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PubMed2002

Influenza in Singapore: assessing the burden of illness in the community.

INTRODUCTION: Influenza infection has significant morbidity and mortality. The social and economic costs from work absence in the working population and from hospitalisations in the elderly are considerable. Meta-analyses of cohort and randomised controlled studies indicate that influenza vaccination is effective in preventing respiratory illness, hospitalization, pneumonia and death in 50% to 68% of cases. In Singapore, data on the disease burden from influenza are sparse and no official recommendation on influenza vaccination exists. METHOD: We estimated the disease burden of influenza-like illness (ILI), influenza infection in the general adult population, and hospitalisations and deaths from pneumonia and influenza, from routine official and published sources, and hoc community sample surveys, national virological surveillance, hospitalization and mortality data. RESULTS: In a resident population of 3 million people, there were 4.2 million cases of ILI in a typical non-epidemic year, 3.5 million visits to the doctor and 2.1 million days of work absence due to ILI. Data from the National Influenza Surveillance Programme indicated that about 15% of patients with ILI were positive for influenza isolates. We therefore estimated 630,000 cases of influenza virus infection cases a year, giving rise to 520,000 sick visits and 315,000 days of sick absence from work. About 4200 elderly (65+) persons were hospitalised for pneumonia and influenza, resulting in about 1450 deaths every year. The literature suggests a vaccine efficacy of about 50% of preventing influenza and its complications, including hospitalizations and deaths. This indicates that at least 315,000 cases of influenza virus infection, 258,000 sick visits, and 157,000 lost days from work in the whole population, and 2100 hospitalisations and 600 deaths from pneumonia in the elderly are potentially preventable by vaccination each year. CONCLUSION: Influenza poses a considerable burden of illness in the community and the potential benefits from influenza vaccination are substantial.

Adult↗
PubMed2002

Case report on recombinant coagulation factor VIIa in the treatment of three haemophilia A patients with inhibitors in Singapore.

INTRODUCTION: We report the first experiences with use of recombinant coagulation Factor VIIa (rFVIIa) in the treatment of haemophilia A patients with inhibitors in Singapore and discuss observations in 3 patients. CLINICAL PICTURE: Case 1 bled on two separate occasions into his neck muscles and vocal cord. Case 2 had gross haematuria from bleeding in the renal calyxes. Case 3 bled into the parotid muscles. TREATMENT: rFVIIa in doses, ranging from 50 ug/kg to 90 ug/kg, at different dosing intervals, were used. OUTCOME: Excellent responses were seen in doses of 70 and 90 ug/kg. CONCLUSIONS: rFVIIa is highly effective, both clinically and cost-wise, in the treatment of these patients.

Adult↗
PubMed2002

Health promotion programme in the private workplaces in Singapore: a prevalence survey.

A postal survey was conducted in 4,479 private companies with at least 50 employees in 1998 to determine the prevalence and the scope of workplace health promotion programme in these companies in Singapore. The self-administered questionnaire mailed to the study population covered five areas viz, organisational details, workplace health policies, health promotion and related activities, workplace health facilities and the source of assistance for the programme. The overall response was 49.5%. Parkinson's definition of workplace health promotion was used in the analysis to determine the prevalence of the programme. The data was collated on DBase IV and analysed using SPSS computer programmes. About one third of the respondents covering an estimated 26% of the private sector workforce had a comprehensive workplace health promotion programme as defined by Parkinson. This prevalence was a function of workforce size and industry type. Workplaces with larger workforce size (p<0.001) and those from the manufacturing and human/health service sectors (p<0.001) were more likely to have such programmes compared to their smaller counterparts and other industries respectively. The management remained the main driver behind these programmes. Many of the programmes were centred around health promoting policies and facilities with emphasis on occupational healthl safety and smoking issues. A significant proportion of workplaces surveyed had in place a comprehensive workplace health promotion programme. However, more could still be done to encourage its uptake such as training for facilitators, consultation, grant provision etc. Small workplaces remained an untapped market for such programmes.

Chi-Square Distribution↗
PubMed2002

Pregnancy after renal transplantation: experience in Singapore General Hospital.

