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1.
J Vasc Interv Radiol ; 33(10): 1222-1229.e1, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-35777619

RESUMO

PURPOSE: To evaluate differences in waitlist mortality and dropout in liver transplant candidates with hepatocellular carcinoma (HCC) who undergo radiofrequency (RF) ablation versus transarterial chemoembolization (TACE). MATERIAL AND METHODS: From 2004 to 2013, 11,824 patients with HCC in the Scientific Registry of Transplant Recipients who underwent RF ablation or TACE were included and followed until December 31, 2019, or 5 years, whichever came first, and were stratified by the Milan criteria. Competing risk and Cox regression analyses to compare waitlist mortality and dropout were performed using adjusted hazard ratios (asHRs, with RF ablation group as reference). Regression models were adjusted for age, race, sex, calculated Model for End-Stage Liver Disease score, tumor size, and number. RESULTS: There was no difference in waitlist mortality and dropout for patients outside the Milan criteria (n = 1,226) who underwent TACE (19.2%) or RF ablation (19.0%) (asHR, 0.91; 95% CI, 0.79-1.03). There was also no difference for patients inside the Milan criteria (n = 10,598) in waitlist mortality/dropout (TACE 13.4% vs RF ablation 12.9%) (asHR, 1.29; 95% CI, 0.79-2.09). A subgroup analysis within the Milan criteria demonstrated no difference between TACE and RF ablation treatments in patients with a single tumor of ≤3 cm (asHR, 0.92; 95% CI, 0.77-1.10), with a single tumor of >3 cm (asHR, 1.03; 95% CI, 0.79-1.34), or with >1 tumor (asHR, 0.89; 95% CI, 0.72-1.09). CONCLUSIONS: Using the national registry data, no difference was found in waitlist mortality and dropout for transplant candidates with HCC who received TACE versus RF ablation.


Assuntos
Carcinoma Hepatocelular , Ablação por Cateter , Quimioembolização Terapêutica , Doença Hepática Terminal , Neoplasias Hepáticas , Transplante de Fígado , Ablação por Radiofrequência , Carcinoma Hepatocelular/patologia , Ablação por Cateter/efeitos adversos , Quimioembolização Terapêutica/efeitos adversos , Doença Hepática Terminal/etiologia , Humanos , Neoplasias Hepáticas/diagnóstico por imagem , Neoplasias Hepáticas/terapia , Transplante de Fígado/efeitos adversos , Ablação por Radiofrequência/efeitos adversos , Sistema de Registros , Estudos Retrospectivos , Índice de Gravidade de Doença , Transplantados , Resultado do Tratamento
2.
Am J Transplant ; 21(3): 1179-1185, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-32808468

RESUMO

Recently, the Organ Procurement and Transplant Network approved a plan to allocate kidneys within 250-nm circles around donor hospitals. These homogeneous circles might not substantially reduce geographic differences in transplant rates because deceased donor kidney supply and demand differ across the country. Using Scientific Registry of Transplant Recipients data from 2016-2019, we used an integer program to design unique, heterogeneous circles with sizes between 100 and 500 nm that reduced supply/demand ratio variation across transplant centers. We weighted demand according to wait time because candidates who have waited longer have higher priority. We compared supply/demand ratios and average travel distance of kidneys, using heterogeneous circles and 250 and 500-nm fixed-distance homogeneous circles. We found that 40% of circles could be 250 nm or smaller, while reducing supply/demand ratio variation more than homogeneous circles. Supply/demand ratios across centers for heterogeneous circles ranged from 0.06 to 0.13 kidneys per wait-year, compared to 0.04 to 0.47 and 0.05 to 0.15 kidneys per wait-year for 250-nm and 500-nm homogeneous circles, respectively. The average travel distance for kidneys using heterogeneous, and 250-nm and 500-nm fixed-distance circles was 173 nm, 134 nm, and 269 nm, respectively. Heterogeneous circles reduce geographic disparity compared to homogeneous circles, while maintaining reasonable travel distances.


Assuntos
Transplante de Rim , Obtenção de Tecidos e Órgãos , Seleção do Doador , Humanos , Rim , Doadores de Tecidos
3.
Am J Transplant ; 21(10): 3305-3311, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-33870635

