Data Quality of Childhood Cancer in Khon Kaen,Thailand, 1990-2007

Introduction: Khon Kaen Cancer Registry (KKCR) was established in 1984. KKCR aims to collect allcancer cases in Khon Kaen Province. The poorly qualified data may lead to distort the cancer burden andmisinterpretation of policy maker. Objective: To assess data quality in childhood cancer between 1990 and 2007in Khon Kaen Province, Thailand. Materials and Methods: Data of childhood cancer cases aged less than 20 yearsdiagnosed during 1990-2007 were retrieved from the population-based data set of KKCR. All childhood cancerdata were verified before data entry. Internal consistency, percentage of morphological verification (MV%) andcancer cased of the basis of diagnosis by death certificate only (DCO%) were evaluated. The age-adjusted rate(ASR) was calculated by standard method. Results: The data of childhood cancer from KKCR is acceptablyqualified which reflects the quality of the whole registration.