Most respondents are “very concerned” that health-care reform would lead to higher costs, lower quality, fewer choices, a bigger deficit, diminished insurance coverage and more government bureaucracy. About six in 10 are at least somewhat worried about all of these factors, underscoring the challenges for lawmakers as they attempt to restructure the nation’s $2.3 trillion health-care system.

Part of the reason so many are nervous about future changes is a fear they may lose what they currently have. More than eight in 10 said they are satisfied with the quality of care they now receive and relatively content with their own current expenses, and worry about future rising costs cuts across party lines and is amplified in the weak economy.