Emergency department utilisation by older people in metropolitan Melbourne, 2008-12: findings from the Reducing Older Patient's Avoidable Presentations for Emergency Care Treatment (REDIRECT) study.

Objective Older patients are over-represented in emergency departments (ED), with many presenting for conditions that could potentially be managed in general practice. The aims of the present study were to examine the characteristics of ED presentations by older patients and to identify patient factors contributing to potentially avoidable general practitioner (PAGP)-type presentations. Methods A retrospective analysis was performed of routinely collected data comprising ED presentations by patients aged ≥70 years at public hospitals across metropolitan Melbourne from January 2008 to December 2012. Presentations were classified according to the National Healthcare Agreement definition for PAGP-type presentations. Presentations were characterised according to patient demographic and clinical factors and were compared across PAGP-type and non-PAGP-type groups. Results There were 744519 presentations to the ED by older people, of which 103471 (13.9%) were classified as PAGP-type presentations. The volume of such presentations declined over the study period from 20893 (14.9%) in 2008 to 20346 (12.8%) in 2012. External injuries were the most common diagnoses (13761; 13.3%) associated with PAGP-type presentations. Sixty-one per cent of PAGP-type presentations did not involve either an investigation or a procedure. Patients were referred back to a medical officer (including a general practitioner (GP)) in 58.7% of cases. Conclusion Older people made a significant number of PAGP-type presentations to the ED during the period 2008-12. A low rate of referral back to the primary care setting implies a potential lost opportunity to redirect older patients from ED services back to their GPs for ongoing care. What is known about the topic? Older patients are increasingly attending EDs, with a proportion attending for problems that could potentially be managed in the general practice setting (termed PAGP-type presentations). What does this paper add? This study found that PAGP-type presentations, although declining, remain an important component of ED demand. Patients presented for a wide array of conditions and during periods that may indicate difficulty accessing a GP. What are the implications for practitioners? Strategies to redirect PAGP-type presentations to the GP setting are required at both the primary and acute care levels. These include increasing out-of-hours GP services, better triaging and appointment management in GP clinics and improved communication between ED clinicians and patients' GPs. Although some strategies have been implemented, further examination is required to assess their ongoing effectiveness.

General practice utilisation of Medicare Benefits Schedule items to support the care of older patients: findings from the REDIRECT study.

Medicare Benefits Schedule (MBS) items designed to support the wellbeing of older people may reduce unnecessary emergency department utilisation, however it is unclear to what extent such items are used. This study examined general practitioner (GP) utilisation of these MBS items through an analysis of the Melbourne East Monash General Practice Database (MAGNET), which contains information collected from GP clinics within the inner east Melbourne region. Sociodemographic and MBS claim data were extracted for patients aged ≥75 years attending a GP between 2005 and 2012. Utilisation of 75+ Health Assessments, General Practitioner Management Plans (GPMP), Team Care Arrangements (TCAs) or reviews, or Medication Management Reviews (MMRs) was assessed. There were 12962 (60.6%) patients assigned at least one of the MBS items. The highest level of claiming was for GPMPs (n=4754; 35.8%) and TCAs (n=4476; 33.7%), with MMRs having the lowest use (n=1023; 6.8%). Examination of GP and patient barriers to the uptake of these items is needed, along with a greater understanding as to whether those most at risk of hospitalisation are receiving these services. Strategies that support capacity to implement these items are also required.

Cardiovascular disease screening in general practice: General practitioner recording of common risk factors.

The assessment and screening of individual risk factors for cardiovascular disease (CVD) is a critical component of CVD prevention strategies in general practice (GP). This study sought to examine current CVD risk factor recording as recommended by Australian guidelines for the management of absolute cardiovascular disease risk. A retrospective analysis of routine GP data from 149,306 GP patients aged 45years and above in eastern Melbourne was conducted. Data were collected from GP clinics located throughout inner east Melbourne from July 2011 to September 2014 through the Melbourne East Monash General Practice Database. Recording of primary risk factors necessary for CVD screening as recommended by the national guidelines was assessed, and logistic regression with generalised estimating equations was used to estimate associations between patient characteristics and risk factor recording. 137,976 (92.4%) patients were found to have had at least one risk factor recorded, 62,214 (41.7%) had the Framingham risk factors recorded (lipids, blood pressure, smoking status), while only 1957 (1.3%) had all risk factors recorded. Females (Odds Ratio [OR]: 0.72, 95% Confidence Interval [CI]: 0.65, 0.81), and those identified with diabetes (OR: 12.26, 95% CI: 9.58, 15.68) were less and more likely to have documented risk factors, respectively. Given the role of GPs in the prevention and management of CVD, it is important to improve the identification of high risk patients through screening and recording of CVD risk factors. Strategies are therefore needed to encourage ongoing CVD risk factor recording to support preventive care by GPs.

