Ideally, secondary analysis uses pre-existing data to investigate the research question at hand.
As a result, pre-existing data are often used for validation.
Pre-existing data from a fourth laboratory have also been considered where appropriate.
To map these associations, Sole and Seoane turned to a pre-existing data set called WordNet – a "semantic network" where words are linked according to similarity and other rules.
To design a proxy to the Charlson comorbidity index (PrCCI) for use in studies with pre-existing data sources and to analyse its influence on mortality risk in elderly people.
Many researchers have investigated semantic attributes of sounds, such as "harshness" or "complexity" (see Section 4 below for citations), or broader sound categories which can also be included, either from pre-existing data, if an associate (described below) has such data on that particular sound, or by aggregating ratings submitted on the website (see Section 8.4 below).
This paper summarizes the research findings obtained from a systematic approach consisting of (1) statistical analyses of pre-existing data accumulated for quality assurance purposes, (2) experimental investigations based on the statistical analysis results, and (3) in-field investigation of the rutting performance of low traffic volume pavement.
The main purpose was to compare the biomechanical properties of a carbon-fibre reinforced polyetheretherketone (CF-PEEK) composite locking plate with pre-existing data of a titanium-alloy plate when used for fixation of an unstable 2-part fracture of the surgical neck of the humerus.
This chapter identifies: the schemas of the application data on the server and their mapping to pre-existing data sources; the business logic of the application; the hypertexts for navigating within them, thus generating the Web interface on the client; and the styles of presentation being offered to the user on the client.
The platform works because it utilizes pre-existing data.
[We used] a large pre-existing data set collected from 1991 to present.
