Pakistan's Emergency Medical Services (EMS) system & out-of-hospital-cardiac-arrest (OHCA): A narrative review of an EMS system of a low middle income country in context of OHCA.

Pakistan's Emergency Medical Services (EMS) are a critical component of its healthcare system, providing pre-hospital emergency care across a nation with over 220 million people. This article explores the evolutionary journey of Pakistan's EMS, highlighting both the challenges it faces and the strides it has made, with a specific emphasis on patients experiencing out-of-hospital cardiac arrest (OHCA). To extract relevant information, we searched MEDLINE & Embase data bases using MeSH terms "Emergency Medical Services" OR "EMS" AND "Out-of-Hospital-Cardiac-Arrest" OR "OHCA" AND "Pakistan". In addition, we also retrieved information from the EMS leadership in Pakistan through e-mails. We delve into the significance of key performance indicators for OHCA, advocate for the establishment of OHCA registries to improve patient outcomes, address regional disparities in pre-hospital care, and acknowledge the gradual progress of the EMS system.

Derivation of the Difficult Airway Physiological Score (DAPS) in adults undergoing endotracheal intubation in the emergency department.

BACKGROUND: Prediction of serious outcomes among patients with physiological instability is crucial in airway management. In this study, we aim to develop a score to predict serious outcomes following intubation in critically ill adults with physiological instability by using clinical and laboratory parameters collected prior to intubation. METHOD: This single-center analytical cross-sectional study was conducted in the Emergency Department from 2016 to 2020. The airway score was derived using the transparent reporting of a multivariable prediction model for individual prognosis or diagnosis (TRIPOD) methodology. To gauge model's performance, the train-test split technique was utilized. The discrete random number generation approach was used to divide the dataset into two groups: development (training) and validation (testing). The validation dataset's instances were used to calculate the final score, and its validity was measured using ROC analysis and area under the curve (AUC). By computing the Youden's J statistic using the metrics sensitivity, specificity, positive predictive value, and negative predictive value, the discriminating factor of the additive score was determined. RESULTS: The mean age of the 1021 patients who needed endotracheal intubations was 52.2 years (± 17.5), and 632 (62%) of them were male. In the development dataset, there were 527 (64.9%) physiologically difficult airways, 298 (36.7%) post-intubation hypotension, 124 (12%) cardiac arrest, 347 (42.7%) shock index > 0.9, and 456 [56.2%] instances of pH < 7.3. On the contrary, in the validation dataset, there were 143 (68.4%) physiologically difficult airways, 33 (15.8%) post-intubation hypotension, 41 (19.6%) cardiac arrest, 87 (41.6%) shock index > 0.9, and 121 (57.9%) had pH < 7.3, respectively. There were 12 variables in the difficult airway physiological score (DAPS), and a DAPS of 9 had an area under the curve of 0.857. The accuracy of DAPS was 77%, the sensitivity was 74%, the specificity was 83.3%, and the positive predictive value was 91%. CONCLUSION: DAPS demonstrated strong discriminating ability for anticipating physiologically challenging airways. The proposed model may be helpful in the clinical setting for screening patients who are at high risk of deterioration.

Clinical utility of routine investigations and risk factors of end-organ damage in asymptomatic severe hypertension.

