Table 2.

Estimated and Predicted Effects of the Medical Cost Index on Families' Enrollment in EBPI-EYEM by Income Level

		Predicted Proportion (%) of Families with EBPI-EYEM Given the Cost Index at
Quartile of Family Income Distribution	Adjusted Odds Ratio of Cost Index	5%	15%	N
1	0.98 (0.94, 1.02)	16	14	18,303
2	0.96 (0.93, 0.99)*	38	31	18,083
3	0.97 (0.94, 0.99)**	55	48	18,151
4	0.98 (0.96, 1.01)	64	61	18,049
Entire sample	0.97 (0.96, 0.98)*	43	41	72,609

Note. Odds ratios for the income groups are from the models run on each subsample defined by quartile of family income. Full results of the multivariate analysis are available from the authors upon request.

^*p < .001;

^**p < .05.