The user may also query the database by data source, date and date range to generate a report.
From each data source, dates and codes for endoscopy procedures were identified that occurred within one year prior to colorectal cancer diagnosis for each patient included in the study.
We allowed some difference in injury dates between data sources, although date differences were not allowed to exceed 2 months.
To examine the accuracy of surgery dates identified from administrative data sources, the date of surgery based on the Cancer Registry was subtracted from the date of surgery based on each of the administrative datasets.
These data sources are dated and may not reflect recent changes in incidence of NMSC.
The top of the home page of MASiVEdb features a primary menu with the main sections, and a secondary menu with quick links to news, publications, acknowledgements (which include data sources, versions, dates and related information), and three pre-defined links for generic communication, error reporting, and genome inclusion requests.
Data were combined using the following rules: 1) if a surgery date for a patient was only in one of the data sources then that date was included in the combined dataset; 2) if the data sources had two different surgery dates, the earlier date was included in the combined dataset.
We used the earliest recorded date of cancer diagnosis on any of the four data sources as the index date.
We used the earliest recorded date of heart failure on any of the three data sources as the index date for the diagnosis of heart failure.
Key variables captured for each record from different data sources include identification variables, date of birth, birth outcome, length of gestation, and date of death, among others.
We used the earliest recorded date of the relevant diagnosis or procedure on any of the three data sources as the index date for the diagnosis.
