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We have a CRF that a central cardiologist reads an ECHO and enters three values for certain fields. We created a calculated field on that CRF to take the average of the three reads. We have found that if one of the fields is missing (for example one of the three images can't be read) the calculation does not work. Is there a way to write the calculation so it takes the average as long as at least one field is entered? This calculation is part of inclusion criteria so it must be on the CRF, we can't do the calculation after downloading the data. We had hoped to have the database do it automatically otherwise we rely on the cardiologist to do it by hand. Thanks, Adrienne