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Trends and ethnic differences in hospital admissions and mortality for congestive heart failure in the elderly in Singapore, 1991 to 1998

Ng TP, Niti M

Heart, 2003 Aug;89(8):865-70.
PMID: 12860859

To describe trends in hospital admissions and mortality from congestive heart failure in the elderly population aged 65 years and over in Singapore, 1991 to 1998.

Matched MeSH terms: India/ethnology
Hip fracture incidence rates in Singapore 1991-1998

Koh LK, Saw SM, Lee JJ, Leong KH, Lee J, National Working Committee on Osteoporosis

Osteoporos Int, 2001;12(4):311-8.
PMID: 11420781

In this population-based study, we determined the incidence rates of hip fracture among Singapore residents aged 50 years and above. Information was obtained from a centralized database system which captured admissions with the primary diagnosis of a closed hip fracture (ICD-9 codes 820, 820.0, 820.2 and 820.8, n = 12,927) from all health care establishments in the country from 1991 to 1998 inclusive. After removing duplicates, hospital transfers, readmissions and non-acute care admissions, the total number of hip fractures was 9406. Based on the national population census 1990 (n = 464,100) and yearly population estimates, the age-adjusted hip fracture rates for 1991-1998 (per 100,000) were 152 in men and 402 in women. This was 1.5 and over 5 times higher than corresponding rates in the 1960s. From 1991 to 1998, these hip fracture rates tended to increase by 0.7% annually in men and by 1.2% annually in women. Among the three major racial groups, in men, the Chinese had significantly higher age-adjusted hip fracture rates (per 100,000): 168 (95% confidence interval (CI) 158-178) compared with 128 (95% CI 105-152) for Indians and 71 (95% CI 54-88) for Malays. A similar pattern occurred in women: 410 (95% CI 395-425), for Chinese compared with 361 (95% CI 290-432) for Indians and 264 (95% CI 225-303) for Malays. Since the 1960s, the main increases in hip fracture rates have been seen in the Chinese and Malays, with the rates in Indians appearing to decrease. Hip fracture incidence rates in Singapore have risen rapidly over the past 30-40 years, particularly in women, and are now among the highest in Asia. Significant racial differences in hip fracture rates occur within the same community. Time trends in hip fracture rates differed between races.

Matched MeSH terms: India/ethnology
Blood lead levels of a population group not occupationally exposed to lead in Singapore

Neo KS, Goh KT, Sam CT

Southeast Asian J. Trop. Med. Public Health, 2000 Jun;31(2):295-300.
PMID: 11127329

A survey was conducted between 1995 and 1997 to assess the impact of introduction of unleaded petrol and other public health measures on the blood lead level of the population. The geometric mean blood lead level of 269 government employees as determined by graphite furnace atomic absorption spectroscopy, was 66.0 microg/l, much lower than that recorded before introduction of lead-free petrol. Using multiple regression analysis, factors significantly associated with blood lead levels were: exposure to traffic, age (>50 years) and active smoking. Passive smoking, exposure to recent paint work, consumption of alcohol and traditional medicine were found not to be significantly associated with the blood lead level.

Matched MeSH terms: India/ethnology
Fulltext Temporal trends and ethnic variations in asthma mortality in Singapore, 1976-1995

Ng TP, Tan WC

Thorax, 1999 Nov;54(11):990-4.
PMID: 10525557

BACKGROUND: A study was undertaken to examine temporal trends and ethnic differences in the asthma mortality rate in Singapore.
METHODS: Asthma mortality rates in Singapore were estimated from vital data for the years from 1976 to 1995. Trends in sex and age specific (5-14, 15-34, 35-59, 60+ years) rates were obtained for four periods (1976-80, 1981-85, 1986-90, 1991-95) and for Chinese, Malay, and Indian subjects for the years when these data were available (1989-95).
RESULTS: An increase in asthma mortality was observed in children aged 5-14 years from 0.21 per 100,000 person years in 1976-80 to 0.72 per 100,000 person years in 1991-95. No increases were noted in the other age groups but a small decrease was observed in the 1991-95 period for the 35-59 year age group. Marked ethnic differences in mortality rates were observed. In the group aged 5-34 years the asthma mortality rates were 0.5 per 100,000 in Chinese subjects, 1.3 per 100,000 in Indians, and 2.5 per 100,000 in Malay subjects. Similar 2-4 fold differences were observed in all other age groups.
CONCLUSIONS: Apart from genetic factors, environmental exposures and medical care factors which influence asthma prevalence and severity are most likely to be the causes of the observed temporal trends and ethnic differences in the asthma mortality rate in Singapore, but further studies are needed to elucidate these more fully.

