Dataset Information

Trends in diagnostic patterns and mortality in emergency ambulance service patients in 2007-2014: a population-based cohort study from the North Denmark Region.

ABSTRACT:

Objective

Demand for ambulances is growing. Nevertheless, knowledge is limited regarding diagnoses and outcomes in patients receiving emergency ambulances. This study aims to examine time trends in diagnoses and mortality among patients transported with emergency ambulance to hospital.

Design

Population-based cohort study with linkage of Danish national registries.

Setting

The North Denmark Region in 2007-2014.

Participants

Cohort of 148 757 patients transported to hospital by ambulance after calling emergency services.

Main outcome measures

The number of emergency ambulance service patients, distribution of their age, sex, hospital diagnoses, comorbidity, and 1-day and 30-day mortality were assessed by calendar year. Poisson regression with robust variance estimation was used to estimate both age-and sex-adjusted relative risk of death and prevalence ratios for Charlson Comorbidity Index (CCI) to allow comparison by year, with 2007 as reference year.

Results

The annual number of emergency ambulance service patients increased from 24.3 in 2007 to 40.2 in 2014 per 1000 inhabitants. The proportions of women increased from 43.1% to 46.4%?and of patients aged 60+ years from 39.9% to 48.6%, respectively. The proportion of injuries gradually declined, non-specific diagnoses increased, especially the last year. Proportion of patients with high comorbidity (CCI?3) increased from 6.4% in 2007 to 9.4% in 2014, corresponding to an age- and sex-adjusted prevalence ratio of 1.27 (95% CI 1.16 to 1.39). The 1-day and 30?day mortality decreased from 2.40% to 1.21%?and from 5.01% to 4.36%, respectively, from 2007 to 2014, corresponding to age-adjusted and sex-adjusted relative risk of 0.43 (95% CI 0.37 to 0.50) and 0.72 (95% CI 0.66 to 0.79), respectively.

Conclusion

During the 8-year period, the incidence of emergency ambulance service patients, the proportion of women, elderly, and non-specific diagnoses increased. The level of comorbidity increased substantially, whereas the 1-day and 30-day mortality decreased.

SUBMITTER: Christensen EF

PROVIDER: S-EPMC5724206 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature

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Publications

Trends in diagnostic patterns and mortality in emergency ambulance service patients in 2007-2014: a population-based cohort study from the North Denmark Region.

Christensen Erika Frischknecht EF Bendtsen Mette Dahl MD Larsen Thomas Mulvad TM Jensen Flemming Bøgh FB Lindskou Tim Alex TA Holdgaard Hans Ole HO Hansen Poul Anders PA Johnsen Søren Paaske SP Christiansen Christian Fynbo CF

BMJ open 20170821 8

<h4>Objective</h4>Demand for ambulances is growing. Nevertheless, knowledge is limited regarding diagnoses and outcomes in patients receiving emergency ambulances. This study aims to examine time trends in diagnoses and mortality among patients transported with emergency ambulance to hospital.<h4>Design</h4>Population-based cohort study with linkage of Danish national registries.<h4>Setting</h4>The North Denmark Region in 2007-2014.<h4>Participants</h4>Cohort of 148 757 patients transported to h ...[more]

PMID: 28827233

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Project description:BackgroundEmergency departments handle a large proportion of acute patients. In 2007, it was recommended centralizing the Danish healthcare system and establishing emergency departments as the main common entrance for emergency patients. Since this reorganization, few studies describing the emergency patient population in this new setting have been carried out and none describing diagnoses and mortality. Hence, we aimed to investigate diagnoses and 1- and 30-day mortality of patients in the emergency departments in the North Denmark Region during 2014-2016.MethodsPopulation-based historic cohort study in the North Denmark Region (580,000 inhabitants) of patients with contact to emergency departments during 2014-2016. The study included patients who were referred by general practitioners (daytime and out-of-hours), by emergency medical services or who were self-referred. Primary diagnoses (ICD-10) were retrieved from the regional Patient Administrative System. For non-specific diagnoses (ICD-10 chapter 'Symptoms and signs' and 'Other factors'), we searched the same hospital stay for a specific diagnosis and used this, if one was given. We performed descriptive analysis reporting distribution and frequency of diagnoses. Moreover, 1- and 30-day mortality rate estimates were performed using the Kaplan-Meier estimator.ResultsWe included 290,590 patient contacts corresponding to 166 ED visits per 1000 inhabitants per year. The three most frequent ICD-10 chapters used were 'Injuries and poisoning' (38.3% n = 111,274), 'Symptoms and signs' (16.1% n = 46,852) and 'Other factors' (14.52% n = 42,195). Mortality at day 30 (95% confidence intervals) for these chapters were 0.86% (0.81-0.92), 3.95% (3.78-4.13) and 2.84% (2.69-3.00), respectively. The highest 30-day mortality were within chapters 'Neoplasms' (14.22% (12.07-16.72)), 'Endocrine diseases' (8.95% (8.21-9.75)) and 'Respiratory diseases' (8.44% (8.02-8.88)).ConclusionsPatients in contact with the emergency department receive a wide range of diagnoses within all chapters of ICD-10, and one third of the diagnoses given are non-specific. Within the non-specific chapters, we found a 30-day mortality, surpassing several of the more organ specific ICD-10 chapters.Trial registrationObservational study - no trial registration was performed.

Project description:ObjectivesThe aim of this study is to determine diagnostic patterns in the prehospital paediatric population, age distribution, the level of monitoring and the treatment initiated in the prehospital paediatric case. Hypothesis was that advanced prehospital interventions are rare in the paediatric patient population.SettingWe performed a retrospective population-based registry cohort study of children attended by a physician-staffed emergency medical service (EMS) unit (P-EMS), in the Odense area of Denmark during a 10-year study period.ParticipantsWe screened 44 882 EMS contacts and included 5043 children. Patient characteristics, monitoring and interventions performed by the P-EMS crews were determined.ResultsWe found that paediatric patients were a minority among patients attended by P-EMS units: 11.2% (10.9 to 11.5) (95% CI) of patients were children. The majority of the children were <5 years old; one-third being <2 years old. Respiratory problems, traffic accidents and febrile seizures were the three most common dispatch codes. Oxygen supplementation, intravenous access and application of a cervical collar were the three most common interventions. Oxygen saturation and heart rate were documented in more than half of the cases, but more than one-third of the children had no vital parameters documented. Only 22% of the children had respiratory rate, saturation, heart rate and blood pressure documented. Prehospital invasive procedures such as tracheal intubation (n=74), intraosseous access (n=22) and chest drainage (n=2) were infrequently performed.ConclusionPrehospital paediatric contacts are uncommon, more frequently involving smaller children. Monitoring or at least documentation of basic vital parameters is infrequent and may be an area for improvement. Advanced and potentially life-saving prehospital interventions provide a dilemma since these likely occur too infrequently to allow service providers to maintain their technical skills working solely in the prehospital environment.

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Dataset Information

Trends in diagnostic patterns and mortality in emergency ambulance service patients in 2007-2014: a population-based cohort study from the North Denmark Region.

Objective

Design

Setting

Participants

Main outcome measures

Results

Conclusion

Publications

Trends in diagnostic patterns and mortality in emergency ambulance service patients in 2007-2014: a population-based cohort study from the North Denmark Region.

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