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Journal articles on the topic 'Nelson-Aalen estimator'

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Published: 4 June 2021

Last updated: 25 April 2022

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1

Ozguven, Eren Erman, and Kaan Ozbay. "Nonparametric Bayesian Estimation of Freeway Capacity Distribution from Censored Observations." Transportation Research Record: Journal of the Transportation Research Board 2061, no. 1 (2008): 20–29. http://dx.doi.org/10.3141/2061-03.

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Previous studies have been made of the usefulness and effectiveness of survival analysis in transportation and traffic engineering studies with incomplete data in which the Kaplan–Meier estimate is proposed for determining traffic capacity distribution. However, well-known estimators like Kaplan–Meier and Nelson–Aalen have several disadvantages that make it difficult to obtain the traffic capacity distribution. First, neither estimator is defined for all values of traffic flows possible. That is, the maximum flow followed by a breakdown defines the final point of the estimated distribution cur

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Obed, Sami A., Parzhin A. Mohammed, and Dler H. Kadir. "The Estimation of (Covid-19) Cases in Kurdistan Region Using Nelson Aalen Estimator." Cihan University-Erbil Scientific Journal 5, no. 2 (2021): 24–31. http://dx.doi.org/10.24086/cuesj.v5n2y2021.pp24-31.

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It is described how the Nelson–Aalen estimator may be used to control the rate of a nonparametric estimate of the cumulative hazard rate function based on right censored as well as left condensed survival data, furthermore how the Nelson–Aalen estimator can be utilized to estimate various amounts. This technique is mostly applied to survival data and product quality data similar to the incorporated relative mortality in a multiplicative model with outer rates and the cumulative infection rate in a straightforward epidemic model. It is shown that tallying measures produce a structure that permi

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3

Jiang, R. "A bias-corrected Nelson-Aalen estimator." IOP Conference Series: Materials Science and Engineering 1043, no. 2 (2021): 022013. http://dx.doi.org/10.1088/1757-899x/1043/2/022013.

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4

NJOMEN, Didier Alain NJAMEN. "Convergence of the Nelson-Aalen Estimator in Competing Risks." International Journal of Statistics and Probability 6, no. 3 (2017): 9. http://dx.doi.org/10.5539/ijsp.v6n3p9.

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In this paper, we study the simple convergence and the uniform convergence of the Nelson-Aalen nonparametric estimator studied in Njamen $\&$ Ngatchou (Njamen $\&$ Ngatchou, 2014) in a contest of competiting risks.

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El-Nouty, Charles, and Rémi Lancar. "The Presmoothed Nelson–Aalen Estimator in the Competing Risk Model." Communications in Statistics - Theory and Methods 33, no. 1 (2005): 135–51. http://dx.doi.org/10.1081/sta-120026582.

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6

Peña, Edsel A., and Vijay K. Rohatgi. "Small sample and efficiency results for the Nelson-Aalen estimator." Journal of Statistical Planning and Inference 37, no. 2 (1993): 193–202. http://dx.doi.org/10.1016/0378-3758(93)90088-n.

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7

GUILLEN, MONTSERRAT, JENS P. NIELSEN, and ANA M. PEREZ-MARIN. "Improving the Efficiency of the Nelson?Aalen Estimator: the Naive Local Constant Estimator." Scandinavian Journal of Statistics 34, no. 2 (2007): 419–31. http://dx.doi.org/10.1111/j.1467-9469.2006.00541.x.

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8

Hu, Guanyu, and Fred Huffer. "Modified Kaplan–Meier Estimator and Nelson–Aalen Estimator with Geographical Weighting for Survival Data." Geographical Analysis 52, no. 1 (2019): 28–48. http://dx.doi.org/10.1111/gean.12185.

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9

ZORIN, A. V., A. D. TSODIKOV, G. M. ZHARINOV, and A. Y. YAKOVLEV. "THE SHAPE OF THE HAZARD FUNCTION IN CERVICAL CANCER SURVIVAL." Journal of Biological Systems 09, no. 03 (2001): 221–33. http://dx.doi.org/10.1142/s0218339001000360.

