- Research article
- Open Access
Factors associated with emergency room visits and hospitalisation amongst low-income public rental flat dwellers in Singapore
BMC Public Health volume 19, Article number: 713 (2019)
In Singapore, a densely urbanised Asian society, more than 80% of the population stays in public housing estates and the majority (90%) own their own homes. For the needy who cannot afford home ownership, public rental flats are available. Staying in a public rental flat is associated with higher hospital readmission rates and poorer access to health services. We sought to examine sociodemographic factors associated with hospital admissions and emergency room visits amongst public rental flat residents.
We surveyed all residents aged ≥60 years in a public rental housing precinct in central Singapore in 2016. Residents self-reported their number of emergency room visits, as well as hospitalisations, in the past 6 months. We obtained information on residents’ sociodemographic characteristics, medical, functional and social status via standardised questionnaires. We used chi-square to identify associations between emergency room visits/hospitalisations and sociodemographic characteristics, on univariate analysis; and logistic regression for multivariate analysis.
Of 1324 contactable residents, 928 participated in the survey, with a response rate of 70.1%. A total of 928 residents participated in our study, of which 59.5% were male (553/928) and 51.2% (476/928) were ≥ 70 years old. Around 9% (83/928) of residents had visited the emergency room in the last 6 months; while 10.5% (100/928) had been admitted to hospital in the past 6 months. On multivariable analysis, being religious (aOR = 0.43, 95%CI = 0.24–0.76) and having seen a primary care practitioner in the last 6 months (aOR = 0.46, 95%CI = 0.27–0.80) were independently associated with lower odds of emergency room visits, whereas loneliness (aOR = 1.96, 95%CI = 1.13–3.43), poorer coping (aOR = 1.72, 95%CI = 1.01–3.03) and better adherence (aOR = 2.23, 95%CI = 1.29–3.83) were independently associated with higher odds of emergency room visits. For hospitalisations, similarly poorer coping (aOR = 1.85, 95%CI = 1.12–3.07), better adherence (aOR = 1.69, 95%CI = 1.04–2.75) and poorer functional status (aOR = 1.85, 95%CI = 1.15–2.98) were all independently associated with higher odds of hospitalisations, whereas those who were religious (aOR = 0.62, 95%CI = 0.37–0.99) and those who were currently employed (aOR = 0.46, 95%CI = 0.37–0.99) had lower odds of being hospitalised.
In this public rental flat population, functional status, coping and adherence, and having a religion were independently associated with emergency room visits and hospitalisation. Residents who had seen a primary care practitioner in the last 6 months had lower odds of visiting the emergency room.
Low socioeconomic status (SES) is a recognised risk factor for increased healthcare utilisation, including hospital admissions and emergency room visits [1,2,3]. While individual-levels of SES are associated with healthcare utilisation, staying in a deprived area can also drive increased healthcare utilisation [4, 5]. It is well known that characteristics of the neighbourhood have an impact on the health and well-being of residents residing in these communities [6, 7]. The majority of these studies, though, have been conducted in Western societies; only in recent years have there been studies from urban Asian societies that explore the link between neighbourhood characteristics and health .
Singapore is one such example of a rapidly urbanising multi-ethnic Asian society. Home ownership is a key local indicator of socioeconomic status (SES) in Singapore. The majority of Singaporeans (≥ 85%) [9, 10] stay in public housing and home ownership rates are high (87.2%) . For the needy (< 5% of population) who cannot afford their own home, heavily subsidized public rental housing is available . An unique characteristic is that in Singapore, public rental housing blocks are built within the same locations as owner-occupied public housing apartments . Staying in a public rental flat in Singapore has been correlated with poorer measures of physical and mental health, amongst adult Singaporeans; even after controlling for individual SES (eg. individual employment status, education, being a recipient of financial aid) [13,14,15,16,17,18,19]. Residents of low-SES public rental flats had higher prevalence of poorer physical and mental health, poorer management of chronic disease, and reduced access to health services [13,14,15,16,17,18,19]. In terms of physical health, staying in a low-SES community was associated with poorer hypertension management , as well as higher rates of chronic pain . For mental well-being, staying in a low-SES rental flat neighbourhood was associated with poorer cognitive function  and higher depression rates  among the elderly. Overall, residents in public rental flats had lower health-related quality of life (HRQoL) compared to their counterparts staying in owner-occupied housing . This also had an impact on access to health services- residents in public rental flats had lower access to cardiovascular and cancer screening [17,18,19] and were less likely to seek treatment from medical professionals . Studies demonstrate that healthcare utilisation is higher amongst residents of public rental flats, with higher readmission risk and emergency room visits compared to the general population . However, there is a lack of literature identifying which segments of the rental flat population may be most at risk. Given that staying in public rental housing appears to be a risk marker of poorer health , we were interested in identifying factors associated with admission risk and increased utilisation of hospital services within this vulnerable population. As such, we investigated sociodemographic and medical factors associated with hospital admissions and emergency room visits amongst public rental flat residents in a rental flat precinct in Singapore.
