Your manager likes your research idea but says you can no randomly assign patients to the patient navigator program. You have to change your study design. 30 of the hospital-owned clinics say they want to implement your patient navigator plan and 20 of the hospital-owned clinics decline. You examine the clinic attendance rates in a month. 18 of the clinics with the patient navigator program and 5 of the clinics without the patient navigator program had high attendance rates. What is your new study design? Calculate the relative measure of association and write one sentence interpreting the results.