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The shape of the hazard function is of great interest in studies of the efficacy of cancer treatment and post-treatment cancer surveillance. We present estimates of the hazard rates obtained from data on survival of patients with cervical cancer and discuss associated methodological problems. Our study was carried out on survival data for 1826 women with cancer of the cervix uteri stratified by clinical stage and tumor growth pattern. We used nonparametric and various smoothing techniques for estimating the hazard function from the data; these were a nonparametric estimator based on the Nelson

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Hermawan, Toto, Dwi Nurrohmah, and Ismi Fathul Jannah. "Estimasi Fungsi Survival dan Fungsi Hazard Kumulatif Pada Data Survival Pederita Multiple Myeloma Serta Faktor-faktor yang Mempengaruhi Waktu Survivalnya." Intersections 4, no. 2 (2019): 33–43. http://dx.doi.org/10.47200/intersections.v4i2.507.

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Multiple myeloma is an infectious disease characterized by the accumulation of abnormal plasma cells, a type of white blood cell, in the bone marrow. The main objective of this data analysis is to investigate the effect of Bun, Ca, Pcells and Protein risk factors on the survival time of multiple myeloma patients from diagnosis to death. In the survival data analysis, the observed random variable T is the time needed to achieve success. To explain a random variable, the cumulative distribution function or the probability density function can be used. In survival analysis, the function of the ra

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Hekmatnia, Hasan, Mir Najaf Mousavi, Kamran Jafarpour Ghalehteimouri, Ali Shamsoddini, Ali Bagheri Kashkouli, and Alireza Jamshidi. "Population Aging Tendencies in Islamic Countries Between 1950-2020: A Geographical Assessment." Journal of Population and Social Studies 30 (September 10, 2021): 36–53. http://dx.doi.org/10.25133/jpssv302022.003.

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In the contemporary world, population aging and the factors affecting population aging are among the topics of interest of policymakers and planners in any country. Knowledge of this situation will help to regulate and even advance substantial population programs. This study aimed to investigate the trend of the demographic aging index in Islamic countries based on the analysis of survival history. The research method was descriptive-analytical, a type of applied research, and methods of collecting documentary information. The United Nations Population Database (1950 to 2020) was used for data

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12

Cao, Ricardo, Ignacio López-de-Ullibarri, Paul Janssen, and Noël Veraverbeke. "Presmoothed Kaplan–Meier and Nelson–Aalen estimators." Journal of Nonparametric Statistics 17, no. 1 (2005): 31–56. http://dx.doi.org/10.1080/10485250410001713981.

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13

Winnett, Angela, and Peter Sasieni. "Adjusted Nelson–Aalen Estimates With Retrospective Matching." Journal of the American Statistical Association 97, no. 457 (2002): 245–56. http://dx.doi.org/10.1198/016214502753479383.

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14

Bluhmki, Tobias, Dennis Dobler, Jan Beyersmann, and Markus Pauly. "The wild bootstrap for multivariate Nelson–Aalen estimators." Lifetime Data Analysis 25, no. 1 (2018): 97–127. http://dx.doi.org/10.1007/s10985-018-9423-x.

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15

Macdonald, A. S. "An Actuarial Survey of Statistical Models for Decrement and Transition Data, II. Competing Risks, Non-Parametric and Regression Models." British Actuarial Journal 2, no. 2 (1996): 429–48. http://dx.doi.org/10.1017/s1357321700003469.

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ABSTRACTThis paper surveys some statistical models of survival data. Competing risks models are described; the unidentifiability of net decrements suggests a sceptical approach to the use of underlying single decrement tables. Approaches based on observations of complete lifetimes (with censoring) are surveyed including the Kaplan-Meier and Nelson-Aalen estimates. Regression models for lifetimes depending on covariates are discussed, in particular the Cox model and partial likelihood estimation.

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16

Njamen-Njomen, Didier Alain, and Joseph Ngatchou-Wandji. "Nelson-Aalen and Kaplan-Meier Estimators in Competing Risks." Applied Mathematics 05, no. 04 (2014): 765–76. http://dx.doi.org/10.4236/am.2014.54073.