RESUMO

Recently, model for end-stage liver disease (MELD)-based liver allocation in the United States has been questioned based on concerns that waitlist mortality for a given biologic MELD (bMELD), calculated using laboratory values alone, might be higher at certain centers in certain locations across the country. Therefore, we aimed to quantify the center-level variation in bMELD-predicted mortality risk. Using Scientific Registry of Transplant Recipients (SRTR) data from January 2015 to December 2019, we modeled mortality risk in 33 260 adult, first-time waitlisted candidates from 120 centers using multilevel Poisson regression, adjusting for sex, and time-varying age and bMELD. We calculated a "MELD correction factor" using each center's random intercept and bMELD coefficient. A MELD correction factor of +1 means that center's candidates have a higher-than-average bMELD-predicted mortality risk equivalent to 1 bMELD point. We found that the "MELD correction factor" median (IQR) was 0.03 (-0.47, 0.52), indicating almost no center-level variation. The number of centers with "MELD correction factors" within ±0.5 points, and between ±0.5-± 1, ±1.0-±1.5, and ±1.5-±2.0 points was 62, 41, 13, and 4, respectively. No centers had waitlisted candidates with a higher-than-average bMELD-predicted mortality risk beyond ±2 bMELD points. Given that bMELD similarly predicts waitlist mortality at centers across the country, our results support continued MELD-based prioritization of waitlisted candidates irrespective of center.


Assuntos
Doença Hepática Terminal , Transplante de Fígado , Obtenção de Tecidos e Órgãos , Doença Hepática Terminal/cirurgia , Humanos , Índice de Gravidade de Doença , Listas de Espera
4.
Am J Transplant ; 21(3): 1138-1146, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-32659036

RESUMO

Kidneys from older (age ≥50 years) donation after cardiac death (DCD50) donors are less likely to be transplanted due to inferior posttransplant outcomes. However, candidates who decline a DCD50 offer must wait for an uncertain future offer. To characterize the survival benefit of accepting DCD50 kidneys, we used 2010-2018 Scientific Registry for Transplant Recipients (SRTR) data to identify 92 081 adult kidney transplantation candidates who were offered a DCD50 kidney that was eventually accepted for transplantation. DCD50 kidneys offered to candidates increased from 590 in 2010 to 1441 in 2018. However, 34.6% of DCD50 kidneys were discarded. Candidates who accepted DCD50 offers had 49% decreased mortality risk (adjusted hazard ratio [aHR] 0.46 0.510.55 , cumulative mortality at 6-year 23.3% vs 34.0%, P < .001) compared with those who declined the same offer (decliners). Six years after their initial DCD50 offer decline, 43.0% of decliners received a deceased donor kidney transplant (DDKT), 6.3% received living donor kidney transplant (LDKT), 22.6% died, 22.0% were removed for other reasons, and 6.0% were still on the waitlist. Comparable survival benefit was observed even with DCD donors age ≥60 (aHR: 0.42 0.520.65 , P < .001). Accepting DCD50 kidneys was associated with a substantial survival benefit; providers and patients should consider these benefits when evaluating offers.


Assuntos
Obtenção de Tecidos e Órgãos , Adulto , Morte , Seleção do Doador , Sobrevivência de Enxerto , Humanos , Rim , Pessoa de Meia-Idade , Sistema de Registros , Doadores de Tecidos
5.
Am J Transplant ; 19(7): 2044-2052, 2019 07.
Artigo em Inglês | MEDLINE | ID: mdl-30748095

RESUMO

Recent OPTN proposals to address geographic disparity in liver allocation have involved circular boundaries: the policy selected 12/17 allocated to 150-mile circles in addition to DSAs/regions, and the policy selected 12/18 allocated to 150-mile circles eliminating DSA/region boundaries. However, methods to reduce geographic disparity remain controversial, within the OPTN and the transplant community. To inform ongoing discussions, we studied center-level supply/demand ratios using SRTR data (07/2013-06/2017) for 27 334 transplanted deceased donor livers and 44 652 incident waitlist candidates. Supply was the number of donors from an allocation unit (DSA or circle), allocated proportionally (by waitlist size) to the centers drawing on these donors. We measured geographic disparity as variance in log-transformed supply/demand ratio, comparing allocation based on DSAs, fixed-distance circles (150- or 400-mile radius), and fixed-population (12- or 50-million) circles. The recently proposed 150-mile radius circles (variance = 0.11, P = .9) or 12-million-population circles (variance = 0.08, P = .1) did not reduce the geographic disparity compared to DSA-based allocation (variance = 0.11). However, geographic disparity decreased substantially to 0.02 in both larger fixed-distance (400-mile, P < .001) and larger fixed-population (50-million, P < .001) circles (P = .9 comparing fixed distance and fixed population). For allocation circles to reduce geographic disparities, they must be larger than a 150-mile radius; additionally, fixed-population circles are not superior to fixed-distance circles.


