About three in 10 Americans say they have delayed seeking medical treatment within the past year because of medical costs, according to a new poll published Monday.

A Gallup poll found that 29 percent of respondents said they had put off treatment because of costs. About 19 percent said they delayed treatment for serious or somewhat serious conditions, according to the poll.

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The 29 percent who put off treatment last year was consistent with findings from the same poll in recent years. An average of 30 percent of respondents has said they put off treatment each year because of costs since 2005, up from 24 percent in the four years before that, according to the poll.

The poll also found that uninsured Americans were the most likely to delay treatment, while people covered by private insurance were the next most likely to do so. Survey respondents who were enrolled in Medicare or Medicaid were the least likely to put off treatment, according to the poll.

The poll's results were based on telephone interviews with a random sample of 1,037 adults from Nov. 1-11. The poll has a margin of error of 4 percentage points.