풍선 추체 성형술 후 새로운 골절 발생에 대한 생존율 및 위험 인자 분석

김정훈,김동혁 대한척추외과학회 2018 대한척추외과학회지 Vol.25 No.3

Study Design: Retrospective study. Objectives: To evaluate the factors related to the incidence of a new fracture in an adjacent vertebra after kyphoplasty for single vertebral body fracture due to osteoporosis and to assess the impact of such factors on patients’ survival rate. Summary of Literature Review: It is controversial whether fracture of an adjacent vertebra after kyphoplasty is due to the natural course of osteoporosis or as a complication of kyphoplasty. Materials and Methods: From December 2006 to December 2016, among 490 cases of kyphoplasty for single vertebral body fracture due to osteoporosis, 153 cases were analyzed retrospectively. The survival rate was analyzed based on age, gender, body mass index (BMI), fracture level, leakage of cement, amount of cement, compression rate, recovery rate, bone density, osteoporotic medication rate and compliance, existence of a compression fracture, hypertension, diabetes, and smoking habit. The average follow-up duration was 15.1 months (range, 1 month to 8 years and 8 months) and the mean age was 74.4 years (range, 54-93 years). Results: A new fracture in an adjacent vertebral body occurred in 27 cases (17.3%). The 1-year survival rate was 82.6%, the 2-year survival rate was 72.5%, and the 6-year survival rate was 53.7%. The survival rate was significantly higher in patients younger than 75 years (p=0.0495). The survival rate was also significantly higher in patients with a preoperative vertebral bone density greater than −3.7 and hip bone density greater than −2.2 (p<0.0001, p=0.0114). The survival rate was significantly higher in patients with a BMI greater than 18.1 kg/m2 at the time of surgery (p=0.0014). Furthermore, the survival rate was significantly higher in patients with a postoperative recovery of vertebral height of 14% or less (p=0.0031). In addition, the survival rate was higher in patients without a compression fracture before surgery (p=0.0297). In multiple factor analysis, vertebral bone density (p=0.0049) and age (p=0.0408) were identified as statistically significant factors. Conclusions: The survival rate was significantly lower at 1, 2, and 6 years in patients with an adjacent vertebral fracture. The most crucial factors affecting the survival rate were age and vertebral bone density. 연구 계획: 후향적 연구목적: 골다공증으로 인한 단일 추체 압박 골절에서 풍선 추체 성형술 후 인접 추체 골절 발생에 대한 생존율을 분석하고 그에 관여하는 요인을 알아보고자 하였다. 선행 연구문헌의 요약: 풍선 추체 성형술 후 인접 추체에 새로운 골절 발생이 수술에 의한 것인지 골다공증의 자연 경과인지에 대해 논란이 많다. 대상 및 방법: 2006년 12월부터 2016년 12월까지 본 교실에서 골다공증으로 인한 단일 추체 압박골절에 대해 풍선 추체 성형술을 시행 받은 총 490예중 추적 가능했던 153예를 대상으로 후향적으로 인접 추체에 새로운 골절 발생에 대한 생존분석을 시행하였다. 시술 시 나이, 성별, 체질량 지수, 골절 부위, 추간판 내로의 시멘트 유출, 시멘트 양, 시술 전 압박율, 시술 후 추체 높이 회복율, 술 전 골밀도, 술 후 골다공증 약물 복용 여부 및 순응도, 술 전 압박골절 유무, 고혈압, 당뇨 및 흡연 여부 등에 따른 생존 분석을 시행하였다. 평균 추시 기간은 15.1개월(1개월~8년 8개월), 시술 시 평균 나이는 74.4세(54~93세)였다. 결과: 총 153예 중 인접 추체에 새로운 골절이 발생한 경우는 27예(17.3%) 였으며 추체 압박골절 환자에서 풍선 추체 성형술 후 인접 추체에 새로운 골절발생이 없었던 1년 생존율은 82.6%, 2년 생존율은 72.5%, 6년 생존율은 53.7%였다. 수술 당시 나이 75세를 기준으로 75세 이하의 생존율이 유의하게높게 분석되었으며(p=0.0495) 술 전 척추 골밀도 -3.7을 기준으로 -3.7 초과, 술 전 고관절 골밀도 -2.2를 기준으로 -2.2 초과인 환자에서 생존율이 유의하게 높게 분석되었다(p<0.0001, p=0.0114). 또한, 수술 당시 체질량 지수 18.1을 기준으로 18.1 초과인 환자에서 생존율이 유의하게 높게 분석되었고(p=0.0014) 술 후 추체 높이 회복율 14%를 기준으로 14% 이하일 경우 생존율이 유의하게 높게 분석되었으며(p=0.0031). 술 전 압박 골절이 없는 경우에도 생존율이 유의하게 높게 분석되었다(p=0.297). 다중인자 분석에서는 수술 당시 나이(p=0.0408)와 술 전 척추 골밀도(p=0.0049)가 통계적으로 의미있는 요인으로 분석되었다. 결론: 골다공증성 압박 골절로 풍선 추체 성형술 후 인접 분절 추체에 새로운 골절 발생에 대한 생존율은 1년, 2년, 6년째에 의미 있는 감소가 있었고 생존 분석 결과 가장 중요한 인자는 나이와 술 전 척추 골밀도로 볼 수 있다. 약칭 제목: 풍선 성형술 후 인접 추체 골절 생존율