Assuntos
Doença Hepática Terminal/cirurgia , Necessidades e Demandas de Serviços de Saúde/organização & administração , Disparidades em Assistência à Saúde , Transplante de Fígado/estatística & dados numéricos , Regionalização da Saúde/tendências , Doadores de Tecidos/provisão & distribuição , Obtenção de Tecidos e Órgãos/organização & administração , Adulto , Cadáver , Feminino , Geografia , Acessibilidade aos Serviços de Saúde , Humanos , Masculino , Pessoa de Meia-Idade , Listas de Espera
6.
Am J Transplant ; 19(2): 564-572, 2019 02.
Artigo em Inglês | MEDLINE | ID: mdl-30312530

RESUMO

Historically, exception points for hepatocellular carcinoma (HCC) led to higher transplant rates and lower waitlist mortality for HCC candidates compared to non-HCC candidates. As of October 2015, HCC candidates must wait 6 months after initial application to obtain exception points; the impact of this policy remains unstudied. Using 2013-2017 SRTR data, we identified 39  350 adult, first-time, active waitlist candidates and compared deceased donor liver transplant (DDLT) rates and waitlist mortality/dropout for HCC versus non-HCC candidates before (October 8, 2013-October 7, 2015, prepolicy) and after (October 8, 2015-October 7, 2017, postpolicy) the policy change using Cox and competing risks regression, respectively. Compared to non-HCC candidates with the same calculated MELD, HCC candidates had a 3.6-fold higher rate of DDLT prepolicy (aHR = 3.49 3.69 3.89 ) and a 2.2-fold higher rate of DDLT postpolicy (aHR = 2.09 2.21 2.34 ). Compared to non-HCC candidates with the same allocation priority, HCC candidates had a 37% lower risk of waitlist mortality/dropout prepolicy (asHR = 0.54 0.63 0.73 ) and a comparable risk of mortality/dropout postpolicy (asHR = 0.81 0.95 1.11 ). Following the policy change, the DDLT advantage for HCC candidates remained, albeit dramatically attenuated, without any substantial increase in waitlist mortality/dropout. In the context of sickest-first liver allocation, the revised policy seems to have established allocation equity for HCC and non-HCC candidates.


Assuntos
Carcinoma Hepatocelular/mortalidade , Neoplasias Hepáticas/mortalidade , Transplante de Fígado/mortalidade , Seleção de Pacientes , Alocação de Recursos/legislação & jurisprudência , Obtenção de Tecidos e Órgãos/estatística & dados numéricos , Listas de Espera/mortalidade , Idoso , Carcinoma Hepatocelular/patologia , Carcinoma Hepatocelular/cirurgia , Feminino , Seguimentos , Humanos , Neoplasias Hepáticas/patologia , Neoplasias Hepáticas/cirurgia , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Prospectivos , Medição de Risco , Índice de Gravidade de Doença , Doadores de Tecidos
7.
Pediatr Transplant ; 23(7): e13542, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31313464

RESUMO

Information about wait-list time has been reported as one of the single most frequently asked questions by individuals awaiting a transplant but data regarding wait-list time have not been processed in a useful way for pediatric candidates. To predict chance of receiving a DDLT, we identified 6471 pediatric (<18 years), non status-1A, liver-only transplant candidates between 2006 and 2017 from the SRTR. Cox regression with shared frailty for DSA level effect was used to model the association of blood type, weight, allocation PELD and MELD, and DSA with chance of DDLT. Jackknife technique was used for validation. Median (interquartile range) wait-list time was 100 (34-309) days. Non-O Blood type, higher PELD/MELD score at listing, and DSA were associated with increased chance of DDLT, while age 1-5 years and 10-18 years was associated with lower chance of DDLT (P < 0.001 for all variables). Our model accurately predicted chance of transplant (C-statistic = 0.68) and was able to predict DDLT at specific follow-up times (eg, 3 months). This model can serve as the basis for an online tool that would provide useful information for pediatric wait-list candidates.


Assuntos
Doença Hepática Terminal/cirurgia , Falência Hepática/cirurgia , Transplante de Fígado , Obtenção de Tecidos e Órgãos/métodos , Listas de Espera , Adolescente , Algoritmos , Criança , Pré-Escolar , Humanos , Lactente , Modelos de Riscos Proporcionais , Sistema de Registros , Medição de Risco , Índice de Gravidade de Doença
8.
Pediatr Transplant ; 23(6): e13513, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31215155