Matched MeSH terms: India/ethnology
Does education explain ethnic differences in myopia prevalence? A population-based study of young adult males in Singapore

Wu HM, Seet B, Yap EP, Saw SM, Lim TH, Chia KS

Optom Vis Sci, 2001 Apr;78(4):234-9.
PMID: 11349931

PURPOSE: To study interethnic variation in myopia prevalence and severity in young adult males in Singapore and to determine whether these variations are related to differences in education level.
METHODS: A population-based survey of refractive errors in a cohort of 15,095 military conscripts between July 1996 and June 1997 using noncycloplegic autorefraction and a standard questionnaire. Prevalence rates of myopia (

Matched MeSH terms: India/ethnology
Pattern of suicide: a review of autopsies conducted at the University Hospital, Kuala Lumpur

Nadesan K

Malays J Pathol, 1999 Dec;21(2):95-9.
PMID: 11068413

Suicide is one of the ten leading causes of death in the world, accounting for more than 400,000 deaths annually. The pattern of suicide and the incidence of suicide vary from country to country. Cultural, religious and social values play some role in suicide. Compared to the West and some of the countries in the Asian region the incidence of suicide is low in Malaysia. A three-year retrospective study of all the autopsies performed at the University Hospital, Kuala Lumpur was analysed and the cases that were definitely determined as suicides were further studied. 48.8% of all suicides were ethnic Indians though Indians formed only 8% of the Malaysian population. 38.1% of suicides were Chinese who formed 26% of the population while only 3.6% were Malays, who formed 59% of the population. The preferred methods of suicide were poisoning and hanging. The majority were in the age group 20-40 yr. The study may have missed some cases that would have been wrongly concluded as accidental deaths and a few others where the police would have released the bodies without postmortem examinations.

Matched MeSH terms: India/ethnology
Febrile convulsions: acute seizure characteristics and anti-convulsant therapy

Ling SG

Ann Trop Paediatr, 2000 Sep;20(3):227-30.
PMID: 11064777 DOI: 10.1080/02724936.2000.11748139

A descriptive study using data from the medical records of 448 children with febrile convulsion was carried out to determine the seizure characteristics and use of anti-convulsant therapy for febrile convulsions in a Malaysian hospital. There was a higher incidence of multiple seizures and a lower incidence of focal seizures in the local population than in studies done among Western populations. The majority of initial seizures occurred within 24 h of fever onset. Transient neurological abnormalities following an acute seizure were common. A quarter of children referred by general practitioners had been given anti-convulsants prior to referral but up to 20% of general practitioners had used ineffective routes for administering diazepam. However, diazepam used in the hospital was found to be effective in controlling acute febrile seizures.

Matched MeSH terms: India/ethnology
Fulltext Practice of breast self-examination amongst women attending a Malaysian Well Person's Clinic

Chan SC

Med J Malaysia, 1999 Dec;54(4):433-7.
PMID: 11072459

The practice of breast self-examination (BSE) amongst 1,303 women registered with the Well Person's Clinic, Outpatient Department, Hospital Ipoh between April 1995 and March 1997 were assessed through a questionnaire. Majority (98.2%) were never taught and did not practise BSE, 17(1.3%) practised BSE while 6 (0.5%) were taught BSE but failed to put it into practice. Only 5.8% of 52 women with past/family history of breast cancer/lump and 2.9% of 207 women with past/family history of other cancers were practising BSE regularly. Three out of 64 women with breast lumps found on clinical breast examination discovered the lumps themselves. Five of the 64 women were subsequently confirmed to have breast carcinoma.
Study site: Outpatient clinic, Hospital Ipoh, Perak, Malaysia

Matched MeSH terms: India/ethnology
A study of mean glandular dose during diagnostic mammography in Malaysia and some of the factors affecting it

