Coleman E, Eilertsen T, Kramer A. Reducing Emergency Visits in Older Adults With Chronic Illness. Eff Clin Pract. 2001;(4) 49-57. http://www.caretransitions.org/documents/Reducing%20ER%20-%20ECP.pdf Accessed August 1, 2014. On average, patients in the intervention group attended 10.6 group visits during the 2-year study period. These patients averaged fewer emergency department visits (0.65 vs. 1.08 visits; P=0.005) and were less likely to have any emergency department visits (34.9% vs. 52.4%; P =0.003) than controls. These differences remained statistically significant after controlling for demographic factors, comorbid conditions, functional status, and prior utilization. Adjusted mean difference in visits was –0.42 visits (95% CI, –0.13 to –0.72), and adjusted RR for any emergency department visit was 0.64 (CI, 0.44 to 0.86).