. 2007 Jun;42(3 Pt 1):1020–1041. doi: 10.1111/j.1475-6773.2006.00636.x

Table 3.

Odds Ratios of Any ADM Specialty Care by Insurance Type Categories, at Specific Rates of HMO Penetration

	HMO Market Penetration^†

	20% OR (95% CI)	30% OR (95% CI)	40% OR (95% CI)	50% OR (95% CI)
Health insurance coverage^‡	F_{6, 383} = 3.875^****	F_{6, 383} = 4.726^****	F_{6, 383} = 4.692^****	F_{6, 383} = 3.929^****
Medicare	0.373 (0.174, 0.798)^***	0.483 (0.248, 0.941)^***	0.625 (0.328, 1.191)	0.809 (0.402, 1.630)
Medicaid	0.670 (0.419, 1.071)^*	0.841 (0.554, 1.277)	1.055 (0.694, 1.603)	1.324 (0.826, 2.122)
Private, fully managed	0.572 (0.412, 0.795)^****	0.611 (0.457, 0.817)^****	0.652 (0.492, 0.864)^***	0.696 (0.513, 0.945)^***
Private, partially managed	0.761 (0.544, 1.066)	0.837 (0.622, 1.126)	0.919 (0.683, 1.237)	1.010 (0.722, 1.412)
Other insurance plan	1.196 (0.622, 2.299)	1.101 (0.637, 1.902)	1.013 (0.546, 1.881)	0.933 (0.410, 2.125)
Not insured	0.583 (0.378, 0.899)^***	0.507 (0.344, 0.747)^****	0.441 (0.292, 0.667)^****	0.384 (0.233, 0.634)^****

^†

Twenty percent HMO market penetration, the 18.8th percentile of the distribution; 30% HMO penetration, 45.3rd percentile of the distribution; 40% HMO market penetration, 63.3rd percentile of the distribution; 50% HMO market penetration, 84.8th percentile of the distribution.

^‡

The comparison group for the tests of significance is private, unmanaged insurance plan.

Significant at .10

^**

Significant at .05

^***

Significant at .01

^****

Significant at .001.