This analysis consists of two reports. Report 1 estimates background rates of higher dosage strength opioid analgesic users in the Sentinel Distributed Database (SDD). Report 2 calculates summary statistics on length of treatment episode among users of higher dosage strength opioid analgesics in the SDD. Data from January 1, 2012 to June 30, 2018 from 17 Data Partners contributing to the SDD were included in this request. This request was distributed to Data Partners on November 12, 2018.