Characteristics of patients presenting to an after-hours clinic: results of a MAGNET analysis.

After-hours access to general practice (GP) is critical to supporting accessibility and reducing emergency department demand. To understand who utilises after-hours GP services, this study examined the characteristics of presentations to an Eastern Melbourne after-hours clinic between 2005 and 2014. Descriptive analyses of patient and presentation characteristics, diagnoses, medications and pathology were conducted. Across the study period, 39.1% of presentations to the clinic (N=64,800) were by patients under 18 years of age. Females were found to attend more often than males, and nearly 79% of patients attended only once. The most common diagnoses were respiratory system diseases (13.4%), gastrointestinal system diseases (12.6%) and eye and ear problems (11.6%). Antibacterial medications accounted for over half (53.0%) of all prescriptions, with 34% of antibiotics prescribed to patients under 18 years of age. Seasonal variation in GP demand was also observed. Presenting patients differed from the wider GP patient population, with more young patients, and a higher proportion of prescriptions for antibacterial medications compared to other predominantly non-after-hours practices. Further research is required to understand the health-seeking, decision-making of patients who utilise after-hours GPs over predominantly non-after-hours primary care services, to inform service promotion and delivery strategies.

After-hours medical deputising services: patterns of use by older people.

OBJECTIVES: To examine how older people use an after-hours medical deputising service that arranges home visits by locum general practitioners; to identify differences in how people who live in the community and those who live in residential aged care facilities (RACFs) use this service. DESIGN, SETTING AND PARTICIPANTS: Retrospective analysis of routinely collected administrative data from the Melbourne Medical Deputising Service (MMDS) for the 5-year period, 1 January 2008 - 31 December 2012. Data for older people (≥ 70 years old) residing in greater Melbourne and surrounding areas were analysed. MAIN OUTCOME MEASURES: Numbers and rates of MMDS bookings for acute after-hours care, stratified according to living arrangements (RACF v community-dwelling residents). RESULTS: Of the 357 112 bookings logged for older patients during 2008-2012, 81% were for RACF patients, a disproportionate use of the service compared with that by older people dwelling in the community. Most MMDS bookings resulted in a locum GP visiting the patient. During 2008-2012, the booking rate for RACFs increased from 121 to 168 per 1000 people aged 70 years or more, a 39% increase; the booking rate for people not living in RACFs increased from 33 to 40 per 1000 people aged 70 years or more, a 21% increase. CONCLUSIONS: After-hours locum GPs booked through the MMDS mainly attended patients living in RACFs during 2008-2012. Further research is required to determine the reasons for differences in the use of locum services by older people living in RACFs and in the community.

Obesity management in general practice: does current practice match guideline recommendations?

OBJECTIVE: To assess the documentation of measures recommended in the National Health and Medical Research Council clinical practice guidelines for managing overweight and obesity in adults, adolescents and children in Australia. DESIGN, SETTING AND PARTICIPANTS: Retrospective analysis of routine general practice data from 270,426 adult patients. Data were extracted from the Melbourne East Monash General Practice Database, collected from general practice clinics located in the inner-eastern Melbourne region between 1 July 2011 and 31 December 2013. MAIN OUTCOME MEASURES: Documentation of quantitative measures of obesity identified in the national guidelines - specifically, body mass index (BMI) and waist circumference. RESULTS: 22.2% and 4.3% of patients had a BMI and waist circumference, respectively, recorded in their computerised medical records. There were variations in BMI documentation across age and sex, with those aged over 75 years (odds ratio [OR], 1.60; 95% CI, 1.48-1.72) more likely, and women (OR, 0.86; 95% CI, 0.78-0.94) less likely to have a documented BMI. Patients with diabetes (OR, 1.85; 95% CI, 1.70-1.99) or who were prescribed diabetes-related medication (OR, 1.24; 95% CI, 1.12-1.35), those with hypertension (OR, 1.18; 95% CI, 1.11-1.24) or hyperlipidaemia (OR, 1.26; 95% CI, 1.20-1.33) were more likely to have a documented BMI. CONCLUSIONS: Recording of measures of obesity in general practice is currently not consistent with guideline recommendations. Strategies to support general practitioners may improve their documentation of measures of obesity.