We conducted a cross-sectional community health survey involving all residents aged ≥60 years in 12 public rental housing blocks in the Chin Swee, Jalan Kukoh, Jalan Minyak and York Hill precincts from 28th December 2016 – 5th March 2017. These precincts are served by the SingHealth Regional Health System and are within 1 km radius from the Singapore General Hospital campus. The survey captured comprehensive information on the social and medical needs of older adults who reside in public rental housing in these precincts. Public rental housing is an area-level indicator of low socio-economic status in Singapore  and people qualifying for this heavily government subsidized housing belonged to the financially needy class. For this surveyeligible participants were citizens or permanent residents, aged 60 years or older. Residents who scored 6 or less on the Abbreviated Mental Test (AMT) (used as a cutoff for identifying cognitive impairment in our local population)  and did not have a proxy to answer the survey were excluded. All eligible participants in the household could be recruited. The Singapore Ministry of Health initially provided 1817 unique addresses of older adults aged 60 years or older living within the study area; after excluding residents who were not eligible based on citizenship status and/or the presence of cognitive impairment precluding informed consent, a total of 1324 residents were potentially eligible for participation in this study.
At baseline, information on residents’ sociodemographic characteristics, medical, functional and social status was collected via interviewer-administered standardized questionnaires. Major components of the questionnaire include socio-demographic attributes and family make-up; health status and physical disabilities/limitations; health behaviours; social network and social isolation; psychological health and stressors; income sources and perception of financial adequacy; health care utilization; medication adherence; and quality of life. Interviews were performed by trained survey staff in the subject’s home who underwent standardized training prior to study commencement. Comorbidity burden was measured using the Charlson’s Comorbidity Index (CCMI) . Functional status in basic activities of daily living (bADL) was also measured using the Katz Index, while social isolation was measured using the Lubben’s Social Network Score-12 (LSNS 12) . Self-rated health-related quality of life (HRQoL) was quantified using the EQ5D . Depression was measured using the Patient Health Questionnaire-2 (PHQ-2) . Loneliness was measured using the UCLA 3-item loneliness scale . Residents were also asked if they had experienced at least one stressful life event in the past 1 year . We used the Partners in Health (PIH) scale to assess self-management behaviour, a scale that was developed to assess the self-management knowledge and behaviour in people with chronic disease . There were three components of this scale: coping, symptom management/adherence, and knowledge . The median score on the coping subscale was 26.00 (interquartile ratio, IQR = 21–29); the median score on the symptom management/adherence subscale was 35 (IQR = 28–39), and the median score on the knowledge subscale was 19 (IQR = 15–21). As the results were skewed, we dichotomised the results into “better coping” vs. “poorer coping”, “better adherence” vs “poorer adherence” and “better knowledge” vs. “poorer knowledge”, using the median values as the cutoffs. Being a recipient of community services was defined as indicating “yes” to the receipt of any of the following services: daycare, home health services, home help services, caregiver support services, home modifications, befriender visits, escort services/transportation services. Participating in social activities was defined as indicating “yes” to participation in any of the following activities: grassroots activities, activities organised by the Senior Activity Centre, going out with family members/friends, attending a place of worship. Participating in fitness activities was defined as indicating “yes” to the following: going for a walk (for exercise purposes), or playing a game of sport/exercise. Data on healthcare utilisation was also collected (hospitalisations and visits at the emergency department within the last 6 months). Having at least one visit to a primary care practitioner for any chronic medical condition in the past 6-months was operationally defined as answering “yes” to the question: have you seen a doctor in a public outpatient primary care clinic (polyclinic) or a general practitioner (GP) in a private primary care clinic in the past 6 months, for any chronic medical condition? In Singapore, primary health care is provided by both private GPs as well as public polyclinics. Residents were also asked whether they had consults with traditional Chinese medicine practitioners or traditional healers in the past 6 months. Consults with traditional medicine practitioners were not classified as equivalent to visits with a primary care practitioner.
