For many homeowners that have fallen behind on their mortgages, a loan modification doesn't prove to be a cure-all.

Six in 10 delinquent homeowners that recently received mortgage modifications defaulted again within 18 months, according to a new study by TransUnion, a major U.S. credit bureau. (Hat tip: American Banker.)

There is one silver lining: Homeowners that received mortgage modifications fared better on new consumer loans than homeowners that did not receive mortgage modifications. They were roughly half as likely to default on a new auto loan and four-fifths as likely to default on a new credit card loan as those that did not receive a mortgage modification.

The study examined homeowners that had been at least 120 days delinquent on their mortgages. It defined re-default as being delinquent for 60 days or more.

There's still no consensus on the effectiveness of mortgage modifications. A new study by Amherst Securities Group, a broker-dealer in mortgage-backed securities, found that mortgage modifications that included a principal reduction have been more effective at preventing foreclosures than mortgage modifications that only reduced interest rates, according to CNN Money. Principal reductions bring the amount owed closer to the home's market value.

The Amherst study found that 12 percent of borrowers who got principal reductions re-defaulted last year, compared to 23 percent of homeowners who received only interest rate reductions and 30 percent of homeowners who only were able to postpone their mortgage payments, according to CNN Money.

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  • 10. Nevada

    Percentage of residents that lost at least one-quarter of their income, 2010: 22.10 percent.

  • 9. Idaho

    Percentage of residents that lost at least one-quarter of their income, 2010: 22.63 percent.

  • 8. West Virginia

    Percentage of residents that lost at least one-quarter of their income, 2010: 22.15 percent.

  • 7. South Carolina

    Percentage of residents that lost at least one-quarter of their income, 2008: 22.01 percent.

  • 6. California

    Percentage of residents that lost at least one-quarter of their income, 2010: 22.67 percent.

  • 5. Georgia

    Percentage of residents that lost at least one-quarter of their income, 2009: 22.82 percent.

  • 4. Florida

    Percentage of residents that lost at least one-quarter of their income, 2008: 23.73 percent.

  • 3. Alabama

    Percentage of residents that lost at least one-quarter of their income, 2010: 23.19 percent.

  • 2. Arkansas

    Percentage of residents that lost at least one-quarter of their income, 2010: 23.64 percent.

  • 1. Mississippi

    Percentage of residents that lost at least one-quarter of their income, 2010: 24.54 percent.