Asymptomatic severe hypertension is defined as systolic blood pressure of ≥ 180 mmHg or diastolic blood pressure of ≥ 120 mmHg without signs and symptoms of end-organ damage or dysfunction. Literature shows that around 5% of the patients with severe asymptomatic hypertension had acute hypertension-related end-organ damage. This study aimed to determine the clinical utility of routine investigations and risk factors of end-organ damage in patients presented to the emergency department with  asymptomatic severe hypertension. This single-center, cross-sectional study was conducted at the emergency department of the Aga Khan University Hospital, Karachi, Pakistan, from January 2018 to December 2020. All adult patients (age ≥ 18 years) presented to the emergency department with a systolic blood pressure of ≥ 180 or diastolic blood pressure of ≥ 120 mmHg without any signs and symptoms of end-organ damage (e.g., chest pain, unilateral limb or facial weakness, or hemiplegia, altered mental status, shortness of breath, decreased urine output, and sudden-onset of severe headache) were included. Routine investigations were analyzed to detect end-organ damage, including complete blood count, basic metabolic panel, urine detailed report, electrocardiogram, and troponin-I. Multivariable binary logistic regression was applied to identify the risk factors of end-organ damage considering the significant p value of ≤ 0.05. A total of 180 patients were presented to the emergency department with asymptomatic severe hypertension during the study period. Among the total patients, 60 patients (33.3%) had abnormal investigation findings; out of them, new-onset end-organ damage was diagnosed in 15 patients (8.3%). The most common end-organ damage was the kidney (73.3%) followed by the heart (26.6%). The multivariable binary logistic regression showed that age of more than 60 years, past medical history of diabetes, ischemic heart disease, and cerebrovascular accident were significantly associated with a higher risk of end-organ damage (p < 0.05). The study identified a higher prevalence of abnormal routine investigations and acute end-organ damage in emergency department patients with asymptomatic severe hypertension compared to high-income countries and suggested a lower threshold for end-organ damage screening in these patients. The current recommendations of foregoing further workup in patients with asymptomatic severe hypertension may need modification for emergency departments in low-middle-income countries if similar associations are replicated in other settings.

Trends in mortality related to unintentional poisoning in the South Asian region from 1990 to 2019: analysis of data from the Global Burden of Disease Study.

OBJECTIVE: This study aimed to estimate the burden of unintentional poisoning in South Asian countries from 1999 to 2019. DESIGN: An ecological study conducted at the regional level for South Asian countries, based on data from the Global Burden of Disease Study 2019. SETTING: We extracted unintentional poisoning data from the Global Burden of Disease Study data set from 1990 to 2019 to assess trends in mortality, disability-adjusted life-years (DALYs), years of life lost, years lived with disability (YLDs) and causative agents in South Asian countries (Bangladesh, Bhutan, India, Nepal and Pakistan). OUTCOME MEASURES: We determined the per cent change and 95% CI for the period between 1990 and 2019 by age, gender and country. We also conducted Poisson regression to measure the percentage change in the rate per year. RESULTS: The absolute number of deaths due to unintentional poisoning in South Asia decreased (-32.6%) from 10 558 deaths in 1990 to 7112 deaths in 2019. The age standardised death rate from unintentional poisoning in South Asia has seen a downward trend (-55.88%), declining from 0.87 (0.67-1.01) age-standardised per 100 000 population in 1990 to 0.41 (0.34-0.47) in 2019. Among age groups, under 9 years and 10-19 years have seen downward trends for death and DALYs, accounting for -93.5% and -38.3%, respectively. YLDs have seen an upward trend (5.9%), increasing from 10 461.7 per 100 000 in 1990 to 11 084 per 100 000 in 2019. YLDs in women increased by 7.4%, from 11 558.2 per 100 000 to 12 418.3 per 100 000. The incidence rate ratios (IRRs) adjusted by all age groups and gender for DALYs in all South Asian countries has reduced significantly (IRR 0.97, 95% CI 0.96 to 0.97) from 1990 to 2019. CONCLUSION: This study showed reduction in death and DALYs due to unintentional poisoning in South Asia except YLDs which is showing an increasing trend. Public health systems should continue efforts to minimise and prevent disabilities arising from unintentional poisoning in South Asia.

Follow-up household assessment for child unintentional injuries two years after the intervention: A community-based study from Karachi, Pakistan.