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17

Colosimo, Enrico, Fla´vio Ferreira, Maristela Oliveira, and Cleide Sousa. "Empirical comparisons between Kaplan-Meier and Nelson-Aalen survival function estimators." Journal of Statistical Computation and Simulation 72, no. 4 (2002): 299–308. http://dx.doi.org/10.1080/00949650212847.

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18

Zhang, Haimeng, and M. Bhaskara Rao. "On Nelson–Aalen type estimation in the partial Koziol–Green model." Statistics 44, no. 5 (2010): 455–65. http://dx.doi.org/10.1080/02331880903348465.

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19

Yong, Mellissa, Carrie Kuehn, Michael Kelsh, Meghan Wagner, Allen Yang, and Janet Franklin. "Associations Between Platelet Count and Survival and Disease Progression In Thrombocytopenic Patients with Myelodysplastic Syndromes." Blood 116, no. 21 (2010): 2905. http://dx.doi.org/10.1182/blood.v116.21.2905.2905.

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Abstract Abstract 2905 Introduction: Myelodysplastic syndromes (MDS) are a group of malignant bone marrow stem cell disorders characterized by a predisposition for transformation to acute myelogeneous leukemia (AML). MDS disorders are heterogeneous in their morphology, cytogenetics, survival time, and ability to transform to AML. Although numerous classification schemes have been developed to provide a reproducible method for estimating patient survival and risk of leukemic evolution, research continues to identify factors that affect prognosis and survival time (e.g., treatment type, WHO FAB

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20

Rossa, Agnieszka. "The Nelson–Aalen and Kaplan–Meier Estimators Under a Sequential Sampling Scheme." Communications in Statistics - Theory and Methods 38, no. 16-17 (2009): 3077–98. http://dx.doi.org/10.1080/03610920902947568.

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21

Datta, Somnath, and Glen A. Satten. "Validity of the Aalen–Johansen estimators of stage occupation probabilities and Nelson–Aalen estimators of integrated transition hazards for non-Markov models." Statistics & Probability Letters 55, no. 4 (2001): 403–11. http://dx.doi.org/10.1016/s0167-7152(01)00155-9.

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22

Luo, Dali, and Sam C. Saunders. "Bias and mean-square error for the kaplan-meier and nelson-aalen estimators." Journal of Nonparametric Statistics 3, no. 1 (1993): 37–51. http://dx.doi.org/10.1080/10485259308832570.

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23

Martell, Kevin, Patrick Cheung, Gerard Morton, et al. "Hypofractionated, accelerated radiotherapy to the prostate bed: Five-year outcomes of a prospective phase I/II study." Journal of Clinical Oncology 37, no. 7_suppl (2019): 7. http://dx.doi.org/10.1200/jco.2019.37.7_suppl.7.

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7 Background: There have been few studies to date that examine the role of hypofractionated radiotherapy for prostate cancer in the post-operative setting. This study reports on the 5-year outcomes from a single institution, prospective, phase I/II study on hypofractionated prostate bed radiotherapy. Methods: Patients enrolled in this study were all eligible for post-operative radiotherapy and received a prescribed dose of 51Gy in 17 fractions to the prostate bed. On subsequent follow-up, GI/GU toxicity was assessed using the NCI CTCAE v3.0, PSA was evaluated and quality-of-life was assessed u

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24

De Uña-Álvarez, Jacobo. "Nelson–Aalen and product-limit estimation in selection bias models for censored populations." Journal of Nonparametric Statistics 16, no. 5 (2004): 761–77. http://dx.doi.org/10.1080/1048525042000191512.

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Njomen, Didier Alain Njamen. "Asymptotic Normality of the Nelson-Aalen and the Kaplan-Meier Estimators in Competing Risks." Applied Mathematics 10, no. 07 (2019): 545–60. http://dx.doi.org/10.4236/am.2019.107038.