RESUMO

Children receiving a LDLT have superior post-transplant outcomes, but this procedure is only used for 10% of transplant recipients. Better understanding about barriers toward LDLT and the sociodemographic characteristics that influence these underlying mechanisms would help to inform strategies to increase its use. We conducted an online, anonymous survey of parents/caregivers for children awaiting, or have received, a liver transplant regarding their knowledge and attitudes about LDLT. The survey was completed by 217 respondents. While 97% of respondents understood an individual could donate a portion of their liver, only 72% knew the steps in evaluation, and 69% understood the donor surgery was covered by the recipient's insurance. Individuals with public insurance were less likely than those with private insurance to know the steps for LDLT evaluation (44% vs 82%; P < 0.001). Respondents with public insurance were less likely to know someone that had been a living donor (44% vs 56%; P = 0.005) as were individuals without a college degree (64% vs 85%; P = 0.007). Nearly all respondents generally trusted their healthcare team. Among respondents, 82% believed they were well-informed about LDLT but individuals with public insurance were significantly less likely to feel well-informed (67% vs 87%; P = 0.03) and to understand how donor surgery might impact donor work/time off (44% vs 81%; P = 0.001). Substantial gaps exist in parental understanding about LDLT, including its evaluation, potential benefits, and complications. Greater emphasis on addressing these barriers, especially to individuals with fewer resources, will be helpful to expand the use of LDLT.


Assuntos
Acessibilidade aos Serviços de Saúde , Transplante de Fígado , Doadores Vivos , Obtenção de Tecidos e Órgãos/métodos , Adolescente , Criança , Pré-Escolar , Feminino , Humanos , Internet , Fígado/cirurgia , Masculino , Classe Social , Rede Social , Inquéritos e Questionários , Resultado do Tratamento
9.
Am J Transplant ; 18(11): 2804-2810, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-30086198

RESUMO

Development of end-stage renal disease (ESRD) in living kidney donors is associated with increased graft loss in the recipients of their kidneys. Our goal was to investigate if this relationship was reflected at an earlier stage postdonation, possibly early enough for recipient risk prediction based on donor response to nephrectomy. Using national registry data, we studied 29 464 recipients and their donors from 2008-2016 to determine the association between donor 6-month postnephrectomy estimated GFR (eGFR) and recipient death-censored graft failure (DCGF). We explored donor BMI as an effect modifier, given the association between obesity and hyperfiltration. On average, risk of DCGF increased with each 10 mL/min decrement in postdonation eGFR (adjusted hazard ratio [aHR] 1.06, 95% confidence interval [CI] 1.02-1.10, P = .007). The association was attenuated with higher donor BMI (interaction P = .049): recipients from donors with BMI = 20 (aHR 1.12, 95% CI 1.04-1.19, P = .002) and BMI = 25 (aHR 1.07, 95% CI 1.03-1.12, P = .001) had a higher risk of DCGF with each 10 mL/min decrement in postdonation eGFR, whereas recipients from donors with BMI = 30 and BMI = 35 did not have a higher risk. The relationship between postdonation eGFR, donor BMI, and recipient graft loss can inform counseling and management of living donor kidney transplant recipients.


Assuntos
Taxa de Filtração Glomerular , Rejeição de Enxerto/etiologia , Falência Renal Crônica/cirurgia , Transplante de Rim/efeitos adversos , Doadores Vivos/provisão & distribuição , Nefrectomia/efeitos adversos , Coleta de Tecidos e Órgãos/efeitos adversos , Adulto , Feminino , Seguimentos , Sobrevivência de Enxerto , Humanos , Testes de Função Renal , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias , Prognóstico , Sistema de Registros , Fatores de Risco , Transplantados/estatística & dados numéricos
10.
J Peripher Nerv Syst ; 22(2): 121-126, 2017 06.
Artigo em Inglês | MEDLINE | ID: mdl-28447405

RESUMO

Although Guillain-Barré syndrome (GBS) has higher incidence and poor outcome in Bangladesh, mortality from GBS in Bangladesh has never been explored before. We sought to explore the frequency, timing, and risk factors for deaths from GBS in Bangladesh. We conducted a prospective study on 407 GBS patients who were admitted to Dhaka Medical College Hospital, Dhaka, Bangladesh from 2010 to 2013. We compared deceased and alive patients to identify risk factors. Cox regression model was used to adjust for confounders. Of the 407 GBS patients, 50 (12%) died, with the median time interval between the onset of weakness and death of 18 days. Among the fatal cases, 24 (48%) were ≥40 years, 36 (72%) had a Medical Research Council sum score ≤20 at entry, 33 (66%) had a progressive phase <8 days, and 27 (54%) required ventilation support. Ten patients (20%) died due to unavailability of ventilator. The strongest risk factor for deaths was lack of ventilator support when it was required (HR: 11.9; 95% confidence interval [CI]: 4.6-30.7). Other risk factors for death included age ≥40 years (HR: 5.9; 95% CI: 2.1-16.7), mechanical ventilation (HR: 2.3; 95% CI: 1.02-5.2), longer progressive phase (>8 days) (HR: 2.06; 95% CI: 1.1-3.8), autonomic dysfunction (HR: 1.9; 95% CI: 1.05-3.6), and bulbar nerve involvement (HR: 5.4; 95% CI: 1.5-19.2). In Bangladesh, GBS is associated with higher mortality rates, which is related to lack of ventilator support, disease severity, longer progressive phase of the disease, autonomic dysfunction, and involvement of the bulbar nerves.