BACKGROUND: Unintentional childhood injuries are a growing public health concern, and the home is the most common location for non-fatal injuries in children less than 5 years of age. This study describes the long-term effects of two injury prevention educational interventions for caregivers-an educational pamphlet and an in-home tutorial guide-by comparing the change in the prevalence of home injury hazards before and after the interventions. METHODS: This was a pre- (June and July 2010) and post-study with short-term follow-up (November-December 2010) and long-term follow-up (November 2012- January 2013). Neighborhood one included households that received only educational pamphlets after completing a baseline assessment; neighborhood two included households that received an in-home tutorial guide after completing the baseline assessment and receiving the educational pamphlet. The main outcome of this study was the reduction in home injury hazards for children under 5 years of age. RESULTS: A total of 312 households participated in the long-term phase to compare the effect of the interventions. Between the short-term to long-term follow-up, injury hazards significantly reduced in neighborhood two compared to neighborhood one. These included fall hazards (walker use) (IRR 0.24 [95% CI 0.08-0.71]), drowning hazards (open bucket of water in the courtyard and uncovered water pool) (IRR 0.45 [95% CI 0.85-0.98] and IRR 0.46 [95% CI 0.76-0.94]), burn hazards (iron, water heater within reach of child) (IRR 0.56 [95% CI 0.33-0.78] and IRR 0.58 [95% CI 0.32-0.91]), poisoning hazards (shampoo/soap and medicine within reach of child) (IRR 0.53 [95% CI 0.44-0.77] and IRR 0.7 [95% CI 0.44-0.98]) and breakable objects within reach of child (IRR 0.62 [95% CI: 0.39-0.99]). CONCLUSION: An injury prevention tutorial to caretakers of children supplemented with pamphlets could significantly decrease the incidence of falls, drowning, burns, poisoning, and cut injury hazards for children under 5 years of age in their homes in a low-resource setting. This intervention has the potential to be integrated in existing public health programs, such as Lady Health Visitors (LHVs), to disseminate injury prevention information in routine home health visits.

Acceptability of telephone-cardiopulmonary resuscitation (T-CPR) practice in a resource-limited country- a cross-sectional study.

BACKGROUND: T-CPR has been shown to increase bystander CPR rates dramatically and is associated with improved patient survival. OBJECTIVE: To evaluate the acceptability of T-CPR by the bystanders and identify baseline quality measures of T-CPR in Karachi, Pakistan. METHODS: A cross-sectional study was conducted from January to December 2018 at the Aman foundation command and control center. Data was collected from audiotaped phone calls of patients who required assistance from the Aman ambulance and on whom the EMS telecommunicator recognized the need for CPR and provided instructions. Information was recorded using a structured questionnaire on demographics, the status of the patient, and different time variables involved in CPR performance. A One-way ANOVA was used to compare different time variables with recommended AHA guidelines. P-value ≤ 0.05 was considered significant. RESULTS: There were 481 audiotaped calls in which CPR instruction was given, listened to, and recorded data. Out of which in 459(95.4%) of cases CPR was attempted Majority of the patients were males (n = 278; 57.8%) and most had witnessed cardiac arrest (n = 470; 97.7%) at home (n = 430; 89.3%). The mean time to recognize the need for CPR by an EMS telecommunicator was 4:59 ± 1:59(min), while the mean time to start CPR instruction by a bystander was 5:28 ± 2:24(min). The mean time to start chest compression was 6:04 ± 1:52(min.). CONCLUSION: Our results show the high acceptability of T-CPR by bystanders. We also found considerable delays in recognizing cardiac arrest and initiation of CPR by telecommunicators. Further training of telecommunicators could reduce these delays.

Out of hospital cardiac arrest: experience of a bystander CPR training program in Karachi, Pakistan.

BACKGROUND: Nearly 90% of out-of-hospital cardiac arrest (OHCA) patients are witnessed, yet only 2.3% received bystander cardiopulmonary resuscitation (CPR) in Pakistan. This study aimed to determine retention of knowledge and skills of Hands-Only CPR among community participants in early recognition of OHCA and initiation of CPR in Karachi, Pakistan. METHODS: Pre and post-tests were conducted among CPR training participants from diverse non-health-related backgrounds from July 2018 to October 2019. Participants were tested for knowledge and skills of CPR before training (pre-test), immediately after training (post-test), and 6 months after training (re-test). All the participants received CPR training through video and scenario-based demonstration using manikins. Post-training CPR skills of the participants were assessed using a pre-defined performance checklist. The facilitator read out numerous case scenarios to the participants, such as drowning, poisoning, and road traffic injuries, etc., and then asked them to perform the critical steps of CPR identified in the scenario on manikins. The primary outcome was the mean difference in the knowledge score and skills of the participants related to the recognition of OHCA and initiation of CPR. RESULTS: The pre and post-tests were completed by 652 participants, whereas the retention test after 6 months was completed by 322 participants. The mean knowledge score related to the recognition of OHCA, and initiation of CPR improved significantly (p < 0.001) from pre-test [47.8/100, Standard Deviation (SD) ±13.4] to post-test (70.2/100, SD ±12.1). Mean CPR knowledge after 6 months (retention) reduced slightly from (70.2/100, ±12.1) to (66.5/100, ±10.8). CPR skill retention for various components (check for scene safety, check for response, check for breathing and correct placement of the heel of hands) deteriorated significantly (p < 0.001) from 77.9% in the post-test to 72.8% in re-test. Participants performed slightly better on achieving an adequate rate of chest compressions from 73.1% in post-test to 76.7% in re-test (p 0.27). CONCLUSION: Community members with non-health backgrounds can learn and retain CPR skills, allowing them to be effective bystander CPR providers in OHCA situations. We recommend mass population training in Pakistan for CPR to increase survival from OHCA.

