Deep Dive Randomized Control Trial

Inclusion Criteria: * All employees, dependents and retirees in one of seven large employer groups, including a state university system, a state employee group, two manufacturing companies, a natural resource extraction company, a public educational service agency, and a nonprofit multiple employer association for independent colleges were eligible for inclusion. Exclusion Criteria: * no financial information was available from their facility and professional claims; * they were in an employer sub-group ineligible for care support services; * they asked not be to contacted or were deceased; * gender information was missing from their eligibility files; * their claims data from the year prior to the start of the study indicated diagnoses of HIV, AIDS, end-stage renal disease (ESRD), organ transplants, or necrotizing fasciitis (intended to improve the likelihood of a balanced distribution of costs and conditions); OR * they were in an employer sub-group with less than four months of enrollment prior to the study start date (resulting in too little information for stratification).