Factors influencing protective behaviours during haze episodes in Singapore: A population-based study

INTRODUCTION@#Haze is a recurrent problem in Southeast Asia. Exposure to haze is linked to ophthalmic, respiratory and cardiovascular diseases, and mortality. In this study, we investigated the role of demographic factors, knowledge and perceived risk in influencing protective behaviours during the 2013 haze in Singapore.@*METHODS@#We evaluated 696 adults in a cross-sectional study. Participants were sampled via a 2-stage simple random sampling without replacement from a large residential district in Singapore in 2015. The questionnaire measured the participant's knowledge, perceived risk and behaviours during the Southeast Asian haze crisis in 2013. Reliability and validity of the questionnaire were assessed using comparative fit index (≥0.96) and root mean square error of approximation (≤0.05). We performed structural equation modelling to examine the relationship between the hypothesised factors and protective behaviours.@*RESULTS@#More than 95% of the individuals engaged in at least 1 form of protective behaviour. Knowledge was strongly associated with protective behaviours via direct effect (β=0.45, 95% CI 0.19-0.69, @*CONCLUSION@#Knowledge was associated with protective behaviours, suggesting the importance of public education. Efforts should target those of lower education level and smokers. The wearing of N95 masks correlates with uptake of other protective behaviours.

Factors and experiences associated with unscheduled 30-day hospital readmission: A mixed method study

INTRODUCTION@#Analysis of risk factors can pave the way for reducing unscheduled hospital readmissions and improve resource utilisation.@*METHODS@#This was a concurrent nested, mixed method study. Factors associated with patients readmitted within 30 days between 2011 and 2015 at the National University Hospital, Singapore (N=104,496) were examined. Fifty patients were sampled in 2016 to inform an embedded qualitative study. Narrative interviews explored the periods of readmissions and related experiences, contrasted against those of non-readmitted patients.@*RESULTS@#Neoplastic disease (odds ratio [OR] 1.91, 95% confidence interval [CI] 1.70-2.15), number of discharged medications (5 to 10 medications OR 1.21, 95% CI 1.14-1.29; ≥11 medications OR 1.80, 95% CI 1.66-1.95) and length of stay >7 days (OR 1.46, 95% CI 1.36-1.58) were most significantly associated with readmissions. Other factors including number of surgical operations, subvention class, number of emergency department visits in the previous year, hospital bill size, gender, age, Charlson comorbidity index and ethnicity were also independently associated with hospital readmissions. Although readmitted and non-readmitted patients shared some common experiences, they reported different psychological reactions to their illnesses and viewed hospital care differently. Negative emotions, feeling of being left out by the healthcare team and perception of ineffective or inappropriate treatment were expressed by readmitted patients.@*CONCLUSION@#Patient, hospital and system-related factors were associated with readmissions, which may allow early identification of at-risk patients. Qualitative analysis suggested several areas of improvement in care including greater empowerment and involvement of patients in care and decision making.

Awareness and Attitudes of Community-Dwelling Individuals in Singapore towards Participating in Advance Care Planning

<p><b>INTRODUCTION</b>Advance care planning (ACP) is an important aspect of end-of-life care that has been shown to improve patient autonomy in decision-making and reduce stress for surviving family members. Given the rapidly ageing population in Singapore, a greater emphasis on end-of-life care planning is needed. This study therefore sought to examine the awareness and attitudes of the general Singaporean community towards participating in ACP, which are not known hitherto.</p><p><b>MATERIALS AND METHODS</b>A 24-item interviewer-administered questionnaire was constructed and administered via door-to-door survey amongst community-dwelling residents living in Housing and Development Board (HDB) flats across Singapore, selected via a two-stage stratified random sampling.</p><p><b>RESULTS</b>Of the 406 completed surveys, 14.4% of respondents had heard of ACP (n = 58), mostly through the media (67.9%), from family and friends (21.4%) and healthcare providers (21.4%). Only 26.8% of those who had previously heard of ACP knew how to begin an ACP discussion and 12.5% of them had a prior ACP discussion. After education, the majority of respondents were willing to begin an ACP discussion (n = 236, 60.1%). Being of an older age, having a life threatening illness, and having more knowledge about ACP were significant factors associated with willingness to have an ACP discussion. Barriers included perceiving oneself as still healthy and preferring the family to make decisions instead.</p><p><b>CONCLUSION</b>There is a low awareness but high expressed willingness to engage in an ACP discussion amongst the Singaporean community. More efforts are needed to educate the public about ACP, engage the family unit and correct the present misconceptions.</p>

Comparison of Medication Adherence and Treatment Persistence between New Oral Anticoagulant and Warfarin among Patients

