Table 1: Number of emergency department (ED) visits, ambulatory care visits, and percentage with half or more of ambulatory visits to the ED, by insurance type and usual source of care (USC) (2000, 2011), unadjusted.

YearInsurance typeMean # of ED visitsMean # of ambulatory visits % of ambulatory care visits to the ED % with half or more of ambulatory visits to the ED
USCNo USCUSCNo USCUSCNo USCUSCNo USC

2000Private0.220.37*7.603.92*5.8%14.0%*4.7%12.8%*
Medicaid0.560.19*9.537.0010.9%8.9%9.5%8.5%
Uninsured0.370.475.504.40*12.4%23.8%*12.3%25.5%*

2011Private0.280.306.994.39*5.8%8.6%*5.0%7.8%*
Medicaid0.610.6510.015.04*10.3%21.8%*8.1%21.6%*
Uninsured0.430.516.153.75*10.0%23.4%*8.8%24.1%*

for difference between USC and no USC.