• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제38권1호
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• pp.20-28
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• 2012

Introduction: The objective of this research was to determine the incidence of oral cancer in Korea. Materials and Methods: The classifications of oral and maxillofacial cancer (OMFC) that we used are based on possible locations of OMFC: lip, tongue, mouth, salivary glands, tonsil, oropharynx, nasopharynx, hypopharynx, pharynx unspecified, and nose, sinuses. Results: 1) There were 2,848 OMFC cases, accounting for 1.6% of all cancers. The male to female ratio was 2.72:1. 2) The estimated crude rates (CRs) were 5.7 overall, 8.4 for males, and 3.1 for females. The age-standardized incidence rates (ASRs) were 4.6 overall, 7.3 for males and 2.3 for females. 3) The incidence of mouth cancer was highest. The mouth and salivary glands were the most frequent sites for cancer among males and females, respectively. 4) Patients who were 40 years or older accounted for 91% of OMFC cases, with the highest proportion of cases in the 60-69 year-old age group for both sexes. 5) Tongue cancer was the most prevalent OMFC overall. Nasopharyngeal cancer was highest among males, and salivary gland cancer was highest among females. 6) From 2004 to 2008, the relative 5-year survival rate of OMFC patients was 57.5%. There was a trend of increasing survival among OMFC patients during the study period. The survival rate for females (69.3%) was much higher than that for males (53.1%). Conclusion: Social and personal efforts should be required to increase the survival rates of OMFC patients and Korean national cancer management policy should establish new measures for economic and social management and support.

• Asian Pacific Journal of Cancer Prevention
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• 제14권3호
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• pp.1807-1811
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• 2013

Background: Colorectal cancer is a main leading cause of cancer death in western countries. Although many studies have been conducted on incidence trends all over the world in recent years, information regarding changes in incidence of colorectal cancer in Iran is insufficient. The present study of colorectal cancer in the west of Iran during recent years was therefore performed. Materials and Methods: The registered data for colorectal cancer cases in National Cancer Registry System were extracted from the Ministry of Health and Medical Education, Center for Disease Control and Management. The codes from 18-21 among cancers were selected for colon and rectum cancers. Incidence rates were standardized directly using WHO population. The significance of incidence rate trends during 2000-2005 was tested through Poisson regression. Results: 762 cases of colorectal cancer were observed during 6 years in this region, with a gender ratio of men to women of 1.2. It increased from 65 cases in 2000 to 213 cases in 2005 or from 1.5 per100,000 per persons per year to 4.8. Significant increasing trends were evident in Kermanshah and Hamadan provinces; however, change did not reach significance in Ilam and Kurdistan provinces. Conclusions: Colorectal cancer has an increasing trend in the west of Iran. Although it seems that the increasing rate of colorectal cancer is due to increasing of cancer risk factors, some proportion may be related to the improvement of surveillance systems in Iran.

• Asian Pacific Journal of Cancer Prevention
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• 제17권3호
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• pp.1421-1426
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• 2016

Background: There is a considerable lack of understanding of oral cancer incidence, especially its time trend in Iran. In this study, the authors aimed to analyze time trend of oral cancer incidence with a focus on differences by gender in a period of six years - from 2005 to 2010. Materials and Methods: Both population-based cancer registry and national cancer registry (NCR) data based on pathologic reports from 2005 to 2010 were obtained from the Ministry of Health and Medical Education (MOHME). Population data were also received from Statistical Centre of Iran. Age-standardized incidence rates (ASRs) based on the World Standard Population were then calculated. Finally, Negative Binomial regression was run for time trend analysis. Results: The maximum ASR for males was calculated as 2.5 per 100,000 person-years in 2008 and the minimum was observed as 1.9 per 100,000 person-years in 2005 and 2006. Meanwhile, the maximum ASR for females was estimated as 1.8 per 100,000 person-years in 2009 and the minimum was calculated as 1.6 per 100,000 person-years in 2005 and 2006. Additionally, in females, incidence risk ratio (IRR) did not show a clear decreasing or increasing trend during the six years. Nevertheless, in males an increasing trend was observed. The maximum IRR adjusted for age group and province, for females was reported in 2009 (IRR=1.05 95% CI: 0.90-1.23), and for males was estimated in 2010 (IRR=1/2 95% CI: 1.04 - 1.38). Conclusions: Our findings highlight disparities between oral cancer incidence trends in males and females over the six years from 2005 to 2010.