<p><b>INTRODUCTION</b>This study aimed to compare medication adherence and treatment persistence of patients on warfarin versus rivaroxaban in Singapore. A secondary objective was to identify significant covariates influencing adherence.</p><p><b>MATERIALS AND METHODS</b>A retrospective cohort study was conducted where data from September 2009 to October 2014 was retrieved from the hospital electronic databases. Prescription records of rivaroxaban patients with 3 months or more of continuous prescription were extracted and compared against those of patients on warfarin. Primary outcome of adherence was determined based on the medication possession ratio (MPR), while treatment persistence was determined by outpatient clinic appointment gaps.</p><p><b>RESULTS</b>A total of 94 rivaroxaban and 137 warfarin users were analysed by complete case analysis. The MPR of warfarin patients was lower than rivaroxaban patients by 10% (95% CI, 6.4% to 13.6%; P <0.0001). Also, there were more warfarin patients who had gaps in treatment persistence compared to those prescribed rivaroxaban (8.0% vs 1.1%; P = 0.03). Significant factors affecting medication adherence were age and duration of anticoagulant use. For every 10-year increase in age, MPR increased by 1.7% (95% CI, 0.7% to 2.8%). Similarly, for every year increase in duration of use, MPR increased by 1.8% (95% CI, 0.6% to 3.0%). Race, gender, concomitant medication and type of residence were not found to be significant covariates in the multivariable analysis.</p><p><b>CONCLUSION</b>Patients on rivaroxaban are likely to be more adherent to their prescribed oral anticoagulant with increasing age and duration of treatment influencing adherence.</p>

Younger women with ovulation disorders and unexplained infertility predict a higher success rate in superovulation (SO) intrauterine insemination (IUI)

<p><b>INTRODUCTION</b>Superovulation-intrauterine insemination (SO-IUI) is the most common assisted reproductive technique (ART) in the world, with good evidence of efficacy and cost-effectiveness. However, parameters affecting its success have not been consistently reported. So in this study, we aim at determining the parameters influencing the success rate of SO-IUI.</p><p><b>MATERIALS AND METHODS</b>We conducted a retrospective cohort study of 797 SO-IUI cycles from 606 patients, performed between 2007 and 2009 in a single centre. These women received clomiphene citrate (CC), recombinant FSH (rFSH) or both.</p><p><b>RESULTS</b>There were 127 clinical pregnancies with a pregnancy rate (PR) of 15.9% (127/797) per treatment cycle. Factors associated with higher PR included maternal age <38 (P = 0.02), subfertility diagnoses of ovulatory disorders, unexplained infertility, sexual dysfunction and unilateral tubal obstruction (P = 0.02), an endometrial thickness ≥8 mm (P = 0.03), total number motile spermatozoa (TNMS) of ≥1 million (P = 0.03), and spermatozoa normal forms (NF) ≥4% (P <0.01) on bivariate analysis. When CC is used, the endometrial thickness is more likely to be suboptimal (<8 mm). All the above parameters remained significant except the subfertility diagnoses on multivariate analysis.</p><p><b>CONCLUSION</b>Patients' selection with women <38 years old and preferably with ovulation disorders and unexplained infertility is associated with the highest PR in SO-IUI. Cycle parameters such as the use of rFSH alone, with the avoidance of CC, TNMS ≥1 million and NF ≥4% is likely to result in the best outcomes and reduce the high order multiple pregnancy risk.</p>

How do primary care physicians in Singapore keep healthy?

<p><b>INTRODUCTION</b>Not much is known regarding how primary care physicians (PCPs) in Singapore keep themselves healthy and mitigate ill health. This study aims to determine the health-seeking behaviour of local PCPs and to identify the predictors of local PCPs attaining the recommended level of exercise.</p><p><b>METHODS</b>This study was a cross-sectional questionnaire survey, which included questions on the demographic characteristics, practice profiles and health-seeking behaviour of PCPs. The sampling frame was the 1,400 listed members of the College of Family Physicians Singapore. The anonymised survey was executed in two phases: a postal survey, followed by a web-based survey on the College of Family Physicians Singapore website. The two data sets were collated; the categorical variables, summarised; and the differences between subgroups (based on exercise engagement), compared using Fisher's exact test. The effect of each risk factor on exercise duration was quantified using odds ratio (OR) estimate and 95% confidence interval (CI). Multivariate logistic regression analysis was performed to identify significant predictors of exercise engagement.</p><p><b>RESULTS</b>A total of 631 PCPs participated in the survey--26% were ≤ 34 years old, 58% were male, 21% were single, 34% were singleton practitioners, and 56% were private practitioners. The percentage of PCPs who exercised ≥ 2.5 hours weekly was 29%, while 28% exercised < 0.5 hours weekly. Of the PCPs surveyed, 1% currently smoke, 0.8% drink more than 14 units of alcohol weekly, 60% undertook health screening, 65% had blood investigations done, and 64% had taken preventive measures such as getting influenza vaccination.</p><p><b>CONCLUSION</b>While local PCPs generally did not have undesirable habits such as smoking and alcohol abuse, they could further increase their exercise intensity and undertake more preventive measures such as getting vaccinated against various diseases.</p>