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26

Gui, Eng Hock, and Angus Macdonald. "A Nelson-Aalen Estimate of the Incidence Rates of Early-Onset Alzheimer's Disease Associated with the Presenilin-1 Gene." ASTIN Bulletin 32, no. 1 (2002): 1–42. http://dx.doi.org/10.2143/ast.32.1.1012.

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AbstractWe analyse, in a probabilistic setting, Newcombe's (1981) life table method of estimating rates of onset of high-penetrance single-gene disorders, and extend this to a counting process model for individual life histories, including movement between risk groups arising from genetic testing and onset in relatives. A key result is that estimates of rates of onset at any age x must be conditioned only on information available when subjects were age x, even though their later life histories might be available to the investigator. This determines the data that must be included in pedigrees.

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Anevski, Dragi. "Functional central limit theorems for the Nelson–Aalen and Kaplan–Meier estimators for dependent stationary data." Statistics & Probability Letters 124 (May 2017): 83–91. http://dx.doi.org/10.1016/j.spl.2017.01.005.

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28

Chen, T., S. Tracy, and H. Uno. "OptBand: optimization-based confidence bands for functions to characterize time-to-event distributions." Lifetime Data Analysis 27, no. 3 (2021): 481–98. http://dx.doi.org/10.1007/s10985-021-09522-8.

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AbstractClassical simultaneous confidence bands for survival functions (i.e., Hall–Wellner, equal precision, and empirical likelihood bands) are derived from transformations of the asymptotic Brownian nature of the Nelson–Aalen or Kaplan–Meier estimators. Due to the properties of Brownian motion, a theoretical derivation of the highest confidence density region cannot be obtained in closed form. Instead, we provide confidence bands derived from a related optimization problem with local time processes. These bands can be applied to the one-sample problem regarding both cumulative hazard and sur

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Espinosa, Carolina, and Angus Macdonald. "A Correction for Ascertainment Bias in Estimating Rates of Onset of Highly Penetrant Genetic Disorders." ASTIN Bulletin 37, no. 02 (2007): 429–52. http://dx.doi.org/10.2143/ast.37.2.2024075.

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Estimation of rates of onset of rare, late-onset dominantly inherited genetic disorders is complicated by: (a) probable ascertainment bias resulting from the ‘recruitment’ of strongly affected families into studies; and (b) inability to identify the true ‘at risk’ population of mutation carriers. To deal with the latter, Gui &amp; Macdonald (2002a) proposed a non-parametric (Nelson-Aalen) estimate (x) of a simple function Λ(x) of the rate of onset at age x. The function Λ(x) had a finite bound, which was an increasing function of the probability p that a child of an affected parent inherit

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Espinosa, Carolina, and Angus Macdonald. "A Correction for Ascertainment Bias in Estimating Rates of Onset of Highly Penetrant Genetic Disorders." ASTIN Bulletin 37, no. 2 (2007): 429–52. http://dx.doi.org/10.1017/s051503610001494x.

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Estimation of rates of onset of rare, late-onset dominantly inherited genetic disorders is complicated by: (a) probable ascertainment bias resulting from the ‘recruitment’ of strongly affected families into studies; and (b) inability to identify the true ‘at risk’ population of mutation carriers. To deal with the latter, Gui & Macdonald (2002a) proposed a non-parametric (Nelson-Aalen) estimate (x) of a simple function Λ(x) of the rate of onset at age x. The function Λ(x) had a finite bound, which was an increasing function of the probability p that a child of an affected parent inherits th

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Alonso, Sara, Martina Manni, Clementine Sarkozy, et al. "Risk of Histological Transformation in Patients with Primary Refractory Follicular Lymphoma." Blood 132, Supplement 1 (2018): 4145. http://dx.doi.org/10.1182/blood-2018-99-115956.