INTRODUCTION: Renal transplantation offers the best hope for those women with end-stage renal disease who wish to have children. However, pregnancy after renal transplantation is associated with increased maternal and fetal morbidity. The aim of this retrospective study was to review the outcome of pregnancy in renal transplant patients in Singapore General Hospital. MATERIALS AND METHODS: Forty-two pregnancies, occurring between December 1986 and December 2000, in 25 out of 141 renal transplant women in their reproductive age group (18 to 45 years old) were identified from our high-risk pregnancy record and retrospectively analysed. RESULTS: Thirteen (31%) pregnancies were unsuccessful; 10 abortions, 2 ectopic pregnancies and 1 stillbirth. The remaining 29(69%) successful pregnancies were complicated by maternal anaemia (65.5%), superimposed hypertension (44.8%), premature rupture of membranes (27.6%), urinary (17.2%) and lower genital tract (13.8%) infections, abnormal glucose tolerance test (13.8%), premature delivery (44.8%), low-birth-weight babies (44.8%), small-for-gestational-age babies (20.7%) and intrauterine growth restriction (20.7%). There were no documented cases of multiple pregnancies, congenital anomalies or deterioration of renal function. The outcome of pregnancy was not statistically influenced by preconception renal function and transplant-conception interval. CONCLUSIONS: Successful pregnancy is possible in women after renal transplantation. Such pregnancy is often associated with increased maternal and fetal complications and should be managed by a multidisciplinary approach in a tertiary centre. The function and survival of renal allograft was not adversely affected by pregnancy.

Abortion, Spontaneous↗
PubMed1979

Epidemiology of diarrhoeal diseases in Singapore.

Diarrhoeal diseases in the form of bacterial food poisoning are prevalent in Singapore. Common food poisoning organisms implicated were Staphylococcus aureus, non-thypoid Salmonellae and Vibrio parahaemolyticus. El tor cholera, believed to be introduced through intra-regional trade and travel, occurred sporadically with a common source outbreak, probably food-borne, in September 1978. Shigellosis and amoebiasis were mainly confined to areas where poor personal hygiene was prevalent. The incidence of enteric favers (typhoid and paratyphoid) continued to decline with 39.1% of the cases imported in 1978. Non-bacterial diarrhoeal diseases, including rotavirus, constituted 8--90% of the cases. The emergence of multiple antibiotic resistance enterobacteria which gave rise to occasional outbreaks in institutions, is a matter of concern. Control of diarrhoel diseases is directed mainly at food control and legislation and health education, backed by a high standard of environmental sanitation and a well-established system of epidemiological survelliance. The use of oral rehydration solution for the treatment of diarrhoea is being promoted.

Adolescent↗
PubMed2002

Hepatotoxicity of tuberculosis chemotherapy under general programme conditions in Singapore.

SETTING: The Singapore Tuberculosis (TB) Control Unit, a high volume national referral centre. OBJECTIVES: To determine the incidence, clinical course and outcome of TB drug-induced hepatitis (DH) and the risk factors associated with DH under general programme conditions. DESIGN: A retrospective review of adult patients started on TB treatment in 1998. RESULTS: There were 55 cases of DH in the cohort of 1036 patients treated in 1998. The median time to diagnosis of DH was 38 days. Factors significantly associated with DH were abnormal baseline transaminases/ bilirubin (OR 2.1, 95%CI 1.1-4.3, P = 0.02), age >60 years (OR 1.97, 95%CI 1.14-3.34, P = 0.01) and female sex (OR 1.9, 95%CI 1.07-3.4, P = 0.02). Ethnicity, self-reported alcohol consumption and body weight were not associated with development of DH. All three patients with fatal DH had received pyrazinamide-containing regimens. Treatment was re-introduced in 48 patients and successfully completed in 45 patients. The median time to reinstitution of TB treatment was 23 days. CONCLUSION: The incidence of TB drug-induced hepatitis was 5.3%. Age >60 years, abnormal baseline transaminase/bilirubin levels and female sex were risk factors associated with the development of TB drug-induced hepatitis.

Alanine Transaminase↗
PubMed2002

National disease management plans for key chronic non-communicable diseases in Singapore.