Extreme temperatures and emergency department admissions for childhood asthma in Brisbane, Australia.

OBJECTIVES: To examine the effect of extreme temperatures on emergency department admissions (EDAs) for childhood asthma. METHODS: An ecological design was used in this study. A Poisson linear regression model combined with a distributed lag non-linear model was used to quantify the effect of temperature on EDAs for asthma among children aged 0-14 years in Brisbane, Australia, during January 2003-December 2009, while controlling for air pollution, relative humidity, day of the week, season and long-term trends. The model residuals were checked to identify whether there was an added effect due to heat waves or cold spells. RESULTS: There were 13 324 EDAs for childhood asthma during the study period. Both hot and cold temperatures were associated with increases in EDAs for childhood asthma, and their effects both appeared to be acute. An added effect of heat waves on EDAs for childhood asthma was observed, but no added effect of cold spells was found. Male children and children aged 0-4 years were most vulnerable to heat effects, while children aged 10-14 years were most vulnerable to cold effects. CONCLUSIONS: Both hot and cold temperatures seemed to affect EDAs for childhood asthma. As climate change continues, children aged 0-4 years are at particular risk for asthma.

Diurnal temperature range and childhood asthma: a time-series study.

BACKGROUND: Hot and cold temperatures have been associated with childhood asthma. However, the relationship between daily temperature variation and childhood asthma is not well understood. This study aimed to examine the relationship between diurnal temperature range (DTR) and childhood asthma. METHODS: A Poisson generalized linear model combined with a distributed lag non-linear model was used to examine the relationship between DTR and emergency department admissions for childhood asthma in Brisbane, from January 1st 2003 to December 31st 2009. RESULTS: There was a statistically significant relationship between DTR and childhood asthma. The DTR effect on childhood asthma increased above a DTR of 10°C. The effect of DTR on childhood asthma was the greatest for lag 0-9 days, with a 31% (95% confidence interval: 11% - 58%) increase of emergency department admissions per 5°C increment of DTR. Male children and children aged 5-9 years appeared to be more vulnerable to the DTR effect than others. CONCLUSIONS: Large DTR may trigger childhood asthma. Future measures to control and prevent childhood asthma should include taking temperature variability into account. More protective measures should be taken after a day of DTR above 10°C.

The effect of heat waves on ambulance attendances in Brisbane, Australia.

UNLABELLED: Introduction Heat waves have significant impacts on mortality and morbidity. However, little is known regarding effects on pre-admission health outcomes such as ambulance attendances, particularly in subtropical regions. Problem This study investigated both main temperature effects and the added effects of heat waves on ambulance attendances in Brisbane, a subtropical city in Australia. METHODS: Daily data relating to 783,935 ambulance attendances, along with data on meteorological variables and air pollutants, were collected for the period 2000-2007. Ambient temperature (main) effects were assessed using a distributed lag nonlinear approach that accounted for delayed effects of temperature, while added heat wave effects were incorporated separately using a local heat wave definition. Effect estimates were obtained for total, cardiovascular and respiratory attendances, and different age groups. RESULTS: Main effects of temperature were found for total attendances, which increased by 50.6% (95% CI, 32.3%-71.4%) for a 9.5°C increase above a reference temperature of 29°C. An added heat wave effect on total attendances was observed (18.8%; 95% CI, 6.5%-32.5%). Significant effects were found for both respiratory and cardiovascular attendances, particularly for those aged 65 and above. CONCLUSION: Ambulance attendances can be significantly impacted by sustained periods of high temperatures, and are a valid source of early detection of the effects of extreme temperatures on the population. The planning of ambulance services may need to be adapted as a consequence of increasing numbers of heat waves in the future. Ambulance attendance data also should be utilized in the development of heat warning systems and climate change adaptation strategies.

Ambient temperature and cardiorespiratory morbidity: a systematic review and meta-analysis.