소아 청소년 골육종 재발 후 치료성적 : 한국의 단일기관 성적

이윤정,이현재,김동호,임중섭,이준아,박경덕,전대근,이수용 대한소아청소년과학회 2008 Clinical and Experimental Pediatrics (CEP) Vol.51 No.1

Purpose:Osteosarcoma is the most common primary malignant bone tumor in children and adolescents. Although survival rate of osteosarcoma patients has markedly improved, about 20-30% of patients still have a relapse. This study was aimed to find factors that influence postrelapse survival of osteosarcoma in childhood and adolescents. Methods:Between 1985 and 2004, of 461 patients who were diagnosed and treated as osteosarcoma in Korean Cancer Center Hospital, 180 patients with recurrent osteosarcoma were retrospectively reviewed. We examined survival rates and analyzed prognostic factors, such as relapse site, post-relapse treatment methods, pathologic response to neoadjuvnat chemotherapy, metastasis at first diagnosis, and relapse free interval. Results:The overall recurrence rate of patients with osteosarcoma was 39%. The 5-year and 10-year postrelapse survival rates in the recurrent osteosarcoma were 13% and 4%, respectively. The 5-year post-relapse survival rate was influenced by site of relapse (lung, 39%; local, 0%; lung & bone, 25%; others, 12%; P<0.05), relapse-free interval (<12 months, 13%; ≥12 months, 44%, P<0.05), and post- relapse treatment methods (with surgery, 38%; without surgery, 11%; P<0.05). Conclusion:The survival rate of recurrent case is very low after 10 years, so new second-line chemotherapy and active treatment is needed to increase survival. Aggressive surgery with the removal of recurrence sites combined with multi-agent chemotherapy could either cure patients with recurrent osteosarcoma or significantly prolong their survival. (Korean J Pediatr 2008;51:78-83) Purpose:Osteosarcoma is the most common primary malignant bone tumor in children and adolescents. Although survival rate of osteosarcoma patients has markedly improved, about 20-30% of patients still have a relapse. This study was aimed to find factors that influence postrelapse survival of osteosarcoma in childhood and adolescents. Methods:Between 1985 and 2004, of 461 patients who were diagnosed and treated as osteosarcoma in Korean Cancer Center Hospital, 180 patients with recurrent osteosarcoma were retrospectively reviewed. We examined survival rates and analyzed prognostic factors, such as relapse site, post-relapse treatment methods, pathologic response to neoadjuvnat chemotherapy, metastasis at first diagnosis, and relapse free interval. Results:The overall recurrence rate of patients with osteosarcoma was 39%. The 5-year and 10-year postrelapse survival rates in the recurrent osteosarcoma were 13% and 4%, respectively. The 5-year post-relapse survival rate was influenced by site of relapse (lung, 39%; local, 0%; lung & bone, 25%; others, 12%; P<0.05), relapse-free interval (<12 months, 13%; ≥12 months, 44%, P<0.05), and post- relapse treatment methods (with surgery, 38%; without surgery, 11%; P<0.05). Conclusion:The survival rate of recurrent case is very low after 10 years, so new second-line chemotherapy and active treatment is needed to increase survival. Aggressive surgery with the removal of recurrence sites combined with multi-agent chemotherapy could either cure patients with recurrent osteosarcoma or significantly prolong their survival. (Korean J Pediatr 2008;51:78-83)

