scholarly journals An examination of the cumulative survival rate of narrow-diameter dental implants in the mandibular molar region: a retrospective cohort study

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Keina Nagahisa ◽  
Korenori Arai ◽  
Shunsuke Baba
Keyword(s):  
Cohort Study ◽  
Survival Rate ◽  
Dental Implants ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Cumulative Survival Rate ◽  
Cumulative Survival ◽  
Mandibular Molar ◽  
Molar Region

A Retrospective Cohort Study of the Cumulative Survival Rate of Obturator Prostheses for Marsupialization

2017 ◽  
Vol 28 (2) ◽  
pp. e811-e816 ◽  
Author(s):  
Mamoru Murakami ◽  
Yasuhiro Nishi ◽  
Misaki Nishio ◽  
Yoko Minemoto ◽  
Takaharu Shimizu ◽  
...  
Keyword(s):  
Cohort Study ◽  
Survival Rate ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Cumulative Survival Rate ◽  
Cumulative Survival

scholarly journals Trends in 5-, 10-, 20-, and 30-year survival rates of beta-thalassemia patients in Southern Iran, 1995-2016: A retrospective cohort study

2017 ◽  
Author(s):  
Jafar Hassanzadeh ◽  
Alireza Mirahmadizadeh ◽  
Mehran Karimi ◽  
Yousef Veisani ◽  
Shahab Rezaeian
Keyword(s):  
Cohort Study ◽  
Survival Rate ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Survival Rates ◽  
Thalassemia Major ◽  
Beta Thalassemia ◽  
Birth Cohorts ◽  
Time Period ◽  
Causes Of Mortality

Background: There is currently lack of knowledge about survival trend analysis of thalassemia patients. Therefore, the aim of the present study was to assess 5-, 10-, 20-, and 30-year survival of thalassemia patients over a 20-year time period. Methods: In this retrospective cohort study, we analysed the data of 982 beta-thalassemia patients in Iran. Birth cohort and traditional cohort analyses were used to obtain the 5-, 10-, 20-, and 30-year survival rates in various time intervals between 1995 and 2016.Results: Five and 10-year survival rates remained unchanged since 1995-2016. Overall, 20- and 30-year survival rates were lower in younger birth cohorts than older ones. A declining trend was found in 20-year survival rate from 1995 to 2000 for all and also for thalassemia major patients, but was stable from 2001 to 2016. In addition, there was a declining trend in 30-year survival rate from 1995 to 2008 for all and also for thalassemia major patients, but was an increased trend from 2009 to 2016. Conclusion: Over the past two decades and in recent birth cohorts, the 20- and 30-year survival rates has declined. In other words, declining survival trends in the birth cohorts may be associated with some different causes of mortality such as exposure to the toxic effects of iron over time and the occurrence of diseaserelated mortality.

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