Abstract:

Objective To estimate cancer incidence in Guangxi in 2012 based on analysis of malignant tumor data in several cancer registries. Methods Data from 6 of 7 cancer registries were found to satisfy NCCR quality standards and so were collected and stratified by area  （urban/rural），gender，age group and cancer site. Age-standardized incidence rates were calculated using the China census data from 2000 and Segi′s population data. Results Data for the year 2012 from these 6 cancer registries（2 urban and 4 rural），covering a total population of 5，042，985（1，872，351 in urban areas and 3，170，634 in rural areas），indicated 12，274 new malignant tumor cases. Just over half of these were morphology-verified（MV% 51.34%），while 1.62% of cases were identified through death certificates only（DCO%）. The ratio of mortality to incidence  （MI ratio） was 0.61. Crude incidence was 243.39/105  （males，284.32/105；female，198.20/105），age-standardized incidence was 213.72/105 based on a China standard population  （ASIRC） and 208.12/105 based on a world standard population（ASIRW）. Cumulative incidence among people aged 0-74 years was 23.47%. In urban areas，crude incidence was 244.99/105 and ASIRC was 201.64/105；the corresponding values in rural areas were 242.44/105 and 224.62/105. The 10 most frequent cancers were lung，liver，colorectum，stomach，breast，nasopharynx，esophagus，cervix，brain-CNS and leukemia；these accounted for about 79.28% of all new cancer cases. Conclusions The three most frequent malignant tumors（lung，liver，colorectum） accounted for nearly half of all new cancer cases. These results suggest that cancer prevention and control efforts in Guangxi should focus on lung cancer，liver cancer，colorectal cancer and nasopharyngeal carcinoma.

Key words: Cancer registry, Malignant tumor, Incidence mortality, Guangxi