창업이후 1인 창조기업의 생존율 변화 분석

최승두(Seung Doo Choi),김영춘(Young-choon Kim),홍재범(Jae-Bum Hong) 한국자료분석학회 2021 Journal of the Korean Data Analysis Society Vol.23 No.2

본 연구는 1인 창조기업의 창업 이후 생존율과 누적생존율을 분석한 것이다. 기술보증기금의 자료를 바탕으로 1인 창조기업의 창업 이후 생존율과 그 변화를 빈도분석과 생존분석(카플란-메이어)을 활용하여 분석하였다. 1인 창조기업의 특성으로 창업자의 성별, 나이, 학력, 동종업종경험 그리고 사업특성으로 창업형태, 영위업종을 고려하였다. 창업주체를 기준으로 볼 때, 남성이 차지하는 비중은 높지만, 성별에 따른 생존율 차이는 거의 없다. 20대가 차지하는 비중은 작고, 20대의 생존율은 낮다. 20대의 생존율은 완만하게 하락하다 12개월을 기점으로 급격히 하락하였다. 학력은 대졸과 고졸이하가 대부분이며, 고졸이하의 생존율은 낮다. 고졸의 생존율은 완만히 하락하다 12개월을 기점으로 급락하여 20대의 생존율과 유사한 패턴을 보였다. 동종업종경험에 따른 생존율은 5년이하, 10년이하, 10년초과 사이에 큰 차이가 없다. 이들의 생존율은 일정하게 하락하는 경향이 있다. 창업형태는 개인사업자가 다수이지만 법인과 개인사업자 간 생존율 차이는 없다. 영위업종에서는 제조업이 서비스업이 비해 낮고 생존율도 시간의 흐름에 따라 일정하게 하락하였다. 1인 창조기업에서 가장 중요한 것은 창업자의 역량이며 학력이 높을수록 해당업종의 경험이 많을수록 생존율이 높았다. 20대 창업이나 고졸창업, 5년미만 창업의 경우 생존율이 낮았다. This study analyzes the survival rate and cumulative survival rate of a one-man creative company after its founding. Based on the data from the Korea Technology Guarantee Fund, the survival rate and its changes after the founding of a one-man creative company are analyzed using frequency analysis and survival analysis (Kaplan-Meyer). As the characteristics of a single-person creative company, the founder s gender, age, education, experience in the same industry, and business characteristics are considered. Analysis on the types of business are also analyzed. Although the proportion of male is high, there is no difference in survival rates by gender. The proportion of those in their 20s is small, the survival rate in their 20s is low. The survival rate in the twenties declined gradually, and then declined sharply from 12th months. Most of them have a university degree or less than a high school graduate, and the survival rate for those with a high school graduate or less is low. The survival rate of high school graduates declined gradually, and then declined sharply from 12 months. There is no significant difference among 5 years or less, 10 years or less, and more than 10 years of experience in the same industry. Although there are many individual entrepreneurs, there is no difference in survival rate between corporations and individual entrepreneurs. In the business sector, the manufacturing industry is lower than that of the service industry, and the survival rate has declined consistently over time. The most important thing in a one-man creative enterprise is the competence of the founder, and the higher the education, and the more experienced in the industry, higher the survival rate. The survival rate is low in those in their twenties, high school graduates, and startups less than 5 years old.

