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Table 4 The correlation between the audited and reported data for the number of referrals r, the total number of patients seen n and the proportion of referrals r/n, for all the post-intervention data where both are available.

From: Imputation of a true endpoint from a surrogate: application to a cluster randomized controlled trial with partial information on the true endpoint

r

n

r/n

0.17

0.36

0.30