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Table 2 Timelines established to assess time gap between 6-week visit and receipt of data

From: Assessment of data quality in an international multi-centre randomised trial of coronary artery surgery

'CLEAN' DATA    'DIRTY' DATA
Randomisation    Randomisation
I    I
Surgery    Surgery
I    I
6 week follow-up visit TIME GAP TIME GAP 6 week follow-up visit
I    I
Data received    Data received
I    I
Data entered into a database    Data sent back for correction
    I
    Corrected data received
    I
    Data entered into a database