"Inaccuracy' in death certification--where are we now?

Comparison of 2 Methods for Estimating Multiple Sclerosis-Related Mortality

BACKGROUND AND OBJECTIVES

Determining whether multiple sclerosis (MS) causes death is challenging. Our objective was to contrast 2 frameworks to estimate probabilities of death attributed to MS (PMS) and other causes (Pother): the cause-specific framework (CSF), which requires the causes of death, and the excess mortality framework (EMF), which does not.

METHODS

We used data from the Observatoire Français de la Sclérose en Plaques (OFSEP, n = 37,524) and from a comparative subset where causes of death were available (4,004 women with relapsing-onset MS [R-MS]). In CSF, the probabilities were estimated using the Aalen-Johansen method. In EMF, they were estimated from the excess mortality hazard, which is the additional mortality among patients with MS as compared with the expected mortality in the matched general population. PMS values were estimated at 30 years of follow-up, (1) with both frameworks in the comparative subset, by age group at onset, and (2) with EMF only in the OFSEP population, by initial phenotype, sex, and age at onset.

RESULTS

In the comparative subset, the estimated 30-year PMS values were greater using EMF than CSF: 10.9% (95% CI 8.3-13.6) vs 8.7% (6.4-11.8) among the youngest and 20.4% (11.3-29.5) vs 16.2% (8.7-30.2) for the oldest groups, respectively. In the CSF, probabilities of death from unknown causes ranged from 1.5% (0.7-3.0) to 6.4% (2.5-16.4), and even after their reallocation, PMS values remained lower with CSF than with EMF. The estimated probabilities of being alive were close using the 2 frameworks, and the estimated POther (EMF vs CSF) was 2.6% (2.5-2.6) vs 2.1% (1.2-3.9) and 18.1% (16.9-19.3) vs 26.4% (16.5-42.2), respectively, for the youngest and oldest groups. In the OFSEP population, the estimated 30-year PMS values ranged from 7.5% (6.4-8.7) to 24.0% (19.1-28.9) in patients with R-MS and from 25.4% (21.1-29.7) to 36.8% (28.3-45.3) in primary progressive patients, depending on sex and age.

DISCUSSION

EMF has the great advantage of not requiring death certificates, their quality being less than optimal. Conceptually, it also seems more relevant because it avoids having to state, for each individual, whether death was directly or indirectly caused by MS or whether it would have occurred anyway, which is especially difficult in such chronic diseases.

Evaluation of errors in death certification by medical officers in an acute hospital

OBJECTIVES

To identify the frequency and types of errors in the Medical Certificate Cause of Death (MCCD) completed by hospital medical officers for deceased older patients.

METHODS

Among 127 deaths in a tertiary hospital acute geriatric unit between 1 July 2021 and 30 June 2022, a cause of death was documented for 116 patients (mean age 87.8, SD 5.7 years, 47% female, 39% from a nursing home). The MCCD was evaluated for errors as compared to national guidelines based on five criteria: mechanism without underlying cause; competing causes; improper sequencing; incomplete data; and use of abbreviations. The level of training of the documenting medical officer and whether the MCCD was completed out of usual working hours was evaluated with respect to errors.

RESULTS

At least one error was present in 60 (52%) of the MCCD evaluated, and there were two or more errors in 16 (14%). Most commonly, documenting competing causes of death was found in 45 (39%) of all MCCD, followed by missing data (10%) and improper sequencing (9%). MCCDs were mostly completed by postgraduate year (PGY) 1 or 2 medical officers (78%) and out-of-hours (in 72%). There was no significant difference in frequency of errors between junior and senior medical officers (p = 0.52) or if it was completed within or out-of-hours (p = 0.14).

CONCLUSIONS

The MCCD for deceased hospital patients often contained an error. Major improvement in the quality of death certification is needed among all medical officers.

Will medical cause of death certifications data quality improve in the UK with the new medical examiner system?

OBJECTIVES

There are deficits in the completeness, accuracy and timeliness of death certification internationally. In April 2023, England implemented a statutory Medical Examiners system primarily aiming to improve the quality of certification of death data. We sought to assess the current quality of death certification among general practitioners and medical examiners.

METHODS

An online survey was conducted with general practitioners and medical examiners in the Yorkshire region to determine how Medical Certifications of Cause of Death (MCCD) are completed and commonly experienced sources of errors (e.g., a lack of a reported time frame, absent or inadequate reporting of comorbidities, incorrect underlying cause-of-death, and an inaccurate sequence of events).

RESULTS

The survey was completed by general practitioners (n = 95) and medical examiners (n = 9). Participant responses, including to a hypothetical case, confirmed the quality of the certification was less variable among MEs compared to GPs, but still below international standards.

CONCLUSIONS

Efforts to enhance the quality of death certification require further consideration. Mandating a medical examiner system may not lead to intended improvements in the quality and cause of death data that form a critical component of mortality statistics that underpin health planning and monitoring.

Restoration of Life Expectancy After Transcatheter Edge-to-Edge Mitral Valve Repair

BACKGROUND

Survival data after mitral transcatheter edge-to-edge repair (TEER) are scarce, and its impact on predicted life expectancy is unknown.

OBJECTIVES

The aim of this study was to estimate the impact of TEER on postprocedural life expectancy among patients enrolled in the MitraSwiss registry through a relative survival (RS) analysis.

METHODS

Consecutive TEER patients 60 to 89 years of age enrolled between 2011 and 2018 (N = 1140) were evaluated. RS was defined as the ratio between post-TEER survival and expected survival in an age-, sex- and calendar period-matched group derived from the Swiss national 2011 to 2019 mortality tables. The primary aim was to assess 5-year survival and RS after TEER. The secondary aim was to assess RS according to the etiology of mitral regurgitation, age class and sustained procedural success over time.

RESULTS

Overall, 5-year survival after TEER was 59.3% (95% CI: 54.9%-63.4%), whereas RS reached 80.5% (95% CI: 74.6%-86.0%). RS was 91.1% (95% CI: 82.5%-98.6%) in primary mitral regurgitation (PMR) and 71.5% (95% CI: 63.0%-79.3%) in secondary mitral regurgitation (SMR). Patients 80 to 89 years of age (n = 579) showed high 5-year RS (93.0%; 95% CI: 83.3%-101.9%). In this group, restoration of predicted life expectancy was achieved in PMR with a 5-year RS of 100% (95% CI: 87.9%-110.7%), whereas sustained procedural success increased the RS rate to 90.6% (95% CI: 71.3%-107.3%) in SMR.