Impact of community education on heat-related health outcomes and heat literacy among low-income communities in Karachi, Pakistan: a randomised controlled trial.

BACKGROUND: Extreme heat exposure is a growing public health concern. In this trial, we tested the impact of a community health worker (CHW) led heat education programme on all-cause mortality, unplanned hospital visits and changes in knowledge and practices in Karachi, Pakistan. METHODS: The Heat Emergency Awareness and Treatment trial was a community-based, open-label, two-group, unblinded cluster-randomised controlled trial that implemented a CHW-led educational intervention between March and May 2018 in Karachi, Pakistan. We randomly assigned (1:1) 16 clusters, each with ~185 households or 1000 population, to the intervention or usual care (control group). We collected data on all-cause mortality, unplanned hospital visits, evidence of heat illness through surveillance and a knowledge and practice survey during the summer months of 2017 (preintervention) and 2018 (postintervention). FINDINGS: We recruited 18 554 participants from 2991 households (9877 individuals (1593 households) in the control group and 8668 individuals (1398 households) in the intervention group). After controlling for temporal trends, there was a 38% (adjusted OR 0.62, 95% CI 0.49 to 0.77) reduction in hospital visits for any cause in the intervention group compared with the control group. In addition, there was an improvement in many areas of knowledge and practices, but there was no significant difference in all-cause mortality. INTERPRETATION: A CHW-led community intervention was associated with decreased unscheduled hospital visits, improved heat literacy and practices but did not impact all-cause mortality. CHWs could play an essential role in preparing communities for extreme heat events. TRIAL REGISTRATION NUMBER: NCT03513315.

Understanding factors impacting global priority of emergency care: a qualitative policy analysis.

INTRODUCTION: The high burden of emergency medical conditions has not been met with adequate financial and political prioritisation especially in low and middle-income countries. We examined the factors that have shaped the priority of global emergency care and highlight potential responses by emergency care advocates. METHODS: We conducted semistructured interviews with key experts in global emergency care practice, public health, health policy and advocacy. We then applied a policy framework based on political ethnography and content analysis to code for underlying themes. RESULTS: We identified problem definition, coalition building, paucity of data and positioning, as the main challenges faced by emergency care advocates. Problem definition remains the key issue, with divergent ideas on what emergency care is, should be and what solutions are to be prioritised. Proponents have struggled to portray the urgency of the issue in a way that commands action from decision-makers. The lack of data further limits their effectiveness. However, there is much reason for optimism given the network's commitment to the issue, the emerging leadership and the existence of policy windows. CONCLUSION: To improve global priority for emergency care, proponents should take advantage of the emerging governance structure and build consensus on definitions, generate data-driven solutions, find strategic framings and engage with non-traditional allies.

Effective Community-Based Interventions for the Prevention and Management of Heat-Related Illnesses: A Scoping Review.