BACKGROUND: The effect of extreme temperature has become an increasing public health concern. Evaluating the impact of ambient temperature on morbidity has received less attention than its impact on mortality. METHODS: We performed a systematic literature review and extracted quantitative estimates of the effects of hot temperatures on cardiorespiratory morbidity. There were too few studies on effects of cold temperatures to warrant a summary. Pooled estimates of effects of heat were calculated using a Bayesian hierarchical approach that allowed multiple results to be included from the same study, particularly results at different latitudes and with varying lagged effects. RESULTS: Twenty-one studies were included in the final meta-analysis. The pooled results suggest an increase of 3.2% (95% posterior interval = -3.2% to 10.1%) in respiratory morbidity with 1°C increase on hot days. No apparent association was observed for cardiovascular morbidity (-0.5% [-3.0% to 2.1%]). The length of lags had inconsistent effects on the risk of respiratory and cardiovascular morbidity, whereas latitude had little effect on either. CONCLUSIONS: The effects of temperature on cardiorespiratory morbidity seemed to be smaller and more variable than previous findings related to mortality.

Predictors of ED attendance in older patients with chronic disease: a data linkage study.

Objective Older people represent a large proportion of emergency department (ED) presentations, with multiple comorbidities a strong predictor of frequent attendance. This study examined associations between the general practice management received by older patients with chronic disease and ED attendance. Methods This retrospective study examined linked data from general practice and ED for patients aged ≥65 years who presented to a general practitioner (GP) between 2010 and 2014. Data from the computerised medical records of patients attending 50 general practice clinics in the inner east Melbourne region ere linked with ED attendance data from the same region. Patients with chronic disease were identified and characteristics of ED versus non-ED attendees were compared. Poisson regression was used to explore factors associated with ED usage. Results During the study period, 67474 patients aged ≥65 years visited a GP, with 63.3% identified as having at least one chronic condition and 21.4% of these having at least one ED presentation. Over 70% of the ED presentations in this group resulted in hospital admissions. The most common diagnoses for ED presentation were cardiovascular disorders, pain and injuries. ED attendance was associated with being aged ≥85 years (incidence rate ratio (IRR) 2.09; 95% confidence interval (CI) 1.96-2.11), higher socioeconomic status (IRR 1.49; 95% CI 1.45-1.53), having a GP management plan (IRR 1.47; 95% CI 1.43-1.52), multimorbidity (IRR 1.53; 95% CI 1.46-1.60), more frequent GP visits (IRR 1.10; 95% CI 1.05-1.15) and having a higher numbers of prescriptions (IRR 1.51; 95% CI 1.44-1.57). Conclusion This study suggests that ED presentation is associated with greater frailty and multimorbidity in patients. Further research is necessary to determine why higher rates of chronic disease management through GP management plans and more frequent visits did not mediate higher rates of presentation and the reasons behind the socioeconomic differences in ED presentation for patients in this age group. What is known about the topic? Increases in the volume and rate of ED presentations by older people will markedly affect emergency and acute hospital care and patient flow as the proportion of older Australians increases. What does this paper add? We used a novel and highly transferable data linkage between data collected from the clinical records of general practice patients and their associated data from ED and hospital settings and examined the relationship between GP management received by older patients with chronic disease and ED attendance. What are the implications for practitioners? Increasing utilisation of GP services may not have an effect on reducing ED attendance, particularly for older patients who may experience poorer overall health.

Survey of women's experiences of care in a new freestanding midwifery unit in an inner city area of London, England. 1: Methods and women's overall ratings of care.

OBJECTIVE: to describe and compare women's choices and experiences of maternity care before and after the opening of the Barkantine Birth Centre, a new freestanding midwifery unit in an inner city area. DESIGN: telephone surveys undertaken in late pregnancy and about six weeks after birth in two separate time periods, Phase 1 before the birth centre opened and Phase 2 after it had opened. SETTING: Tower Hamlets, a deprived inner city borough in east London, England, 2007-2010. PARTICIPANTS: 620 women who were resident in Tower Hamlets and who satisfied the Barts and the London NHS Trust's eligibility criteria for using the birth centre. Of these, 259 women were recruited to Phase 1 and 361 to Phase 2. MEASUREMENTS AND FINDINGS: women who satisfied the criteria for birth centre care and who booked antenatally for care at the birth centre were significantly more likely to rate their care as good or very good overall than corresponding women who also satisfied these criteria but booked initially at the hospital. Women who started labour care in spontaneous labour at the birth centre were significantly more likely to be cared for by a midwife they had already met, have one to one care in labour and have the same midwife with them throughout their labour. They were also significantly more likely to report that the staff were kind and understanding, that they were treated with respect and dignity and that their privacy was respected. KEY CONCLUSIONS AND IMPLICATIONS FOR PRACTICE: this survey in an inner city area showed that women who chose the freestanding midwifery unit care had positive experiences to report. Taken together with the findings of the Birthplace Programme, it adds further weight to the evidence in support of freestanding midwifery unit care for women without obstetric complications.

