Failure to adequately follow up on test results is a known problem after hospital discharge, in primary care settings, and within computerized systems. This study reviewed more than 5400 patient medical records from 19 community-based and 4 academic primary care practices and discovered a 7.1% rate of failure to inform (or document informing). Interestingly, investigators found that partial electronic health records (EHRs), with a mix of paper and electronic systems, were associated with higher failure rates than those practices without an EHR or with a complete EHR. Variations in failure rates among practices, ranging from 0% to 26%, suggest that best practices can make a significant difference. A past AHRQ WebM&M commentary discussed the impact of delayed notification for a test result following hospital discharge.