BACKGROUND: Extreme temperatures have negative consequences on the environment, ecosystem, and human health. With recent increases in global temperatures, there has been a rise in the burden of heat-related illnesses, with a disproportionate impact on low- and middle-income countries. Effective population-level interventions are critical to a successful public health response. OBJECTIVE: This scoping review aims to summarize the evidence on the effectiveness of population-level heat-related interventions and serve as a potential guide to the implementation of these interventions. METHODS: Studies that evaluated the effectiveness of community-based interventions to mitigate or reduce the impact of extreme heat on heat-related mortality and morbidity were sought by searching four electronic databases. Studies published in the English language and those that had quantifiable, measurable mortality, morbidity or knowledge score outcomes were included. RESULTS: The initial electronic search yielded 2324 articles, and 17 studies were included. Fourteen studies were based in high-income countries (HICs) (Europe, US, Canada) and discussed multiple versions of (1) heat action plans, which included but were not limited to establishing a heat monitoring system, informative campaigns, the mobilization of health care professionals, volunteers, social workers and trained caregivers in the surveillance and management of individuals with known vulnerabilities, or stand-alone (2) education and awareness campaigns. Multi-pronged heat action plans were highly effective in reducing heat-related mortality and morbidity, especially among vulnerable populations such as the elderly and those with chronic conditions. CONCLUSIONS: The heat action plans covered in these studies have shown promising results in reducing heat-related mortality and morbidity and have included instituting early warning systems, building local capacity to identify, prevent or treat and manage heat-related illnesses, and disseminating information. Nevertheless, they need to be cost-effective, easy to maintain, ideally should not rely on a mass effort from people and should be specifically structured to meet the local needs and resources of the community.

Heat Emergencies: Perceptions and Practices of Community Members and Emergency Department Healthcare Providers in Karachi, Pakistan: A Qualitative Study.

Heat waves are the second leading cause of weather-related morbidity and mortality affecting millions of individuals globally, every year. The aim of this study was to understand the perceptions and practices of community residents and healthcare professionals with respect to identification and treatment of heat emergencies. A qualitative study was conducted using focus group discussions and in-depth interviews, with the residents of an urban squatter settlement, community health workers, and physicians and nurses working in the emergency departments of three local hospitals in Karachi. Data was analyzed using content analysis. The themes that emerged were (1) perceptions of the community on heat emergencies; (2) recognition and early treatment at home; (3) access and quality of care in the hospital; (4) recognition and treatment at the health facility; (5) facility level plan; (6) training. Community members were able to recognize dehydration as a heat emergency. Males, elderly, and school-going children were considered at high risk for heat emergencies. The timely treatment of heat emergencies was widely linked with availability of financial resources. Limited availability of water, electricity, and open public spaces were identified as risk factors for heat emergencies. Home based remedies were reported as the preferred practice for treatment by community members. Both community members and healthcare professionals were cognizant of recognizing heat related emergencies.

Estimation of the burden of out-of-hospital traumatic cardiac arrest in Karachi, Pakistan, using a cross-sectional capture-recapture analysis.

BACKGROUND: The burden of trauma-related-out-of-hospital cardiac arrest (OHCA) in developing countries like Pakistan remains largely unexplored due to a lack of organized pre-hospital systems. In order to estimate the burden, we used a two-sample capture-recapture method which has been used in several domains to estimate difficult-to-count populations. METHODS: We obtained 3-month data from two sources: Records of two major EMS (emergency medical services) systems and five major hospitals providing coverage to the city's population. All adults with traumatic OHCA were included. Information on variables such as name, age, gender, date and time of arrest, cause of arrest, and destination hospital were obtained for these cases and data were compared to obtain a matched sample. Utilizing an equation and different levels of restrictive criteria, estimates were obtained for burden. RESULTS: The EMS records reported 788 and hospital records reported 344 cases of traumatic OHCA. The capture-recapture analysis estimated the annual traumatic OHCA incidence as 45.7/100,000 (95% CI: 44.2 to 47.3). Estimation of the burden from individual hospital or EMS records underestimated and calculated only 14.6% and 33.9% of the total burden, respectively. Most of the traumatic arrest victims had gunshot wound (GSW) (65.2%) followed by road traffic injuries (RTI) (20.8%). CONCLUSION: The actual burden of traumatic OHCA in Pakistan is larger than the burden reported by either the hospitals or EMS services alone. Most of the cases occurred due to GSW and RTI. A multipronged approach is required to manage the problem; from prevention to developing organized trauma care systems and training lay responders in pre-hospital trauma care is vital.

Burden of out-of-hospital cardiac arrest in Karachi, Pakistan: Estimation through the capture-recapture method.

