Percentage of providers referring to the depression care manager. To measure adoption, data were extracted from the Medical SAS Datasets at the Austin Information Technology Center. The post-period was defined as the 12 months after each CBOC start date (defined as the date the first patient was enrolled in the telemedicine-based CCM program), which ranged from April 2006 to February 2008. The number of primary care providers at each CBOC was determined from the SAS Medical Datasets using unique provider IDs for all types of primary care providers (e.g., general internist, advance practice nurse). The number of primary care providers referring a patient to a depression care manager during the 12-month post-period was identified from NetDSS. The adoption rate for each CBOC was defined as the total number of primary care providers referring a patient to the depression care manager (identified from NetDSS) during the 12-month period divided by the total number of primary care providers seeing patients during the 12-month period (identified from SAS Medical Datasets).