구강내 부위별 편평 상피암종의 생존율에 관한 임상 연구

김경욱(Kyung-Wook Kim),이태희(Tae-Hee Lee) 대한구강악안면외과학회 2003 대한구강악안면외과학회지 Vol.29 No.5

Background : Important factors to determine treatment method and prognosis of oral cancer are anatomical site, tumor size, metastatic lesion, histologic cell differenciation and microvascular invasion. Anatomical site has great effect to oral cancer patient’s survival rate because each site’s accessibility and lymph node metastasis is different but this factor was’t studied much than other factors. Patients and Methods : 228 patients with squamous cell carcinoma of common primary sites(Mandible, Maxilla, Floor of Mouth and Tongue) in oral cavity who were diagnosed in the Korea Cancer Center Hospital from January 1989 to December 1999, were clinically studied and analyzed on survival rate. Results : 1. Survival rates of each anatomical sites were Tongue(36.8%), Mandible(33.3%), Maxilla(28.7%) and Floor of Mouth(24.5%). Survival rates difference between Tongue and Floor of Mouth has significance(p<0.05). 2. Survival rates for early cancer of each site were Maxilla(100%), Mandible(57.1%), Tongue(54.2%) and Floor of Mouth(46.7%). Survival rates difference between Maxilla and Floor of Mouth has significance(p<0.05). 3. Survival rates by surgery method of each site were Maxilla(60.6%), Tongue(56.9%), Mandible(44.8%) and Floor of Mouth(26.3%). Survival rates difference between Maxilla and Floor of Mouth has significance(p<0.05). 4. Survival rates by radiation or chemo method of each site were Floor of Mouth(23.5%), Mandible(20.0%), Maxilla(9.5%), and Tongue(9.1%). Survival rates difference between each site doesn’t have significance(p>0.05). 5. In advance stage, Survival rates by single therapy of each site were Tongue(33.6%), Mandible(23.5%), Floor of Mouth(16.7%), Maxilla(0%), and Survival rates difference between Maxilla and Tongue has significance (p<0.05). Survival rates by combination therapy of each site were Mandible(38.1%), Maxilla(30.0%), Floor of mouth(18.2%), Tongue(12.5%), and Survival rates difference between Mandible and Tongue has significance(p<0.05). Conclusion : Survival rate of tongue is higher than the other sites, early detection of oral cancer can increase survival rate at any site and combination therapy is the most effetive method, especially at maxilla.

국가유공자 암환자의 생존율

박운제 ( Un-je Park ) 한국보건행정학회 2021 보건행정학회지 Vol.31 No.1

Background: As a descriptive study targeting 2,068 cancer patients as men of national merit in 2013, this study aims to provide the basic data for systematizing the early diagnosis and treatment of cancer by comparatively analyzing the 5-year survival rate. Methods: This study researched the survival of cancer patients through Electronic Medical Record and Patriots-Veterans Qualification Program, targeting 2,068 newly-diagnosed cancer patients verified in five veterans hospitals and consigned management system. This study verified differences between general characteristics of cancer patients as men of national merit and analyzed their survival rate. Results: The cancer patients as men of national merit were super-aged as their average age was 72.5. In the analysis of general characteristics of five major prevalent cancers, there were statistically significant differences according to age, region, cancer diagnostic path, differentiation, diagnostic method, treatment method, SEER stage, and survival period, except for the types of the man of national merit (p<0.001). The whole survival rate of cancer patients as men of national merit was 50%. The 5-year survival rates of predisposing cancers were shown as prostate cancer (79%), colorectal cancer (64%), gastric cancer (57%), liver cancer (32%), and lung cancer (12%). In the cancer diagnostic path, all the predisposing cancers showed the highest survival rate in medical examination. In the treatment method, the surgery showed the highest survival rate. The cancer patients as men of national merit showed a lower survival rate than the general cancer patients of Korea. Conclusion: It would be needed to guarantee the honorable and happy life through health recovery as special treatment of contribution and sacrifice of super-aged men of national merit by increasing the cancer survival rates through regular checkup, early diagnosis, and high-quality treatment system that could have important effects on the survival rate according to the occurrence of cancers.

