Modeling of Age-Dependent Failure Tendency from Incomplete Data

2013 ◽  
pp. 449-459
Author(s):  
P. Hagmark ◽  
J. Laitinen
Keyword(s):  
Incomplete Data ◽  
Age Dependent ◽  
Dependent Failure

Warranty costs: An age-dependent failure/repair model

2004 ◽  
Vol 51 (7) ◽  
pp. 959-976 ◽  
Author(s):  
Boyan Dimitrov ◽  
Stefanka Chukova ◽  
Zohel Khalil
Keyword(s):  
Age Dependent ◽  
Warranty Costs ◽  
Dependent Failure

scholarly journals A scaling approach to estimate the age-dependent COVID-19 infection fatality ratio from incomplete data

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0246831
Author(s):  
Beatriz Seoane
Keyword(s):  
Intensive Care ◽  
Incomplete Data ◽  
Death Certificates ◽  
Similar Increase ◽  
Antibody Prevalence ◽  
Exponential Increase ◽  
The World ◽  
Age Dependent ◽  
Official Records ◽  
Good Agreement

SARS-CoV-2 has disrupted the life of billions of people around the world since the first outbreak was officially declared in China at the beginning of 2020. Yet, important questions such as how deadly it is or its degree of spread within different countries remain unanswered. In this work, we exploit the ‘universal’ increase of the mortality rate with age observed in different countries since the beginning of their respective outbreaks, combined with the results of the antibody prevalence tests in the population of Spain, to unveil both unknowns. We test these results with an analogous antibody rate survey in the canton of Geneva, Switzerland, showing a good agreement. We also argue that the official number of deaths over 70 years old might be importantly underestimated in most of the countries, and we use the comparison between the official records with the number of deaths mentioning COVID-19 in the death certificates to quantify by how much. Using this information, we estimate the infection fatality ratio (IFR) for the different age segments and the fraction of the population infected in different countries assuming a uniform exposure to the virus in all age segments. We also give estimations for the non-uniform IFR using the sero-epidemiological results of Spain, showing a very similar increase of the fatality ratio with age. Only for Spain, we estimate the probability (if infected) of being identified as a case, being hospitalized or admitted in the intensive care units as function of age. In general, we observe a nearly exponential increase of the fatality ratio with age, which anticipates large differences in total IFR in countries with different demographic distributions, with numbers that range from 1.82% in Italy, to 0.62% in China or even 0.14% in middle Africa.

scholarly journals OC-0052: Long-term age dependent failure pattern after BCT vs. mastectomy in low-risk breast cancer patients

2016 ◽  
Vol 119 ◽  
pp. S22
Author(s):  
T. Laurberg ◽  
C. Lyngholm ◽  
J. Alsner ◽  
P. Chritiansen ◽  
J. Overgaard
Keyword(s):  
Breast Cancer ◽  
Cancer Patients ◽  
Low Risk ◽  
Failure Pattern ◽  
Breast Cancer Patients ◽  
Age Dependent ◽  
Dependent Failure ◽  
Risk Breast Cancer
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