Descriptive statistics were computed for the study population. We used chi-square to identify associations between emergency room visits/hospitalisations and sociodemographic characteristics, on univariate analysis. To identify associations between emergency room visits/hospitalisations and sociodemographic characteristics on multivariate analysis, we used a criterion of p < 0.1 on univariate analysis as a cutoff for initial entry into multivariate logistic regression models. We then removed variables that did not meet the cutoff for statistical significance in a stepwise fashion to generate the most parsimonious model, which was subsequently presented as the final model. All statistical analysis was performed using STATA (Version 22.0, USA) and statistical significance was set at p < 0.05.
This study was approved by SingHealth Centralized Institutional Review Board (CIRB 2016/2242). Informed written consent was sought, and participation was voluntary.
Of 1324 eligible residents, 928 participated in the survey, with a response rate of 70.1%. Around 9% (83/928) of residents had visited the emergency room in the last 6 months; while 10.5% (100/928) had been admitted to hospital in the past 6 months. Less than 5%(2.58%, 24/928) of residents had visited the emergency room more than once in the last 6 months (min-max = 1–16 visits), while 4.4% (41/928) of residents had been hospitalised more than once in the last six months (min-max = 1–10 hospitalisations). The sociodemographic characteristics of our population are provided in Table 1.
Factors associated with emergency room visits and hospitalisations on univariate analysis are illustrated in Table 2. Overall, on univariate analysis using chi-square testing, being non-religious, being lonely, having sustained a fall in the past 1 year, functional limitations (in both basic and instrumental activities of daily living, ADLs), poor coping, better adherence, increased comorbidity burden, and poorer self-rated health were associated with higher odds of emergency room visits (p < 0.05), whereas having visited a primary care practitioner in the last 6 months for routine review of any chronic medical condition was associated with lower odds of emergency room visits. For hospitalisations, being unemployed, being a recipient of community services, having depressive symptoms, experiencing a stressful life event, having visual problems, having sustained a fall in the past year, having functional limitations, having poor coping, higher comorbidity burden, and poorer self-rated health were all associated with hospitalisations (p < 0.05).
The factors associated with emergency room visits and hospitalisations on multivariate analysis, using multivariable logistic regression, are illustrated in Table 3. Being religious (aOR = 0.43, 95%CI = 0.24–0.76) and having visited a primary care provider in the last 6 months for routine review (aOR = 0.46, 95%CI = 0.27–0.80) were independently associated with lower odds of emergency room visits, whereas loneliness (aOR = 1.96, 95%CI = 1.13–3.43), poorer coping (aOR = 1.72, 95%CI = 1.01–3.03) and better adherence (aOR = 2.23, 95%CI = 1.29–3.83) were independently associated with higher odds of emergency room visits. For hospitalisations, similarly poorer coping (aOR = 1.85, 95%CI = 1.12–3.07), better adherence (aOR = 1.69, 95%CI = 1.04–2.75) and poorer functional status (aOR = 1.85, 95%CI = 1.15–2.98) were all independently associated with higher odds of hospitalisations, whereas those who were religious (aOR = 0.62, 95%CI = 0.37–0.99) and those who were currently employed (aOR = 0.46, 95%CI = 0.37–0.99) had lower odds of being hospitalised.
While staying in a public rental flat is a clear marker of poorer health in our local population, those who require admission to hospital, or visit the emergency department are likely to be most in need. In our study, around 9% (83/928) of patients had attended the emergency room in the last 6 months; while 10.5% (100/928) had been admitted to hospital in the past 6 months. These figures are comparable with the higher rates of hospitalisation and emergency room visits amongst rental flat residents, which has previously been noted in the literature. In our previous study comparing healthcare utilisation between residents in rental and owner-occupied housing, 15% of the rental flat population had been hospitalised ≥3 times in 1 year, whereas 13% had visited the emergency department ≥4 times in 1 year. This was compared against rates of 10 and 5%, respectively, in the general population . In this study, functional limitation was associated with higher odds of hospitalisation. This was not surprising, as increased functional limitation makes care in the community more challenging [32, 33]. Being religious was independently associated with lower odds of emergency room visits, as well as hospitalisation, in our rental flat population. We hypothesise that having a religion may have helped low-income residents improve mental resilience and coping ; studies in the local setting found that elderly people of all religious affiliations reported less frequent treatment by healthcare professionals for mental health problems , which are tied closely to physical health and are prevalent in our rental flat population [14, 15]. An alternative explanation might be that residents who identified affiliation with a religion also had access to community services provided by religious organisations. In Singapore, the “landscape of help” encompasses state structures that provide basic housing, insurance and social security, as well as a “many helping hands” approach, in which voluntary welfare organisations provide services and the state acts as an enabler . Perhaps services provided by these religious organisations, such as free clinics, meals delivery services and befriender services, help to meet the physical and psychological needs of rental flat dwellers and reduce the odds of healthcare utilisation. Poorer coping, but better adherence, was associated with higher odds of emergency room visits as well as hospitalisation. Perhaps in this low-income population, individuals who were more engaged and adherent with their treatment plan had higher odds of visiting the emergency department or being hospitalised because of a lack of engagement with primary care .
