e15104 Background: This nationwide study was conducted to demonstrate the difference of the treatment and the survival of elderly patients with colorectal cancer (CRC) by the analysis of big data using the Korean National Health insurance service (NHIS). Methods: We analyzed the NHIS database of CRC patients admitted hospitals which received its quality assessment between 2011 and 2014. According to age, we divided patients into three groups, non-elderly patients ( < 65 years old), borderline elderly patients (65-74 years old) and elderly patients (≥ 75 years old). Results: We included 70,701 CRC patients. Median follow-up duration was 3.2 years (range 0.003-5.5 years). Male patients were 60% and median age was 65 years old (range 18-102 years). Comparing with non-elderly patients, elderly patients more received emergency operation (p < 0.001) and less received adjuvant therapy in stage I-III or palliative chemotherapy in stage IV (p < 0.001). Survival probability at 3 year of borderline elderly patients and elderly patients showed worse survival rate than non-elderly patients [HR 1.55, 95% confidence interval (CI) 1.46 - 1.64, HR 3.19, 95% confidence interval (CI) 3.03 -3.37, respectively]. Conclusions: These results show the treatment and the poor survival of elderly patients with CRC according to age in Korea. More study to reveal the biology of them and to improve outcome is warranted. Our study was the first to describe these data for CRC at a nationwide level.
An analysis of the perceptions of dental implant plans in the Korean national health insurance and the dental clinic selection criteria among elderly patients in Hongseong-gun, Chungcheongnam-do
