Papers by Benjamin Massenburg
ePlasty: Open Access Journal of Plastic and Reconstructive Surgery, Sep 30, 2015
The objective of this study was to evaluate the frequency of various postoperative complications ... more The objective of this study was to evaluate the frequency of various postoperative complications in patients undergoing either immediate or delayed breast reconstruction after mastectomy for malignancy. The ACS-NSQIP 2005-2012 database was queried for patients who underwent mastectomy for the treatment of breast malignancy. These mastectomy cases were then stratified, generating "mastectomy alone" and "mastectomy with immediate reconstruction" cohorts. Database analysis also identified "delayed-reconstruction" oncologic patients. All patients undergoing reconstruction were then stratified into the tissue expander/implant or flap-based reconstruction group. The frequency of postoperative complications was assessed. A multiplicative risk model was used to calculate the probability of postoperative complications after undergoing a mastectomy alone, followed by reconstruction on a different date. These values were compared with the frequency of postoperativ...
Regression Analysis for Predictors of Entry into SAO. This file presents, in a table, the models ... more Regression Analysis for Predictors of Entry into SAO. This file presents, in a table, the models produced in the forward selection process, the coefficients and significance levels associated with each of them, reasons for keeping or removing all the variables and also the odds ratio for the final model for the paper. (DOCX 34 kb)
Questionnaire. This file presents the English translation of the original questionnaire used to g... more Questionnaire. This file presents the English translation of the original questionnaire used to gather the data used in this paper. The questionnaire is similar to the Portuguese version including in its layout. (DOCX 67 kb)
Plastic and Reconstructive Surgery Global Open, 2016
CONCLUSION: To our knowledge, this is the first systematic review devoted to breed responsible fo... more CONCLUSION: To our knowledge, this is the first systematic review devoted to breed responsible for severe dog bites in the peer-reviewed literature, as well as the first report evaluating breed specific legislation in the United States. Our data suggest that breed specific legislation may be effective in reducing the incidence of dog bites attributed to breeds that are regulated. Significant effort has been devoted to determining how best to minimize dog bites severe enough to require medical attention, and now, with this new information, Plastic Surgeons may be poised to lead the campaign on dog bite prevention.
Plastic and Reconstructive Surgery Global Open, 2016
RESULTS: The first case, diabetic patient with complicated transmetatarsal amputation of gangreno... more RESULTS: The first case, diabetic patient with complicated transmetatarsal amputation of gangrenous left forefoot with flaps closure. A total of 3 applications over the period of two months were needed to heal his wounds. The second case involved a patient with non-healing right leg ulcer. The pathology revealed Marjolin’s ulcer (squamous cell carcinoma). After clearing the margins, two applications of sub-mucosa porcine matrix were needed over the period of 6 weeks to heal the wound. The third case involved an anticoagulated patient with right hand traumatic hematoma. Surgical debridement was done leaving her with exposed extensor tendons. One application of sub-mucosa porcine matrix was required to achieve complete healing in 4 weeks. The 4th case involved a patient with stage IV sacral coccygeal pressure wound. Three months later and after 11 applications of sub-mucosa porcine matrix, his wound healed. The last case, the patient was referred with a two-year history of chronic ven...
The Lancet, 2020
The Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2019 provides a rules-based... more The Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2019 provides a rules-based synthesis of the available evidence on levels and trends in health outcomes, a diverse set of risk factors, and health system responses. GBD 2019 covered 204 countries and territories, as well as first administrative level disaggregations for 22 countries, from 1990 to 2019. Because GBD is highly standardised and comprehensive, spanning both fatal and non-fatal outcomes, and uses a mutually exclusive and collectively exhaustive list of hierarchical disease and injury causes, the study provides a powerful basis for detailed and broad insights on global health trends and emerging challenges. GBD 2019 incorporates data from 281 586 sources and provides more than 3•5 billion estimates of health outcome and health system measures of interest for global, national, and subnational policy dialogue. All GBD estimates are publicly available and adhere to the Guidelines on Accurate and Transparent Health Estimate Reporting. From this vast amount of information, five key insights that are important for health, social, and economic development strategies have been distilled. These insights are subject to the many limitations outlined in each of the component GBD capstone papers.
Plastic & Reconstructive Surgery, 2020
LEARNING OBJECTIVES After studying this article, the participant should be able to: 1. Understand... more LEARNING OBJECTIVES After studying this article, the participant should be able to: 1. Understand the relevant anatomy involved in breast reduction. 2. Understand the different breast reduction techniques and their indications. 3. Appreciate the outcomes of these techniques as they pertain to clinical outcomes. SUMMARY This continuing medical education article is designed to refresh one's knowledge on breast reduction while placing emphasis on clinical outcomes. It reviews the relevant anatomy, techniques, and published literature on outcomes, including those that are patient-reported. Photographic representations of most techniques are shown, in addition to supplemental digital video content, to demonstrate each technique. This is designed to be an overview, and the reader should appreciate that no one technique is "right," and the technique used should be selected with patient factors and desired outcomes in mind.
