Figure 2.

Incident user cohort study*. * The 6-month covariate assessment period (CAP) precedes the initiation of treatment. During the CAP we identified patient characteristics, including lab tests performed and lab test results available. After treatment start followed a 1-month lag period before events were attributed to the treatment. The arrows between prescriptions (Rx), diagnoses (Dx) and lab tests denote the fact that the temporality of events within the CAP was not considered in this study

Schneeweiss et al. BMC Medical Research Methodology 2012 12:180   doi:10.1186/1471-2288-12-180
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