Estimation of Esophageal Cancer Incidence in Tehran by Log-linear Method using Population-based Cancer Registry Data

Abstract

Background: Having knowledge or estimation of cancer incidence is necessary for planning and implementation of any cancer prevention and control programs. Population-based registries provide valuable information to achieve these objectives but require extra techniques to estimate the incidence rate. The present study aimed to estimate the esophageal cancer incidence using a log-linear method based on Tehran population-based cancer registry data. Materials and Methods: New cases of esophageal cancer reported by three sources of pathology reports, medical records, and death certificates to Tehran Metropolitan Area Cancer Registry Center during 2002-2006 were entered into the study and the incidence rate was estimated based on log-linear models. We used Akaike statistics to select the best-fit model. Results: During 2002-2006, 1,458 new cases of esophageal cancer were reported by the mentioned sources to the population-based cancer registry. Based on the reported cases, cancer incidence was 4.5 per 100,000 population and this was estimated to be 10.5 per 100,000 by the log-linear method. Conclusions: Based on the obtained results, it can be concluded that an estimated incidence for 2004 of 8.3 per 100,000 population could be a good benchmark for the incidence of esophageal cancer in the population of Tehran metropolis.

Estimating the Esophagus Cancer Incidence Rate in Ardabil, Iran: A Capture-Recapture Method

“…The mean age of all subjects was 66.68 ± 13.23 years (67.60 ± 12.91 for men and 65.48 ± 13.58 for women). The age distribution does not show the difference between men and women and slightly higher than the average age reported by studies conducted in other parts of Iran that reported average age 58 - 65 years for esophagus cancer ( 17 - 19 ), but reported average age in the study conducted in Tehran metropolitan was 70.40 (70.5 for men and 70.3 for women) that is slightly higher than present study ( 7 ). Male to female ratio was 1.29 that is consistent with international and regional reports ( 2 , 7 , 20 ).…”

“…Completeness is defined as the proportion of incident cancer cases that is registered ( 5 ). Completeness level of cancer registration is one of the main parts of quality control in such registration ( 7 ). Since most cancer registries employ more than one data source for case finding, capture-recapture methods may be used to estimate the number of incident cases in the population, and hence to assess completeness of case ascertainment ( 8 ).…”

“…Firstly, the sources are independent, and secondly, all individuals within the same source have an equal chance of being included ( 9 , 11 ). The use of capture-recapture methods is very efficient for reducing the costs of disease registration as well as reducing bias in incidence estimations and in the case of comparing population subgroups ( 7 ). Ardabil province is located in Northwestern Iran, an area 70 km inland from the western Caspian coastline.…”

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

“…However, it is noteworthy that our study population consisted of referred patients, and due to increasing medical centers in other provinces, reduced frequency of referred malignancy in the years 2000 onwards could be expected. The mean age of patients in the study of Mosavi was 70 years old and there was no difference in age between men and women in 2002-2006 but Sex ratio (male to female) was 1.3 (Mosavi-Jarrahi et al, 2013). In a study of Mansour-Ghanaei the mean age of patients was 63 between 1996 to 2005 (Mansour- .…”

Dietary and Demographical Risk Factors for Oesophageal Squamous Cell Carcinoma in the Eastern Anatolian Region of Turkey Where Upper Gastrointestinal Cancers are Endemic

“…ESCC is especially endemic in the Eastern Anatolian region of Turkey, as well as some parts of Iran, Afghanistan, Turkmenistan, Kyrgyzstan, Uzbekistan, India, China, and Latin America (Moore et al, 2010;Uyanikoglu et al, 2011;Mosavi-Jarrahi et al, 2013;Tang et al, 2013;De Stefani et al, 2014). In the present study, we compared the demographic features and nutritional habits of 208 ESCC patients in the Eastern Anatolian region with those of a control group, and we evaluated the results of our study in light of the current literature.…”