Within two weeks of randomization, the nurse interventionist calls each intervention arm
patient for introductions and initiation of the first encounter. During scheduled telephone
contacts every eight weeks thereafter, the nurse delivers intervention modules from the 3
content areas from Table 1. Modules are delivered based on a patient-specific fixed schedule
(Appendix A). For each scheduled call, the nurse interventionist makes at least 4 attempts to
reach the subject on a mutually agreed-upon day and time. If all attempts at a scheduled call
fail, the interventionist mails a letter asking patients to call a toll-free study number to
arrange a follow-up call. When modules cannot be completed, the module schedule shifts
back, such that the missed module is covered at the next encounter. Subjects who miss
encounters therefore do not complete all 12 modules. Between scheduled calls, patients may
call the nurse interventionist with questions related to their diabetes and hypertension.
Should urgent health care issues arise during or as a result of any study calls, the nurse either
contacts the patient’s PCP/study physician or else refers patient for emergency care if
indicated.