CONCLUSIONS

Mitral TEER in patients 80 to 89 years of age is able to restore predicted life expectancy in PMR, whereas in SMR with sustained procedural success, high RS estimates were observed. Our analysis suggests that successful, sustained mitral regurgitation reduction is key to survival improvement, particularly in patients 80 to 89 years of age.

Clustering of the causes of death in Northeast Iran: a mixed growth modeling

BACKGROUND

Processing and analyzing data related to the causes of mortality can help to clarify and monitor the health status, determine priorities, needs, deficiencies, and developments in the health sector in research and implementation areas. In some cases, the statistical population consists of invisible sub-communities, each with a pattern of different trends over time. In such cases, Latent Growth Mixture Models (LGMM) can be used. This article clusters the causes of individual deaths between 2015 and 2019 in Northeast Iran based on LGMM.

METHOD

This ecological longitudinal study examined all five-year mortality in Northeast Iran from 2015 to 2019. Causes of mortality were extracted from the national death registration system based on the ICD-10 classification. Individuals' causes of death were categorized based on LGMM, and similar patterns were placed in one category.

RESULTS

Out of the total 146,100 deaths, ischemic heart disease (21,328), malignant neoplasms (17,613), cerebrovascular diseases (11,924), and hypertension (10,671) were the four leading causes of death. According to statistical indicators, the model with three classes was the best-fit model, which also had an appropriate interpretation. In the first class, which was also the largest class, the pattern of changes in mortality due to diseases was constant (n = 98, 87.50%). Second-class diseases had a slightly upward trend (n = 10, 8.92%), and third-class diseases had a completely upward trend (n = 4, 3.57%).

CONCLUSIONS

Identifying the rising trends of diseases leading to death using LGMM can be a suitable tool for the prevention and management of diseases by managers and health policy. Some chronic diseases are increasing up to 2019, which can serve as a warning for health policymakers in society.

Evidence of cancer progression as the cause of death in men with prostate cancer in Sweden

OBJECTIVE

To assess the strength of the evidence indicative of prostate cancer (PCa) progression as the adjudicated cause of death, according to age at death and PCa risk category.

PATIENTS AND METHODS

Using data from the Prostate Cancer data Base Sweden, we identified a study frame of 5543 men with PCa registered as the cause of death according to the Cause of Death Register. We assessed the evidence of PCa progression through a review of healthcare records for a stratified sample of 495/5543. We extracted data on prostate-specific antigen levels, presence of metastases on imaging, and PCa treatments, and quantified the evidence of disease progression using a points system.

RESULTS

Both no evidence and moderate evidence for PCa progression was more common in men aged >85 years at death than those aged <85 years (29% vs 14%). Among the latter, the proportion with no evidence or moderate evidence for PCa progression was 21% for low-risk, 14% for intermediate-risk, 8% for high-risk, and 0% for metastatic PCa. In contrast, in men aged >85 years, there was little difference in the proportion with no evidence or moderate evidence of PCa progression between PCa risk categories; 31% for low-risk, 29% for intermediate-risk, 29% for high-risk, and 21% for metastatic PCa. Of the 5543 men who died from PCa, 13% (95% confidence interval 5-19%) were estimated to have either no evidence or moderate evidence of PCa progression.

CONCLUSIONS

Weak evidence for PCa progression as cause of death was more common in older men with PCa and in those with low-risk PCa. This has implications for interpretation of mortality statistics especially when assessing screening and early treatment of PCa because the beneficial effect of earlier diagnosis could be masked by erroneous adjudication of PCa as cause of death in older men, particular those with localised disease at diagnosis.

Daylight saving time affects European mortality patterns

Daylight saving time (DST) consists in a one-hour advancement of legal time in spring offset by a backward transition of the same magnitude in fall. It creates a minimal circadian misalignment that could disrupt sleep and homoeostasis in susceptible individuals and lead to an increased incidence of pathologies and accidents during the weeks immediately following both transitions. How this shift affects mortality dynamics on a large population scale remains, however, unknown. This study examines the impact of DST on all-cause mortality in 16 European countries for the period 1998-2012. It shows that mortality decreases in spring and increases in fall during the first two weeks following each DST transition. Moreover, the alignment of time data around DST transition dates revealed a septadian mortality pattern (lowest on Sundays, highest on Mondays) that persists all-year round, irrespective of seasonal variations, in men and women aged above 40.

Accuracy of death certifications of diabetes, dementia and cancer in Australia: a population-based cohort study

Background

National mortality statistics are only based on the underlying cause of death, which may considerably underestimate the effects of some chronic conditions.

Methods

The sensitivity, specificity, and positive and negative predictive values for diabetes (a common precursor to multimorbidity), dementia (a potential accelerant of death) and cancer (expected to be well-recorded) were calculated from death certificates for 9 056 women from the 1921–26 cohort of the Australian Longitudinal Study on Women’s Health. Log binomial regression models were fitted to examine factors associated with the sensitivity of death certificates with these conditions as underlying or contributing causes of death.

Results

Among women who had a record of each of these conditions in their lifetime, the sensitivity was 12.3% (95% confidence interval, 11.0%, 13.7%), 25.2% (23.7%, 26.7%) and 57.7% (55.9%, 59.5%) for diabetes, dementia and cancer, respectively, as the underlying cause of death, and 40.9% (38.8%, 42.9%), 52.3% (50.6%, 54.0%) and 67.1% (65.4%, 68.7%), respectively, if contributing causes of death were also taken into account. In all cases specificity (> 97%) and positive predictive value (> 91%) were high, and negative predictive value ranged from 69.6% to 84.6%. Sensitivity varied with age (in different directions for different conditions) but not consistently with the other sociodemographic factors.

Conclusions

Death rates associated with common conditions that occur in multimorbidity clusters in the elderly are underestimated in national mortality statistics, but would be improved if the multiple causes of death listed on a death certificate were taken into account in the statistics.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12889-022-13304-8.

Making every death count: institutional mortality accuracy at Ola During Children's Hospital, Sierra Leone

Introduction

health care data accuracy feeds the development of sound healthcare policy and the prioritisation of interventions in scarce resource environments. We designed a retrospective study at the sole paediatric government hospital in Sierra Leone to examine mortality statistics, specifically: the accuracy of mortality data collected in 2017; and the quality of cause of death (CoD) reporting for 2017.