In Singapore, chronic, non-communicable diseases, namely coronary heart disease, stroke and cancer, account for more than 60% of all deaths and a high burden of disability and healthcare expenditure. The burden of these diseases is likely to rise with our rapidly ageing population and changing lifestyles, and will present profound challenges to our healthcare delivery and financing systems over the next 20 to 30 years. The containment and optimal management of these conditions require a strong emphasis on patient education and the development of integrated models of healthcare delivery in place of the present uncoordinated, compartmentalised way of delivering healthcare. To meet these challenges, the Ministry of Health's major thrusts are disease control measures which focus mainly on primary prevention; and disease management, which coordinates the national effort to reduce the incidence of these key diseases and their predisposing factors and to ameliorate their long-term impact by optimising control to reduce mortality, morbidity and complications, and improving functional status through rehabilitation. The key initiatives include restructuring of the public sector healthcare institutions into two clusters, each comprising a network of primary health care polyclinics, regional hospitals and tertiary institutions. The functional integration of these healthcare elements within each cluster under a common senior administrative and professional management, and the development of common clinical IT systems will greatly facilitate the implementation of disease management programmes. Secondly, the Ministry is establishing National Disease Registries in coronary heart disease, cancer, stroke, myopia and kidney failure, which will be valuable sources of clinical and outcomes data. Thirdly, in partnership with expert groups, national committees and professional agencies, the Ministry will produce clinical practice guidelines which will assist doctors and healthcare professionals to better manage important aspects of the key diseases. Finally, the Ministry has committed funds to support selected National Disease Management programmes, illustrated by the disease management plan for asthma.

Chronic Disease↗
PubMed2002

The epidemiology and treatment of anogenital warts in Singapore: a retrospective evaluation.

INTRODUCTION: A retrospective study in the referral centre for sexually transmitted infections (STIs) in Singapore to describe the epidemiology and treatment outcome of patients with anogenital warts. SUBJECTS AND METHODS: We reviewed the case records of 301 patients with anogenital warts who were seen over a 1-year period (1999). We also attempted to interview every patient by telephone to find out if they had any clinical recurrences for which treatment was sought elsewhere. RESULTS: There were 255 males and 46 females with a mean age of 34 years. Two hundred and nineteen (72.8%) presented with symptoms lasting 12 weeks or less. In males, warts occurred most frequently in the preputial cavity (52.5%) and on the penile shaft (40.8%). In females, they occurred most frequently on the external genitalia (91.3%). Two hundred and thirty-five males were treated with cryotherapy and 69% (95% CI, 62.6% to 74.8%) achieved clinical resolution after a mean of 6 treatment cycles. Seven males were treated with podophyllin 0.25% in ethanol and 71% (95% CI, 29.0% to 96.3%) were clinically cured after a mean of 4 treatment cycles. Thirty-nine females were treated with cryotherapy and 67% (95% CI, 49.8% to 80.9%) achieved clinical cure after a mean of 4 treatment cycles. Of the 290 patients treated at the centre, 212 (73%; 95% CI, 67.3% to 77.8%) patients (184 males, 28 females) achieved clinical cure after a mean of 7 weeks (range, 1 to 34 weeks); 90% (95% CI, 86.0% to 93.2%) of them by 15 weeks. Seven-two patients defaulted follow-up and 6 responded partially to treatment. Of the 212 patients who achieved clinical cure, 195 were interviewed by telephone, on an average, 17.7 months after clinical resolution. Thirty-seven (19%; 95% CI, 13.7% to 25.2%), all males, relapsed clinically after a mean of 100 days (range, 5 to 329 days); 90% (95% CI, 84.6% to 93.6%) relapsed by 228 days. CONCLUSIONS: Podophyllin 0.25% in ethanol was the most cost-effective treatment for males. One in 5 patients had a recurrence of their warts and most had their recurrence within 8 months of initial resolution.

Adolescent↗
PubMed2002

Percutaneous nephrolithotomy in the management of complex upper urinary tract calculi: the Singapore General Hospital experience.

INTRODUCTION AND OBJECTIVES: Presently, percutaneous nephrolithotomy (PCNL) is a well-established and effective method of treating upper urinary tract stones at our institution. The aim of this paper was to evaluate a single surgeon's four-year experience of PCNL in the Singapore General Hospital. MATERIALS AND METHODS: Between January 1996 and December 2000, 300 PCNLs were performed on 280 renal units. The mean age was 53.7 years. PCNL was performed on 57 complete staghorn calculi (20.4%), 83 partial staghorn calculi (29.6%), 66 large pelvic calculi (23.6%), 60 impacted uretero-pelvic junction (UPJ) and upper ureteric stones (21.4%) that failed extracorporeal shock wave lithotripsy (ESWL) and 14 symptomatic lower pole calculi (5%). RESULTS: The stone-free rate on discharge was 88.2% (n = 247). At 3 months and 1-year post PCNL, the stone-free rate was 91.1% (n = 255) and 95.7% (n = 268), respectively. The average postoperative stay was 4.5 days. Complications included 1 urosepsis post-PCNL (0.4%) and 2 arterio-venous fistulae (0.7%). Only 1 patient (0.4%) required blood transfusion. Thirty-four patients (12.1%) required ESWL and 4 needed ureteroscopy (1.3%). CONCLUSION: In experienced hands, the use of PCNL for upper urinary tract calculi is safe and effective.

