Demographic and socioeconomic data were ascertained through a structured questionnaire.
Socio-demographic, household income, and comorbidity data were ascertained through the telephone interview.
Recurrence and survival data were ascertained through the Rhode Island Tumor Registry and Rhode Island Hospital chart review.
The quality of the data was ascertained through visual inspection of the scout projection and reconstruction images.
All data were ascertained through the Hawaii Tumor Registry (HTR), which provides population-based coverage of all newly diagnosed cancer cases and subsequent follow-up status for residents of Hawaii.
Primary TKR data ascertained from the Australian Orthopaedic Association National Joint Replacement Registry.
The questionnaire did not allow for the diagnosis of each headache attack; this type of data is best ascertained through a daily headache diary.
The VM training dataset was formed by randomly selecting 4/5 of the AMD cases (n = 349) and 4/5 of the controls (n = 216) with complete risk factor data, who were ascertained through ophthalmology clinics at Vanderbilt and Duke University Medical Centers.
Smoking history was self-reported at baseline; newly diagnosed BCCs and SCCs were ascertained through data linkage and verified by histopathology reports.
These data include some deaths ascertained through active follow-up so they correspond to mortality estimates somewhere between Method 1 and 2 in our paper.
