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. Author manuscript; available in PMC: 2010 Oct 22.
Published in final edited form as: Clin Trials. 2009 Feb;6(1):67–75. doi: 10.1177/1740774508100983

Table 2.

Database quality before and after centralization

Before centralization N=60 audits
Average error rate Min Max IQR Median
0.81% 0.00% 10.00% 0.04–1.0% 0.22%
After centralization N=44 audits
Average error rate Min Max IQR Median
0.19% 0.00% 0.96% 0.01–0.27% 0.09%