2.Research on psychoneuroimmunology: does stress influence immunity and cause coronary artery disease?
Roger C M HO ; Li Fang NEO ; Anna N C CHUA ; Alicia A C CHEAK ; Anselm MAK
Annals of the Academy of Medicine, Singapore 2010;39(3):191-196
This review addresses the importance of psychoneuroimmunology (PNI) studies in understanding the role of acute and chronic psychological stressors on the immune system and development of coronary artery disease (CAD). Firstly, it illustrates how psychological stressors change endothelial function and lead to chemotaxis. Secondly, acute psychological stressors lead to leukocytosis, increased natural killer cell cytotoxicity and reduced proliferative response to mitogens while chronic psychological stressors may lead to adverse health effects. This will result in changes in cardiovascular function and development of CAD. Thirdly, acute and chronic psychological stressors will increase haemostatic factors and acute phase proteins, possibly leading to thrombus formation and myocardial infarction. The evidence for the effects of acute and chronic psychological stress on the onset and progression of CAD is consistent and convincing. This paper also highlights potential research areas and implications of early detection of immunological changes and cardiovascular risk in people under high psychological stress.
Acute-Phase Proteins
;
Coronary Artery Disease
;
immunology
;
psychology
;
Humans
;
Inflammation
;
psychology
;
Myocardial Infarction
;
immunology
;
psychology
;
Stress, Psychological
;
immunology
;
Thrombosis
;
immunology
;
psychology
3.Prevalence, awareness, treatment and control of hypertension in population older than 15 years of age in Beijing, 2013-2014.
C X WANG ; X G WU ; H J LIU ; S C GUAN ; C B HOU ; H H LI ; X GU ; Z Y ZHANG ; X H FANG
Chinese Journal of Epidemiology 2018;39(2):179-183
Objective: To investigate the rates on prevalence, awareness, treatment and control of hypertension in population older than 15 years of age in Beijing, 2013-2014. Methods: A cross-sectional survey was conducted in Beijing between 2013-2014. Stratified multistage random sampling method was used to select representative sample of 13 057 Chinese individuals aged over 15 years, from the general population. Blood pressure was measured for three readings at sitting position after resting for at least five minutes with an average reading recorded. A standardized structured questionnaire was developed to collect history of hypertension and antihypertensive treatment. Results: A total of 4 663 community residents aged over 15 years were hypertensive among the 13 057 individuals, with the standardized prevalence rate as 32.7%, in Beijing area. The age-standardized prevalence rates of hypertension appeared 34.6% in men and 30.8% in women. The age-and sexstandardized prevalence of hypertension rates were 33.3% in urban and 24.6% in rural areas. The prevalence of hypertension increased with age and appeared higher in men than in women, in urban than in rural residents. Among the hypertensive patients, rates of awareness, treatment and control were 66.8%, 64.6% and 31.6%, respectively. Conclusion: High prevalence of hypertension with low rates on awareness and treatment and control, appeared in the general population of Beijing. Related strategies should be developed regarding prevention, control and management of hypertension, to reduce the burden of this disease.
Adolescent
;
Adult
;
Age Distribution
;
Aged
;
Antihypertensive Agents/therapeutic use*
;
Asian People/statistics & numerical data*
;
Awareness
;
Blood Pressure
;
Blood Pressure Determination
;
China/epidemiology*
;
Cross-Sectional Studies
;
Female
;
Health Knowledge, Attitudes, Practice
;
Humans
;
Hypertension/epidemiology*
;
Male
;
Middle Aged
;
Prevalence
;
Rural Population
;
Sex Distribution
;
Surveys and Questionnaires
;
Urban Population
;
Young Adult
4.SARS in Singapore--predictors of disease severity.