Assuntos
Síndrome de Guillain-Barré/epidemiologia , Síndrome de Guillain-Barré/mortalidade , Adolescente , Adulto , Distribuição por Idade , Bangladesh/epidemiologia , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Modelos de Riscos Proporcionais , Estudos Retrospectivos , Fatores de Risco , Adulto Jovem
11.
Transplantation ; 2024 Mar 29.
Artigo em Inglês | MEDLINE | ID: mdl-38548691

RESUMO

BACKGROUND: Since February 2020, exception points have been allocated equivalent to the median model for end-stage liver disease at transplant within 250 nautical miles of the transplant center (MMaT/250). We compared transplant rate and waitlist mortality for hepatocellular carcinoma (HCC) exception, non-HCC exception, and non-exception candidates to determine whether MMaT/250 advantages (or disadvantages) exception candidates. METHODS: Using Scientific Registry of Transplant Recipients data, we identified 23 686 adult, first-time, active, deceased donor liver transplant (DDLT) candidates between February 4, 2020, and February 3, 2022. We compared DDLT rates using Cox regression, and waitlist mortality/dropout using competing risks regression in non-exception versus HCC versus non-HCC candidates. RESULTS: Within 24 mo of study entry, 58.4% of non-exception candidates received DDLT, compared with 57.8% for HCC candidates and 70.5% for non-HCC candidates. After adjustment, HCC candidates had 27% lower DDLT rate (adjusted hazard ratio = 0.680.730.77) compared with non-exception candidates. However, waitlist mortality for HCC was comparable to non-exception candidates (adjusted subhazard ratio [asHR] = 0.931.031.15). Non-HCC candidates with pulmonary complications of cirrhosis or cholangiocarcinoma had substantially higher risk of waitlist mortality compared with non-exception candidates (asHR = 1.271.702.29 for pulmonary complications of cirrhosis, 1.352.043.07 for cholangiocarcinoma). The same was not true of non-HCC candidates with exceptions for other reasons (asHR = 0.540.881.44). CONCLUSIONS: Under MMaT/250, HCC, and non-exception candidates have comparable risks of dying before receiving liver transplant, despite lower transplant rates for HCC. However, non-HCC candidates with pulmonary complications of cirrhosis or cholangiocarcinoma have substantially higher risk of dying before receiving liver transplant; these candidates may merit increased allocation priority.

12.
Transplantation ; 107(12): e339-e347, 2023 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-37726882

RESUMO

BACKGROUND: In the context of the organ shortage, donation after circulatory death (DCD) provides an opportunity to expand the donor pool. Although deceased-donor liver transplantation from DCD donors has expanded, DCD livers continue to be discarded at elevated rates; the use of DCD livers from older donors, or donors with comorbidities, is controversial. METHODS: Using US registry data from 2009 to 2020, we identified 1564 candidates on whose behalf a DCD liver offer was accepted ("acceptors") and 16 981 candidates on whose behalf the same DCD offers were declined ("decliners"). We characterized outcomes of decliners using a competing risk framework and estimated the survival benefit (adjusted hazard ratio [95% confidence interval]) of accepting DCD livers using Cox regression. RESULTS: Within 10 y of DCD offer decline, 50.9% of candidates died or were removed from the waitlist before transplantation with any type of allograft. DCD acceptors had lower mortality compared with decliners at 10 y postoffer (35.4% versus 48.9%, P < 0.001). After adjustment for candidate covariates, DCD offer acceptance was associated with a 46% reduction in mortality (0.54 [0.49-0.61]). Acceptors of older (age ≥50), obese (body mass index ≥30), hypertensive, nonlocal, diabetic, and increased risk DCD livers had 44% (0.56 [0.42-0.73]), 40% (0.60 [0.49-0.74]), 48% (0.52 [0.41-0.66]), 46% (0.54 [0.45-0.65]), 32% (0.68 [0.43-1.05]), and 45% (0.55 [0.42-0.72]) lower mortality risk compared with DCD decliners, respectively. CONCLUSIONS: DCD offer acceptance is associated with considerable long-term survival benefits for liver transplant candidates, even with older DCD donors or donors with comorbidities. Increased recovery and utilization of DCD livers should be encouraged.