Comparison of clinical outcomes and cost between surgical and transcatheter device closure of atrial septal defects in Singapore children

<p><b>INTRODUCTION</b>With advances in interventional catheterisation, transcatheter device closure of atrial septal defect (ASD) is now a feasible option to open heart surgery, especially in patients with isolated ASD. We aim to compare the outcomes, benefits and costs between device closure versus standard open-heart surgery for ASD in Singapore.</p><p><b>MATERIALS AND METHODS</b>This is a comparative study between 2 cohorts with isolated secundum ASDs who underwent closure of ASD either by surgery or device, at the Department of Paediatrics, National University Hospital (NUH). The clinical outcomes, complications, length of stay and total costs incurred were compared.</p><p><b>RESULTS</b>Surgical patients were at slightly greater risk of developing complications (RR=1.33; 95% CI, 0.30 to 5.95) than the device group. The median length of inpatient stay for the surgical group was significantly longer than that for the device group. Seventy percent of the patients in the device group did not need to be in ICU while 40% of patients in the surgery group stayed 2 or at least 3 days in ICU (P <0.001). The mean cost per successful procedure was $1511 (95% CI, -352 to 3375) higher for the device group patients despite a shorter length of stay in hospital.</p><p><b>CONCLUSIONS</b>We concluded that transcatheter device closure is an effective and safe alternative to surgery in the treatment of suitable ASDs. Despite the high cost of the device, direct and indirect benefits for the patients and their families, who undergo device occlusion include less morbidity, better cosmesis, shorter length of stay in hospital, faster recovery and shorter time taken to resume normal activities.</p>

Differential risk for early breastfeeding jaundice in a multi-ethnic Asian cohort

<p><b>INTRODUCTION</b>To explore the relationship between ethnic origin and mode of feeding with early neonatal jaundice, we examined maternal and neonatal risk factors for hyperbilirubinaemia in a multi-ethnic Asian cohort of healthy term newborns.</p><p><b>MATERIALS AND METHODS</b>This is an observational cohort study in a maternity ward serving a multi-ethnic cosmopolitan community. The relationship between hyperbilirubinaemia (bilirubin >or=150 mmol/L before 48 hours to 72 hours after birth), ethnic origin, weight loss after birth, need for phototherapy, and other factors were examined. Bivariate comparisons and binary logistic regression were used to investigate the relationship between hyperbilirubinaemia/phototherapy with maternal and neonatal risk factors.</p><p><b>RESULTS</b>A consecutive group of 1034 neonates (56% Chinese, 24% Indian subcontinent, 9% Malay) with birth weights >or=2500 g was investigated. Overall factors that contributed significantly to hyperbilirubinaemia/phototherapy were gestational age, Chinese ethnic origin, weight loss of >or=7%, vaginal delivery, glucose-6-phosphate-dehydrogenase (G6PD) deficiency, breastfeeding and ABO incompatibility. Chinese neonates who were totally breastfed had a higher risk for jaundice [adjusted odds ratio (OR) = 1.64; 95% confidence intervals (CI), 1.11- 2.44; P <0.014], and phototherapy (adjusted OR = 2.75; 95% CI 1.77-4.27; P <0.001) compared to those supplemented with, or totally formula fed. In contrast, the risk of jaundice for non- Chinese infants did not differ according to the mode of feed. Although weight loss as a whole increased the risk for jaundice (adjusted OR = 1.43; 95%CI, 1.03-1.99; P = 0.031), jaundice in Chinese neonates was not due to ineffective breastfeeding because both Chinese and non-Chinese breastfed infants lost similar weights.</p><p><b>CONCLUSIONS</b>Chinese ethnic origin was an independent risk factor for hyperbilirubinaemia and phototherapy. Breastfeeding was not a risk factor for hyperbilirubinaemia/phototherapy in non-Chinese Asian infants.</p>