Jamal N, Ng KH, McLean D

Br J Radiol, 2003 Apr;76(904):238-45.
PMID: 12711643

The primary objective of this study was to determine the mean glandular dose (MGD) during diagnostic mammography in Malaysia. The secondary objective was to evaluate some of the factors affecting MGD. A survey of standard MGD was performed, based upon quality control records for the period October 1999 to August 2001. This covered 30 mammography units from 9 manufacturers. MGD was also measured for a series of patients attending mammography examinations at three other mammography units. MGD per film was estimated from recorded radiographic factors, the compressed breast thickness (CBT) and X-ray unit calibration data. MGD per woman was calculated by summing the MGDs for all films, and averaging it over both breasts. 300 women drawn equally from three major ethnic groups, namely Malay, Chinese and Indian, took part in the study. The difference of MGD per woman between ethnic groups was tested for significance using non-parametric Kruskal-Wallis and median tests. The factors affecting MGD per woman were tested for significance using a multivariate analysis of variance. The MGD for the phantom was 1.23 mGy (range 0.22-2.39 mGy) while the mean patient based MGD per film was 1.54 mGy and 1.82 mGy for the craniocaudal and mediolateral oblique views, respectively. The mean MGD per woman was 3.37 mGy. It was also found that there is no significant difference in MGD per woman among the ethnic groups (p>0.05, Kruskal-Wallis test). However, on the multivariate test two factors, namely half value layer of the X-ray beam and (CBT), had a significant effect on MGD per woman (p<0.05). No significant relationships were seen between MGD per woman with respect to ethnicity, body mass index or age.

Matched MeSH terms: India/ethnology
Fulltext Distribution of body weight, height and body mass index in a national sample of Malaysian adults

Lim TO, Ding LM, Zaki M, Suleiman AB, Fatimah S, Siti S, et al.

Med J Malaysia, 2000 Mar;55(1):108-28.
PMID: 11072496 MyJurnal

We describe the distribution of body weight, height and body mass index (BMI) by age, sex and ethnicity in Malaysian adults. A national sample of 28,737 individuals aged 20 or older had usable data. They were selected by stratified 2-stage cluster sampling. Percentile tables and curves by age, sex and ethnicity are presented. The body weight and BMI distributions were right skewed, while that of height was symmetrical. BMI distribution showed the expected increase with age, while that of height decrease with age. Differences in BMI between the 2 sexes and among the 4 ethnic groups were observed. Indian had the highest BMI, followed by Malay, Chinese and other indigenous ethnic group.
Study name: National Health and Morbidity Survey (NHMS-1996)

Matched MeSH terms: India/ethnology
Fulltext Distribution of blood glucose in a national sample of Malaysian adults

Lim TO, Ding LM, Zaki M, Suleiman AB, Kew ST, Maimunah AH, et al.

Med J Malaysia, 2000 Mar;55(1):65-77.
PMID: 11072493 MyJurnal

We describe the distribution of capillary blood glucose (BG) by age, sex and ethnicity in Malaysian adults. A national sample of 20,041 individuals aged 30 or older had usable data. They were selected by stratified 2-stage cluster sampling. BG was measured using reflectance photometer. Percentile tables and curves by age, sex and ethnicity are presented. The BG distribution was right skewed and showed the expected increase with age. Except in Indian, women had higher BG than men. There were also marked ethnic differences. Indian had the highest BG concentration, followed by Chinese, Malay and other indigenous ethnic group.
Study name: National Health and Morbidity Survey (NHMS-1996)

Matched MeSH terms: India/ethnology
Fulltext Distribution of blood pressure in a national sample of Malaysian adults

Lim TO, Ding LM, Goh BL, Zaki M, Suleiman AB, Maimunah AH, et al.

Med J Malaysia, 2000 Mar;55(1):90-107.
PMID: 11072495 MyJurnal

We describe the distribution of blood pressure (BP) by age, sex and ethnicity in Malaysian adults. A national sample of 21,391 individuals aged 30 or older had usable data. They were selected by stratified 2-stage cluster sampling. BP was measured using an automated oscillometric device, Visomat. Percentile tables and curves by age, sex and ethnicity are presented. The systolic and diastolic BP distribution was right skewed and showed the expected increase with age. This was markedly so in Malay and other indigenous women; as a result they had most severe hypertension.
Study name: National Health and Morbidity Survey (NHMS-1996)

Matched MeSH terms: India/ethnology
Fulltext Distribution of blood total cholesterol in a national sample of Malaysian adults

Lim TO, Ding LM, Zaki M, Suleiman AB, Kew ST, Ismail M, et al.