• 한국산학기술학회논문지
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• 제14권3호
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• pp.1234-1244
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• 2013

대전지역과 충남지역의 2000-2009년의 암등록 자료를 근거로 암 발생률 변화 및 지역간의 차이와 암등록 자료의 질적 수준을 평가하고자 하였다. 두 지역의 조발생률과 연령표준화 발생률을 비교하였고, 암발생 자료의 타당도는 연령미상률(Age UNK%), 조직학적 확진(HV%)과 DCO%로 보았고, 충실도는 M/I ratio로 평가하였다. 연령표준화 발생률의 발생률 차이는 포아송 분포로 평가하였고, 95% 신뢰구간을 계산하였다. 그리고 성별, 연령별, 지역별 차이는 발생률 곡선으로 비교하였다. 암종별 발생분율에서 위암은 대전이 18.8%, 충남이 21.5%로 가장 높았다. 대전지역 남성의 2000년 연령표준화 발생률은 322.1명, 2009년은 323.9명으로 10년간 0.6% 증가하였다. 여성의 경우 2000년 203.9명에서 2009년 326.8명으로 60.3%의 증가하였다. 충남지역의 남성은 2000년 294.7명에서 2009년 336.97명으로 14.3% 증가하였고, 여성은 2000년 156.5명, 2009년은 267.1명으로 70.7%의 증가하였다. 타당도의 연령미상률은 2000년부터 2009년까지 두 지역 모두 0.0%이었고, 조직학적 확진%는 남성은 71.8%에서 88.5%로 증가하였으며, 여성은 78.1%에서 93.2%로 증가하였다. DCO%는 남성에서 6.4%에서 0.7%로 낮아졌고, 여성은 5.4%에서 0.8%로 낮아졌다. 충실도의 MI%는 15.3%에서 62.1%로서 두 지역 모두 좋은 등록수준을 보였다.

• Asian Pacific Journal of Cancer Prevention
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• 제14권12호
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• pp.7587-7593
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• 2013

Background: Cancers of gastric and esophagus are the most frequent gastrointestinal (GI) tract cancers in Iran. This study aimed to analyze time trends of GI tract cancers in Guilan province by gender and age to provide solid scientific evidence for cancer prevention and control. Materials and Methods: The data were obtained from the Guilan Cancer Registry System and Guilan Provincial Health Center, over the 15 year period between 1997 and 2011. Crude incidence and age standardized (AS)incidence rates were calculated and annual percent change was estimated by Joinpoint software for long term trend analysis. Results: During the study period, 8,332 cases of GI malignances with a male to female ratio of 1:1.73 were registered in Guilan province. The AS rates for esophageal, gastric, colon and rectal cancers were 5.97, 14.5, 7.59 and 3.58 per 105 respectively. While the trend was declining and relatively constant for esophageal and gastric cancer, respectively, the incidence trend for colon and rectal cancers was of increase over the period of the study. Conclusions: The results indicated that the incidence of GI cancers was relatively low in Guilan province compared to neighboring provinces. An effective cancer control program including prevention measures, early detection and effective treatment needs to be implemented to reduce cancer morbidity and mortality.