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Abstract INTRODUCTION There is a growing interest in analyzing the biological and clinical variables that might help in identifying patients at risk of histological transformation (HT), a critical event that can still lead to reduced survival in patients with follicular lymphoma (FL). As part of the Aristotle study, we have previously reported that the risk of HT as a first event has been significantly reduced by the use of rituximab (Federico et al, Lancet Hematology 2018). However, this incidence might still be unacceptable in some groups of patients. Thus, we investigated the risk of HT in

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Di Rocco, Alice, Arianna Di Rocco, Alessio Farcomeni, et al. "Relapsed/Refractory Diffuse Large B-Cell Lymphoma (R/R DLBCL) Patients: A Retrospective Analysis of Eligibility Criteria for CAR-T Cell Therapy." Blood 134, Supplement_1 (2019): 2888. http://dx.doi.org/10.1182/blood-2019-131417.

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BACKGROUND. Patients (pts) with diffuse large B-cell lymphoma (DLBCL) refractory to second-line therapy or relapsed after an autologous stem cell transplant (ASCT) have a very poor clinical outcome with a median overall survival (OS) of 5 and 8-10 months, respectively. Autologous anti-CD19 chimeric antigen receptor (CD19 CAR) T cells have been associated with sustained complete remissions and long-term survivals in a large proportion of pts with R/R DLBCL by the two pivotal clinical trials Zuma1 and Juliet. This has led to the rapid approval by FDA and then by EMA of CAR-T cells for the third-

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Zulkarnaev, A. B. "Features of survival analysis on patients on the «waiting list» for kidney transplantation." Bulletin of Siberian Medicine 18, no. 2 (2019): 215–22. http://dx.doi.org/10.20538/1682-0363-2019-2-215-222.

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Survival analysis is one of the most common methods of statistical analysis in medicine. The statistical analysis of the transplantation (or death) probability dependent on the waiting time on the "waiting list" is a rare case when the survival analysis is used to estimate the time before the event rather than to indirectly assess the risks. However, for an assessment to be adequate, the reason for censoringmust be independent of the outcome of interest. Patients on the waiting list are not only at risk of dying, they can be excluded from the waiting list due to deterioration of the comorbid b

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Obesnyuk, V. F. "Group health risk parameters in a heterogeneous cohort. Indirect assessment as per events taken in dynamics." Health Risk Analysis, no. 2 (June 2021): 17–32. http://dx.doi.org/10.21668/health.risk/2021.2.02.

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The present work focuses on describing a procedure for assessing intensive and cumulative parameters of specific risk when observing cohorts under combined exposure to several external or internal factors. The research goal was to reveal how to use well-known heuristic-descriptive parameters accepted in remote consequences epidemiology for analyzing dynamics of countable events in a cohort; analysis should be performed on quite strict statistic-probabilistic grounds based on Bayesian approach to explaining conditional probabilities that such countable events might occur. The work doesn’t conta

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Obesnyuk, V. F. "Group health risk parameters in a heterogeneous cohort. Indirect assessment as per events taken in dynamics." Health Risk Analysis, no. 2 (June 2021): 17–32. http://dx.doi.org/10.21668/health.risk/2021.2.02.eng.

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The present work focuses on describing a procedure for assessing intensive and cumulative parameters of specific risk when observing cohorts under combined exposure to several external or internal factors. The research goal was to reveal how to use well-known heuristic-descriptive parameters accepted in remote consequences epidemiology for analyzing dynamics of countable events in a cohort; analysis should be performed on quite strict statistic-probabilistic grounds based on Bayesian approach to explaining conditional probabilities that such countable events might occur. The work doesn’t conta

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Glicksman, Rachel, Amar Upadhyaya Kishan, Alan W. Katz, et al. "Early surrogate measures for ablative therapies for intermediate-risk prostate cancer patients." Journal of Clinical Oncology 39, no. 6_suppl (2021): 241. http://dx.doi.org/10.1200/jco.2021.39.6_suppl.241.

