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Figure 1 | BMC Medical Research Methodology

Figure 1

From: Ongoing monitoring of data clustering in multicenter studies

Figure 1

Side-by-side box-plot of sitting height (cm) measurements, by polyclinic. (Missing polyclinics in each box-plot reflect polyclinics that had either not commenced recruitment, or had no records entered into the database at the date of the download). 1A: September 2008 data download (total n = 1,572 records from 15 polyclinics). 1B: March 2009 data download (total n = 4,865 records from 27 polyclinics)

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