• Asian Pacific Journal of Cancer Prevention
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• 제16권10호
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• pp.4193-4198
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• 2015

Background: Globally, retinoblastoma is the most common primary intraocular malignancy occurring in children. This paper documents the recent incidence rates of retinoblastoma by age and sex groups from the Population Based Cancer Registries (PBCRs) of Bangalore, Mumbai, Chennai, Delhi and Kolkata using the data from the National Cancer Registry Programme. Materials and Methods: Relative proportions, sex ratio, method of diagnosis, and incidence rates (crude and age standardized) for each PBCR and pooled rates of the five PBCRs were calculated for the years 2005/06 to 2009/10. Standard errors and 95% confidence limits of ASIRs by sex group in each PBCR were calculated using the Poisson distribution. Standardised rate ratios of ASIR by sex group and rate ratios at risk were also calculated. Results: The maximum retinoblastoma cases were in the 0-4 age group, accounting for 78% (females) and 81% (males) of pooled cases from five PBCRs. The pooled crude incidence rate in the 0-14 age group was 3.5 and the pooled ASIR was 4.4 per million. The pooled ASIR in the 0-4, 5-9 and 10-14 age group were 9.6, 2.0 and 0.1 respectively. The M/F ratio in Chennai (1.9) and Bangalore PBCRs (2.0) was much higher than the other PBCRs. Among the PBCRs, the highest incidence rate in 0-4 age group was found in males in Chennai (21.7 per million), and females in Kolkata (18.9 per million). There was a distinct variation in incidence rates in the PBCRs in different geographic regions of India.

• Asian Pacific Journal of Cancer Prevention
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• 제15권20호
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• pp.8753-8757
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• 2014

Background: Glioma is a heterogeneous central nervous system (CNS) tumor group that encompasses different histological subtypes with high variability in prognosis. The lesions account for almost 80% of primary malignant brain tumors. The aim of this study is to extend our understanding of the glioma epidemiology in the central Tunisian region. Materials and Methods: We analyzed 393 gliomas recorded in cancer registry of central Tunisia from 1993 to 2012. Crude incidence rates (CR) and world age-standardized rates (ASR) were estimated using annual population data size and age structure. Statistic correlations were established using Chi-square and Kaplan-Meier test. Results: Tunisian glioma patients were identified with a mean age at diagnosis of 48 years and 1.5 sex ratio (male/female). During the 19 years period of study the highest incidence value was observed in male group between 1998 and 2002 (CR: 0.28, ASR: 0.3). Incidence results underline increasing high grade glioma occurring in the adulthood in the last period (2007-2012). Median survival was 27 months, with 1-, 2- and 5-year survival rates of 42%, 30% and 26%, respectively. Survival was greater in patients with younger age, lower tumor grade, infratentrial tumor location and undergoing a palliative treatment. Conclusions: This central Tunisia gliomas registry study provides important information that could improve glioma management and healthcare practice.

• 한국산업보건학회지
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• 제25권3호
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• pp.346-354
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• 2015

Objectives: This study was conducted to evaluate the changes and regional differences of mortality and morbidity particularly respiratory system diseases in the area of exposure to coal dust(Ansim area, Dong-gu, Daegu). Methods: The authors analyzed secondary data(cancer registration data, mortality data, and health insurance data) for respiratory system diseases. We calculated age standardized incidence ratio(SIR), mortality ratio(SMR), and health care utilization ratio(SHR) using those data. Results: There were no significant differences between Ansim area(or Dong-gu, Daegu) and the control area for cancer registration data and mortality data. In the results for the health insurance data, significant increased SHR in asthma was observed compared to the control area. Conclusions: Although confounders such as selection bias were not clearly ruled out, our findings reveal increased asthma SHR in the area of exposure to coal dust. Further prospective studies are required to clarify the increasing respiratory disease due to exposure to coal dust.

