The best states for kids' health are...

According to the Commonwealth Fund, Iowa and Vermont lead the nation in terms of children's health care. Oklahoma and Florida were the overall worst.

The ranking was based on a series of metrics, including: quality, cost, health care access, insurance coverage, vaccinations, equity, and well visits. Other portions of the same study studied adults and senior populations.

The report measured all states by the standard of the best-performing state in each category, and noted that even high-scoring states have much to improve upon in certain categories.

The Commonwealth Fund, started in 1918 by Standard Oil magnate Anna Harkness, is devoted to improving health care quality. A state-by-state report card is available at www.commonwealthfund.org/statescorecard/.