Assuntos
Transplante de Fígado , Obtenção de Tecidos e Órgãos , Humanos , Estados Unidos , Transplante de Fígado/efeitos adversos , Doadores Vivos , Doadores de Tecidos , Fígado , Transplante Homólogo , Sobrevivência de Enxerto , Morte , Estudos Retrospectivos
13.
Transplant Direct ; 7(4): e684, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-34549082

RESUMO

BACKGROUND: Despite the revolutionary role of direct-acting antivirals for hepatitis C virus (HCV), the treatment timing for liver transplant candidates remains controversial. We hypothesize that deferring treatment until after liver transplantation improves access to a larger and higher-quality donor pool without a detrimental impact on post-liver transplantation outcomes. METHODS: This single-center study includes recipients that underwent deceased-donor liver transplant with HCV as the primary indication January 1, 2014, to December 31, 2018. For recipients that were untreated (n = 87) versus treated (n = 42) pre-LT, we compared post-LT mortality using Cox regression with inverse probability of treatment-weighted data. RESULTS: Among pre-LT untreated recipients, 95% were willing to accept an HCV+ donor, and 44.8% received a positive HCV antibody and nucleic acid amplification test (NAT) liver. Among pre-LT treated recipients, 5% were willing to accept an HCV+ donor, and 100% received a negative HCV antibody and NAT liver. The median calculated model for end-stage liver disease at transplant was similar between pre-LT untreated (13, IQR = 9-22) and treated recipients (11, IQR = 8-14) (P = 0.1). Pre-LT treated recipients received livers from older (47 y old versus 37, P < 0.01) and higher body mass index donors (30.2 versus 26.6; P = 0.04) and spent longer on the waiting list (319 d 180, P < 0.001). Unadjusted post-LT mortality at 1 year was higher in the pre-LT treated recipients (14.6% versus 3.5%, P = 0.02). After adjusting for recipient factors, pre-LT treated recipients trended toward a 3.9 times higher risk of mortality compared with the pre-LT untreated recipients (adjusted hazard ratio = 0.973.8615.4) (P = 0.06). CONCLUSIONS: Deferring HCV treatment improves access to higher-quality donors and may improve post-LT survival.

14.
Transplantation ; 104(3): 583-590, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-32106202

RESUMO

BACKGROUND: Recipients of kidneys from living donors who subsequently develop end-stage renal disease (ESRD) also have higher graft failure, suggesting the 2 donor kidneys share risk factors that could inform recipient outcomes. Given that donor ESRD is rare, an earlier and more common postdonation outcome could serve as a surrogate to individualize counseling and management for recipients. Hypertension is a frequent event before donor ESRD; thus, early postdonation hypertension might indicate higher risk of graft failure. METHODS: We studied Scientific Registry of Transplant Recipients data to quantify the association between early postdonation hypertension and recipient graft failure using propensity score-weighted Cox proportional hazards regression. We also examined the association between postdonation systolic blood pressure and graft failure. RESULTS: Of 37 901 recipients, 2.4% had a donor who developed hypertension within 2 years postdonation. Controlling for donor and recipient characteristics, recipients whose donors developed hypertension had no higher risk for graft failure (adjusted hazard ratio [aHR] 1.03, 95% confidence interval [CI] 0.85-1.25, P = 0.72). This was consistent among subgroups of recipients at higher risk for adverse outcomes due to hyperfiltration: African American recipients (aHR 1.10, 95% CI 0.70-1.73, P = 0.68) and those with ESRD caused by hypertension (aHR 1.10, 95% CI 0.65-1.85, P = 0.73) or diabetes (aHR 0.80, 95% CI 0.56-1.13, P = 0.20). However, graft failure was associated with postdonation systolic blood pressure (per 10 mm Hg, aHR 1.05, 95% CI 1.03-1.08, P < 0.001). CONCLUSIONS: Although postdonation systolic blood pressure is associated with graft failure, the reported diagnosis of hypertension as determined by the requirement for blood pressure treatment early postdonation did not portend a higher risk of recipient graft failure in the same way as eventual postdonation ESRD.


Assuntos
Rejeição de Enxerto/epidemiologia , Hipertensão/epidemiologia , Transplante de Rim/efeitos adversos , Nefrectomia/efeitos adversos , Coleta de Tecidos e Órgãos/efeitos adversos , Adulto , Anti-Hipertensivos/uso terapêutico , Feminino , Seguimentos , Rejeição de Enxerto/etiologia , Sobrevivência de Enxerto , Humanos , Hipertensão/tratamento farmacológico , Hipertensão/etiologia , Incidência , Rim , Falência Renal Crônica/cirurgia , Doadores Vivos/estatística & dados numéricos , Masculino , Pessoa de Meia-Idade , Sistema de Registros/estatística & dados numéricos , Medição de Risco , Fatores de Risco , Transplantados/estatística & dados numéricos
15.
Ann Clin Transl Neurol ; 6(2): 324-332, 2019 02.
Artigo em Inglês | MEDLINE | ID: mdl-30847364