Methods

the retrospective audit included all available mortality statistics collected at the hospital during the 2017 calendar year. For the purpose of calculating a mortality rate, admission data was additionally gathered. Four different hospital entities were identified that collected mortality data (the Monitoring and Evaluation (M&E) office; the nurse ledgers; the office of births and deaths; and the mortuary). Data from each hospital entity were used for the comparative analysis.

Results

striking differences were found in the rate of hospital mortality reported by different entities. The M&E office (responsible for providing data to the ministry of health and sanitation) reported a hospital mortality rate of 2.94% in 2017. Mortuary and nursing admissions records showed a hospital mortality rate of 18.7%. Discrepancies and issues of quality in CoD reporting between hospital entities were identified.

Conclusion

significant variations were found in the generation of official hospital mortality data. Mortality data informs health service prioritisation, resource distribution, outcome measures and epidemiological surveillance. Resources to support quality improvement initiatives are needed in the creation of an in-hospital system that reports accurate data with a process for real-time institutional data feedback.

Impact on survival of combination inhalers in patients with COPD at high risk of cardiovascular events

BACKGROUND

Chronic obstructive pulmonary disease (COPD) and cardiovascular disease often co-exist and are both leading causes of death worldwide. Published data have previously suggested trends toward improved survival for patients taking long-acting β agonists combined with inhaled corticosteroids (LABA-ICS) through beneficial actions on the respiratory and cardiovascular systems. We sought to explore this in a real-world setting.

METHODS

A population-based longitudinal propensity score-matched cohort study was conducted in the United Kingdom, 1998-2015. Patients were identified from the Clinical Practice Research Datalink (CPRD) which is linked to Hospital Episode Statistics (HES) and Office for National Statistics (ONS) mortality records. All patients had a validated diagnosis of COPD and were at high risk for cardiovascular events (history of myocardial infarction, diabetes mellitus, ischaemic heart disease, stroke and peripheral arterial disease). The primary outcome was all-cause mortality.

RESULTS

The treatment group was composed of 2687 new users of LABA-ICS with COPD and comparisons were made in a control population of 2687 COPD patients prescribed LABAs alone. At three years follow-up death occurred in 358 (13.3%) patients in the treatment group and 427 (15.9%) patients in the control group. The use of LABA-ICS was modestly associated with improved survival compared to use of LABAs (hazard ratio 0.82, 95% CI 0.71-0.95, P = 0.007).

CONCLUSIONS

Among patients with COPD with either established cardiovascular disease or at high risk of an index cardiovascular event, LABA-ICS inhaled therapy, compared with LABAs alone, was associated with a significantly improved survival.

The postmortem examination prior to cremation: Still a necessary safety measure?

BACKGROUND

The postmortem external examination has repeatedly been the subject of political and medicolegal disputes. This study was performed to examine whether the postmortem external examination at the crematory provides additional benefits and to determine whether any differences in the quality of medical death certificates exist between hospital and non-hospital postmortem external examinations.

MATERIAL AND METHODS

All cases of death that had been examined within the context of a second postmortem external examination at crematories performed by medicolegal specialists from the Hamburg Department of Legal Medicine were analyzed during a 6-month investigation period.

RESULTS

A second postmortem external examination was carried out on 9981 decedents prior to cremation during the investigation period. In the interim, the second postmortem medical examiner did not release 474 bodies (4.7%) for cremation. Suspicion of death caused by trauma was the most frequent cause for delaying the release of the body. The quality of information stated on the medical death certificate was good in 112 certificates issued by clinicians (48.9%, n = 229) and in 51 issued by general practitioners (31.3%, n = 163).

DISCUSSION

This study verified deficiencies in the initial postmortem external examination. A postmortem external examination prior to cremation by a medical professional specialized in this field is currently an indispensable component for quality assurance.

Seasonal patterns of traumatic brain injury deaths due to traffic-related incidents in the Slovak Republic

Objective: Traumatic Brain Injuries (TBIs) are an important type of injury in terms of both morbidity and mortality. Road Traffic Incidents are one of the most frequent causes of TBI. This analysis seeks to quantify the number of such injuries occurring in the Slovak Republic, and examine patterns of TBI according to mode of transport and seasonality.Methods: Data concerning total numbers of TBIs occurring from the years 1996-2015 were obtained from the Statistical Office of the Slovak Republic. The events caused by road incidents were examined separately according the external cause stated on death certification. Events were classified into seasons according to the month of death. Summary statistics were produced concerning numbers of deaths according to sex, mode of transport and season. Analyses were performed to examine trends in TBI by season and type of road user.Results: During a period of 20 years from 1996, there were 17,047 recorded deaths involving TBI in the Slovak Republic. Of these, 5,370 were caused by road traffic incidents (RTIs). Age standardized rates tended to decrease from 8.3/100,000/year (1996) to 2.5/100,000/year (2015). Males made up approximately 79% of road traffic-caused TBIs. Summer and autumn showed significantly more events than any other season, with motorcyclists and cyclists in particular being more frequently injured at this time of year.Conclusions: The results show that Slovakia, like many countries, suffers a considerable burden of TBI and that RTIs are a major contributor to this, especially among young adults. Rates of TBI vary by season in Slovakia, and users of different modes of transport appear more or less likely to suffer such injury during different seasons. Considerable variability in rates of injury exists between road users and times of year. Improved understanding of the timing and sufferers of injuries may allow better planning of response and care services. Further research into transport modes and policies aimed at safer driving should be explored.

Fall-related deaths among older adults in British Columbia: cause and effect of policy change

Background

The British Columbia Coroners Service implemented a policy in 2010 advising the reclassification of underlying causes of deaths due to falls from ‘natural’ to ‘accidental’. This study investigates whether observed data trends reflect this change in practice, are artefacts of inconsistent reporting, or indicate a true increase in fall-related deaths.

Methods

Mortality data were analysed from 2004 to 2017 for cases with International Statistical Classification of Diseases and Related Health Problems, 10th Revision fall codes W00–W19, occurring among adults aged 60 years and older.

Results

From 2010 to 2012, accidental fall-related deaths increased among those aged 80 years and older, followed by an increase in natural deaths with fall as the contributing cause.

Conclusions

Changes in reporting resulting from the 2010 policy change were observed; however, post-2012 data indicate a reversion to previous reporting practices.

Medicolegal Investigation for Cremation Clearance: How and Why?