Med J Malaysia, 2000 Mar;55(1):78-89.
PMID: 11072494 MyJurnal

We describe the distribution of capillary blood total cholesterol (BC) by age, sex and ethnicity in Malaysian adults. A national sample of 20,041 individuals aged 30 or older had usable data. They were selected by stratified 2-stage cluster sampling. BC was measured using reflectance photometer. Percentile tables and curves by age, sex and ethnicity are presented. The BC distribution was right skewed and showed the expected increase with age. There were ethnic differences. Malay had the highest BC concentration, followed by Indian, Chinese and other indigenous ethnic group. However, for all ethnic groups, BC concentrations were low in comparison those prevailing in Western populations.
Study name: National Health and Morbidity Survey (NHMS-1996)

Matched MeSH terms: India/ethnology
Racial differences in the prevalence of ulcerative colitis and Crohn's disease in Singapore

Lee YM, Fock K, See SJ, Ng TM, Khor C, Teo EK

J Gastroenterol Hepatol, 2000 Jun;15(6):622-5.
PMID: 10921415

BACKGROUND: The aim of this study was to determine the prevalence rates of inflammatory bowel disease in the different races in Singapore.
METHODS: The patients studied consisted of 58 people with an established diagnosis of ulcerative colitis (UC) and Crohn's disease (CD) as determined by a combination of clinical, radiological, endoscopic and histological criteria. The patients were residents of a well-defined geographical area in the northern part of Singapore and had been referred to the single regional hospital. Epidemiological data including sex, age, ethnicity, family history and disease type and extent were collected from case records and patient interviews.
RESULTS: There were 37 UC and 21 CD patients. Of the patients with UC, 67.5% were Chinese, 13.5% were Malay and 19% were Indian. The CD group consisted of 81% Chinese, 9.5% Malay and 9.5% Indian patients. The study population from which the patients were drawn was approximately 0.5 million in size.
CONCLUSIONS: The overall prevalence of UC was 6 per 100,000 and of CD was 3.6 per 100,000 in Singapore. There were disproportionately more Indians suffering from UC, with a prevalence of 16.2 per 100,000 in comparison with six per 100,000 for Chinese and seven per 100 000 for Malays. The relative risk of UC in Indians is 2.9-fold greater than for the Chinese (CI= 1.25-6.7) which was statistically significant. This trend was not seen for CD.

Matched MeSH terms: India/ethnology
Fulltext Giant cell arteritis with panocular involvement in an Indian male

Fathilah J, Jamaliah R

Med J Malaysia, 2003 Mar;58(1):111-4.
PMID: 14556335

A case of giant cell arteritis with systemic and panocular involvement is reported here. This elderly Indian male presented with symptoms of unilateral temporal headache and intermittent jaw claudication for a month followed by diplopia and blurring of vision and later loss of vision in the right eye. The right eye showed some limitation of ocular movements, presence of relative afferent pupil defect, anterior segment ischaemic changes and anterior ischaemic optic neuropathy. Visual evoked potential showed an absent P1 wave while the left eye with normal 6/6 vision sowed a prolonged P1 wave. Fundus fluoresceine angiography showed delay in choroidal perfusion. His erythrocyte sedimentation rate (ESR) was 120 mm/hr and he was started on oral prednisolone. Superficial temporal artery biopsy obtained one week after starting steroids was positive for giant cell arteritis. Steroids led to the resolution of optic disc swelling, disappearance of anterior segment signs, full recovery of right ocular movements and no further deterioration of the fellow eye. On steroids, he developed insomnia and progressive myopathy which resolved and is now symptom free at lower doses of steroids.

Matched MeSH terms: India/ethnology
Clinical characteristics of ulcerative colitis in Singapore, a multiracial city-state

Ling KL, Ooi CJ, Luman W, Cheong WK, Choen FS, Ng HS

J Clin Gastroenterol, 2002 Aug;35(2):144-8.
PMID: 12172359

Ulcerative colitis (UC) is rare in Asia. Singapore is an ethnically heterogeneous city-state with a population made up of Chinese (77%), Indians (7.5%), and Malays (14%). This study describes and compares the characteristics of Chinese, Malay, and Indian patients with UC.

Matched MeSH terms: India/ethnology
Risk factors and incident coronary heart disease in Chinese, Malay and Asian Indian males: the Singapore Cardiovascular Cohort Study

