Ambient nitrogen dioxide is associated with emergency hospital visits for atrial fibrillation: a population-based case-crossover study in Reykjavik, Iceland

BACKGROUND

In Iceland air quality is generally good; however, previous studies indicate that there is an association between air pollution in Reykjavik and adverse health effects as measured by dispensing of medications, mortality, and increase in health care utilisation. The aim was to study the association between traffic-related ambient air pollution in the Reykjavik capital area and emergency hospital visits for heart diseases and particularly atrial fibrillation and flutter (AF).

METHODS

A multivariate time-stratified case-crossover design was used to study the association. Cases were those patients aged 18 years or older living in the Reykjavik capital area during the study period, 2006-2017, who made emergency visits to Landspitali University Hospital for heart diseases. In this population-based study, the primary discharge diagnoses were registered according to International Classification of Diseases, 10th edition (ICD-10). The pollutants studied were NO₂, PM₁₀, PM_2.5, and SO_2, with adjustment for H₂S, temperature, and relative humidity. The 24-h mean of pollutants was used with lag 0 to lag 4.

RESULTS

During the study period 9536 cases of AF were identified. The 24-h mean NO₂ was 20.7 μg/m³. Each 10 μg/m³ increase in NO₂ was associated with increased risk of heart diseases (ICD-10: I20-I25, I44-I50), odds ratio (OR) 1.023 (95% CI 1.012-1.034) at lag 0. Each 10 μg/m³ increase in NO₂ was associated with an increased risk of AF (ICD-10: I48) on the same day, OR 1.030 (95% CI: 1.011-1.049). Females were at higher risk for AF, OR 1.051 (95% CI 1.019-1.083) at lag 0, and OR 1.050 (95% CI 1.019-1.083) at lag 1. Females aged younger than 71 years had even higher risk for AF, OR 1.077 (95% CI: 1.025-1.131) at lag 0. Significant associations were found for other pollutants and emergency hospital visits, but they were weaker and did not show a discernable pattern.

CONCLUSIONS

Short-term increase in NO₂ concentrations was associated with heart diseases, more precisely with AF. The associations were stronger among females, and among females at younger age. This is the first study in Iceland that finds an association between air pollution and cardiac arrhythmias, so the results should be interpreted with caution.

[Three years experience in the detection and follow-up of violence against the elderly in a tertiary hospital]

OBJECTIVES

The Hospital Clínico San Carlos Committee against violence established a protocol in 2012 in order to detect and follow-up violence against elderly persons. This article presents the experience after 3years of its introduction, as well as an analysis comparing the differences between those younger and older than 65years of age.

MATERIAL AND METHODS

All cases were collected during years 2013, 2014, and 2015, and were divided into two groups, A and B, according to age, younger or older than 65years. Parameters studied were: gender, place of detection (emergency department, during hospital admission, or outpatient clinics), type of professional worker who detected each case (social workers, nurses, or physicians), previous history of violence, type of aggression (physical, psychological, financial), institutional procedures once aggression was confirmed, and deaths after one year of follow-up. The SPPS v.18.0 package was used for the statistical analysis.

RESULTS

A total of 172 cases were detected, of which 140 of them were included in groupA (<65years), and 32 in groupB (>65 years, 22.8%). Gender: GroupA: women: 93.5%. GroupB: women: 78.1% (P=.014). Registration site: GroupA: emergency department: 90.7%, hospital wards: 6.4%, outpatient wards: 3.0. GroupB: emergency department: 65.6%, hospital wards: 31.6%, outpatient wards: 2.8% (P=.001). Notification: GroupA: social worker: 25%, physician: 67.8%, nurse: 6.4%. GroupB: social worker: 65.2%, physician: 28.1%, nurse: 6.2% (P<.001). Previous violence history: GroupA: 62.1%. GroupB: 68.7%. Type of abuse: GroupA: physical: 56.4%, psychological: 2.8%, physical +psychological: 30.4%, physical +psychological +economic: 10.1%. GroupB: physical: 31.1%, psychological: 5.1%, neglect: 18.7%, physical +psychological: 10.1, physical +psychological +economic: 9.8, economic: 25.1 (P<.0001). Resources employed and follow-up: Injuries: Group A: 63.5%. Group B: 31.2% (P=.001). Judicial protection measures: GroupA: 12.8. GroupB: 15.6 (P=.773). Removal order: GroupA: 2.1. GroupB: 6.25 (P=.235). More than one-third of patients in groupB, and none of the patients in groupA, died in the year of follow-up.

CONCLUSIONS

There are more problems detected in the Emergency Department. There is a history of previous violence in more than half of the cases in both age groups. The profile of the victim is an elderly woman with significant physical and cognitive impairment. Economic abuse and neglect are more frequent in the elderly population. In our series, more than one-third of elderly patients who are victims of ill-treatment die each year. The hospital registry is fundamental for the detection and follow-up of abuse in the elderly.

Injury factors associated with discharge status from emergency room at two major trauma hospitals in The Gambia, Africa

INTRODUCTION

Injuries are the leading cause of disability across all ages and gender. In this study, we identified predictors of discharge status and disability at discharge among patients who seek emergency room treatment.

MATERIALS AND METHODS

The study was conducted in two major trauma hospitals in urban Gambia. 1905 patients participated in the study. 74.9% were males, and 25.1% were females. The study includes injured patients from all mechanisms. However, patients' records without age, gender, injury mechanism, and deposition from the emergency room were considered incomplete and excluded. We examined distributions of injury by age, gender, mechanism, place of occurrence, intent, primary body part injured, and primary nature of injury. We identified demographic and injury characteristics associated with hospital admission (compared to emergency department discharge) and discharge disability (any level of disability compared with none).

RESULTS

The leading mechanisms of injury were road traffic (26.1%), struck by objects (22.1%), cut/pierce (19.2%), falls (19.2%), and burns (5.4%). Injuries most commonly occurred in the home (36.7%) and on the road (33.2%). For those aged 19-44, the proportion of injuries due to assault was higher for females (35.9%) than males (29.7%). Males had increased odds for admission (aOR=1.48 95% CI=1.15-1.91) and for disability (aOR=1.45; 95% CI=1.06-1.99). Increased odds for admission were found for brain injuries, fractures, large system injuries, and musculoskeletal injuries when compared with soft tissue injuries. The highest odds for any level of discharge disability were found for brain injuries, fractures, injuries from falls, burns, and road traffic.

CONCLUSIONS

Epidemiology of injuries in The Gambia is similar to other low-income countries. However, the magnitude of cases and issues uncovered highlights the need for a formal registry.