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. Author manuscript; available in PMC: 2012 Nov 10.
Published in final edited form as: Clin Trials. 2009 Apr;6(2):141–150. doi: 10.1177/1740774509102590

Figure 4.

Figure 4

DCRI overall error rate for SPC audits, 2001–2006. Data show a downward trend in error rates following the initiation of SPC audits (and therefore an increase in data quality).