• Pediatric Infection and Vaccine
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• 제31권1호
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• pp.25-36
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• 2024

목적: 테트라사이클린 (tetracycline, TC)은 소아청소년을 대상으로 복용하였을 시 영구적 치아 변색의 위험이 증가된다는 보고에 따라 미국에서는 8세 이하, 국내에서는 12세 미만으로 처방이 가이드라인상 추천되지 않고 있는 실정이다. 이에 본 연구에서는 TC에 노출된 소아청소년을 대상으로 치아 변색의 발생률을 분석하고, TC에 노출되지 않은 일반 인구 집단과의 발생률 차이를 비교하고자 하였다. 방법: 본 코호트 연구는 2008년 1월부터 2020년 12월 사이 최소 1일 이상 TC에 노출된 소아청소년(0-12세)에 대한 건강보험심사평가원 데이터베이스 정보를 기반으로 분석하였다. TC 노출 6개월 이후 치아 변색 관련 진단코드의 입력여부를 기준으로 치아 변색 발생률을 도출하였고, 추가적으로 연령 보정이 된 TC에 노출되지 않은 일반 인구집단을 추출하여 이를 변수로 한 표준화한 치아 변색 발병률(standardized incidence ratio, SIR)을 구하였다. 결과: 총 56,990명이 포함되었으며, 이 중 8세 미만은 1,735명, 그리고 8-12세는 55,255명이었다. 이 중 61%가 14일 미만 동안 TC를 처방받았으며, 독시사이클린(61%)과 미노사이클린(35%)을 포함한 2세대 TC가 가장 많은 비중을 차지하였다. 0-7세 연령군에서의 5년 및 10년 누적발생률은 4.1% (95% confidence interval [CI], 3.0% to 5.7%) 및 5.7% (95% CI, 4.1% to 7.8%)으로 확인되었고, 이에 비해 8-12세 연령군에서는 0.8% (95% CI, 0.7 to 0.9%) 및1.3 (95% CI, 1.1% to 1.4%)으로 상대적으로 낮았다. TC노출 후 치아 변색의 발생률은 연령 보정된 일반 인구 집단과 비교하였을 때 통계학적으로 유의미한 차이는 없었다 (SIR, 1.08; 95% CI, 0.69 to 1.60). 결론: TC 노출은 일반 인구에 비해 치아 변색 위험을 유의하게 증가시키지 않았으며, 특히 8-12세 사이의 TC 노출군은 그 이하 연령군에 비해 유의미하게 낮은 발생률을 보였다. 따라서, 국내에서 TC 처방에 대한 연령 제한 완화를 고려할 필요가 있다.

• Journal of Yeungnam Medical Science
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• 제41권2호
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• pp.86-95
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• 2024

Background: This study aimed to investigate the impact of coronavirus disease 2019 (COVID-19) on the development of major mental disorders in patients visiting a university hospital. Methods: The study participants were patients with COVID-19 (n=5,006) and those without COVID-19 (n=367,162) registered in the database of Keimyung University Dongsan Hospital and standardized with the Observational Medical Outcomes Partnership Common Data Model. Data on major mental disorders that developed in both groups over the 5-year follow-up period were extracted using the FeederNet computer program. A multivariate Cox proportional hazards model was used to estimate the hazard ratio (HR) and 95% confidence interval (CI) for the incidence of major mental disorders. Results: The incidences of dementia and sleep, anxiety, and depressive disorders were significantly higher in the COVID-19 group than in the control group. The incidence rates per 1,000 patient years in the COVID-19 group vs. the control group were 12.71 vs. 3.76 for dementia, 17.42 vs. 7.91 for sleep disorders, 6.15 vs. 3.41 for anxiety disorders, and 8.30 vs. 5.78 for depressive disorders. There was no significant difference in the incidence of schizophrenia or bipolar disorder between the two groups. COVID-19 infection increased the risk of mental disorders in the following order: dementia (HR, 3.49; 95% CI, 2.45-4.98), sleep disorders (HR, 2.27; 95% CI, 1.76-2.91), anxiety disorders (HR, 1.90; 95% CI, 1.25-2.84), and depressive disorders (HR, 1.54; 95% CI, 1.09-2.15). Conclusion: This study showed that the major mental disorders associated with COVID-19 were dementia and sleep, anxiety, and depressive disorders.