Adult↗
PubMed2002

Mental disorders and public safety of the community at large--does the Tarasoff principle apply in Singapore?

The Tarasoff Principle is a legal ruling arising out of the Tarasoff case in California, in which 2 therapists were found by a court to be negligent for not warning an intended victim of a threat to her by their mentally disordered patient, and she was subsequently killed. The 2 therapists were deemed to have an obligation to protect an intended victim of a patient who presented a serious danger of violence. The question is whether this would apply under Singapore law, and whether an act of disclosure to protect a victim would be a breach of confidentiality and the doctor-patient relationship.

Humans↗
PubMed2002

Prevalence of prostatitis-like symptoms in Singapore: a population-based study.

OBJECTIVE: To study the prevalence of prostatitis-like symptoms in a generally healthy population. SUBJECTS AND METHODS: A population-based cross-sectional survey was conducted in Singapore to evaluate "prostatitis-like symptoms" (PS), lower urinary tract symptoms (LUTS),erectile dysfunction (ED), and quality of life (QoL). Respondents with pain or discomfort in the perineum, testicles, tip of penis or bladder/suprapubic region were identified as having prostatitis-like symptoms. RESULTS: Altogether, 1087 males aged 21 to 70 were evaluated. While at least 20% of them had some degree of LUTS, only 2.67% (29 out of 1087) had pain or discomfort suggestive of prostatitis. Six men had pain in the bladder or suprapubic region, two in the perineum, six at the tip of penis and 26 had pain during micturition (11 subjects had more than one location of pain). Only two men had severe pain while seven had moderate and the rest had mild pain. The mean age of subjects with PS was 43.14. In terms of racial distribution, 2.23% (18) of Chinese, 3.15% (4) of Malay, 4.49% (4) of Indians and 12.12% (3) of other ethnic origin had PS. Those who had PS had worse erectile function (International Index of Erectile Function (IIEF) 11.92 vs. 17.16, p < 0.003) and a worse QoL score (2.96 vs. 1.38, p < 0.001) than those without PS. Those with PS were more bothered and worried about their symptoms. CONCLUSION: The prevalence of prostatitis-like symptoms in a largely Chinese population is 2.67%. Prostatitis-like symptoms have a negative impact on the quality of life and erectile function.

Adult↗
PubMed2002

Gender differences in outcome after an acute myocardial infarction in Singapore.

OBJECTIVES: To characterise gender and age-related differences in presentation and outcome after an acute myocardial infarction (AMI). DESIGN: Data were derived retrospectively from the Singapore Myocardial Infarction Registry from 1988 through 1997. This database comprised all AMI cases for ages between 20 and 64 years (group A). For approximately three months a year, data were also collected for all AMI cases above the age of 64 years (group B). There were 13,048 and 4,425 cases in groups A and B respectively. RESULTS: In age - standardised AMI rates, males outnumbered females by a factor of 4.0 and 1.7 for groups A and B respectively.The median age of presentation was higher in females for both age groups being 58 years versus 54 years for group A and 75 years versus 72 years for group B. Younger females had worse survival at 28 days and were more likely to have prior ischaemic heart disease and require resuscitation. They were also more likely to have atypical symptoms. Previous myocardial infarction was not different between the sexes in both groups. Among the older age group, there was no gender difference in prior ischaemic heart disease, 28-day survival and requirement for resuscitation. CONCLUSION: Women who have AMI tend to be older than men. Gender differences are age-specific. Women who are 64 years and below have more atypical symptoms, prior ischaemic heart disease and worse prognosis than men after AMI. These differences are not seen in those over the age of 64.

Adult↗
PubMed1995

Singapore's "three or more" policy: the first five years.

"Although this article does not attempt a full evaluation of the 'selectively pro-natalist' national population policy of Singapore, it does bring out some indicative findings useful for assessing the effects of the policy on fertility. It finds that, while the new policy has succeeded in increasing the annual number of births, the total fertility rate still remains under two children per woman."

Asia↗
PubMed1987

Psychosocial characteristics of repeat aborters in Singapore.