OBJECTIVE: To assess the application of capture-recapture method as a potential strategy to estimate the incidence of out-of-hospital cardiac arrest. METHODS: This cross-sectional study was carried out from January to April 2013 in Karachi and comprised three public general hospitals, one public cardiac hospital, one private general hospital and two ambulance services. Two-sample capture-recapture method was used: first capture was through cardiac arrest data from two major emergency medical services and second capture was from the five teaching hospitals. Records from the hospitals and ambulance services were compared on 7 variables; name, age, gender, date and time of arrest, cause of arrest and destination hospital. Matched and unmatched cases were used in the equation to estimate the incidence of out-of-hospital cardiac arrest. RESULTS: Of the 630 out-of-hospital cardiac arrest cases reported, 191(30.3%) related to the emergency medical services records and 439(69.7%) to hospital records. The capture-recapture identified only 9(1.4%) matched cases even with the least restrictive criteria and estimated the annual out-of-hospital cardiac arrest incidence as 166/100,000 population (95% confidence interval: 142.9 to 189.6). CONCLUSIONS: Capture-recapture method could be a potential alternative for providing population level data in the absence of organised health information systems.

Characteristics of traumatic out-of-hospital cardiac arrest patients presenting to major centers in Karachi, Pakistan-a longitudinal cohort study.

BACKGROUND: Trauma is the leading cause of death for adults under 44 years of age. Survival after traumatic out-of-hospital cardiac arrest (OHCA) has been reported to be poor, and its epidemiology is not well defined. A few studies have reported better survival in response to pre-hospital life-saving interventions. Currently, no published data on traumatic cardiac arrests in the field exist from low- and lower middle-income countries. We aimed to explore the epidemiology and outcomes of traumatic OHCA patients from Karachi, Pakistan. We conducted a longitudinal cohort study at emergency departments (ED) of five major public and private hospitals of the city from January to April 2013. Data was collected on all adult patients (age 18 years or more) presenting to the hospitals directly from field with cardiac arrest and history of trauma using a structured questionnaire. Patients with do-not-resuscitate status and those referred from other hospitals were excluded. RESULTS: During 3 months, a total of 187 patients were enrolled with mean age of 35.1 years. About 95% were men, and 68.4% had a penetrating injury. Even though half of the patients had a witnessed arrest, none received a bystander cardiopulmonary resuscitation (CPR). 83.4% were brought to the hospital in an ambulance, with median response and scene times of 3 and 2 min respectively; however, only 3 received any pre-hospital life-support interventions. One hundred eighty-one patients (96.7%) were pronounced dead on arrival to the ED, and of the remaining 6 patients, 4 received CPR in the EDs. Overall survival at the end of ED stay was 0%. Patients who received life-support interventions survived for longer time, though not clinically significant, as compared to those who did not (45 min vs. 35 min, p = 0.02). CONCLUSION: There was no survival after a traumatic OHCA in Karachi, Pakistan. Even though ambulances reached the scene in a very short time, pre-hospital interventions were largely absent. There is a strong need to strengthen our pre-hospital care system but most importantly train the general public to deal with emergencies and be able to provide timely bystander CPR.

Implementation of the World Health Organization Trauma Care Checklist Program in 11 Centers Across Multiple Economic Strata: Effect on Care Process Measures.

BACKGROUND: Trauma contributes more than ten percent of the global burden of disease. Initial assessment and resuscitation of trauma patients often requires rapid diagnosis and management of multiple concurrent complex conditions, and errors are common. We investigated whether implementing a trauma care checklist would improve care for injured patients in low-, middle-, and high-income countries. METHODS: From 2010 to 2012, the impact of the World Health Organization (WHO) Trauma Care Checklist program was assessed in 11 hospitals using a stepped wedge pre- and post-intervention comparison with randomly assigned intervention start dates. Study sites represented nine countries with diverse economic and geographic contexts. Primary end points were adherence to process of care measures; secondary data on morbidity and mortality were also collected. Multilevel logistic regression models examined differences in measures pre- versus post-intervention, accounting for patient age, gender, injury severity, and center-specific variability. RESULTS: Data were collected on 1641 patients before and 1781 after program implementation. Patient age (mean 34 ± 18 vs. 34 ± 18), sex (21 vs. 22 % female), and the proportion of patients with injury severity scores (ISS) ≥ 25 (10 vs. 10 %) were similar before and after checklist implementation (p > 0.05). Improvement was found for 18 of 19 process measures, including greater odds of having abdominal examination (OR 3.26), chest auscultation (OR 2.68), and distal pulse examination (OR 2.33) (all p < 0.05). These changes were robust to several sensitivity analyses. CONCLUSIONS: Implementation of the WHO Trauma Care Checklist was associated with substantial improvements in patient care process measures among a cohort of patients in diverse settings.