BMC Medical Education, 2019
Background: Lack of providers in surgery, anesthesia, and obstetrics (SAO) is a primary driver of... more Background: Lack of providers in surgery, anesthesia, and obstetrics (SAO) is a primary driver of limited surgical capacity worldwide. We aimed to identify predictors of entry into Surgery, Anesthesia, and Obstetrics and Gynecology (SAO) fields and preference of working in the public sector in Brazil which may help in profiling medical students for recruitment into these needed areas. Methods: A questionnaire was applied to all Brazilian medical graduates registered with a Board of Medicine from 2014 to 2015. Twenty-three characteristics were analyzed. Logistic regression was used to determine predictors' influence on outcome. Results: There were 4601 (28.2%) responders to the survey, of which 40.5% (CI 34.7-46.5%) plan to enter SAO careers. Of the 23 characteristics analyzed, eight differed significantly between those who planned to work in SAO and those who did not. Of those eight characteristics, just three were significant predictors in the regression model: preference for working in the hospital setting, having spent more than 70% of their clinical years in practical activities, and valuing the substantial earning potential. These three factors explained only 6.3% of the variance in SAO preference. Within the graduates who preferred SAO careers, there were only two predictors for working in the public sector ("preparatory time before medical school" and valuing "prestige/status"). Conclusions: Factors affecting specialty and sector choice are multifaceted and difficult to predict. Future programs to fill provider gaps should identify methods other than medical student profiling to assure specialty and sector needs are met.
Journal of Craniofacial Surgery, 2019
The Lancet, 2018
Background Population estimates underpin demographic and epidemiological research and are used to... more Background Population estimates underpin demographic and epidemiological research and are used to track progress on numerous international indicators of health and development. To date, internationally available estimates of population and fertility, although useful, have not been produced with transparent and replicable methods and do not use standardised estimates of mortality. We present single-calendar year and single-year of age estimates of fertility and population by sex with standardised and replicable methods. Methods We estimated population in 195 locations by single year of age and single calendar year from 1950 to 2017 with standardised and replicable methods. We based the estimates on the demographic balancing equation, with inputs of fertility, mortality, population, and migration data. Fertility data came from 7817 location-years of vital registration data, 429 surveys reporting complete birth histories, and 977 surveys and censuses reporting summary birth histories. We estimated age-specific fertility rates (ASFRs; the annual number of livebirths to women of a specified age group per 1000 women in that age group) by use of spatiotemporal Gaussian process regression and used the ASFRs to estimate total fertility rates (TFRs; the average number of children a woman would bear if she survived through the end of the reproductive age span [age 10-54 years] and experienced at each age a particular set of ASFRs observed in the year of interest). Because of sparse data, fertility at ages 10-14 years and 50-54 years was estimated from data on fertility in women aged 15-19 years and 45-49 years, through use of linear regression. Age-specific mortality data came from the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2017 estimates. Data on population came from 1257 censuses and 761 population registry location-years and were adjusted for underenumeration and age misreporting with standard demographic methods. Migration was estimated with the GBD Bayesian demographic balancing model, after incorporating information about refugee migration into the model prior. Final population estimates used the cohort-component method of population projection, with inputs of fertility, mortality, and migration data. Population uncertainty was estimated by use of out-of-sample predictive validity testing. With these data, we estimated the trends in population by age and sex and in fertility by age between 1950 and 2017 in 195 countries and territories. Findings From 1950 to 2017, TFRs decreased by 49•4% (95% uncertainty interval [UI] 46•4-52•0). The TFR decreased from 4•7 livebirths (4•5-4•9) to 2•4 livebirths (2•2-2•5), and the ASFR of mothers aged 10-19 years decreased from 37 livebirths (34-40) to 22 livebirths (19-24) per 1000 women. Despite reductions in the TFR, the global population has been increasing by an average of 83•8 million people per year since 1985. The global population increased by 197•2% (193•3-200•8) since 1950, from 2•6 billion (2•5-2•6) to 7•6 billion (7•4-7•9) people in 2017; much of this increase was in the proportion of the global population in south Asia and sub-Saharan Africa. The global annual rate of population growth increased between 1950 and 1964, when it peaked at 2•0%; this rate then remained nearly constant until 1970 and then decreased to 1•1% in 2017. Population growth rates in the southeast Asia, east Asia, and Oceania GBD super-region decreased from 2•5% in 1963 to 0•7% in 2017, whereas in sub-Saharan Africa, population growth rates were almost at the highest reported levels ever in 2017, when they were at 2•7%. The global average age increased from 26•6 years in 1950 to 32•1 years in 2017, and the proportion