Survey of women's experiences of care in a new freestanding midwifery unit in an inner city area of London, England: 2. Specific aspects of care.

OBJECTIVE: to describe and compare women's experiences of specific aspects of maternity care before and after the opening of the Barkantine Birth Centre, a new freestanding midwifery unit in an inner city area. DESIGN: telephone surveys undertaken in late pregnancy and about six weeks after birth. Two separate waves of interviews were conducted, Phase 1 before the birth centre opened and Phase 2 after it had opened. SETTING: Tower Hamlets, a deprived inner city borough in east London, 2007-2010. PARTICIPANTS: 620 women who were resident in Tower Hamlets and who satisfied the Barts and the London Trust's eligibility criteria for using the birth centre. Of these, 259 women were recruited to Phase 1 and 361 to Phase 2. MEASUREMENTS AND FINDINGS: the replies women gave show marked differences between the model of care in the birth centre and that at the obstetric unit at the Royal London Hospital with respect to experiences of care and specific practices. Women who initially booked for birth centre care were more likely to attend antenatal classes and find them useful and were less likely to be induced. Women who started labour care at the birth centre in spontaneous labour were more likely to use non-pharmacological methods of pain relief, most notably water and less likely to use pethidine than women who started care at the hospital. They were more likely to be able to move around in labour and less likely to have their membranes ruptured or have continuous CTG. They were more likely to be told to push spontaneously when they needed to rather than under directed pushing and more likely to report that they had been able to choose their position for birth and deliver in places other than the bed, in contrast to the situation at the hospital. The majority of women who had a spontaneous onset of labour delivered vaginally, with 28.6 per cent of women at the birth centre but no one at the hospital delivering in water. Primiparous women who delivered at the birth centre were less likely to have an episiotomy. Most women who delivered at the birth centre reported that they had chosen whether or not to have a physiological third stage, whereas a worrying proportion at the hospital reported that they had not had a choice. A higher proportion of women at the birth centre reported skin to skin contact with their baby in the first two hours after birth. KEY CONCLUSIONS AND IMPLICATIONS FOR PRACTICE: significant differences were reported between the hospital and the birth centre in practices and information given to the women, with lower rates of intervention, more choice and significant differences in women's experiences. This case study of a single inner-city freestanding midwifery unit, linked to the Birthplace in England Research Programme, indicates that this model of care also leads to greater choice and a better experience for women who opted for it.

Exposure to ambient heat and urolithiasis among outdoor workers in Guangzhou, China.

OBJECTIVES: To assess the impact of exposure to ambient heat on urolithiasis among outdoor workers in a subtropical city of China. METHODS: The 2003-2010 health check data of a shipbuilding company in Guangzhou, China were acquired. 190 cases and 760 matched controls were involved in this study. We assessed the relationship between exposure to ambient heat and urolithiasis for different occupations using conditional logistic regression. RESULTS: Spray painters were most likely to develop urolithiasis (OR=4.4; 95% CI: 1.7, 11.4), followed by smelter workers (OR=4.0; 95% CI: 1.8, 9.2), welders (OR=3.7; 95% CI: 1.9, 7.2), production security and quality inspectors (OR=2.7; 95% CI: 1.4, 3.0), and assemblers (OR=2.2; 95% CI: 1.1, 4.3). Overall, outdoor workers were more likely to present with urolithiasis compared with indoor employees (p<0.05). In addition, workers with longer cumulative exposure time (OR=1.5; 95% CI: 1.2, 1.8) and abnormal blood pressure (OR=1.6; 95% CI: 1.0, 2.5) had higher risk for urolithiasis. CONCLUSIONS: Our findings demonstrate a significant association between exposure to ambient heat and urolithiasis among outdoor working populations. Public health intervention strategies should be developed to specifically target outdoor occupations.

Extreme temperatures and paediatric emergency department admissions.