RESUMO

Objective: We investigated clinical, biological, and electrophysiological risk factors for mechanical ventilation (MV) and patient outcomes in Bangladesh using one of the largest, prospective Guillain-Barré syndrome (GBS) cohorts in developing world. Methods: A total of 693 GBS patients were included in two GBS studies conducted between 2006 and 2016 in Dhaka, Bangladesh. Associations between baseline characteristics and MV were tested using Fisher's exact test, χ2 test, or Mann-Whitney U-test, as appropriate. Risk factors for MV were assessed using multivariate logistic regression. Survival analysis was performed using Kaplan-Meier method; comparisons between groups performed using log-rank test. Results: Of 693 patients, 155 (23%) required MV (median age, 26 years; interquartile range [IQR] 17-40). Among the ventilated patients, males were predominant (68%) than females. The most significant risk factor for MV was bulbar involvement (adjusted odds ratio [AOR]:19.07; 95% CI = 89.00-192.57, P = 0.012). Other independently associated factors included dysautonomia (AOR:4.88; 95% CI = 1.49-15.98, P = 0.009) and severe muscle weakness at study entry (AOR:6.12; 95% CI = 0.64-58.57, P = 0.048). At 6 months after disease onset, 20% of ventilated and 52% of non-ventilated patients (P < 0.001) had recovered completely or with minor symptoms. Mortality rate was significantly higher among ventilated patients than non-ventilated patients (41% vs. 7%, P < 0.001). Interpretation: Bulbar involvement, dysautonomia and severe muscle weakness were identified as the most important risk factors for MV among GBS patients from Bangladesh. The findings may help to develop predictive models for MV in GBS in developing countries to identify impending respiratory failure and proper clinical management of GBS patients.


Assuntos
Síndrome de Guillain-Barré/complicações , Síndrome de Guillain-Barré/fisiopatologia , Insuficiência Respiratória/etiologia , Insuficiência Respiratória/fisiopatologia , Adolescente , Adulto , Bangladesh , Feminino , Humanos , Modelos Logísticos , Masculino , Razão de Chances , Estudos Prospectivos , Respiração Artificial/métodos , Fatores de Risco , Adulto Jovem
16.
Transplantation ; 103(4): 764-771, 2019 04.
Artigo em Inglês | MEDLINE | ID: mdl-30015701

RESUMO

BACKGROUND: Many kidneys are discarded every year, with 3631 kidneys discarded in 2016 alone. Identifying kidneys at high risk of discard could facilitate "rescue" allocation to centers more likely to transplant them. The Probability of Delay or Discard (PODD) model was developed to identify marginal kidneys at risk of discard or delayed allocation beyond 36 hours of cold ischemia time. However, PODD has not been prospectively validated, and patterns of discard may have changed after policy changes such as the introduction of Kidney Donor Profile Index and implementation of the Kidney Allocation System (KAS). METHODS: We prospectively validated the PODD model using Scientific Registry of Transplant Recipients data in the KAS era (January 1, 2015, to March 1, 2018). C statistic was calculated to assess accuracy in predicting kidney discard. We assessed clustering in centers' utilization of kidneys with PODD >0.6 ("high-PODD") using Gini coefficients. Using match run data from January 1, 2015, to December 31, 2016, we examined distribution of these high-PODD kidneys offered to centers that never accepted a high-PODD kidney. RESULTS: The PODD model predicted discard accurately under KAS (C-statistic, 0.87). Compared with utilization of low-PODD kidneys (Gini coefficient = 0.41), utilization of high-PODD kidneys was clustered more tightly among a few centers (Gini coefficient, 0.84 with >60% of centers never transplanted a high-PODD kidneys). In total, 11684 offers (35.0% of all high-PODD offers) were made to centers that never accepted a high-PODD kidney. CONCLUSIONS: Prioritizing allocation of high-PODD kidneys to centers that are more likely to transplant them might help reduce kidney discard.