This study on cremation clearance examines whether physical inspections detect more unnatural unreported deaths than medicolegal investigations without inspections. We reviewed all deaths reported to the medical examiner for cremation clearance during 2 distinct years and compared subsequent amendments of death certificates after 2 different investigative methodologies (1 with and 1 without physical inspection). Of 10,367 deaths in 2012, there were 86 deaths (0.83%) in which the investigation with physical inspection resulted in amendments to the death certificate. Of 11,906 deaths in 2016 without physical inspection, there were 153 that resulted in amendments (1.3%) including 2 homicides. For the detection of accidents, there was no statistically significant difference (χ = 0.8119, P = 0.367552). For cremation investigations, the work effort and costs of performing physical inspections do not appear justified given the similar detection rates (approximately 1%) for unnatural deaths among the 2 groups. Both methods, however, do detect unreported unnatural deaths.

Obscuring effect of coding developmental disability as the underlying cause of death on mortality trends for adults with developmental disability: a cross-sectional study using US Mortality Data from 2012 to 2016

OBJECTIVE

To determine whether coding a developmental disability as the underlying cause of death obscures mortality trends of adults with developmental disability.

DESIGN

National Vital Statistics System 2012-2016 US Multiple Cause-of-Death Mortality files.

SETTING

USA.

PARTICIPANTS

Adults with a developmental disability indicated on their death certificate aged 18 through 103 at the time of death. The study population included 33 154 adults who died between 1 January 2012 and 31 December 2016.

PRIMARY OUTCOME AND MEASURES

Decedents with a developmental disability coded as the underlying cause of death on the death certificate were identified using the International Statistical Classification of Diseases and Related Health Problems, Tenth Revision code for intellectual disability, cerebral palsy, Down syndrome or other developmental disability. Death certificates that coded a developmental disability as the underlying cause of death were revised using a sequential underlying cause of death revision process.

RESULTS

There were 33 154 decedents with developmental disability: 7901 with intellectual disability, 11 895 with cerebral palsy, 9114 with Down syndrome, 2479 with other developmental disabilities and 1765 with multiple developmental disabilities. Among all decedents, 48.5% had a developmental disability coded as the underlying cause of death, obscuring higher rates of choking deaths among all decedents and dementia and Alzheimer's disease among decedents with Down syndrome.

CONCLUSION

Death certificates that recorded the developmental disability in Part I of the death certificate were more likely to code disability as the underlying cause of death. While revising these death certificates provides a short-term corrective to mortality trends for this population, the severity and extent of this problem warrants a long-term change involving more precise instructions to record developmental disabilities only in Part II of the death certificate.

Are Statutory Requirements Followed in the Certification of Traumatic, Unexpected, and Unattended Deaths in Missouri?

Medical examiners and coroners (ME/Cs) investigate deaths important to public health. This cross-sectional study evaluated 343,412 death certificates from 2007 to 2012 in Missouri. We examined agreement between cause and manner of death by year and ME/C contact as well as 2010-2012 trends in ME/C contact. There was near perfect agreement between cause and manner of death when an ME/C was contacted (kappa=0.97, p < 0.0001) and a significant increase in the proportion of deaths with ME/C contact from 2010 to 2012 (p =< 0.0001). There was a significantly higher proportion of ME/C-certified deaths using the electronic system in 2010-2012 (aOR = 1.18, 95% CI 1.15, 1.21) compared to the manual system in 2007-2009. Black, non-Hispanic (aOR = 1.50, 95% CI 1.43,1.57) and Hispanic (aOR = 1.31, 95% CI 1.13, 1.51) deaths, compared to White, non-Hispanic deaths, were associated with a significantly greater odds of ME/C certification. Race as an independent predictor of ME/C death certification warrants further research.

Drug-related deaths: Statistics based on death certificates miss one-third of cases

Aims: Statistics on drug-related deaths (DRD) provide crucial information on the drug situation. The European Monitoring Centre for Drug and Drug Addiction (EMCDDA) has published a specification for extracting DRD from national mortality registers to be used in international comparisons. However, surprisingly little is known of the accuracy of DRD statistics derived from national mortality registers. This study assesses the accuracy of Swedish data derived from national mortality registers by comparing it with other sources of data. Methods: We compared five Swedish datasets. Three were derived from national mortality registers, two according to a Swedish specification and one according to the EMCDDA specification. A fourth dataset was based on toxicological analyses. We used a fifth dataset, an inventory of DRD in Stockholm, to assess the completeness and coverage of the Swedish datasets. Results: All datasets were extracted from high-quality registers, but still did not capture all DRD, and both the numbers and demographic characteristics varied considerably. However, the time trends were consistent between the selections. In international comparisons, data completeness and investigation procedures may impact even more on stated numbers. Conclusions: Basing international comparisons on numbers or rates of DRDs gives misleading results, but comparing trends is still meaningful.

Certifying Death in the United States

Accurately identifying death and its causes is integral to the compilation of mortality data and ultimately to the operation of the criminal justice and public health systems. A clear understanding of who is in charge of such processes is paramount to establishing the quality, or lack thereof, of the information provided in death certificates. Our study provides a comprehensive overview of all state statutes identifying death investigators charged with classifying and certifying death in the United States. We found that state statutes designate a broad range of individuals as responsible for the classification and certification of death. Those vary by state and set of circumstances and can include medical examiners, coroners, pathologists, other physicians, registered nurses, and more. Our findings highlight the important need for a unified standard of qualifications in the medico-legal system, as well as, regulatory reform at the state level regarding who can complete and sign death certificates.

Relative Survival After Transcatheter Aortic Valve Implantation: How Do Patients Undergoing Transcatheter Aortic Valve Implantation Fare Relative to the General Population?

BACKGROUND

Transcatheter aortic valve implantation (TAVI) is indicated for patients with aortic stenosis who are intermediate-high surgical risk. Although all-cause mortality rates after TAVI are established, survival attributable to the procedure is unclear because of competing causes of mortality. The aim was to report relative survival (RS) after TAVI, which accounts for background mortality risks in a matched general population.

METHODS AND RESULTS

National cohort data (n=6420) from the 2007 to 2014 UK TAVI registry were matched by age, sex, and year to mortality rates for England and Wales (population, 57.9 million). The Ederer II method related observed patient survival to that expected from the matched general population. We modelled RS using a flexible parametric approach that modelled the log cumulative hazard using restricted cubic splines. RS of the TAVI cohort was 95.4%, 90.2%, and 83.8% at 30 days, 1 year, and 3 years, respectively. By 1-year follow-up, mortality hazards in the >85 years age group were not significantly different from those of the matched general population; by 3 years, survival rates were comparable. The flexible parametric RS model indicated that increasing age was associated with significantly lower excess hazards after the procedure; for example, by 2 years, a 5-year increase in age was associated with 20% lower excess mortality over the general population.