Hoe-Nam LEONG ; Arul EARNEST ; Hong-Huay LIM ; Chee-Fang CHIN ; Colin S H TAN ; Mark E PUHAINDRAN ; Alex C H TAN ; Mark I C CHEN ; Yee-Sin LEO
Annals of the Academy of Medicine, Singapore 2006;35(5):326-331
INTRODUCTIONSevere acute respiratory syndrome (SARS) affected 8096 individuals in 29 countries, with 774 deaths. In Singapore, there were 238 cases of SARS with 33 deaths. A retrospective analysis was performed to identify predictors of poor outcome in patients with SARS locally.
MATERIALS AND METHODSClinical, laboratory and outcome data of 234 patients admitted to Tan Tock Seng Hospital and Singapore General Hospital were collected and analysed. Only data collected at the time of admission were used in the analysis for predictors of poor outcome. Adverse events were defined as admission to the intensive care unit or death.
RESULTSClinical (temperature, FiO2) and laboratory [leukocyte, lymphocyte, neutrophil, platelet, lactate dehydrogenase (LDH), albumin] trends in groups with and without an adversarial event were presented. Fifty patients experienced an adverse event. On univariate analysis, male gender, advanced age, presence of comorbidities, neutrophilia, lymphopaenia, hyponatraemia, hypoalbuminaemia, transaminitis and elevated LDH or C-reactive protein were found to be significant predictors. On multivariate analysis, predictors of poor outcome were increased age [odds ratio (OR) 1.73 for every 10-year increase; 95% CI, 1.35 to 2.21], neutrophilia (OR 1.06 for every 1 x 10(9)/L increase; 95% CI, 1.02 to 1.11) and high LDH (OR 1.17 for every 100 U/L increase; 95% CI, 1.02 to 1.34). None of the 12 paediatric patients had an adverse event.
CONCLUSIONAdvanced age, neutrophilia and high LDH predict poor outcomes in patients with SARS.
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Antibodies, Viral ; analysis ; Child ; Child, Preschool ; DNA, Viral ; analysis ; Female ; Fluorescent Antibody Technique ; Humans ; Incidence ; Infant ; Male ; Middle Aged ; Retrospective Studies ; Reverse Transcriptase Polymerase Chain Reaction ; SARS Virus ; genetics ; immunology ; Severe Acute Respiratory Syndrome ; epidemiology ; virology ; Severity of Illness Index ; Singapore ; epidemiology ; Survival Rate
5.Impact of Age on Clinicopathological Features and Survival of Patients with Noncardia Gastric Adenocarcinoma.
Marita C BAUTISTA ; Sheng Fang JIANG ; Mary Anne ARMSTRONG ; Debbie POSTLETHWAITE ; Dan LI
Journal of Gastric Cancer 2014;14(4):238-245
PURPOSE: Gastric cancer often occurs in the elderly but is uncommon in young individuals. Whether young patients have different clinical behaviors and outcomes from those of older patients remain unclear. MATERIALS AND METHODS: We identified 1,366 cases of newly diagnosed noncardia gastric adenocarcinoma from the Kaiser Permanente Northern California Cancer Registry between 2000 and 2010. We then compared the clinicopathological features and survival among the different age groups. RESULTS: The male : female ratio differed significantly between the younger and older patient groups (0.84 in age <50 years vs. 1.52>60 years, P<0.01). More younger patients were Hispanic (54% patients <40 years vs. 19% patients > or =70 years, P<0.0001), while more older patients were Caucasian (49% patients > or =70 years vs. 15% patients <40 years; P<0.0001). The diffuse/mixed histological type was more prevalent in younger patients (70% patients <40 years vs. 27% patients > or =70 years; P<0.0001), whereas the intestinal type was more frequent in older patients (71% in patients > or =70 years vs. 30% in patients <40 years; P<0.0001). Poorly differentiated adenocarcinoma was more common in the younger patients (80% in patients <40 years vs. 60% in patients > or =70 years; P=0.016). Survival rates at 1, 2, and 5 years gradually declined with increasing age (overall P=0.0002). CONCLUSIONS: Young patients with gastric cancer had more aggressive disease but higher overall survival rates than older patients. Younger Hispanic patients and older Caucasian patients were more likely to be diagnosed with gastric cancer. These differences may be due to biological predisposition and/or environmental exposure.
