General population surveys of health insurance coverage are thought to undercount Medicaid enrollment, which may bias estimates of the uninsured. This article describes the results of an experiment undertaken in conjunction with a general population survey in Minnesota. Responses to health insurance questions by a known sample of public program enrollees are analyzed to determine possible reasons for the undercount and the amount of bias introduced in estimates of uninsured people. While public program enrollees often misreport the type of coverage they have, the impact on estimates of those without insurance is negligible. Restrictions to generalizing the finding beyond this study are discussed.
No studies to date have examined access to insurance coverage or medical care for a broadly defined population of uninsured nonelderly adults with disabilities. This analysis uses the 2002 National Survey of America's Families to examine access to coverage, access to care, and service use for a large sample of adults with disabilities, with a focus on the uninsured. All disabled groups reported unmet need and service use greater than their nondisabled counterparts with the same insured status. Access to coverage was most problematic for low-income adults with work limitations but no other indication of disability, with over one-third uninsured. This group deserves greater policy attention.
Objective. To examine the impact of mandatory HMO enrollment for Medicaidcovered pregnant women on prenatal care use, smoking, Cesarean section (C-section) use, and birth weight. Data Sources/Study Setting. Linked birth certificate and Medicaid enrollment data from July 1993 to June 1998 in 10 Ohio counties, 6 that implemented mandatory HMO enrollment, and 4 with low levels of voluntary enrollment (under 15 percent). Cuyahoga County (Cleveland) is analyzed separately; the other mandatory counties and the voluntary counties are grouped for analysis, due to small sample sizes. Study Design. Women serve as their own controls, which helps to overcome the bias from unmeasured variables such as health beliefs and behavior. Changes in key outcomes between the first and second birth are compared between women who reside in mandatory HMO enrollment counties and those in voluntary enrollment counties. County of residence is the primary indicator of managed care status, since, in Ohio, women are allowed to ''opt out'' of HMO enrollment in mandatory counties in certain circumstances, leading to selection. As a secondary analysis, we compare women according to their HMO enrollment status at the first and second birth. Data Collection/Extraction Methods. Linked birth certificate/enrollment data were used to identify 4,917 women with two deliveries covered by Medicaid, one prior to the implementation of mandatory HMO enrollment (mid-1996) and one following implementation. Data for individual births were linked over time using a scrambled maternal Medicaid identification number. Principal Findings. The effects of HMO enrollment on prenatal care use and smoking were confined to Cuyahoga County, Ohio's largest county. In Cuyahoga, the implementation of mandatory enrollment was related to a significant deterioration in the timing of initiation of care, but an improvement in the number of prenatal visits. In that county also, women who smoked in their first pregnancy were less likely to smoke during the second pregnancy, compared to women in voluntary counties. Women residing in all the mandatory counties were less likely to have a repeat C-section. There were no effects on infant birth weight. The effects of women's own managed care status were inconsistent depending on the outcome examined; an interpretation of these results is hampered by selection issues. Changes over time in outcomes, both positive and negative, were more pronounced for African American women. Conclusions. With careful implementation and attention to women's individual differences as in Ohio, outcomes for pregnant women may improve with Medicaid 825
This paper examines the extent to which the State Children's Health Insurance Program (SCHIP) might be substituting for private health insurance coverage at the time of enrollment. Among children who were newly enrolled in SCHIP in 2002 in ten states, about 14 percent had private coverage that they could have retained as an alternative to SCHIP. Of this 14 percent, about half of parents reported that the private coverage was unaffordable compared with SCHIP. This suggests that relatively few SCHIP enrollees could have retained private coverage and that even fewer had parents who felt that the option was affordable.
Even with the improvements related to Medicaid managed care, rates of inadequate prenatal care and maternal smoking remain relatively high. Addressing the underlying risk factors that are facing poor women and further expanding public programs may be critical to achieving further progress.
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