of the population that is of working age (age 15-64 years) increased from 59•9% to 65•3%. At the national level, the TFR decreased in all countries and territories between 1950 and 2017; in 2017, TFRs ranged from a low of 1•0 livebirths (95% UI 0•9-1•2) in Cyprus to a high of 7•1 livebirths (6•8-7•4) in Niger. The TFR under age 25 years (TFU25; number of livebirths expected by age 25 years for a hypothetical woman who survived the age group and was exposed to current ASFRs) in 2017 ranged from 0•08 livebirths (0•07-0•09) in South Korea to 2•4 livebirths (2•2-2•6) in Niger, and the TFR over age 30 years (TFO30; number of livebirths expected for a hypothetical woman ageing from 30 to 54 years who survived the age group and was exposed to current ASFRs) ranged from a low of 0•3 livebirths (0•3-0•4) in Puerto Rico to a high of 3•1 livebirths (3•0-3•2) in Niger. TFO30 was higher than TFU25 in 145 countries and territories in 2017. 33 countries had a negative population growth rate from 2010 to 2017, most of which were located in central, eastern, and western Europe, whereas population growth rates of more than 2•0% were seen in 33 of 46 countries in sub-Saharan Africa. In 2017, less than 65% of the national population was of working age in 12 of 34 high-income countries, and less than 50% of the national population was of working age in Mali, Chad, and Niger.
Revista do Colégio Brasileiro de Cirurgiões, 2017
Objective: to analyze demographic Brazilian medical data from the national public healthcare syst... more Objective: to analyze demographic Brazilian medical data from the national public healthcare system (SUS), which provides free universal health coverage for the entire population, and discuss the problems revealed, with particular focus on surgical care. Methods: data was obtained from public healthcare databases including the Medical Demography, the Brazilian Federal Council of Medicine, the Brazilian Institute of Geography and Statistics, and the National Database of Healthcare Establishments. Density and distribution of the medical workforce and healthcare facilities were calculated, and the geographic regions were analyzed using the public private inequality index. Results: Brazil has an average of two physicians for every 1,000 inhabitants, who are unequally distributed throughout the country. There are 22,276 board certified general surgeons in Brazil (11.49 for every 100,000 people). The country currently has 257 medical schools, with 25,159 vacancies for medical students eac...
The Lancet. Neurology, Nov 15, 2017
Comparable data on the global and country-specific burden of neurological disorders and their tre... more Comparable data on the global and country-specific burden of neurological disorders and their trends are crucial for health-care planning and resource allocation. The Global Burden of Diseases, Injuries, and Risk Factors (GBD) Study provides such information but does not routinely aggregate results that are of interest to clinicians specialising in neurological conditions. In this systematic analysis, we quantified the global disease burden due to neurological disorders in 2015 and its relationship with country development level. We estimated global and country-specific prevalence, mortality, disability-adjusted life-years (DALYs), years of life lost (YLLs), and years lived with disability (YLDs) for various neurological disorders that in the GBD classification have been previously spread across multiple disease groupings. The more inclusive grouping of neurological disorders included stroke, meningitis, encephalitis, tetanus, Alzheimer's disease and other dementias, Parkinson&#...
Annals of Plastic Surgery, 2017
Background: Accessory auricular tissue is a common congenital anomaly ranging from an accessory s... more Background: Accessory auricular tissue is a common congenital anomaly ranging from an accessory skin appendage to a separate pinna. The association between auditory or vestibular dysfunction and accessory auricular tissue is debated, and little is known about related solid organ abnormalities. We examine the prevalence of accessory auricular tissue, its association between solid organ abnormalities and auditory/vestibular dysfunction, and its management. Methods: A retrospective cohort study was performed using the 2000 to 2012 HCUP kids' inpatient database. Live newborns with a diagnosis of accessory auricle were included. Results: Of the 19,638,453 births recorded between 2000 and 2012, 0.13% had accessory auricular tissue (n = 25,802); 11.8% underwent excision or destruction of the tissue during birth admission. Newborns with this diagnosis were more likely to receive auditory and vestibular testing (5% vs 4.2%, P < 0.001; 5.5% vs 5%, P < 0.001) and to be diagnosed with abnormal auditory function (1.2% vs 0.5%, P < 0.001) and hearing loss (0.09% vs 0.02%, P < 0.001). Diagnosis of auditory impairment had a 3-fold higher odds of surgical management during birth stay (odds ratio, 3.12; 95% confidence interval, 1.826-5.339). Although none were diagnosed with vestibular dysfunction, patients with accessory auricular tissue were 1.5-fold to 3-fold more likely to have cardiac malformations and 4-fold more likely to have renal anomalies. Conclusions: Newborns with accessory auricular tissue more frequently undergo auditory and vestibular testing during birth stay. Auditory dysfunction, cardiac malformations, and renal anomalies are more frequently diagnosed in patients with accessory auricular tissue. However, none were diagnosed with vestibular impairment, bringing into question the necessity of vestibular testing.