신장 이식 96 예에 대한 임상적 고찰

노임환(Im Hwan Roe),고윤석(Youn Suck Koh),안정경(Jung Kyung Ahn),박찬현(Chan Hyun Park),강종명(Chong Myung Kang),박한철(Han Chul Park),곽진영(Jin Young Kwag),원치규(Chi Kyu Won) 대한내과학회 1988 대한내과학회지 Vol.35 No.2

N/A We have performed 96 renal transplantations in Hanyang University Hospital since Apri11978. We have analyzed the complications and outcome of these patients in connection with the tissue types and other factors. The results are as follows; 1) The mean age of recipients was 34.4 years. They were most commonly in the 3rd and 4th decades. The male to female ratio was 4.3:l. 2) Among 96 patients, 74 patients received kidneys from living related donors, while 11 patients received donations from living unrelated donors. Eleven cases were cadaver transplantations. Of living related donors, mothers donated in 35 cases (36.5%) and siblings donated in 21 cases (21.9%). All of the cadaver donors were men. 3) HLA typing and cross matching were performed in 56 cases. The grade of the match was defined by the number of shared antigens between donor and recipient. Twenty-seven patients were matched for two antigens. Twelve patients were matched for one antigen, while 12 patients were matched for 3 antigens. Six patients were HLA identical. A mixed lymphoeyte culture was done in 55 patients of there. 33 patients were low responders, who showed less than 55% relative response, 6 patients were high responders (over 100% response), and 16 patients belonged to intermediate group. 4) The recovery rate from acute rejection was 56.5% in living related transplantation patients (sibling; 57.8%, parent and child; 55.1%). In living unrelated transplantation patients, the recovery rate was 50.0%, and it was 42.8% in cadaver transplantation patients. The recovery rate of acute rejection was varied among the different HLA match grades; 62.5% for the group with one antigen matched, 67.0% for two antigens matched, and 100% for four antigens matched. Of low MLC responders, 72% recovered from acute rejection; the higher the relative response, the lower the recovery rates. 5) The Seventy-two of 96 cases were complicated by infertion, mainly pneumonia, fungal infection. The sixty nine of 96 cases were complicated by nonifectious causes, suchas acute tubular necrosis, avascular necrosis of bone, cataract, glaucoma, peptic ulcer and diabetes. 6) The overall mortality rate was 26.0%. During the period of 1978 through 1982, mortality was higher (80%) than that of the period of 1983 through 1987 (20%). The major cause of death before 1982 was infection, The major cause of death after 1983 were hepatic failure and pneumonia. 7) Patients with hepatitis B antigenmia did poorly. Four patients died of hepatic failure, and two patients lost graft. One patient became cirrhotic, 8) The overall patient survival rate was 84.8% at one year and 72.4% at 5 years. The graft survival rate was 81.3% at 1 year and 48.8% at 5 years resply. 8-1) The patient and graft survival rate for living related transplantation patients was 87.0%/82.6% at 1 year and 76.0%/46.7% at 5 years respoectively. The outcome was much better for transplantation between siblings than for parent-child combinations. 8-2) The patient and graft survival rate at 2 years according to HLA match was as follows; 88.9%/81.5% for the group with 2 antigens matched, 88.3%/75.0% for 3 antigens matched, and 100%/83.3% for 4 antigens matched. 8-3) The patient and graft survival rate at 2 years according to MLC was as follows; 96.7%/84.9% in low responders, 93.7%/74.0% in intermediate responders and 31.8%/31.8% in high responders, 8-4) The patient and graft survival rate was compared in patients using different immunosuppressives. Patients with imuran showed 87.0%/85.6% at 6 months and 85.5%/79.8% at 1 year respectively. Patients with cyclosporine showed 91.7%/91.7% at 6 months and 91.7% /86.6% at 1 year. 8-5) Regarding the effect of DST, patients who had not received a transfusion showed a patient and graft survival rate of 77.9%/68.0% at 2 years. Transfused patients did much better, showing survival rate of 96.5 %/84.0% at 2 years. Thus we conclude that MLC and DST greatly influence the survival rate after renal transplantat