CONCLUSIONS

RS after TAVI was high, and survival rates in those aged >85 years approximated those of a matched general population within 3 years. High rates of RS indicate that patients selected for TAVI tolerate the risks of the procedure well.

Impact of cause of death adjudication on the results of the European prostate cancer screening trial

BACKGROUND

The European Randomised Study of Prostate Cancer Screening has shown a 21% relative reduction in prostate cancer mortality at 13 years. The causes of death can be misattributed, particularly in elderly men with multiple comorbidities, and therefore accurate assessment of the underlying cause of death is crucial for valid results. To address potential unreliability of end-point assessment, and its possible impact on mortality results, we analysed the study outcome adjudication data in six countries.

METHODS

Latent class statistical models were formulated to compare the accuracy of individual adjudicators, and to assess whether accuracy differed between the trial arms. We used the model to assess whether correcting for adjudication inaccuracies might modify the study results.

RESULTS

There was some heterogeneity in adjudication accuracy of causes of death, but no consistent differential accuracy by trial arm. Correcting the estimated screening effect for misclassification did not alter the estimated mortality effect of screening.

CONCLUSIONS

Our findings were consistent with earlier reports on the European screening trial. Observer variation, while demonstrably present, is unlikely to have materially biased the main study results. A bias in assigning causes of death that might have explained the mortality reduction by screening can be effectively ruled out.

Determinants of excess mortality following unprotected left main stem percutaneous coronary intervention

OBJECTIVE

For percutaneous coronary intervention (PCI) to the unprotected left main stem (UPLMS), there are limited long-term outcome data. We evaluated 5-year survival for UPLMS PCI cases taking into account background population mortality.

METHODS

A population-based registry of 10 682 cases of chronic stable angina (CSA), non-ST-segment elevation acute coronary syndrome (NSTEACS), ST-segment elevation myocardial infarction with (STEMI+CS) and without cardiogenic shock (STEMI-CS) who received UPLMS PCI from 2005 to 2014 were matched by age, sex, year of procedure and country to death data for the UK populace of 56.6 million people. Relative survival and excess mortality were estimated.

RESULTS

Over 26 105 person-years follow-up, crude 5-year relative survival was 93.8% for CSA, 73.1% for NSTEACS, 77.5% for STEMI-CS and 28.5% for STEMI+CS. The strongest predictor of excess mortality among CSA was renal failure (EMRR 6.73, 95% CI 4.06 to 11.15), and for NSTEACS and STEMI-CS was preprocedural ventilation (6.25, 5.05 to 7.75 and 6.92, 4.25 to 11.26, respectively). For STEMI+CS, the strongest predictor of excess mortality was preprocedural thrombolysis in myocardial infarction (TIMI) 0 flow (2.78, 1.87 to 4.13), whereas multivessel PCI was associated with improved survival (0.74, 0.61 to 0.90).

CONCLUSIONS

Long-term survival following UPLMS PCI for CSA was high, approached that of the background populace and was significantly predicted by co-morbidity. For NSTEACS and STEMI-CS, the requirement for preprocedural ventilation was the strongest determinant of excess mortality. By contrast, among STEMI+CS, in whom survival was poor, the strongest determinant was preprocedural TIMI flow. Future cardiovascular cohort studies of long-term mortality should consider the impact of non-cardiovascular deaths.

Mesothelioma from asbestos exposures: Epidemiologic patterns and impact in the United States

Mesothelioma, a rare tumor, is highly correlated with asbestos exposure. Mesothelioma, similar to all asbestos-related diseases, is dose/intensity dependent to some degree, and studies showed the risk of mesothelioma rises with cumulative exposures. Multiple processes occur in an individual before mesothelioma occurs. The impact of mesothelioma in the United States has been continuous over the last half century, claiming between 2,000 and 3,000 lives each year. Mesothelioma is a preventable tumor that is more frequently reported as associated with asbestos exposure among men than women. However, the rate of asbestos-associated mesothelioma is on the rise among women due to better investigation into their histories of asbestos exposure. It is of interest that investigators detected asbestos-associated cases of mesothelioma in women from nonoccupational sources-that is, bystander, incidental, or take-home exposures. It is postulated that asbestos-associated mesotheliomas, in both men and women, are likely underreported. However, with the implementation of the most recent ICD-10 coding system, the correlation of mesothelioma with asbestos exposure is expected to rise to approximately 80% in the United States. This study examined the demographic and etiological nature of asbestos-related mesothelioma.

Reported co-infection deaths are more common in early adulthood and among similar infections

BACKGROUND

Many people have multiple infections at the same time, but the combined contribution of those infections to disease-related mortality is unknown. Registered causes of death offer a unique opportunity to study associations between multiple infections.

METHODS

We analysed over 900,000 death certificates that reported infectious causes of death. We tested whether reports of multiple infections (i.e., co-infections) differed across individuals' age or sex. We also tested whether each pair of infections were reported together more or less often than expected by chance, and whether this co-reporting was associated with the number of biological characteristics they had in common.

RESULTS

In England and Wales, and the USA, 10 and 6 % respectively of infection-related deaths involved co-infection. Co-infection was reported reported most often in young adults; 30 % of infection-related deaths among those aged 25-44 from the USA, and 20 % of infection-related deaths among those aged 30-39 from England and Wales, reported multiple infections. The proportion of infection-related deaths involving co-infection declined with age more slowly in males than females, to less than 10 % among those aged >65. Most associated pairs of infections co-occurred more often than expected from their frequency of being reported alone (488/683 [71 %] in the USA, 129/233 [55 %] in England and Wales), and tended to share biological characteristics (taxonomy, transmission mode, tropism or timescale).

CONCLUSIONS

Age, sex, and biologically similar infections are associated with death from co-infection, and may help indicate patients at risk of severe co-infection.

[Mortality follow-up of the German Health Interview and Examination Survey for Adults (DEGS) : methods and first results]

OBJECTIVES

Within the framework of the German Health Interview and Examination Survey for Adults (DEGS), the Robert Koch Institute (RKI) conducted a nationwide mortality follow-up study. As there is no national mortality register in Germany, mortality and causes of death were investigated individually and under observance of state-specific data protection conditions.