BACKGROUND: Children are particularly vulnerable to the effects of extreme temperatures. OBJECTIVE: To examine the relationship between extreme temperatures and paediatric emergency department admissions (EDAs) in Brisbane, Australia, during 2003-2009. METHODS: A quasi-Poisson generalised linear model combined with a distributed lag non-linear model was used to examine the relationships between extreme temperatures and age-, gender- and cause-specific paediatric EDAs, while controlling for air pollution, relative humidity, day of the week, influenza epidemics, public holiday, season and long-term trends. The model residuals were checked to identify whether there was an added effect due to heat waves or cold spells. RESULTS: There were 131 249 EDAs among children during the study period. Both high (RR=1.27; 95% CI 1.12 to 1.44) and low (RR=1.81; 95% CI 1.66 to 1.97) temperatures were significantly associated with an increase in paediatric EDAs in Brisbane. Male children were more vulnerable to temperature effects. Children aged 0-4 years were more vulnerable to heat effects and children aged 10-14 years were more sensitive to both hot and cold effects. High temperatures had a significant impact on several paediatric diseases, including intestinal infectious diseases, respiratory diseases, endocrine, nutritional and metabolic diseases, nervous system diseases and chronic lower respiratory diseases. Low temperatures were significantly associated with intestinal infectious diseases, respiratory diseases and endocrine, nutritional and metabolic diseases. An added effect of heat waves on childhood chronic lower respiratory diseases was seen, but no added effect of cold spells was found. CONCLUSIONS: As climate change continues, children are at particular risk of a variety of diseases which might be triggered by extremely high temperatures. This study suggests that preventing the effects of extreme temperature on children with respiratory diseases might reduce the number of EDAs.

Assessment of the health impacts of the 2011 summer floods in Brisbane.

OBJECTIVE: To assess the effects of the 2011 floods in Brisbane, Australia, on residents' physical and mental health. METHODS: Residents who had been affected by the floods completed a community-based survey that examined the direct impact of flooding on households and their perceived physical and mental health. Outcome variables included overall and respiratory health and mental health outcomes related to psychological distress, sleep quality, and posttraumatic stress disorder (PTSD). Multivariable logistic regression was used to examine the association between flooding and perceived health outcome variables, adjusted for current health status and sociodemographic factors. RESULTS: Residents whose households were directly affected by flooding were more likely to report poor overall (Odds Ratio [OR] 5.3; 95% CI, 2.8-10.1) and respiratory (OR 2.3; 95% CI, 1.1-4.6) health, psychological distress (OR 1.9; 95% CI, 1.1-3.5), poor sleep quality (OR 2.3; 95% CI, 1.2-4.4), and probable PTSD (OR 2.3; 95% CI, 1.2-4.5). CONCLUSIONS: The 2011 Brisbane floods had significant impact on the physical and psychosocial health of residents. Improved support strategies may need to be integrated into existing disaster management programs to reduce flood-related health impacts, particularly those related to mental health.

Motivators and barriers to incorporating climate change-related health risks in environmental health impact assessment.

Climate change presents risks to health that must be addressed by both decision-makers and public health researchers. Within the application of Environmental Health Impact Assessment (EHIA), there have been few attempts to incorporate climate change-related health risks as an input to the framework. This study used a focus group design to examine the perceptions of government, industry and academic specialists about the suitability of assessing the health consequences of climate change within an EHIA framework. Practitioners expressed concern over a number of factors relating to the current EHIA methodology and the inclusion of climate change-related health risks. These concerns related to the broad scope of issues that would need to be considered, problems with identifying appropriate health indicators, the lack of relevant qualitative information that is currently incorporated in assessment and persistent issues surrounding stakeholder participation. It was suggested that improvements are needed in data collection processes, particularly in terms of adequate communication between environmental and health practitioners. Concerns were raised surrounding data privacy and usage, and how these could impact on the assessment process. These findings may provide guidance for government and industry bodies to improve the assessment of climate change-related health risks.

Is diurnal temperature range a risk factor for childhood diarrhea?

BACKGROUND: Previous studies have found that high and cold temperatures increase the risk of childhood diarrhea. However, little is known about whether the within-day variation of temperature has any effect on childhood diarrhea. METHODS: A Poisson generalized linear regression model combined with a distributed lag non-linear model was used to examine the relationship between diurnal temperature range and emergency department admissions for diarrhea among children under five years in Brisbane, from 1st January 2003 to 31st December 2009. RESULTS: There was a statistically significant relationship between diurnal temperature range and childhood diarrhea. The effect of diurnal temperature range on childhood diarrhea was the greatest at one day lag, with a 3% (95% confidence interval: 2%-5%) increase of emergency department admissions per 1°C increment of diurnal temperature range. CONCLUSION: Within-day variation of temperature appeared to be a risk factor for childhood diarrhea. The incidence of childhood diarrhea may increase if climate variability increases as predicted.