Adenocarcinoma*
;
Aged
;
California
;
Environmental Exposure
;
Ethnic Groups
;
Female
;
Hispanic Americans
;
Humans
;
Male
;
Outcome Assessment (Health Care)
;
Stomach Neoplasms
;
Survival Rate
6.Relapse risk assessment of transplantation for patients with chronic myeloid leukaemia.
Ya FANG ; Alois GRATWOHL ; Hans C van HOUWELINGEN
Chinese Medical Journal 2003;116(2):305-308
OBJECTIVETo analyse the risk factors of relapse before bone marrow transplantation (BMT) and to present the prognostic information as good as possible.
METHODSA total of 3142 patients, who underwent the allogeneic blood or bone marrow transplantation between 1989 and 1997 and were documented in the European Group for Blood and Marrow transplantation (EBMT), were included. Six possible risk factors including type of donor, stage of disease, age, gender, donor-recipient sex combination and the waiting time from diagnosis to transplantation of relapse were considered. The time to relapse was analysed by Kaplan-Meier curves and Cox regression with stratification on prognostic factors that did not satisfy the Proportional Hazard Assumption.
RESULTSAn amount of 447 patients relapsed out of all 3142 patients. The relapse rate was 14.2%. Type of donor and stage of disease showed a clear prognostic effect, but failed the proportional hazard assumption. Therefore, the data were stratified on the combination of type of donor and stage of disease. Within these strata an additional significant effect of age could be observed. Relative risk of age > or = 40 vs age < 40 was 1.32 (95% confidence interval 1.09 - 1.59). The prognostic model is summarized graphically.
CONCLUSIONSThe combination of type of donor, stage of disease and age of recipient at transplantation are important prognostic factors for relapse after BMT.
Adult ; Age Factors ; Aged ; Bone Marrow Transplantation ; Female ; Histocompatibility Testing ; Humans ; Leukemia, Myelogenous, Chronic, BCR-ABL Positive ; pathology ; therapy ; Male ; Middle Aged ; Neoplasm Staging ; Prognosis ; Recurrence ; Risk Assessment ; Risk Factors
7.Killer Ig-like receptor gene content diversity and haplotype analysis in Chinese Han population in Shanghai.
Lei ZHANG ; Katharine C HSU ; Xiao-Rong LIU ; Jue-qin YANG ; Fang-juan YAO ; Ling-di XU ; Bo DUPONT ; Li-an FAN
Chinese Journal of Medical Genetics 2003;20(5):396-399
OBJECTIVETo detect the diversity of killer Ig-like receptor(KIR) gene content and the combination of haplotypes in Chinese Han population in Shanghai area.
METHODSDNA samples from 87 randomly unrelated healthy individuals in Shanghai Han population were genotyped with SSP/PCR method.
RESULTS(1) Frequencies of KIR genes: All of 18 known KIRs genes, such as 2DL1-5, 2DS1-5, 3DL1-3, 3DS1, KIR1D and the pseudogenes X, Xv and Z(KIR2DP1) were observed in Shanghai Hans. All individuals contain 3DL3, 2DL4, 3DL2 and 3DL1; the most common genes were 2DL3, Z, 2DL1 and X; the following were 2DS4, 1D, 2DL5, 2DS1, 3DS1 and 2DS5; the next were 2DS2, 2DL2, 2DS3 and Xv. (2) Frequencies of KIR gene haplotypes; there were 13 haplotypes detected in 87 Han individuals, among them, the most frequent one was type 2 (haplotypeA-2DS4). (3) Frequencies of KIR genotypes: 18 kinds of the combinations of the haplotypes were observed; the most frequent ones were AJ(2,2), AF (1,2). Also, In this study were identified five new genotypes FZ1 2 9 , FZ2 1 16 , FZ3 6 17 , FZ4 4 13 and FZ5 2 6 ,which had not been observed in Caucasians so far.