Assuntos
Transplante de Rim , Obtenção de Tecidos e Órgãos , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Probabilidade , Estudos Prospectivos
17.
Transplantation ; 102(12): 2088-2095, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-29912046

RESUMO

BACKGROUND: The availability of direct-acting antiviral (DAA) therapy might have impacted use of hepatitis C virus (HCV)-infected (HCV+) deceased donor kidneys for transplantation. METHODS: We used 2005 to 2018 Scientific Registry of Transplant Recipients data to identify 18 936 candidates willing to accept HCV+ kidneys and 3348 HCV+ recipients of HCV+ kidneys. We compared willingness to accept, utilization, discard, and posttransplant outcomes associated with HCV+ kidneys between 2 treatment eras (interferon [IFN] era, January 1, 2005 to December 5, 2013 vs DAA era, December 6, 2013 to August 2, 2018). Models were adjusted for candidate, recipient, and donor factors where appropriate. RESULTS: In the DAA era, candidates were 2.2 times more likely to list as willing to accept HCV+ kidneys (adjusted odds ratio, 2.072.232.41; P < 0.001), and HCV+ recipients were 1.95 times more likely to have received an HCV+ kidney (adjusted odds ratio, 1.761.952.16; P < 0.001). Median Kidney Donor Profile Index of HCV+ kidneys decreased from 77 (interquartile range [IQR], 59-90) in 2005 to 53 (IQR, 40-67) in 2017. Kidney Donor Profile Index of HCV- kidneys remained unchanged from 45 (IQR, 21-74) to 47 (IQR, 24-73). After adjustment, HCV+ kidneys were 3.7 times more likely to be discarded than HCV- kidneys in the DAA era (adjusted relative rate, 3.363.674.02; P < 0.001); an increase from the IFN era (adjusted relative rate, 2.783.023.27; P < 0.001). HCV+ kidney use was concentrated within a subset of centers; 22.5% of centers performed 75% of all HCV+ kidney transplants in the DAA era. Mortality risk associated with HCV+ kidneys remained unchanged (aHR, 1.071.191.32 in both eras). CONCLUSIONS: Given the elevated risk of death on dialysis facing HCV+ candidates, improving quality of HCV+ kidneys, and DAA availability, broader utilization of HCV+ kidneys is warranted to improve access in this era of organ shortage.


Assuntos
Antivirais/uso terapêutico , Seleção do Doador , Anticorpos Anti-Hepatite C/sangue , Hepatite C/prevenção & controle , Transplante de Rim/métodos , Aceitação pelo Paciente de Cuidados de Saúde , Doadores de Tecidos/provisão & distribuição , Biomarcadores/sangue , Feminino , Hepatite C/sangue , Hepatite C/transmissão , Hepatite C/virologia , Humanos , Masculino , Pessoa de Meia-Idade , Sistema de Registros , Medição de Risco , Fatores de Risco , Fatores de Tempo , Resultado do Tratamento , Estados Unidos , Listas de Espera
18.
PLoS One ; 10(9): e0136898, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26340672

RESUMO

OBJECTIVES: A community based approach before, during and after child birth has been proven effective address the burden of maternal, neonatal and child morbidity and mortality in the low and middle income countries. We aimed to examine the overall change in maternal and newborn health outcomes due the "Improved Maternal Newborn and Child Survival" (IMNCS) project, which was implemented by BRAC in rural communities of Bangladesh. METHODS: The intervention was implemented in four districts for duration of 5-years, while two districts served as comparison areas. The intervention was delivered by community health workers who were trained on essential maternal, neonatal and child health care services. A baseline survey was conducted in 2008 among 7, 200 women with pregnancy outcome in last year or having a currently alive child of 12-59 months. A follow-up survey was administered in 2012-13 among 4, 800 women of similar characteristics in the same villages. FINDINGS: We observed significant improvements in maternal and essential newborn care in intervention areas over time, especially in health care seeking behaviors. The proportion of births taking place at home declined in the intervention districts from 84.3% at baseline to 71.2% at end line (P<0.001). Proportion of deliveries with skilled attendant was higher in intervention districts (28%) compared to comparison districts (27.4%). The number of deliveries was almost doubled at public sector facility comparing with baseline (P<0.001). Significant improvement was also observed in healthy cord care practice, delayed bathing of the new-born and reduction of infant mortality in intervention districts compared to that of comparison districts. CONCLUSIONS: This study demonstrates that community-based efforts offer encouraging evidence and value for combining maternal, neonatal and child health care package. This approach might be considered at larger scale in similar settings with limited resources.


Assuntos
Serviços de Saúde da Criança/estatística & dados numéricos , Pesquisa sobre Serviços de Saúde/estatística & dados numéricos , Serviços de Saúde Materna/estatística & dados numéricos , Avaliação de Programas e Projetos de Saúde/estatística & dados numéricos , Adulto , Bangladesh , Criança , Serviços de Saúde da Criança/provisão & distribuição , Agentes Comunitários de Saúde/organização & administração , Feminino , Parto Domiciliar/estatística & dados numéricos , Humanos , Lactente , Mortalidade Infantil/tendências , Recém-Nascido , Serviços de Saúde Materna/provisão & distribuição , Mortalidade Materna/tendências , Triagem Neonatal , Gravidez , População Rural
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