"The psychosocial characteristics of 200 repeat aborters and 200 first time aborters [among] Singapore Chinese were compared with 200 antenatal patients. The repeat aborters started their sexual activities at an earlier age. They were married for a longer period, had more past pregnencies and more children, but their marital adjustments were slightly less satisfactory. There were no differences in education, housing, and religious practices among the three groups. The aborters knew more methods of contraceptive practices, but they tended to use unreliable methods. Their main reasons for seeking abortion were that their families were complete or that they wished to space births."

Abortion Applicants↗
PubMed1988

Seventeen years of legalized abortion in Singapore.

"In this paper we first discuss the two-stage process of legalizing induced abortion in Singapore, the initial legalization to make it available on a restrictive basis in 1970 and the complete liberalization to make it available on demand from 1975 onwards. The incidence of abortions registered in the last seventeen years and the major characteristics of aborters are analysed. The impact of abortion on the rapid decline of fertility to below-replacement level is highlighted, and the need to reduce abortion by amending the more liberal aspects of the law are considered at the end of the paper."

Abortion, Induced↗
PubMed2002

Prevention and control of non-communicable diseases in Singapore: a review of national health promotion programmes.

The epidemiological transition in Singapore from infectious to chronic, non-communicable diseases created different challenges for our public health system. The population-based strategy is adopted in primary prevention, through the promotion of a healthy lifestyle--smoking cessation, physical activity, eating right and managing stress. Complementing this are measures to detect chronic conditions early through screening and optimal treatment of the disease. While improvements were seen in the common risk factors of smoking and physical inactivity, prevalence of measurable risk factors like hypertension increased between 1992 and 1998. In 2000, the Ministry of Health initiated a series of national disease management plans for major disease conditions affecting Singaporeans. This approach uses a comprehensive and systematic approach to integrate the various components, with identification of responsible parties to ensure successful implementation of initiatives. Chronic diseases will remain prevalent as our society rapidly ages. Close monitoring of our initiatives in disease management will provide information on the long-term efficacy of such strategies.

Chronic Disease↗
PubMed2002

Is postoperative deep vein thrombosis a problem in neurosurgical patients with brain tumours in Singapore?

AIM: To prospectively establish the incidence of deep vein thrombosis (DVT) after cranial procedures in patients with brain tumour in Singapore. METHODOLOGY: Over a period of one year from June 1995 to May 1996, 106 consecutive patients were recruited into the study. All patients undergoing surgery within the period of study were included. Each patient underwent a preoperative and postoperative (on postoperative Day 5 to Day 7) ultrasound examination of the lower limbs to establish the presence of DVT. Prophylaxis was limited to the peri-operative use of elastic stockings on hemiparetic limbs. There were 56 males and 50 females aged between 22 to 86 years (median 45 years). Ethnicity was Chinese, 92% Indian, 6% and other 2%. Ninety percent of the patients were ambulant pre- and post-operatively. No patient had a prior history of DVT. The distribution by pathologic diagnosis was brain metastases, 26% meningioma, 26% glioma, 19% pituitary adenoma, 14% acoustic neuroma, 6% and 9% miscellaneous tumours. RESULTS: DVT was identified in 5/106 patients (4.7%), all of whom had either meningioma or glioma. All five cases occurred in supratentorial tumours. The tumour specific incidence was 7.1% for meningioma and 15% for glioma. 4/5 patients (80%) had pre-existing hemiparesis of the affected limb. No patient developed clinical pulmonary embolism. CONCLUSION: The overall incidence of postoperative DVT in our population, using minimal prophylaxis, was not significantly different from the best results of prospective studies on North American or European patients employing a full regime of prophylaxis. The high-risk groups were similar. Prophylaxis using subcutaneous heparin should be used cautiously in high-risk patients.

Adult↗
PubMed2002

A model for decentralised grey wastewater treatment system in Singapore public housing.

Global concerns over the sustainable use of natural resources provided the impetus for research into water reclamation from wastewater within the Singapore context. The objective of the research is to study and develop a water infrastructure system as an integral element of architecture and the urbanscape, thereby reducing the need for the large area requirements associated with centralised treatment plants. The decentralised plants were considered so as to break up the large contiguous plot of land otherwise needed, into smaller integrated fragments, which can be incorporated within the housing scheme. This liberated more usable space on the ground plane of the urban housing master plan, enabling water-edge and waterscape relationships within both the private and public domains of varying scale.

Facility Design and Construction↗