WASHINGTON -- Light is starting to peek into the dark confusion of health-care quality and costs.

For consumers who want to know, there are now ways to compare cost estimates for surgeries. You can learn how often hospitals lose patients as customers, and how often they get them back after less than a month, because of complications and mistakes.

This increased transparency is one of the great hopes among health-care reformers for tackling the high cost of American medicine. Employers, who pay for most health care through employee insurance, are pressing for more information and are giving it to their workers.

You can go online and do some comparison shopping for a hospital at the federal Web site www.hospitalcompare.hhs.gov.

The Leapfrog Group, the health-care watchdog of the nation's largest employers, runs a Web site -- www.leapfroggroup .org -- for consumers to review and compare local hospital safety, quality and efficiency information.

Consumers Union offers a site that reports hospitals having the most trouble stopping the spread of infections among patients ( www.stophospitalinfections.org/infection--prevention/).

Much of this material comes from the U.S. Department of Health and Human Services. The department's Centers for Medicare and Medicaid Services collects mountains of information from hospitals and doctors who treat Medicare and Medicaid patients.

Until recently, however, the department hasn't been able to do much data mining with this information.

The department's Hospital Compare site starts things moving in the right direction. With a few keystrokes, you can line up any three hospitals to judge where you'd like, say, a hip replacement.

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