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241 Background: Stereotactic body radiotherapy (SBRT) is increasingly used to treat patients with intermediate-risk prostate cancer (IR-PCa), but there is a lack of early surrogate measures in this patient population treated with SBRT to guide clinicians and patients. We aim to explore the outcomes of IR-PCa patients treated with SBRT and to assess the role of PSA response at 4 years (4yPSARR) as an early surrogate measure given its encouraging results in patients treated with brachytherapy. Methods: Individual patient data from 6 institutions for 820 patients with IR-PCa treated with SBRT bet

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Guru Murthy, Guru Subramanian, Aniko Szabo, Mehdi Hamadani, Timothy S. Fenske, and Nirav N. Shah. "Improvements in Clinical Outcomes of Advanced Stage Classical Hodgkin Lymphoma in the United States from 2000-2014: Analysis of Surveillance Epidemiology and End Results Database." Blood 132, Supplement 1 (2018): 2939. http://dx.doi.org/10.1182/blood-2018-99-116774.

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Abstract Background: Advanced Stage Hodgkin lymphoma (HL) is a curable malignancy with combination chemotherapy. While most patients are cured with frontline therapy, for those with refractory disease or early progression, historically, the outcomes have been poor. Novel therapies, PET/CT adapted treatment approaches, and improvement in transplantation have changed the management of both frontline and relapsed HL. However, it remains unknown if these developments have improved the clinical outcomes at population level over time. Methods: Using Surveillance Epidemiology and End Results database

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Garside, K., A. Gjoka, R. Henderson, H. Johnson, and I. Makarenko. "Event History and Topological Data Analysis." Biometrika, November 16, 2020. http://dx.doi.org/10.1093/biomet/asaa097.

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Abstract Persistent homology is used to track the appearance and disappearance of features as we move through a nested sequence of topological spaces. Equating the nested sequence to a filtration and the appearance and disappearance of features to events, we show that simple event history methods can be used for the analysis of topological data. We propose a version of the well known Nelson-Aalen cumulative hazard estimator for the comparison of topological features of random fields and for testing parametric assumptions. We suggest a Cox proportional hazards approach for the analysis of embed

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Skogvoll, Eirik, David G. Buckler, Trond Nordseth, et al. "Abstract 238: In-Hospital Cardiac Arrest: The Dynamic Clinical Course During Advanced Cardiac Life Support." Circulation 138, Suppl_2 (2018). http://dx.doi.org/10.1161/circ.138.suppl_2.238.

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Background: Sudden cardiac arrest may present with one of three clinical states (rhythms): Ventricular fibrillation/tachycardia (VF/VT), Pulseless Electrical Activity (PEA), or Asystole (ASY). During Advanced Cardiac Life Support (ACLS), the patient may also transition between the other states or reach temporary ROSC (defined as an organized electrical rhythm without chest compressions >= 1 min). Finally, either sustained ROSC or death will ensue. The aim of study was to investigate and quantify the dynamic characteristics of this process and compare with previous studies. Methods: As part

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Nordseth, Trond, Dana Niles, Trygve Eftestøl, et al. "Abstract 110: The Dynamic Clinical Course of Resuscitation in Children With Cardiac Arrest." Circulation 138, Suppl_2 (2018). http://dx.doi.org/10.1161/circ.138.suppl_2.110.

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Background: During cardiac arrest, a child may be in one of five clinical states (“rhythms”): 1) Bradycardia with poor perfusion; 2) Pulseless Electrical Activity (PEA); 3) Ventricular Fibrillation or Pulseless Ventricular Tachycardia (VF/VT); 4) Asystole; or 5) Spontaneous Circulation (ROSC). The aim of study was to investigate and quantify the dynamic characteristics of this process. Methods: We prospectively acquired data on rhythm and clinical states using recording defibrillators during active CPR. Recordings were analyzed as a multi-state statistical model, focusing on transitions betwee

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Birhanu, Molla Yigzaw, Cheru Tesema Leshargie, Animut Alebel, et al. "Incidence and predictors of loss to follow-up among HIV-positive adults in northwest Ethiopia: a retrospective cohort study." Tropical Medicine and Health 48, no. 1 (2020). http://dx.doi.org/10.1186/s41182-020-00266-z.