Lee J, Heng D, Chia KS, Chew SK, Tan BY, Hughes K

Int J Epidemiol, 2001 Oct;30(5):983-8.
PMID: 11689508

OBJECTIVE: This prospective study in Singapore investigated the relationships of established coronary risk factors with incident coronary heart disease (CHD) for Chinese, Malay, and Asian Indian males.
SUBJECTS: A cohort (consisting of 2879 males without diagnosed CHD) derived from three previous cross-sectional surveys.
METHODS: Individual baseline data were linked to registry databases to obtain the first event of CHD. Hazard ratios (HR) or relative risks for risk factors were calculated using Cox's proportional hazards model with adjustment for age and ethnic group and adjustment for age, ethnic group and all other risk factors (overall adjusted).
RESULTS: There were 24,986 person-years of follow-up. The overall adjusted HR with 95% CI are presented here. Asian Indians were at greatest risk of CHD, compared to Chinese (3.0; 2.0-4.8) and Malays (3.4; 1.9-3.3). Individuals with hypertension (2.4; 1.6-2.7) or diabetes (1.7; 1.1-2.7) showed a higher risk of CHD. High low density lipoprotein cholesterol (LDL-C) (1.5; 1.0-2.1), high fasting triglyceride (1.5; 0.9-2.6) and low high density lipoprotein cholesterol (HDL-C) (1.3; 0.9-2.0) showed a lesser but still increased risk. Alcohol intake was protective with non-drinkers having an increased risk of CHD (1.8; 1.0-3.3). Obesity (body mass index > or =30) showed an increased risk (1.8; 0.6-5.4). An increased risk of CHD was found in cigarette smokers of > or =20 pack years (1.5; 0.9-2.5) but not with lesser amounts.
CONCLUSIONS: The increased susceptibility of Asian Indian males to CHD has been confirmed in a longitudinal study. All of the examined established risk factors for CHD were found to play important but varying roles in the ethnic groups in Singapore.

Matched MeSH terms: India/ethnology
Fulltext Medication noncompliance--a thriving problem

Aziz AM, Ibrahim MI

Med J Malaysia, 1999 Jun;54(2):192-9.
PMID: 10972029

A study was conducted among out-patients attending the Melaka Tengah Health Clinic to determine their compliance status towards antihypertensive, antidiabetic and antiasthmatic drugs. A total of 585 patients were enrolled in this study. Assessment of compliance was carried out using pill-counting and house-to-house interviews 14 days from the date of medication dispensed at the counter. The noncompliance rate among the 464 successfully interviewed patients was 56%. The mean noncompliance percentage was 78.0 +/- 43.1% (range: -10.0-314.3%). Among the four variables of compliance studied, race was not seen as a determinant of compliance. The older age group and those taking two or more drugs were statistically significant to be a noncomplier. Females were highly likely not to comply with drug therapy. Patients who conform to their refill dates were not really drug compliers. Forgetting to take their drugs and inability to read instructions on drug labels were the main reasons given. Underdosing was more common than overdosing, with an estimated cost of RM20,261.00 of unused medications per year.
Study site: Klinik Kesihatan Melaka Tengah, Melaka, Malaysia

Matched MeSH terms: India/ethnology
Parasuicide: a Singapore perspective

Wai BH, Heok KE

Ethn Health, 1998 Nov;3(4):255-63.
PMID: 10403107

This study was undertaken to determine whether there were ethnic and social variations in parasuicide in the population of Singapore.

Matched MeSH terms: India/ethnology
Associations of diabetes mellitus and ethnicity with mortality in a multiethnic Asian population: data from the 1992 Singapore National Health Survey

Ma S, Cutter J, Tan CE, Chew SK, Tai ES

Am J Epidemiol, 2003 Sep 15;158(6):543-52.
PMID: 12965880 DOI: 10.1093/aje/kwg199

Despite the high prevalence of diabetes mellitus, little is known about mortality associated with diabetes in Asia. Therefore, the authors followed 3,492 Chinese, Malay, and Asian Indian adults randomly selected from the general population in Singapore. Data on glucose tolerance, demographic characteristics, and other cardiovascular disease risk factors (lipid profile, blood pressure, smoking status, alcohol consumption, and obesity) were obtained in 1992. Vital status was determined as of December 31, 2001. There were 108 deaths over a period of 9 years. Impaired fasting glycemia or impaired glucose tolerance (IFG/IGT) (hazard ratio (HR)=1.39, 95% confidence interval (CI): 0.84, 2.31) and diabetes mellitus (HR=2.49, 95% CI: 1.58, 3.94) were associated with increased mortality after adjustment for age, gender, ethnic group, and educational level. Compared with Chinese with diabetes, Indians with diabetes experienced significantly greater mortality (HR=3.86, 95% CI: 1.76, 8.44) after adjustment for gender, age, educational level, smoking, hypertension, alcohol intake, and obesity. Undiagnosed diabetes and IFG/IGT were more common than known diabetes and also were associated with increased mortality. For reduction of mortality associated with IFG/IGT and diabetes, the authors recommend a screening program to detect undiagnosed diabetes and IFG/IGT along with aggressive treatment of diabetes after diagnosis.

Matched MeSH terms: India/ethnology

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