A review of fatal road traffic accidents in Singapore from 2000 to 2004

<p><b>INTRODUCTION</b>This retrospective study aims to assess the epidemiology of road traffic accident (RTA) fatalities in Singapore, other causes of death besides trauma in a RTA, and identify the groups at risk.</p><p><b>MATERIALS AND METHODS</b>Data of 1038 RTA fatalities were reported between 2000 and 2004. Analyses using the Fisher's exact test for discrete variables and multivariate Cox regression analysis were performed to identify groups at risk. The risk of fatality was measured using the prevalence rate ratio (PRR).</p><p><b>RESULTS</b>The median age of victims in the sample was 36 years (interquartile range 24 to 55). Eight hundred and thirty six cases (78%) were in the economically productive age range of 15 to 65 years. Over the 5-year period, there was a preponderance of males. Majority of fatalities involved multiple injuries. There were also 64 (6.2%) and 25 (2.4%) cases of RTA fatalities from infective and cardiovascular (CVS) causes, respectively. Multivariate analyses showed that those > or = 60 years were 4 (95% CI of PRR, 3.04 to 5.43) times as likely to be pedestrian fatalities. Conversely, the risk of fatalities involving pedestrians and cyclists was reduced for males (PRR = 0.58; 95% CI, 0.46 to 0.73). However, males were at increased risk of fatalities involving motorcyclists, scooter and pillion riders (PRR = 1.96; 95% CI, 1.43 to 2.70), whereas such risk was reduced for those aged 30 to 59 (PRR = 0.70; 95% CI, 0.58 to 0.85) or > or = 60 years (PRR = 0.30; 95% CI, 0.21 to 0.42), respectively.</p><p><b>CONCLUSION</b>As such, it appears that the groups at-risk had varying demographic characteristics. Public education could be modified to target these different groups to reduce the number of fatalities.</p>

Does team learning motivate students' engagement in an evidence-based medicine course?

<p><b>INTRODUCTION</b>Small group-based instructional methods such as team learning have been shown to produce positive educational outcomes. To motivate students' learning in an evidence-based medicine course, we explore team learning as a teaching strategy, and describe students' engagement and preference for this mode of learning.</p><p><b>MATERIALS AND METHODS</b>An adaptation of team learning was implemented in September 2007 for all Year 2 Medical undergraduates attending the Principles in Evidence-Based Medicine course at the National University of Singapore. First, each student attempted a multiple-choice question individually. Next, the student discussed the same question with his/her team and provided a group response. Individual and group answers were recorded using keypads and Turning Point software. Students' engagement and preference for team learning were measured using a self-reported Likert Scale instrument. The pattern of engagement in team learning was compared with conventional tutorial involving the same cohort of students using chi2 trend test.</p><p><b>RESULTS</b>A total of 224 (88%) and 215 (84%) students responded to the surveys on team learning and conventional tutorial respectively. Overall, students reported a higher level of engagement with team learning than conventional tutorial. However, regardless of the mode of instruction, the students were equally likely to pay attention in class. Sixty-nine per cent of students found team learning more enjoyable than conventional tutorial, with 73% preferring this mode of learning. There was a tendency for the percentage of correct responses to improve after group discussion.</p><p><b>CONCLUSIONS</b>Team learning is the preferred mode of learning by Year 2 students attending the evidence-based medicine course. It promoted a high level of students' engagement and interaction in class.</p>

Public trust in primary care doctors, the medical profession and the healthcare system among Redhill residents in Singapore

<p><b>INTRODUCTION</b>There have been few studies on public trust in doctors and healthcare systems and this is the first in Singapore.</p><p><b>MATERIALS AND METHODS</b>A cross-sectional survey was carried out in Redhill in January 2005. Citizens or Permanent Residents aged > or =18 years were randomly selected, one per household to avoid cluster bias, and 361 participated (response rate 68.7%). An interview administered questionnaire included 3 questionnaires measuring public trust: "Interpersonal Trust in Physicians Scale" for primary care doctors; "Trust in Physicians Generally Scale" for the medical profession; and "Trust in Healthcare System Scale" for the Healthcare System. Questions were answered on a Likert scale: 1. Strongly Disagree, 2. Disagree, 3. Neutral, 4. Agree, 5. Strongly Agree. Individual transformed scores of trust (range, 0 to 100) were equally divided into 5 categories with their average being the transformed mean.</p><p><b>RESULTS</b>Trust in primary care doctors (mean 59.7) had proportions (prevalence rates) of: very low 0.3%, low 2.5%, neutral 40.4%, high 54.0%, and very high 2.8%. Trust in the medical profession (mean 61.8) had proportions of: very low 1.0%, low 7.7%, neutral 33.7%, high 47.0%, and very high 10.5%. Trust in the healthcare system (mean 61.5) had proportions of: very low 0.5%, low 4.1%, neutral 40.0%, high 48.7%, and very high 6.7%. For areas of the healthcare system, proportions of high/very high trust were: "Healthcare Providers' Expertise" (70.8%), "Quality of Care" (61.5%), "Patient Focus of Providers" (58.7%), "Information Supply and Communication by Care Providers" (52.3%), "Quality of Cooperation" (43.3%), and Policies of the Healthcare System" (24.6%).</p><p><b>CONCLUSIONS</b>While low proportions had low/very low trust, the high proportions with neutral trust and the rather low level of trust in "Policies of the Healthcare System" are causes for concern.</p>