Annals of Plastic Surgery, 2017
Assemb ！ ing the data of Crash − S七〇 p AsteTn by courtesy of the Ins七 i七ute for Sea Training ， th... more Assemb ！ ing the data of Crash − S七〇 p AsteTn by courtesy of the Ins七 i七ute for Sea Training ， the authQrs recomputed the tracks for each trial ． ． The training ships have perfor 皿 ed 士 he trials at leas七 〇 nce a year in 七heir curric111ums using various methQds ， harnely ； (1) The Du 皿 b −Card Method which calculates a ． ship 圃 s relative posjtions against a target afioat by obsefving 七 he relative azi 血 uths with fore and aft cards repeatedly ． (2) The Sextant Method which calcula 七 es her re ］ ative positions agains 七 adrifting life beat， from which one of the ship ' s fixed points is measured 1〕 y observing
International Health, 2016
Aesthetic Plastic Surgery, 2016
Introduction Ensuring patient safety along with a complete surgical experience for residents is o... more Introduction Ensuring patient safety along with a complete surgical experience for residents is of utmost importance in plastic surgical training. The effect of resident participation on the outcomes of outpatient plastic surgery procedures remains largely unknown. We assess the impact of resident participation on surgical outcomes using a prospective, validated, national database. Methods We identified all outpatient procedures performed by plastic surgeons between 2007 and 2012 in the American College of Surgeons National Surgical Quality Improvement Program database. Multivariate regression models assessed the impact of resident participation when compared to attendings alone on 30-day wound complications, overall complications, and return to the operating room (OR). Results A total of 18,641 patients were identified: 12,414 patients with an attending alone and 6227 with residents participating. The incidence of overall complications, wound complications, and return to OR was increased with resident participation. When confounding variables were controlled for in multivariate analysis, resident participation was no longer associated with increased risk of wound complications. When stratified by year, incidence of overall complications, wound complications, and return to OR in the resident participation group are trending down and fail to be significantly different in 2011 and 2012. Multivariate analysis shows a similar trend. Conclusions Resident participation is no longer independently associated with increased complications in outpatient plastic surgery in recent years, suggesting that plastic surgical training is successfully continuing to improve in both outcomes and safety. Additional prospective studies that characterize patient outcomes with resident seniority and the degree of resident participation are warranted.
Eplasty, 2015
The objective of this study was to evaluate the frequency of various postoperative complications ... more The objective of this study was to evaluate the frequency of various postoperative complications in patients undergoing either immediate or delayed breast reconstruction after mastectomy for malignancy. The ACS-NSQIP 2005-2012 database was queried for patients who underwent mastectomy for the treatment of breast malignancy. These mastectomy cases were then stratified, generating "mastectomy alone" and "mastectomy with immediate reconstruction" cohorts. Database analysis also identified "delayed-reconstruction" oncologic patients. All patients undergoing reconstruction were then stratified into the tissue expander/implant or flap-based reconstruction group. The frequency of postoperative complications was assessed. A multiplicative risk model was used to calculate the probability of postoperative complications after undergoing a mastectomy alone, followed by reconstruction on a different date. These values were compared with the frequency of postoperativ...
Lancet (London, England), Jan 7, 2015
Up-to-date evidence about levels and trends in disease and injury incidence, prevalence, and year... more Up-to-date evidence about levels and trends in disease and injury incidence, prevalence, and years lived with disability (YLDs) is an essential input into global, regional, and national health policies. In the Global Burden of Disease Study 2013 (GBD 2013), we estimated these quantities for acute and chronic diseases and injuries for 188 countries between 1990 and 2013. Estimates were calculated for disease and injury incidence, prevalence, and YLDs using GBD 2010 methods with some important refinements. Results for incidence of acute disorders and prevalence of chronic disorders are new additions to the analysis. Key improvements include expansion to the cause and sequelae list, updated systematic reviews, use of detailed injury codes, improvements to the Bayesian meta-regression method (DisMod-MR), and use of severity splits for various causes. An index of data representativeness, showing data availability, was calculated for each cause and impairment during three periods globally...
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Papers by Benjamin Massenburg