II with less red tide occurrence comprises the other five WCZs in an estuarine environment in the west. For both clusters, the organic contents indicator, BOD5, was a common significant influencing factor of the chlorophyll-a level. Nitrogen and light penetration condition related to turbidity, total volatile solids and suspended solids had more influence on the cholophyll-a level in Cluster I than in Cluster II, while phosphorus and oceanographic conditions associated with salinity, temperature, dissolved oxygen and pH were more important in Cluster II than in Cluster I. Generally, there was a higher average chlorophyll-a level in winter and autumn in a year. The chlorophyll-a level was much higher in Cluster I than in Cluster II among all seasons. Although the chlorophyll-a concentration had great variations from place to place in Hong Kong's coastal waters, it seemed to have a common long term fluctuation period of 8-10 years with a high-low-high variation in the period in the whole region, which might be influenced by other factors of global scale.
The Stressors and Psychological Well-Being of Lesbian, Gay and Bisexual among Chinese Adults in Hong Kong  [PDF]
Lai Sheung Winnie Cheng
Journal of Biosciences and Medicines (JBM) , 2019, DOI: 10.4236/jbm.2019.75010
Abstract:
Background: Lesbian, Gay and Bisexual (LGB) are individuals who often experienced stigma and discrimination which has detrimental effects on psychological well-being. Objectives: This study aimed to identify the major stressors and psychological well-being of LGB among Chinese adults in Hong Kong. Methods: A cross-sectional study was employed using self-administered questionnaires. Convenience sampling was used to recruit subjects. Demographic information, Measure of Gay-related stress (MOGS) and The Center for Epidemiologic Studies Depression Scale (CES-D Scale) were used to collect data. Results: The major stressor among LGB individuals in Hong Kong was family reaction. Majority of them had a high level of depression. Conclusion: LGB individuals in Hong Kong experienced high level of depression.
Supportive care needs and health-related quality of life among Chinese lung cancer survivors  [PDF]
Dorothy Ngo-Sheung Chan, Kai-Chow Choi, Carmen Wing-Han Chan, Rayman Wai-Man Wan, Suzanne So-Shan Mak, Eliza Mi-Ling Wong, Sek-Ying Chair, Winnie Kwok-Wei So
Advances in Lung Cancer (ALC) , 2012, DOI: 10.4236/alc.2012.12002
Abstract: Purpose: The purpose of this study was to explore the supportive care needs and health-related quality of life (HRQoL) of lung cancer survivors, and to identify the association between patient characteristics, HRQoL and supportive care needs. Method: This was a sub-study of a larger scale survey of cancer survivors’ supportive care needs. A total of 48 lung cancer survivors were recruited from a regional teaching hospital, and a three-part structured questionnaire was used to collect 1) socio-demographic and clinical characteristics, 2) supportive care needs and 3) health-related quality of life data. Results: The three most commonly reported unmet needs were all in the health-system information domain: 1) being informed about your results as soon as possible (58%), 2) being informed about cancer which is under control or diminishing (50%), and 3) being informed about things you can do to help yourself get well (46%). The second most common unmet need domain was access to healthcare and ancillary support services. The survivors generally reported satisfactory HRQoL. However, household income and unmet physical and psychological needs were independently associated with HRQoL among these survivors. Conclusion: The high unmet needs in the health-system information area call for a review of the content and amount of information provided to lung cancer survivors. In addition, more attention should be given to lung cancer survivors with low incomes but high physical and psychological unmet needs, who require appropriate follow-up and long-term care of a physical, social and psychological kind.
The black-and-white coloring problem on circle graphs
Ton Kloks,Sheung-Hung Poon,Yue-Li Wang
Computer Science , 2012,
Abstract: Given a graph G and integers b and w. The black-and-white coloring problem asks if there exist disjoint sets of vertices B and W with |B|=b and |W|=w such that no two vertices x in B and y in W are adjacent. In this paper we show that the problem is polynomial when restricted to permutation graphs and, more generally, to circle graphs.
A Method for Calculating the Heats of Formation of Medium-Sized and Large-Sized Molecules  [PDF]
Bing He, Hongwei Zhou, Fan Yang, Wai-Kee Li
Open Journal of Physical Chemistry (OJPC) , 2015, DOI: 10.4236/ojpc.2015.53008
Abstract: A calculation method for heats of formation (HOF, referred to as △Hf) based on the density functional theory (DFT) is presented in this work. Similar to Gaussian-3 theory, the atomic scheme is applied to calculate the heats of formation of the molecules. In this method, we have modified the formula for calculation of Gaussian-3 theory in several ways, including the correction for diffuse functions and the correction for higher polarization functions. These corrections are found to be significant. The average absolute deviation from experiment for the 164 calculated heats of formation is about 1.9 kcal·mol?1, while average absolute deviation from G3MP2 for the 149 (among the 164 molecules, 15 large-sized molecules can not be calculated at the G3MP2 level) calculated heats of formation is only about 1.9 kcal·mol?1. It indicates that the present method can be applied to predict the heats of formation of medium-sized and large-sized molecules, while the heats of formation of these molecules using Gaussian-3 theory are much difficult, even impossible, to calculate. That is, this method provides a choice in the calculation of Hf for medium-sized and large-sized molecules.
An Uncommon Potentially Fatal Complication in a Patient without Predisposing Factor Following Oral Bowel Preparation Commonly Used for Colonoscopy  [PDF]
Iris Wai Sum Li, Ling Pong Leung, Sik Hon Tsui
Open Journal of Emergency Medicine (OJEM) , 2016, DOI: 10.4236/ojem.2016.41002
Abstract: We described the case report of a patient presented with no known predisposing factor, generalized malaise with vomiting, locked jaw, perioral paraesthesia, carpopedal spasm and a positive Chvostek’s sign which resulted from severe electrolyte disturbance at 5 hours after use of oral sodium phosphate solution (NaPO4) as bowel preparation for colonoscopy. On presentation, she developed hyperphosphatemia and symptomatic hypocalcaemia with serum phosphate of 1.84 mmol/L and adjusted calcium level 1.67 mmol/L respectively. Her symptoms subsided after immediate intravenous calcium gluconate followed by oral calcium supplement. The electrolyte disturbances were normalized with an uneventful clinical course. The potentially fatal complications of sodium phosphate solution which commonly prescribed as bowel preparation for conventional colonoscopy could develop though previously reported as uncommon in patients without predisposing factors, and should not be overlooked. Urgent assessment and immediate correction of electrolyte disturbances are needed. Recommendations on patient selection of use of sodium phosphate to minimize risk of developing adverse events are needed to incorporate in clinical protocols.
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