Interestingly, there were some differences between the factors associated with healthcare utilisation in this public rental flat population, when compared against the population at large. Loneliness in the rental flat population was associated with higher odds of emergency room attendance. While studies in Western societies do demonstrate an association between loneliness and increased physician visits [37, 38], our observation (i.e loneliness associated with higher odds of healthcare utilisation) runs counter to previous studies in our local population that demonstrated a significant association between loneliness and lower odds of healthcare utilisation in the general population . Perhaps lonely residents in disadvantaged rental flat populations utilise healthcare more frequently because smaller social networks provide less reserves of support to fall back on in the event of illness, and hence these individuals are affected disproportionately. Having at least one visit to a primary care practitioner for any chronic medical condition in the past 6-months was associated with lower, not higher, odds of emergency room visits in our rental flat population. Conversely, studies of healthcare utilisation in the general Singaporean population indicated that past healthcare use (eg. specialist clinic visits) was a predictor of higher likelihood of healthcare utilisation . Other studies in Western populations did not demonstrate a link between primary care access and emergency room attendance in deprived populations . We hypothesise that in our rental flat population, emergency room attendance is seen as the “last resort”, with residents preferring to self-medicate at home and avoiding preventive care . Perhaps the association between regular medical care and lower odds of emergency room visits could be attributable to higher participation in preventive care for residents accessing regular primary care , and a willingness to seek medical consultation earlier, rather than later, when ill. In our previous qualitative study of attitudes to primary care amongst rental flat residents, rental flat residents expressed a marked desire to seek medical consultation only for “major” illnesses, but not “minor” ones . However, definitions of minor and major ailments varied greatly, and some defined minor ailments as those with mild/tolerable symptoms, and major ailments as those with symptoms greatly affecting their quality of life, without identifying that both major and minor ailments could form part of the same underlying disease process . Low-income Singaporeans (including all residents of public rental flats) benefit from the Community Health Assist Scheme (CHAS), which subsidises care at private general practitioners within the community for chronic diseases, with the aim of encouraging Singaporeans to turn to their family physicians first, rather than going straight to hospitals . Given that visiting a primary care provider in the past 6 monthsis associated with lower odds of healthcare utilisation amongst lower-income Singaporeans, usage of primary care amongst rental flat residents can be further incentivised.
The limitations of our study are as follows. Given the cross-sectional nature of our study, we can only identify associations, but not causation. Additionally, this study was carried out in a single site; we were unable to obtain a nationally representative sample of the rental flat population in Singapore because of logistical difficulties, as rental flats are scattered across the entire country in socially-integrated precincts. Therefore, the findings may not be fully representative of the rental flat population as a whole. However, we note that our study population is fairly similar in terms of sociodemographic makeup when compared against national data on low-income neighbourhoods .
In conclusion, in this public rental flat population, impaired functional status, loneliness and poorer coping were independently associated with emergency room visits and hospitalisation. Residents who had visited a Western primary care practitioner at least once in the past 6 months for chronic medical conditions had lower odds of visiting theemergency room. More can be done to strengthen access amongst lower-income Singaporeans to primary care, so as to potentially reduce preventable emergency room visits and hospitalizations. s.
Availability of data and materials
The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.
Abbreviated Mental Test
Basic activities of daily living
Charlson’s Comorbidity Index
Community Health Assist Scheme
Health-related quality of life
Lubbens’ Social Network Score-12
Patient Health Questionnaire-2
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This research received grant funding from SingHealth Foundation Health Services Research (Aging) Startup Grant SHF/HSRAg004/2015. The funding sources had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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This study was approved by SingHealth Centralized Institutional Review Board (CIRB 2016/2242) and informed written consent was obtained from all participants.
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Wee, L.E., Low, L.L., Thumboo, J. et al. Factors associated with emergency room visits and hospitalisation amongst low-income public rental flat dwellers in Singapore. BMC Public Health 19, 713 (2019). https://doi.org/10.1186/s12889-019-7009-5
- Emergency room visits
- Low income