METHODS

The German Health Interview and Examination Survey 1998 (GNHIES98) provided the database including 7,124 participants aged 18-79 years. A total of 6,979 participants of GNHIES98 (98 %) who consented to be re-contacted were invited between October 2008 and October 2011 to also participate in the first data collection wave of DEGS (DEGS1). In this context, the vital status and the causes of death for deceased participants were assessed. Age- and sex-specific probabilities of survival and death rates were calculated and grouped by main causes of death according to ICD-10 groups.

RESULTS

A total of 671 individuals (285 women, 386 men) died between the two survey contacts. For all deceased persons the date of death and for 539 (80.3 %) the causes of death could be determined. With a median follow-up time of 12.0 years, 8,0742.5 person years were available for survival analysis. The crude overall death rate amounted to 8.3 per 1,000 persons-years (women: 7.2; men: 9.5). Among 539 persons with available information on causes of death, 209 (38.8 %) were attributable to cardiovascular diseases, 188 (34.9 %) to cancer, 135 (25.0 %) to other causes, and seven (1.3 %) could not be unambiguously assigned.

CONCLUSIONS

A mortality follow-up was successfully integrated in the longitudinal component of DEGS as part of the national health monitoring at the RKI. Death rates and cause-specific mortality in relation to highly prevalent chronic diseases and risk factors provide essential information for assessing the potential of prevention and quality of care among adults in Germany. This requires a regular and complete conduction of mortality follow-ups.

5 year mortality predictors in 498,103 UK Biobank participants: a prospective population-based study

BACKGROUND

To our knowledge, a systematic comparison of predictors of mortality in middle-aged to elderly individuals has not yet been done. We investigated predictors of mortality in UK Biobank participants during a 5 year period. We aimed to investigate the associations between most of the available measurements and 5 year all-cause and cause-specific mortality, and to develop and validate a prediction score for 5 year mortality using only self-reported information.

METHODS

Participants were enrolled in the UK Biobank from April, 2007, to July, 2010, from 21 assessment centres across England, Wales, and Scotland with standardised procedures. In this prospective population-based study, we assessed sex-specific associations of 655 measurements of demographics, health, and lifestyle with all-cause mortality and six cause-specific mortality categories in UK Biobank participants using the Cox proportional hazard model. We excluded variables that were missing in more than 80% of the participants and all cardiorespiratory fitness test measurements because summary data were not available. Validation of the prediction score was done in participants enrolled at the Scottish centres. UK life tables and census information were used to calibrate the score to the overall UK population.

FINDINGS

About 500,000 participants were included in the UK Biobank. We excluded participants with more than 80% variables missing (n=746). Of 498,103 UK Biobank participants included (54% of whom were women) aged 37-73 years, 8532 (39% of whom were women) died during a median follow-up of 4·9 years (IQR 4·33-5·22). Self-reported health (C-index including age 0·74 [95% CI 0·73-0·75]) was the strongest predictor of all-cause mortality in men and a previous cancer diagnosis (0·73 [0·72-0·74]) was the strongest predictor of all-cause mortality in women. When excluding individuals with major diseases or disorders (Charlson comorbidity index >0; n=355 043), measures of smoking habits were the strongest predictors of all-cause mortality. The prognostic score including 13 self-reported predictors for men and 11 for women achieved good discrimination (0·80 [0·77-0·83] for men and 0·79 [0·76-0·83] for women) and significantly outperformed the Charlson comorbidity index (p<0·0001 in men and p=0·0007 in women). A dedicated website allows the interactive exploration of all results along with calculation of individual risk through an online questionnaire.

INTERPRETATION

Measures that can simply be obtained by questionnaires and without physical examination were the strongest predictors of all-cause mortality in the UK Biobank population. The prediction score we have developed accurately predicts 5 year all-cause mortality and can be used by individuals to improve health awareness, and by health professionals and organisations to identify high-risk individuals and guide public policy.

FUNDING

Knut and Alice Wallenberg Foundation and the Swedish Research Council.

Reliable mortality statistics for Turkey: Are we there yet?

BACKGROUND

The Turkish government has implemented several reforms to improve the Turkish Statistical Institute Death Reporting System (TURKSTAT-DRS) since 2009. However, there has been no assessment to evaluate the impact of these reforms on causes of death statistics. This study attempted to analyse the impact of these reforms on the TURKSTAT-DRS for Turkey, and in the case of Izmir, one of the most developed provinces in Turkey.

METHODS

The evaluation framework comprised three main components each with specific criteria. Firstly, data from TURKSTAT for Turkey and Izmir for the periods 2001-2008 and 2009-2013 were assessed in terms of the following dimensions that represent quality of mortality statistics (a. completeness of death registration, b. trends in proportions of deaths with ill-defined causes). Secondly, the quality of information recorded on individual death certificates from Izmir in 2010 was analysed for a. missing information, b. timeliness of death notifications and c. characteristics of deaths with ill-defined causes. Finally, TURKSTAT data were analysed to estimate life tables and summary mortality indicators for Turkey and Izmir, as well as the leading causes-of-death in Turkey in 2013.

RESULTS

Registration of adult deaths in Izmir as well as at the national level for Turkey has considerably improved since the introduction of reforms in 2009, along with marked decline in the proportions of deaths assigned ill-defined causes. Death certificates from Izmir indicated significant gaps in recorded information for demographic as well as epidemiological variables, particularly for infant deaths, and in the detailed recording of causes of death. Life expectancy at birth estimated from local data is 3-4 years higher than similar estimates for Turkey from international studies, and this requires further investigation and confirmation.

CONCLUSION

The TURKSTAT-DRS is now an improved source of mortality and cause of death statistics for Turkey. The reliability and validity of TURKSTAT data needs to be established through a detailed research program to evaluate completeness of death registration and validity of registered causes of death. Similar evaluation and data analysis of mortality indicators is required at regular intervals at national and sub-national level, to increase confidence in their utility as primary data for epidemiology and health policy.

Cause-specific or relative survival setting to estimate population-based net survival from cancer? An empirical evaluation using women diagnosed with breast cancer in Geneva between 1981 and 1991 and followed for 20 years after diagnosis

BACKGROUND

Both cause-specific and relative survival settings can be used to estimate net survival, the survival that would be observed if the only possible underlying cause of death was the disease under study. Both resulting net survival estimators are biased by informative censoring and prone to biases related to the data settings within which each is derived. We took into account informative censoring to derive theoretically unbiased estimators and examine which of the two data settings was the most robust against incorrect assumptions in the data.