CONCLUSIONThese findings suggest that there are distinctive frequencies of KIR gene content, haplotype as well as genotype in Chinese Han population in Shanghai area.
China ; Gene Frequency ; Genetic Variation ; Genotype ; Haplotypes ; genetics ; Humans ; Receptors, Immunologic ; genetics ; Receptors, KIR ; Receptors, KIR2DL1 ; Receptors, KIR2DL3 ; Receptors, KIR2DL4 ; Receptors, KIR3DL1 ; Receptors, KIR3DL2 ; Receptors, KIR3DS1
8.Fasting during Ramadan and Associated Changes in Glycaemia, Caloric Intake and Body Composition with Gender Differences in Singapore.
Ester C K YEOH ; Sueziani Binte ZAINUDIN ; Win Nie LOH ; Chin Lian CHUA ; Sharon FUN ; Tavintharan SUBRAMANIAM ; Chee Fang SUM ; Su Chi LIM
Annals of the Academy of Medicine, Singapore 2015;44(6):202-206
INTRODUCTIONMillions of Muslim patients with diabetes mellitus (DM) fast during Ramadan. However, little is known about the metabolic impact of Ramadan fasting. We aimed to study the changes in body composition and metabolic profile in this group of patients.
MATERIALS AND METHODSWe studied 29 Southeast Asian Muslim patients with type 2 diabetes; all underwent pre-Ramadan education. Study variables were weight change, body composition (using multifrequency bioimpedance method, InBody S20®, Biospace, South Korea), blood pressure (BP), glycated haemoglobin (HbA1c), fasting lipid profile, and caloric intake assessment using FoodWorks® nutrient analysis software.
RESULTSTwenty-three subjects fasted ≥15 days; mean ± SD: 57 ± 11 years; 52% were males. HbA1c improved significantly (8.6 ± 2.4% pre-Ramadan vs 8.0 ± 2.3% end-Ramadan, P = 0.017). Despite similar body weight, there was reduction in body fat mass (BFM) (30.9 ± 11 kg vs 29.2 ± 12.2 kg, P = 0.013). Multivariate analysis suggested that the reduction in HbA1c was attributed by reduction in BFM (β = -0.196, P = 0.034). There was no change in visceral adiposity (visceral fat area (VFA)) but stratification by gender showed a reduction amongst females (137.6 ± 24.5 cm2 to 132.5 ± 25.7 cm2, P = 0.017). These changes occurred despite similar total caloric intake (1473.9 ± 565.4 kcal vs 1473.1 ± 460.4 kcal, P = 0.995), and proportion of carbohydrate (55.4 ± 6.3% vs 53.3 ± 7.5%, P = 0.25) and protein intake (17.6 ± 4.1% vs 17.3 ± 5.4%, P = 0.792), before and during Ramadan respectively, but with increased proportion of fat intake (11.9 ± 2.4% vs 13 ± 11.7%, P = 0.04). Seven out of 23 patients had medications adjusted to avert symptomatic hypoglycaemia but none of the patients developed severe hypoglycaemia.
CONCLUSIONRamadan fasting can be practiced safely with prior patient education and medication adjustment. It also confers modest benefits on metabolic profile and body composition, especially among females.
Adult ; Aged ; Biomarkers ; blood ; Blood Glucose ; metabolism ; Body Composition ; Body Mass Index ; Diabetes Mellitus, Type 2 ; blood ; physiopathology ; Energy Intake ; Fasting ; physiology ; Female ; Glycated Hemoglobin A ; metabolism ; Holidays ; Humans ; Islam ; Male ; Middle Aged ; Multivariate Analysis ; Prospective Studies ; Sex Factors ; Singapore ; Weight Gain ; Weight Loss
9.Safety and effectiveness of improving carbapenem use via prospective review and feedback in a multidisciplinary antimicrobial stewardship programme.