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Abstract Background Despite the rapid expansion of antiretroviral therapy services, ‘loss to follow-up’ is a significant public health concern globally. Loss to follow-up of individuals from ART has a countless negative impact on the treatment outcomes. There is, however, limited information about the incidence and predictors of loss to follow-up in our study area. Thus, this study aimed to determine the incidence rate and predictors of loss to follow-up among adult HIV patients on ART. Methods A retrospective cohort study was undertaken using 484 HIV patients between January 30, 2008, and Jan

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Karampouga, Maria, Fotis Tsetsos, Pavlos Sakellariou, and Ioannis Baltas. "Outcomes and issues of 12 chordomas treated in a single center." Egyptian Journal of Neurology, Psychiatry and Neurosurgery 57, no. 1 (2021). http://dx.doi.org/10.1186/s41983-021-00306-3.

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Abstract Background Chordomas stem from notochordal vestiges and rank as low-grade bone malignancies although fraught with high risk of recurrence. This study assesses the clinical outcomes of twelve chordoma cases treated in our clinic, in an effort to shed light on the often under-represented pool of results deriving from non-referral centers. Methods We reviewed the clinicopathological traits of all chordoma patients registered in our center since 1991. Major endpoints were overall survival (OS) and progression-free survival (PFS) estimated using the Kaplan–Meier and Nelson–Aalen methods. R

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Rodrigues, Adrian, Michael Chuwei Jin, Adela Wu, Gordon Li, and Gerald A. Grant. "Risk of Subsequent Primary Cancers After External Beam Radiotherapy Treatment of Pediatric Low Grade Gliomas: A Surveillance, Epidemiology, and End Results Analysis 1973 to 2015." Neurosurgery 66, Supplement_1 (2019). http://dx.doi.org/10.1093/neuros/nyz310_135.

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Abstract INTRODUCTION Past studies have associated external beam radiotherapy (EBRT) with higher incidences of subsequent primary malignancies (SPMs). This link has been documented for leukemias, and prostate, thyroid, and bone cancers. However, the effects of EBRT on SPM development from low grade gliomas (LGGs) are not well understood. The aim of the present study was to characterize the risk of SPM development after EBRT treatment of LGGs. METHODS A total of 1439 pediatric (age 0-17) records between 1973 and 2015 were assembled from the Surveillance, Epidemiology, and End Results (SEER) dat

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Li, Yang, Su Lu, Yuhan Zhang, Shuaibing Wang, and Hong Liu. "Loco-regional recurrence trend and prognosis in young women with breast cancer according to molecular subtypes: analysis of 1099 cases." World Journal of Surgical Oncology 19, no. 1 (2021). http://dx.doi.org/10.1186/s12957-021-02214-5.

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Abstract Background The number of young patients diagnosed with breast cancer is on the rise. We studied the rate trend of local recurrence (LR) and regional recurrence (RR) in young breast cancer (YBC) patients and outcomes among these patients based on molecular subtypes. Methods A retrospective cohort study was conducted based on data from Tianjin Medical University Cancer Institute and Hospital for patients ≤ 35 years of age with pathologically confirmed primary invasive breast cancer surgically treated between 2006 and 2014. Patients were categorized according to molecular subtypes on the

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Kassa, Getahun Molla, Alemayehu Shimeka Teferra, Haileab Fekadu Wolde, Atalay Goshu Muluneh, and Mehari Woldemariam Merid. "Incidence and predictors of lost to follow-up among drug-resistant tuberculosis patients at University of Gondar Comprehensive Specialized Hospital, Northwest Ethiopia: a retrospective follow-up study." BMC Infectious Diseases 19, no. 1 (2019). http://dx.doi.org/10.1186/s12879-019-4447-8.

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Abstract Background The emergence of Drug-Resistance Tuberculosis (DR-TB) is an increasing global public health problem. Lost to Follow-up (LTFU) from DR-TB treatment remains a major barrier to tuberculosis epidemic control and better treatment outcome. In Ethiopia, evidences on the incidence and predictors of LTFU are scarce. Thus, this study aimed to determine the incidence and identify the predictors of LTFU among DR-TB patients. Methods A retrospective follow-up study was conducted among a total of 332 DR-TB patients at the University of Gondar comprehensive specialized hospital. Data were

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