SOURCE Authors' analysis of data from the 2005–06 and 2009–10 National Survey of Children with Special Health Care Needs. NOTES The reference groups are the following: for race or ethnicity, non-Hispanic white; for primary language, English; for income (as percentage of the federal poverty level), 400 percent or more; for insurance, private. The whiskers denote 95% confidence intervals. An incidence rate ratio of 1 would indicate the same number of unmet needs that the reference group had. A ratio of greater than 1 indicates more unmet needs than the reference group had, and a ratio of less than 1 indicates fewer unmet needs.