Christine B TENG ; Tat Ming NG ; Michelle W TAN ; Sock Hoon TAN ; Mindy TAY ; Shu Fang LIM ; Li Min LING ; Brenda S ANG ; David C LYE
Annals of the Academy of Medicine, Singapore 2015;44(1):19-25
INTRODUCTIONAntimicrobial stewardship programmes (ASP) can reduce antibiotic use but patient safety concerns exist. We evaluated the safety of prospective carbapenem review and feedback and its impact on carbapenem use and patient outcomes.
MATERIALS AND METHODSAfter 3 months implementation of our ASP, we compared patients with and without acceptance of ASP recommendations on the use of carbapenems. Primary outcome was 30-day mortality. Secondary outcomes included duration of carbapenem use, length of hospitalisation, clinical response, microbiological clearance, 30-day readmission and mortality at discharge.
RESULTSOf 226 recommendations for 183 patients, 59.3% was accepted. De-escalation, switching to oral antibiotics and antibiotic cessation comprised 72% of recommendations. Patients with acceptance of ASP recommendations had lower 30-day mortality and higher end-of-therapy clinical response despite shorter carbapenem duration (P <0.05). Predictors of 30-day mortality were Pitt bacteraemia score (adjusted odds ratio [aOR] 1.39, 95% confidence interval [CI], 1.11 to 1.74; P = 0.004) and non-acceptance of ASP recommendations (aOR 2.84, 95% CI, 1.21 to 6.64; P = 0.016).
CONCLUSIONOur prospective carbapenem review and feedback mainly comprising of reducing carbapenem use is safe.
Carbapenems ; therapeutic use ; Drug Utilization ; standards ; Feedback ; Guideline Adherence ; statistics & numerical data ; Humans ; Patient Safety ; Pharmaceutical Services ; Treatment Outcome
10.The Singapore Heart Failure Risk Score: Prediction of Survival in Southeast Asian Patients.
Jonathan YAP ; Shaw Yang CHIA ; Fang Yi LIM ; John C ALLEN ; Louis TEO ; David SIM ; Yun Yun GO ; Fazlur Rehman JAUFEERALLY ; Matthew SEOW ; Bernard KWOK ; Reginald LIEW ; Carolyn Sp LAM ; Chi Keong CHING
Annals of the Academy of Medicine, Singapore 2019;48(3):86-94
INTRODUCTION:
Numerous heart failure risk scores have been developed but there is none for Asians. We aimed to develop a risk calculator, the Singapore Heart Failure Risk Score, to predict 1- and 2-year survival in Southeast Asian patients hospitalised for heart failure.
MATERIALS AND METHODS:
Consecutive patients admitted for heart failure were identified from the Singapore Cardiac Databank Heart Failure registry. The follow-up was 2 to 4 years and mortality was obtained from national registries.
RESULTS:
The derivation (2008-2009) and 2 validation cohorts (2008-2009, 2013) included 1392, 729 and 804 patients, respectively. Ten variables were ultimately included in the risk model: age, prior myocardial infarction, prior stroke, atrial fibrillation, peripheral vascular disease, systolic blood pressure, QRS duration, ejection fraction and creatinine and sodium levels. In the derivation cohort, predicted 1- and 2-year survival was 79.1% and 68.1% compared to actual 1- and 2-year survival of 78.2% and 67.9%. There was good agreement between the predicted and observed mortality rates (Hosmer-Lemeshow statistic = 14.36, = 0.073). C-statistics for 2-year mortality in the derivation and validation cohorts were 0.73 (95% CI, 0.70-0.75) and 0.68 (95% CI, 0.64-0.72), respectively.
CONCLUSION
We provided a risk score based on readily available clinical characteristics to predict 1- and 2-year survival in Southeast Asian patients hospitalised for heart failure via a simple online risk calculator, the Singapore Heart Failure Risk Score.