Epidemiology and outcomes of out-of-hospital cardiac arrest in a developing country-a multicenter cohort study.

BACKGROUND: Out-of-hospital cardiac arrest (OHCA) is one of the leading causes of death and disability worldwide. Overall survival after an OHCA has been reported to be poor and limited studies have been conducted in developing countries. We aimed to investigate the rates of survival from OHCA and explore components of the chain of survival in a developing country. METHODS: We conducted a multicenter prospective cohort study in the emergency departments (ED) of five major public and private sector hospitals of Karachi, Pakistan from January 2013 to April 2013. Twenty-four hour data collection was performed by trained data collectors, using a structured questionnaire. All patients ≥18 years of age, presenting with OHCA of cardiac origin, were included. Patients with do-not-resuscitate status or referred from other hospitals were excluded. Our primary outcome was survival of OHCA patients at the end of ED stay. RESULTS: During the three month period, data was obtained from 310 OHCA patients. The overall survival to ED discharge was 1.6 % which decreased to 0 % at 2-months after discharge. More than half (58.3 %) of these OHCA patients were brought to the hospital in a non-EMS (emergency medical service) vehicle i.e. public or private transportation. Patients utilizing non-EMS transportation reached the hospital earlier with a median time of 23 min compared to patients utilizing any type of ambulances which had a delay of 7 min hospital reaching time (median time 30 min). However, patients utilizing ambulances with life-support facilities, as compared to all other types of pre-hospital transportation, had the shortest time to first life-support intervention (15 min). Most of the patients (92.9 %) had a witnessed cardiac arrest out of which only a small percentage (2.3 %) received bystander CPR (cardio pulmonary resuscitation). Median time from arrest to receiving first CPR was 20 min. Only 1 % of patients were found to have a shockable rhythm on first assessment. CONCLUSION: This study showed that the overall survival of OHCA is null in this population. Lack of bystander CPR and weaker emergency medical services (EMS) leading to a delay in receiving life-support interventions were some of the important observations. Poor survival emphasizes the need to standardize EMS systems, initiate public awareness programs and strengthen links in the chain of survival.

Differences in risk-adjusted outcome of road traffic injuries in urban tertiary care centers of Pakistan.

OBJECTIVE: To assess the differences in road injury survival in three tertiary care hospitals in an urban setting. METHODS: The study was conducted in and comprised all road traffic injury victims presenting to the three state-run tertiary care centres in Karachi from September 2006 to October 2009. Patients' age, gender, mode, and delay in arrival, severity of injury were noted. Data was stratified by hospital of presentation. A logistic regression model was developed and probability of survival was assessed after adjusting for various risk factors, including patient characteristics and injury severity. RESULTS: There were 93,657victims in the study, but complete information was missing in 6,458(6.89%) study subjects, including survival information. Overall, 83,837(89.5%) were males; 64,269(74%) were aged between 16 and 45 years; 84,016(95%) had injury severity score of ?15; and overall survival was 84,141(96.5%). CONCLUSIONS: Significant differences existed in risk-adjusted survival of road injury victims presenting to public hospitals of Karachi. These differences pointed to variations in the process of care, and highlighted opportunities for improvement.

Study Protocol: Validation and Adaptation of community-worker-administered stroke symptom questionnaire in a periurban Pakistani community to determine disease burden.

