Suggestions(5)
Exact(2)
Information has been validated by available sources (mainly local Cancer and Mortality Registries).
For 90% of the breast cancer patients, information on family history was obtained and the accuracy of this retrospectively retrieved information has been validated (Murff et al, 2004; Verkooijen et al, 2004).
Similar(57)
The data go through quality assurance and validation checks and once the data have been validated the information is added to the database.
This is the first study, to our knowledge, to describe the use of NLR in a non-selected unresectable mCRC setting for patients receiving first-line palliative chemotherapy to provide useful information regarding prognostication, and the data have been validated in an independent community-based cohort.
The present retrospective study used data from the Mayo Clinic Life Sciences System [ 9], an exhaustive database of patient information which has been validated previously and is reliable [ 10, 11].
Recorded information on cancer has been validated in a related database (General Practice Research Database), which shares some practices with THIN and uses the same electronic software for data collection (37).
Information up to 2011 has been validated by the Members of the Economic Policy Committee of the ECOFIN Council.
The CEAP classification includes aetiological, anatomical, and pathophysiological information and its construction has been validated.
Also, none of the populations had complete covariate information (including BMI) and none has been validated yet in other populations, which is essential prior to their implementation in clinical practice.
Information on registration of selected variables has been validated based on data from one high-volume hospital, and few errors were observed in the registration of date of operation (1.1%) and in laterality (0.2%) (Arthursson et al. 2005).
As participants were health professionals, the accuracy of self-reported data is likely to be high; information on many exposures, including endoscopy, has been validated previously (Willett et al, 1985; Rimm et al, 1990; Wolf et al, 1994).
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com