TABLE 3—

Regression Analysis for Selected Categories of Medicaid Costs: Estimated Differences Associated With Child WIC Participation

	Completed Year of Age
	1	2	3	4
Total Medicaid costs, $
Low WIC participation	62	68	95*	175**
Medium WIC participation	87**	100*	108*	224**
High WIC participation	163**	197**	204**	345**
Physician costs, $
Low WIC participation	16	29*	40	120*
Medium WIC participation	41**	59**	77**	163**
High WIC participation	80**	103**	120**	214**
Outpatient costs, $
Low WIC participation	36**	28**	29**	24**
Medium WIC participation	32**	28**	30**	21*
High WIC participation	36**	31**	43**	34**
Prescription drug costs, $
Low WIC participation	4	23	9	10
Medium WIC participation	19**	41*	15**	25*
High WIC participation	36**	90**	36**	56**
Dental costs, $
Low WIC participation	–1	2	4	11*
Medium WIC participation	–1	7*	6	21**
High WIC participation	2*	11**	20**	30**

Note. Estimated differences are based on Tobit regression coefficients for each WIC group compared to the no-WIC group after adjustment for all other risk factors in the regression model (see Table 1 ▶) and are significant at the .05 (*) or .01 (**) level. WIC = Special Supplemental Nutrition Program for Women, Infants, and Children.

*P < .05; **P < .01. All P values are 2-tailed.