BACKGROUND: Stroke is the second leading cause of mortality and the leading cause of disability in the world today. The disease burden is on the rise in developing nations, but there is scarcity of data from these regions to inform policy decisions. Stroke burden can be determined by clinical diagnosis alone in the public health context and is a far more feasible way to assess disease status in low- to middle-income countries like Pakistan. We aim to translate and adapt a validated stroke symptom questionnaire, train community health workers in its administration, and verify it against assessment by two trained neurologists. METHODS/DESIGN: This is a prospective study, which we aim to carry out in Ibrahim Hyderi, a periurban slum of Karachi. We translated into Urdu the questionnaire for verifying stroke free status (QVSFS), which is an internationally validated tool to assess the same. Two community health workers (CHW) will be identified and will receive training by neurologists, which will include teaching regarding stroke pathophysiology, symptomatology, and detection. They will be familiarized with the QVSFS, and their questionnaire administration will be assessed through roleplay. We intend to recruit 322 subjects from the same community and the CHWs will gather data on them. The same subjects will later be assessed by two trained neurologists, and the findings collaborated to validate those obtained by the CHWs. Sensitivity, specificity, positive and negative predictive values, and Cohen's kappa will be determined for the CHW-administered questionnaire tested against assessment by two neurologists together and separately for the two CHWs. Data analysis will be done using SPSS version 19.0. DISCUSSION: The results of this study will determine if and how well CHW-administered questionnaires are at assessing stroke status in a community. This will facilitate use of the same as a practical alternative for stroke surveillance in the country. TRIAL REGISTRATION: NCT02073955.

Country level economic disparities in child injury mortality.

BACKGROUND: Injuries are a neglected cause of child mortality globally and the burden is unequally distributed in resource poor settings. The aim of this study is to explore the share and distribution of child injury mortality across country economic levels and the correlation between country economic level and injuries. METHODS: All-cause and injury mortality rates per 100,000 were extracted for 187 countries for the 1-4 age group and under 5s from the Global Burden of Disease Study 2010. Countries were grouped into four economic levels. Gross domestic product (GDP) per capita was used to determine correlation with injury mortality. RESULTS: For all regions and country economic levels, the share of injuries in all-cause mortality was greater when considering the 1-4 age group than under 5s, ranging from 36.6% in Organization for Economic Cooperation and Development countries to 10.6% in Sub-Saharan Africa. Except for Sub-Saharan Africa, there is a graded association between country economic level and 1-4 injury mortality across regions, with all low-income countries having the highest rates. Except for the two regions with the highest overall injury mortality rates, there is a significant negative correlation between GDP and injury mortality in Latin America and the Caribbean, Eastern Europe/Central Asia, Asia East/South-East and Pacific and North Africa/ Middle East. CONCLUSIONS: Child injury mortality is unevenly distributed across regions and country economic level to the detriment of poorer countries. A significant negative correlation exists between GDP and injury in all regions, exception for the most resource poor where the burden of injuries is highest.

Can trained field community workers identify stroke using a stroke symptom questionnaire as well as neurologists? Adaptation and validation of a community worker administered stroke symptom questionnaire in a peri-urban Pakistani community.

BACKGROUND: Stroke is a leading cause of morbidity and mortality worldwide. There is a paucity of data from South Asia where stroke is highly prevalent. Validated tools administrable by community health workers (CHWs) are required to identify stroke in the community in a resource-strapped region such as this. METHODS: The study was conducted in a transitional slum in Karachi, Pakistan. Questionnaire to Verify Stroke-Free Status (QVSFS) was adapted and translated into Urdu. Two CHWs, trained by a neurologist, selected 322 community-dwelling subjects using purposive sampling. Each CHW collected data independently, which was validated by a vascular neurologist who directly examined each participant. To assess the effect of audit and feedback, data from the final 10% of the subjects were collected after a second training session for the CHWs. Sensitivity, specificity, and Cohen kappa were determined for the CHW-administered questionnaire against neurovascular assessment. RESULTS: Mean age of participants was 56.5 years with 71% of participants being women. The sensitivity and specificity of the questionnaire of detecting stroke was 77.1% (confidence interval [CI], 64.1-86.9) and 85.8% (CI, 83.5-87.5), respectively. The chance-corrected agreement using the Cohen kappa statistic was .51 (CI, .38-.60). Kappa ranged from .37 to .58 for each of the 7 stroke symptoms. Hemianesthesia (72.9%) and hemiplegia (64.6%) were the most sensitive symptoms. The performance and agreement improved from moderate to substantial after audit and feedback. CONCLUSIONS: We found a reasonable sensitivity and specificity and moderate agreement between CHW-administered QVSFS and assessment by a vascular neurologist.