Table 4: Medical utilization and costs over time ( patients).

12 months before enrollment12 months after enrollment
Mean (SE)

ER visits**0.841.57
ER visit admissions 0.290.29
Admits acute 0.410.39
Outpatient office visits**1.424.34
Net medical costs $5847$5714
Net pharmacy costs**$3528$4655
Net medical and pharmacy costs*$11,676$13,300

* P < .05, **P < .01.