PATIENTS AND METHODS

We identified 2489 women in the Geneva Cancer Registry, diagnosed with breast cancer between 1981 and 1991, and estimated net survival up to 20-years using both cause-specific and relative survival settings, by tackling the informative censoring with weights. To understand the possible origins of differences between the survival estimates, we performed sensitivity analyses within each setting. We evaluated the impact of misclassification of cause of death and of using inappropriate life tables on survival estimates.

RESULTS

Net survival was highest using the cause-specific setting, by 1% at one year and by up to around 11% twenty years after diagnosis. Differences between both sets of net survival estimates were eliminated after recoding between 15% and 20% of the non-specific deaths as breast cancer deaths. By contrast, a dramatic increase in the general population mortality rates was needed to see the survival estimates based on relative survival setting become closer to those derived from cause-specific setting.

CONCLUSION

Net survival estimates derived using the cause-specific setting are very sensitive to misclassification of cause of death. Net survival estimates derived using the relative-survival setting were robust to large changes in expected mortality. The relative survival setting is recommended for estimation of long-term net survival among patients with breast cancer.

Phenoxy herbicides, soft-tissue sarcoma and non-Hodgkin lymphoma: a systematic review of evidence from cohort and case-control studies

BACKGROUND

Phenoxy herbicides have been used widely in agriculture, forestry, parks and domestic gardens. Early studies linked them with soft-tissue sarcoma (STS) and non-Hodgkin lymphoma (NHL), but when last reviewed by the International Agency for Research on Cancer in 1986, the evidence for human carcinogenicity was limited.

SOURCES OF DATA

We searched Medline and Embase, looking for cohort or case-control studies that provided data on risk of STS and/or NHL in relation to phenoxy herbicides, and checked the reference lists of relevant publications for papers that had been missed.

AREAS OF AGREEMENT, AREAS OF CONTROVERSY

The extensive evidence is not entirely consistent, and a hazard of STS or NHL cannot firmly be ruled out. However, if there is a hazard, then absolute risks must be small.

GROWING POINTS, AREAS TIMELY FOR DEVELOPING RESEARCH

Extended follow-up of previously assembled cohorts may be the most efficient way of further reducing uncertainties.

Difficulties in recording mortality resulting from drug abuse

It is considered, according to statements from different sources, that data on the number of deaths in the population of a certain country or region are accurate and correct, but determining causes of death is, for different reasons, often incorrect. There is, therefore,a justified doubt that there are more inaccurately registered drug abuse-related deaths in state registries. Hence, this paper tends to show the most frequent difficulties encountered when recording mortality resulting from drug abuse.

Medical-setting deaths and the coroner: laws, penalties and guidelines

We examine the law governing the reporting of medical-setting deaths to the Coroner throughout the Australian states and territories. We use a hypothetical case report to explore the different legal requirements for reporting a medical-setting death and the varying penalties that apply for failing to report a reportable death. It is important for health practitioners to understand the law that applies in the state or territory in which they practice. Knowing when to report a medical-setting death requires not only medical knowledge but also legal analysis. On this basis, we recommend the development of coroners' guidelines in all jurisdictions to assist health practitioners in complying with their coronial reporting obligations.

Contribution of respiratory tract infections to child deaths: a data linkage study

Background

Respiratory tract infections (RTIs) are an important cause of death in children, and often contribute to the terminal decline in children with chronic conditions. RTIs are often underrecorded as the underlying cause of death; therefore the overall contribution of RTIs to child deaths and the potential preventability of RTI-related deaths have not been adequately quantified.

Methods

We analysed deaths in children resident in England who died of non-injury causes aged 28 days to 18 years between 2001 and 2010 using death certificates linked to a longitudinal hospital admission database. We defined deaths as RTI-related if RTIs or other respiratory conditions were recorded on death certificates or linked hospital records up to 30 days before death. We examined trends in mortality by age group, year and season (winter or summer) and determined the winter excess of RTI-related deaths using rate differencing techniques. We estimated the proportion of RTI-related deaths in children with chronic conditions.

Results

22.4% (5039/22509) of child deaths were RTI-related. RTI-related deaths declined by 2.3% per year in infants aged 28 to 364 days between 2001 and 2010. No decline was observed for older children. On average there were 161 winter excess RTI-related deaths annually, accounting for 32% of all RTI-related deaths. 89.0% of children with RTI-related deaths had at least one chronic condition; neurological conditions were the most prevalent.

Conclusions

RTI-related deaths have not declined in the last decade except in infants. Targeted strategies to prevent the winter excess of RTIs and to treat RTIs in children, particularly children with chronic conditions, may reduce RTI-related deaths.

Electronic supplementary material

The online version of this article (doi:10.1186/1471-2458-14-1191) contains supplementary material, which is available to authorized users.

Accounting for outcome misclassification in estimates of the effect of occupational asbestos exposure on lung cancer death

In studies of the health effects of asbestos, lung cancer death is subject to misclassification. We used modified maximum likelihood to explore the effects of outcome misclassification on the rate ratio of lung cancer death per 100 fiber-years per milliliter of cumulative asbestos exposure in a cohort study of textile workers in Charleston, South Carolina, followed from 1940 to 2001. The standard covariate-adjusted estimate of the rate ratio was 1.94 (95% confidence interval: 1.55, 2.44), and modified maximum likelihood produced similar results when we assumed that the specificity of outcome classification was 0.98. With sensitivity assumed to be 0.80 and specificity assumed to be 0.95, estimated rate ratios were further from the null and less precise (rate ratio = 2.17; 95% confidence interval: 1.59, 2.98). In the present context, standard estimates for the effect of asbestos on lung cancer death were similar to estimates accounting for the limited misclassification. However, sensitivity analysis using modified maximum likelihood was needed to verify the robustness of standard estimates, and this approach will provide unbiased estimates in settings with more misclassification.

End-of-life communication: a retrospective survey of representative general practitioner networks in four countries

CONTEXT

Effective communication is central to high-quality end-of-life care.

OBJECTIVES

This study examined the prevalence of general practitioner (GP)-patient discussion of end-of-life topics (according to the GP) in Italy, Spain, Belgium, and The Netherlands and associated patient and care characteristics.

METHODS

This cross-sectional, retrospective survey was conducted with representative GP networks. Using a standardized form, GPs recorded the health and care characteristics in the last three months of life, and the discussion of 10 end-of-life topics, of all patients who died under their care. The mean number of topics discussed, the prevalence of discussion of each topic, and patient and care characteristics associated with discussions were estimated per country.

