Survival of Colorectal Cancer Patients in the Presence of Competing-Risk

Abstract

Background: Colorectal cancer (CRC) is considered to be a main cause of malignancy-related death in the world, being commonly diagnosed in both men and women. It is the third leading cause of cancer dependent death in the world and there are one million new cases diagnosed per year. In Iran the incidence of colorectal cancer has increased during the last 25 years and it is the fifth cause of cancer in men and the third in women. Materials and Methods: In this article we analyzed the survival of 475 colorectal patients of Taleghani hospital in Tehran with the semi-parametric competing-risks model. Results: There were 55% male cases and at the time of the diagnosis most of the patients were between 48 and 67years old. The probability of a patient death from colorectal cancer with survival of more than 25 years was about 0.4. Body mass index, height, tumour site and gender had no influence. Conclusions: According to these data and by using semi-parametric competing-risks method, we found out that only age at diagnosis has a significant effect on these patient survival time.

Demographic Survey of Four Thousand Patients with 10 Common Cancers in North Eastern Iran over the Past Three Decades

“…Mean age at diagnosis was 53 years that showed a rising trend between the studies periods divided by 5 years. There was no significant difference in age between men and women, and the male to female sex ratio was 1.3 which is similar to study of Ahmad Reza Baghestani and the study of Bello Arkilla Magaji (Baghestani et al, 2014, Magaji et al, 2014. In the studies of Safaee 2005Safaee -2009, published by Ministry of Health and the Cancer Registry, the mean age of patients was 53 years old with similar sex ratio to our study (Safaee et al, 2012).…”

Prevalence of Colorectal Polyps in a Group of Subjects at Average-risk of Colorectal Cancer Undergoing Colonoscopic Screening in Tehran, Iran between 2008 and 2013

“…CRC is considered the third cause of cancerrelated death in the world (Gupta et al, 2011;Siegel et al, 2012;Baghestani et al, 2014). Following breast cancer, it is the second most common cancer among women and is also the third most common cancer among men (Ansari et al, 2006;Ferlay et al, 2010;Siegel et al, 2012).…”

Relationships of Colorectal Cancer with Dietary Factors and Public Health Indicators: an Ecological Study

“…At first, CRC was widespread in advanced countries because the risk factors were prevalent there, but recently CRC communed in developing countries that had low risk factors (Caygill et al, 1996;Chao et al, 2005;Baghestani et al, 2014).…”