청년창업기업의 생존율 변화 분석

박춘주(Choon Ju Park),홍재범(Jae-Bum Hong) 한국자료분석학회 2023 Journal of the Korean Data Analysis Society Vol.25 No.4

본 연구는 청년창업기업의 창업 이후 생존율과 누적생존율 변화를 분석한 것이다. 청년창업기업의 창업 이후 생존율과 그 변화를 기술보증기금의 자료를 바탕으로 교차분석과 생존분석 방법인 카플란-메이어 기법을 활용하여 분석하였다. 청년창업기업의 창업자 특성으로 연령, 성별, 학력, 동종업종경험을 고려하고, 사업특성으로 기업 형태, 창업 업종, 창업지역을 고려하였다. 창업자의 특성으로 성별과 연령은 생존율에서 차이가 없었다. 학력은 고졸 이하, 전문대졸, 대졸, 대학원졸 순으로 생존율이 낮다. 누적생존율은 고졸 이하의 경우 24개월 이후 급격히 하락하며 그이후에도 높은 학력 수준에 비해 크게 하락한다. 동종업종경험에 따른 생존율은 1년 미만에서가장 낮고, 10년 이상에서 가장 높은 생존율을 보였다. 누적생존율 분석에서는 초기 12개월을 제외하고는 생존율이 일관되게 1년 미만, 10년 미만, 10년 이상 순으로 낮았다. 기업 형태는 생존율에서 통계적으로 유의한 차이가 없다. 창업 업종에서는 제조업과 정보통신보다 서비스업의 생존율이 높은 것으로 분석되었다. 누적생존율 분석에서는 36개월까지는 큰 차이가 없었으나 그이후부터 서비스업이 제조업과 정보통신보다 일관되게 높았다. 창업지역별 생존율 차이는 유의하다. 누적생존율 분석에서는 36개월 이후부터 충청이 가장 높고, 영남이 가장 낮은 추세가 일관되었다. 이를 종합해보면 창업자의 역량 중 학력과 동업종 경험이 높을수록 생존율이 높고, 사업특성에서는 창업 업종과 창업 지역이 유의한 영향을 미치는 요인이다. This study analyzes the survival rate and cumulative survival rate of young start-ups after their start-up. Based on data from the Korea Technology Finance Corporation, the survival rate and changes of young start-ups since their start-up were analyzed using Chi-square test and the Kaplan-Meier technique. Due to the characteristics of the founder, gender and age do not differ in the survival rate, so they are not significant variables. In terms of education, the survival rate is low in the order of high school or less, college, university and graduate graduates. The survival rate according to experience in the same industry was the lowest in less than 1 year and the highest in 10 years or more. There is no statistically significant difference between corporations and individuals. In the start-up industry, the survival rate of the service industry was higher than that of manufacturing and information communication. Survival rates by start-up region were the lowest in Yeongnam and the highest in Chungcheong, showing a significant difference in survival rates between regions. Taken together, the most important thing in young entrepreneurship is the founder's competency, and the higher the level of education and experience in the same industry, the higher the survival rate.