RESULTS

In total, 4396 nonsudden deaths were included. On average, more topics were discussed in The Netherlands (mean=6.37), followed by Belgium (4.45), Spain (3.32), and Italy (3.19). The topics most frequently discussed in all countries were "physical complaints" and the "primary diagnosis," whereas "spiritual and existential issues" were the least frequently discussed. Discussions were most prevalent in The Netherlands, followed by Belgium. The GPs from all countries tended to discuss fewer topics with older patients, noncancer patients, patients with dementia, patients for whom palliative care was not an important treatment aim, and patients for whom their GP had not provided palliative care.

CONCLUSION

The prevalence of end-of-life discussions varied across the four countries. In all countries, training priorities should include the identification and discussion of spiritual and social problems and early end-of-life discussions with older patients, those with cognitive decline if possible, and those with non-malignant diseases.

Accuracy of cause of death data routinely recorded in a population-based cancer registry: impact on cause-specific survival and validation using the Geneva Cancer Registry

BACKGROUND

Information on the underlying cause of death of cancer patients is of interest because it can be used to estimate net survival. The population-based Geneva Cancer Registry is unique because registrars are able to review the official cause of death. This study aims to describe the difference between the official and revised cause-of-death variables and the impact on cancer survival estimates.

METHODS

The recording process for each cause of death variable is summarised. We describe the differences between the two cause-of-death variables for the 5,065 deceased patients out of the 10,534 women diagnosed with breast cancer between 1970 and 2009. The Kappa statistic and logistic regression are applied to evaluate the degree of concordance. The impact of discordance on cause-specific survival is examined using the Kaplan Meier method.

RESULTS

The overall agreement between the two variables was high. However, several subgroups presented a lower concordance, suggesting differences in calendar time and less attention given to older patients and more advanced diseases. Similarly, the impact of discordance on cause-specific survival was small on overall survival but larger for several subgroups.

CONCLUSION

Estimation of cancer-specific survival could therefore be prone to bias when using the official cause of death. Breast cancer is not the more lethal cancer and our results can certainly not be generalised to more lethal tumours.

The changing profile of infant mortality from bacterial, viral and fungal infection over two decades

AIM

Infection is an important cause of neonatal and infant mortality. We evaluated changes in infant deaths from infections from 1988 to 2008 in the North of England.

METHODS

We interrogated a population-based survey and reviewed infant deaths from infection. Proportional contribution to deaths, pathogens identified and risk factors were analysed.

RESULTS

Thirteen percentage of 4366 infant deaths from a population of 704 536 livebirths were infectious. The absolute numbers of infant deaths from infection fell over time but the proportion of deaths from infection increased (12.1%, 13.6% and 14.9%). Significantly preterm infants were increasingly represented in successive epochs (14%, 24% and 38%). Infant mortality rate (IMR) from meningococcus and Group B Streptococcus (GBS) fell in the latest epoch, but there was a corresponding increase from Escherichia coli and candida.

DISCUSSION

This large study shows that infections have become proportionately more important causes of death especially in very preterm infants. Recent significant reductions in death from meningococcus and GBS are likely to represent successful achievements of vaccination and antibiotic prophylactic policies. Increases in IMR from E. coli may relate to GBS prophylaxis and increases in candida to the increase from preterm populations. Further efforts to understand these changing patterns and develop additional prevention and treatment strategies and vaccines remain an urgent priority.

Does quality control of death certificates in hospitals have an impact on cause of death statistics?

BACKGROUND

The effects of inaccurate death certificates on cause of death statistics are uncertain. Since 2008, Akershus University Hospital has systematically corrected all death certificates. The effects of these corrections on the total cause of death statistics from the hospital were studied.

MATERIAL AND METHOD

ICD-10 codes for the underlying cause of death on the original and the corrected death certificates issued by Akershus University Hospital were retrieved from the Cause of Death Registry for the period 1 May 2008-31 December 2009, once the Cause of Death Registry had processed the death certificates with the aid of the computer program ACME (Automatic Classification of Medical Entities).

RESULTS

Altogether 1,001 deaths were investigated (547 men and 454 women). A total of 223 death certificates were corrected. This entailed changing the underlying cause of death in 176 cases. Death certificates for women were corrected most frequently. In 121 cases, the changes entailed a change of disease chapter in ICD-10. The corrections caused a significant reduction in the number of unspecific diagnoses, such as sepsis, cardiac arrest, pneumonia with no further specification, renal failure and fractures without any specific cause. There was a significant exchange of individuals within all the large diagnostic groups, with the exception of cancer. Because of the balancing effect of exchanges within and between the disease chapters, this generated only minor effects on general statistics on causes of death.

INTERPRETATION

The continuous correction of death certificates in the hospital was important for adjustments at the individual level and as a quality control of cause of death statistics, but had only minor effects on the general statistics from the hospital.

Death certificate completion skills of hospital physicians in a developing country

BACKGROUND

Death certificates (DC) can provide valuable health status data regarding disease incidence, prevalence and mortality in a community. It can guide local health policy and help in setting priorities. Incomplete and inaccurate DC data, on the other hand, can significantly impair the precision of a national health information database. In this study we evaluated the accuracy of death certificates at a tertiary care teaching hospital in a Karachi, Pakistan.

METHODS

A retrospective study conducted at Aga Khan University Hospital, Karachi, Pakistan for a period of six months. Medical records and death certificates of all patients who died under adult medical service were studied. The demographic characteristics, administrative details, co-morbidities and cause of death from death certificates were collected using an approved standardized form. Accuracy of this information was validated using their medical records. Errors in the death certificates were classified into six categories, from 0 to 5 according to increasing severity; a grade 0 was assigned if no errors were identified, and 5, if an incorrect cause of death was attributed or placed in an improper sequence.

RESULTS

223 deaths occurred during the study period. 9 certificates were not accessible and 12 patients had incomplete medical records. 202 certificates were finally analyzed. Most frequent errors pertaining to patients' demographics (92%) and cause/s of death (87%) were identified. 156 (77%) certificates had 3 or more errors and 124 (62%) certificates had a combination of errors that significantly changed the death certificate interpretation. Only 1% certificates were error free.

CONCLUSION

A very high rate of errors was identified in death certificates completed at our academic institution. There is a pressing need for appropriate intervention/s to resolve this important issue.