Survival Rates of Cervical Cancer Patients in Malaysia

Muhamad, Nor Asiah,Kamaluddin, Muhammad Amir,Adon, Mohd Yusoff,Noh, Mohamed Asyraf,Bakhtiar, Mohammed Faizal,Tamim, Nor Saleha Ibrahim,Mahmud, Siti Haniza,Aris, Tahir Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.7

Cervical cancer is the most common malignant cancer of the female reproductive organs worldwide. Currently, cervical cancer can be prevented by vaccination and detected at an early stage via various screening methods. Malaysia, as a developing country faces a heavy disease burden of cervical cancer as it is the second most common cancer among Malaysian women. This population based study was carried out to fulfil the primary aim of determining the survival rates of Malaysian women with cervical cancer and associated factors. Data were obtained from two different sources namely, the Malaysian National Cancer Registry (MNCR) and National Health Informatics Centre (NHIC) from 1st January 2000 to 31st December 2005. Kaplan Meier analyses were conducted to identify the overall survival rates and median survival time. Differences in survival among different ethnic and age group were compared using the log-rank test. A total of 5,859 patients were included. The median survival time for cervical cancer in this study was 65.8 months and the 5-year survival rate was 71.1%. The overall observed survival rates at 1, 3 and 5 years were 94.1%, 79.3% and 71.1% respectively. The log-rank test finding also showed that there were significant differences in the 5-year survival rate among different ethnic groups. Malays had the lowest survival rate of 59.2% followed by Indians (69.5%) and Chinese (73.8%). The overall 5-year survival rate among patients with cervical cancer in Malaysia is relatively good. Age and ethnic groups remain as significant determining factors for cervical cancer survival rate.

폐암환자의 생존율에 영향을 미치는 예후인자

현미경,이태용 충남대학교 의학연구소 2003 충남의대잡지 Vol.30 No.2

This study was performed to know the survival rate and prognostic factors of lung cancer patient who were hospitalized in E university hospital among records in Daejeon cancer registry between 1993 to 2001. There were no differences between man and woman in terms of 1-year and 3-year survival rate. There was no difference between the survival rate of smoker and that of non-smoker. The survival rate of patients having hypertension was significantly different from that of patients not having hypertension. At the time of diagnosis, coughing, dyspnoea and chest pain were the most frequent clinical symptoms of these patients, but there were no differences in 1-year and 3-year survival rate according to the existence of these symptoms. The upper lobe was most frequent primary site of lung cancer. The survival rate of the patients whose primary site was the middle lobe was highest. The survival rate of squamous cell carcinoma was highest. Statistical significance according to the clinical symptoms of a patient demonstrated the symptoms such as coughing, dyspnoea or chest pain were related to the survival rate. Also it demonstrated that the prognostic factors such as age, primary lesion, and histology type affects the survival rate statistically significantly.

비외과적 근관치료의 개별치아 누적 생존율

김선미 ( Sun Mi Kim ),신호성 ( Hosung Shin ) 대한예방치과·구강보건학회 2017 大韓口腔保健學會誌 Vol.41 No.3

Objectives: The present study aimed to estimate the survival rate of teeth after non-surgical root canal treatment and to investigate the effect of income on the tooth survival rate. Methods: The study included 1,414.668 endodontically treated teeth from 1,193.666 persons enrolled in the National Health Insurance Service in 2002. A survival analysis of the teeth was performed using the Kaplan-Meier method. The survival rates were calculated using a follow-up period of 11 years after the root canal treatment. Results: In the present study, the 11-year cumulative survival rate of teeth after non-surgical endodontic treatments was 86.90%. The survival rates of teeth tended to decrease for the posterior teeth; the maxillary teeth showed a lower survival rate than that of the mandibular teeth. The teeth with the highest survival rates were the mandibular left lateral incisor, maxillary right incisor, mandibular right lateral incisor, and maxillary left central incisor, in that order. The lowest survival rates were shown by the mandibular second molar, maxillary second molar, maxillary first molar, and mandibular first molar, in that order. The survival rate of the first molar (#16, #26, #36, #46) was higher in the low-income group than in the high-income group (P<0.001). Conclusions: This study represents the outcome pattern of root canal treatment among South Korean individuals. These study findings can be used as comparative data for clinical decision making about endodontic treatment.